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Instruction Manual
Eagle Series
Portable Multi-Gas Detector
Part Number: 71-0028RK
Edition: Third
Released: July 2001
RKI Instruments, Inc. • 1855 Whipple Rd. • Hayward, CA 94544 • (510) 441-5656
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Table of Contents
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
About this Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
Case . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Control Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Buttons . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Alarm Lights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Battery Charger Connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Interface Port . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Buzzer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Sample-Drawing System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Sensors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Circuit Boards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Methane Elimination Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
CAL/ SETUP Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
Starting Up the Eagle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Normal Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Monitoring Combustible Gas in the PPM Range . . . . . . . . . . . . . . . . . 11
Monitoring Combustible Gases Other than Methane . . . . . . . . . . . . . 12
Setting User Access . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Turning Off the Eagle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Alarms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
Alarm Indications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Resetting Gas Alarms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
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Display Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19
User and Station ID Screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Peak Screen. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Elapsed Time Screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
TWA/ STEL Screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Battery Voltage Screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Date/ Time Screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Clear Data Logger Screens. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Remaining Log Time Screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Setup Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23
Tips for Using Setup Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Entering Setup Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Updating the Battery Type Setting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Updating Channel Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Updating the Combustible Gas Channel’s Units of Measure. . . . . . . 31
Updating the Alarm Point Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Updating the Eagle’s Serial Number . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Updating the Lunch Break Setting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Updating the Alarm Latching Setting . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Updating the Alarm Silence Setting . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Turning the User ID Function On or Off . . . . . . . . . . . . . . . . . . . . . . . . 35
Updating the Auto Calibration Settings . . . . . . . . . . . . . . . . . . . . . . . . 35
Updating the Back Light Setting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Turning the Auto Fresh Air Function On or Off. . . . . . . . . . . . . . . . . . 36
Updating the Interval Time Setting (data log option) . . . . . . . . . . . . . 37
Updating the Log Data Over Write Setting (data log option) . . . . . . 37
Updating the Time Calibration Setting (data log option) . . . . . . . . . . 38
Updating the Date and Time Settings (data log option) . . . . . . . . . . . 38
Updating the Zero Following Settings. . . . . . . . . . . . . . . . . . . . . . . . . . 39
Updating the Confirmation Beep Setting . . . . . . . . . . . . . . . . . . . . . . . 39
Returning to Default Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
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Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .41
Calibration Supplies and Equipment. . . . . . . . . . . . . . . . . . . . . . . . . . . 41
Preparing for Calibration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
Calibrating the Eagle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
Maintenance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .46
Displaying the Battery Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
Replacing Alkaline Batteries . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
Recharging Ni-Cd Batteries . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
Replacing Sensors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
Appendix A: Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .50
Appendix B: Methane Elimination . . . . . . . . . . . . . . . . . . . . . . . . .52
Appendix C: Non-Standard Toxic Gas Sensors. . . . . . . . . . . . . . .54
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
Calibrating Non-Standard Toxic Gas Sensors. . . . . . . . . . . . . . . . . . . . 55
Replacing Non-Standard Toxic Gas Sensors . . . . . . . . . . . . . . . . . . . . . 57
Parts List. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
Appendix D: Carbon Dioxide Sensors . . . . . . . . . . . . . . . . . . . . . .59
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
Normal Operation of Carbon Dioxide Sensors. . . . . . . . . . . . . . . . . . . 60
Demand Zero for Carbon Dioxide Sensors . . . . . . . . . . . . . . . . . . . . . . 60
Calibrating Carbon Dioxide Sensors . . . . . . . . . . . . . . . . . . . . . . . . . . . 60
Replacing Carbon Dioxide Sensors . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62
Parts List. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
Appendix E: Infrared Methane Sensors . . . . . . . . . . . . . . . . . . . . .64
Target Gases . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64
Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65
Calibrating Infrared Methane Sensors . . . . . . . . . . . . . . . . . . . . . . . . . . 65
Replacing Infrared Methane Sensors . . . . . . . . . . . . . . . . . . . . . . . . . . . 66
Parts List. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66
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Appendix F: Eagle Tank Tester Model . . . . . . . . . . . . . . . . . . . . . .67
Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67
Alarms. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68
Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69
Parts List. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69
Appendix G: Five-Gas and Six-Gas Models . . . . . . . . . . . . . . . . .70
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70
Displaying Additional Channels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70
Alarms. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71
Calibration, Display, and Setup Modes . . . . . . . . . . . . . . . . . . . . . . . . . 71
Appendix H: Eagle Transformer Gas Tester. . . . . . . . . . . . . . . . . .72
Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72
Alarms. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73
Parts List. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73
Appendix I: Installing the Data Logger Board . . . . . . . . . . . . . . .74
Table of Contents
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Introduction
Overview
The RKI Eagle is the most advanced portable gas detection system
available. The Eagle is built for rugged reliability and ease of use and
includes the latest innovations in gas detection technology:
• Simultaneous detection of one to six gases. Standard target gases
include combustible gas (% LEL and ppm), oxygen deficiency,
carbon monoxide, and hydrogen sulfide.
• Powerful sample-drawing pump with up to 100-foot range.
• Dot-matrix liquid crystal display (LCD) for complete,
understandable information at a glance.
• Microprocessor control for all functions, including data logging
and user-adjustable alarms.
• Visible and audible alarms for hazardous conditions and
malfunctions.
• UL and CSA classified. Intrinsic safety for Class I, Division I,
Groups A, B, C, and D hazardous atmospheres (standard 4-gas
model and non-standard toxic gas versions). Consult RKI
Instrument, Inc., for classification of other Eagle versions.
• Tough case with a balanced, light-weight design.
WARNING: The Eagle detects a combination of combustible gas,
oxygen deficiency, hydrogen sulfide and carbon
monoxide, or other toxic gases which can be lethal. Users
must follow the instructions and warnings in this
manual to assure proper and safe operation of the Eagle.
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Introduction • 1
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About this Manual
This manual is intended for use with all Eagle models. Examples used
in this manual are for the standard four-gas model (combustible gas,
oxygen, carbon monoxide, and hydrogen sulfide). Differences
between the standard four-gas model and other Eagle models are
noted where applicable. This manual is organized as follows:
• The standard sections included in pages 1 through 49 describe the
Eagle’s specifications and internal and external components. These
sections also describe the operation, calibration, and maintenance
of the Eagle.
• Appendix A lists part numbers for the Eagle’s replacement parts
and accessories.
• Appendix B describes the Eagle’s methane elimination feature.
• Appendices C through E describe the Eagle’s non-standard
sensors.
• Appendix F describes the Eagle tank tester model.
• Appendix G describes the Eagles’s five- and six-gas models.
• Appendix H describes the procedure to install the Eagle’s optional
Data Logger board.
2 • Introduction
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Specifications
Table 1 lists physical and environmental specifications for the Eagle.
Table 2 lists specifications for the Eagle’s standard sensors.
Table 1: Eagle Specifications
1
Combustible gas; Oxygen (O ),
Target Gases
2
Carbon monoxide (CO); Hydrogen sulfide (H S)
2
Case
High-impact polycarbonate-polyester blend
2
CSA/NTRL and UL classified intrinsically safe
(Class I, Division 1, Groups A, B, C, and D)
Safety/Regulatory
Dimensions
Weight
10.5 in. x 5.9 in. x 7.0 in. (26.7 cm x 15.0 cm x 17.8 cm)
5 lbs. (2.25 kg)
Power
Four D-size batteries (alkaline or Ni-Cd)
Continuous Operating
Hours
Alkaline: 30 hours (minimum)
Ni-Cd: 18 hours (minimum)
3
Operating Temperature
Humidity
14°F to 104°F (-10°C to 40°C)
0 to 95% (non-condensing)
Standard Accessories
Shoulder strap; alkaline batteries; hydrophobic probe;
5-foot hose
Optional Accessories
Ni-Cd batteries; battery charger (115 VAC);
continuous operation adapter (115 VAC or 12 VDC);
dilution fitting (1:1 or 3:1); remote alarm; data logger
1 Appendices C, D, and E describe the Eagle’s non-standard sensors.
2 Consult RKI Instruments, Inc., for regulatory classifications of versions other than the standard 4-gas
and non-standard toxic gas versions.
3 Based on RKI part number 49-1240RK.
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Table 2 lists specifications for the Eagle’s standard sensors. Your Eagle
model may not include all of the sensors listed below. The alarm
settings are user-adjustable (see “Updating the Alarm Point Settings”
on page 32.)
Table 2: Standard Sensor Specifications
Combustible Combustible
Hydrogen
Sulfide
Carbon
Monoxide
Oxygen
1
2
Gas (%LEL )
Gas (PPM )
Range
0 to 100% LEL Depends on
0 to 40% O
0 to 100
ppm
0 to 500
ppm
2
4
target gas
Alarm 1
Alarm 2
10% LEL
50% LEL
5000 ppm
19.5% O
(decreasing)
10.0 ppm
25 ppm
2
25,000 ppm
23.5% O
30.0 ppm
50 ppm
2
(increasing)
TWA Alarm
STEL Alarm
N/A
N/A
N/A
N/A
N/A
10.0 ppm
15.0 ppm
25 ppm
N/A
400 ppm
Detection
Principle
Catalytic
combustion
Catalytic
combustion
Electro-
chemical
Electro-
chemical
Electro-
chemical
Response Time
(to 90%)
30 seconds
± 5%
30 seconds
± 5%
30 seconds 30 seconds 30 seconds
5
Accuracy
± 5%
± 5%
± 5%
(of fullscale)
1 LEL (Lower Explosive Limit)
2 PPM (Parts Per Million)
3 Alarms settings are user adjustable. See “Updating the Alarm Point Settings” on page 32.
4 The PPM range represents the same range as 0 to 100% LEL for that gas. For example, 100% LEL for methane
= 5% by volume = 50,000 PPM. Therefore, the PPM range for methane is 0 to 50,000.
5 With the Eagle’s standard hose and probe attached.
4 • Specifications
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Description
Case
The Eagle has a plastic case with a full-sized handle. The high-
visibility case is shielded to reduce radio frequency and
electromagnetic interference (RFI/ EMI). The system is light-weight
and balanced, which makes the Eagle easy to carry and use for
extended periods. A foam rubber gasket between the top and bottom
case components is water- and dust-resistant. You can set the case into
2.5 in. of water without damage.
Control Panel
The control panel is at the top of the Eagle. The touch-pad buttons
reduce the risk of accidental activation. The dot matrix display
simultaneously shows the gas reading for all installed sensors. (For
the 5- and 6-gas versions, the Eagle displays the gas reading of four
channels. Use the AIR/ ▲ and SHIFT/ ▼ buttons to scroll to the non-
displayed channels.) The display also shows information for each of
the Eagle’s program modes.
Buttons
The control panel includes the following six buttons.
Table 3: Eagle Button Functions
Button
Function(s)
POWER/ENTER
• turns the Eagle on and off.
• used during setup and calibration.
RESET/SILENCE
DISP/ADJ
silences and resets audible alarm if the Eagle is programmed for
latching alarms and the Alarm Silence option is on
1
• activates display modes
• enters instructions into the Eagle’s microprocessor
LEL/PPM
switches combustible gas detection ranges between %LEL
(lower explosive limit) and PPM (parts per million)
2
AIR/▲
• activates the demand-zero function (automatically adjusts the
Eagle in fresh-air conditions)
• scrolls through the display and settings modes
SHIFT/▼
• scrolls through the calibration and settings modes
• enters instructions into the Eagle’s microprocessor
1 The Eagle’s alarms are user-adjustable. See “Setup Mode” on page 23.
2 The LEL range is commonly used for safety applications; the PPM range can be used for environmental
or other special applications.
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Alarm Lights
Two ultra-bright, red, light-emitting diodes (LEDs) provide visual
alarms for gas concentrations and malfunctions. They are mounted on
the top rear of the case for greatest visibility.
Battery Charger Connector
The battery charger connector is mounted on the top right rear of the
case. The external battery charger connects to this connector to
recharge nickel-cadmium (Ni-Cd) batteries. The continuous operation
adapter also connects to the battery charger connector.
Interface Port
The interface port is for the optional data logging or remote buzzer.
The port is mounted on the top left rear of the case. When the Data
Logging option is installed, the Eagle records gas concentrations at
programmed intervals and stores data on gas detected. You can
download these measurements through the interface port to a PC-
compatible computer for use in data analysis programs. Data retrieval
requires the Eagle Data Downloader Kit (with PC connection cable
and software).
The optional remote buzzer also connects to the interface port. The
remote buzzer is for use in applications where a remote alarm
indication is required.
Buzzer
A solid-state electronic buzzer is mounted inside the top of the case.
The buzzer sounds for gas alarms, malfunction, low battery voltage,
and as an indicator during use of the Eagle’s many display and
adjustment options.
Sample-Drawing System
The sample-drawing system includes the pump, sensor block and
connections, internal filter and charcoal scrubber, and the external
hose, probe, and hydrophobic filter. This system provides continuous
flow of sampled air to the sensors while keeping out liquids and dust.
With proper setup, the system can draw a sample flow from up to 100
feet away from the Eagle. Consult RKI Instruments, Inc., for sample
flow distances longer than 100 feet.
6 • Description
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Sensors
This section describes the Eagle’s standard sensors. Non-standard
sensors are described in Appendices C, D, and E. Your specific Eagle
model may not include all of the sensors described below. Under
normal conditions, the Eagle’s standard sensors have an operating life
of approximately two years.
Combustible gas sensor
The combustible gas (LEL) sensor is mounted with the flame arrestor
down in the sensor block to allow the sample flow to diffuse into the
sensor. Five pins extend from the top of the sensor. The sensor cable
connects to the pins on one end and terminates in a four-position
connector, which plugs into the COMB socket on the analog print
circuit board (PCB).
The LEL sensor detects combustible gas and vapors in the atmosphere
with a catalytic platinum element. The reaction of gas with oxygen on
the catalyst causes a change in the resistance of the element, which is
converted by the Eagle into a reading of combustible gas
concentration.
Oxygen sensor
The oxygen (O ) sensor is mounted face down in the sensor block to
2
allow the sample flow to diffuse into the sensor. A multi-pin plug
connects the O sensor to the CN2 socket on the analog PCB.
2
The O sensor is an electrochemical cell, which reacts to the oxygen in
2
the atmosphere and produces a voltage proportional to the oxygen
concentration. This voltage is converted by the Eagle into a reading of
oxygen concentration.
Standard toxics (CO and H2S) sensors
The CO and H S sensors are physically very similar. They have
2
cylindrical bodies and are mounted face down in the sensor block. A
three-position connector from each sensor plugs into EC1 or EC2
socket on the analog PCB. The sensor connected to the EC1 socket
displays as channel 3; the sensor connected to the EC2 socket displays
as channel 4.
The toxics sensors are electrochemical cells, which react to the target
gas in the atmosphere, producing a current proportional to the
concentration of gas. The current is converted by the Eagle into a
reading of target gas concentration.
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Circuit Boards
The Eagle circuit boards analyze, record, control, store, and display
the information collected.
The analog PCB is mounted perpendicular to the base of the
instrument case. It is located in the same half of the case as the sensors
and sample-drawing system. The sensor leads connect to the analog
PCB.
The main PCB is mounted in the top half of the case. It includes the
methane elimination and CAL/ SETUP switches.
CAUTION:The circuit boards should be serviced only by authorized repair
personnel.
Methane Elimination Switch
The methane elimination switch (SW1) is mounted near the top right
corner of the main PCB.
For applications where methane is an interfering gas, you can set the
methane elimination switch to eliminate most response to methane
(see “Appendix B: Methane Elimination” on page 52). An external
methane elimination switch is available as an option.
CAL/SETUP Switch
The CAL/ SETUP switch (SW2) is mounted near the middle left edge
of the main PCB.
This switch controls the Eagle functions available to the user by
disabling the SHIFT/ ▼ button. Without the use of this button, the
user is unable to enter Calibration or Setup mode. (Display mode is
available with either switch setting.) See “Setting User Access” on
page 13 to change the switch setting.
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Operation
The Eagle has four operating modes: normal operating mode, display
mode, setup mode, and calibration mode. This section describes the
Eagle in normal operating mode. It includes procedures to start up the
Eagle, set various detection options for the combustible gas channel,
and shut down the Eagle.
NOTE: The screens illustrated in this section are intended as
examples only. The screens displayed by your Eagle model
may be slightly different.
Starting Up the Eagle
1. Connect the sample hose to the Eagle’s quick connect inlet fitting.
2. Connect the hydrophobic filter and probe tip to the sample hose’s
quick connect fitting.
3. Press and briefly hold down the POWER/ ENTER button. If the
Lunch Break feature is on (see page 33), the Resume Datalog
screen displays. (If the Lunch Break feature is off, the Battery
Voltage screen displays.)
• Press the AIR/ ▲ button to continue accumulating time-
weighted average (TWA) and PEAK readings from the last
time the Eagle was used. (The short-term exposure limit
[STEL] reading is reset each time the Eagle is turned on.) The
Battery Voltage screen displays.
• Press the DISP/ ADJ button to restart these measurements. The
Battery Voltage screen displays
If you do not press the AIR/ ▲ or DISP/ ADJ button within 5
seconds, the Eagle automatically resumes datalog readings and
displays the Battery Voltage screen.
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The Battery Voltage screen displays the minimum usable and
actual battery voltage (for example, 6.0V). If the battery voltage is
too low, the Eagle will not continue.
NOTE: The following screen only displays if the data logging option
is installed. If the data logging option is not installed, the Self
Diagnosis screen displays after the Battery Voltage screen.
This message displays the date and time as set in Setup mode. The
data logging option uses this information to record the time and
date of sample and alarm events.
The following two screens display while the Eagle checks itself for
proper operation. The Eagle alerts you if a malfunction occurs.
When the Eagle successfully completes its self check, the OK
message displays in place of the STAND BY message, then the
normal operating screen displays. The normal screen displays
fresh-air concentrations for all gases. The Eagle sounds a double
tone to indicate it is in normal operation.
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CAUTION:Do not use gas from a cigarette lighter to test response to
combustibles. Exposing the combustible gas sensor to
uncontrolled high concentrations of gas will reduce response
and sensor life.
4. Verify that the Eagle is operating correctly. Use the RKI Check Kit
to easily verify correct operation of the Eagle.
WARNING: If the Eagle does not respond to verification, take it to a
known “fresh-air” environment, then perform the
demand zero procedure described in “Preparing for
Calibration” on page 41. Repeat step 4 before using the
Eagle in a potentially hazardous location.
Normal Operation
The Eagle continuously monitors the sampled atmosphere and
displays the gas concentrations present for its target gases. In a low-
light environment, press any button to turn on the display backlight.
(See “Updating the Back Light Setting” on page 36 to program
backlight duration.) If the Confirmation Beep option is turned on, the
Eagle beeps once every 15 minutes to verify that it’s on the job.
To use the probe, insert it into the monitoring area and wait a few
seconds for response.
NOTE: Response time increases with the length of the sample hose.
Very long sample hoses may require several seconds to show
response at the Eagle.
Monitoring Combustible Gas in the PPM Range
1. Start the Eagle in the LEL range as described in “Starting Up the
Eagle” on page 9.
2. Allow the combustibles sensor to stabilize (3 to 5 minutes). This
stabilization period is required for the PPM range only.
3. Press the LEL/ PPM button. The Eagle displays PPM in place of
LEL% for combustible gas, and the gas reading displays in parts
per million.
4. If the PPM reading is not zero, take the Eagle to a fresh air
environment, then perform the demand zero procedure as
described in “Preparing for Calibration” on page 41.
NOTE: For the data logging option, combustible gas readings are
logged in %LEL regardless of the LEL/ PPM setting.
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Monitoring Combustible Gases Other than Methane
If the combustible gas sensor is calibrated to methane (CH ), use
4
Table 4 to determine the concentration of combustible gases other
than methane. This table is based on Eagles in full response mode
(methane elimination switch set to CH4) and calibrated to methane.
Multiply the display reading by the factor in the appropriate column
in the table. For example, if you are using the Eagle to detect hexane
and the display reads 10% LEL, the actual hexane reading is
10% x 3.00 = 30% LEL hexane.
WARNING: The Eagle’s alarms are initiated by the DISPLAY reading
not the FACTORED reading. If you are monitoring for
hexane as in the example below and the low alarm is set
for 10% LEL, the Eagle will initiate a low alarm at 30%
LEL hexane (display reading of 10% LEL).
To determine the concentration of other combustible gases with the
Eagle in methane elimination mode, see Table 7 on page 53.
Table 4: Full Response Mode Conversion Factors (Methane Calibration)
LEL Factor
(Methane Calibration)
PPM Factor
(Methane Calibration)
Target Gas
Benzene
Ethane
2.80
1.40
2.25
1.58
3.00
1.65
2.83
1.93
3.00
1.00
2.33
2.30
2.00
2.80
0.67
0.84
1.5
Ethanol
Ethylene
Hexane
Hydrogen
IPA
0.4
0.67
1.4
1.13
1.21
1.08
1.00
2.57
0.92
0.80
0.67
Isobutane
MEK
Methane
Methanol
Propane
Propylene
Toluene
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Setting User Access
The CAL/ SETUP switch controls the Eagle functions available to the
user. The switch setting does not affect the Eagle’s ability to display
gas readings and indicate gas and malfunction alarms.
1. Turn off the Eagle.
2. Unscrew the two large screws on the top of the case.
3. Turn over the top half of the case, and locate the CAL/ SETUP
switch (SW2) near the middle along one edge of the main
processor board.
CAUTION:The Methane Elimination switch (SW1) is on the opposite edge
of the board near the front end. DO NOT confuse these two
switches.
4. Place the CAL/ SETUP switch in the appropriate position.
• To give the Eagle access to all modes, place the switch in the
ON position.
• To limit the Eagle to normal operating and display modes,
place the switch in the OFF position. (The Eagle prevents
access to the setup and calibration modes by disabling the
SHIFT/ ▼ button.)
5. Place the top of the case in its original position, then secure it with
the large screws you loosened in step 2.
6. Turn on the Eagle.
NOTE: Make sure the Eagle’s calibration is current and the setup
options appropriate and safe for the operating environment
before placing the CAL/ SETUP switch in the OFF position.
Turning Off the Eagle
To turn off the Eagle, press and hold down the POWER/ ENTER
button until GOOD-BYE displays, then release the button. (You must
wait for GOOD-BYE to disappear before you can turn on the Eagle
again.)
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Alarms
Alarm Indications
This section describes the Eagle’s audible and visual alarm indications
for gas, over range, low flow, low battery, and sensor failure alarms.
This section also describes how to reset gas alarms.
The default alarm settings are listed in Table 2, “Standard Sensor
Specifications” on page 4. The alarm settings are user-adjustable as
described in “Updating the Alarm Point Settings” on page 32.
NOTE: The screens illustrated in this section are intended as
examples only. The screens displayed by your Eagle model
may be slightly different.
First gas alarm
If a channel’s gas reading exceeds the first alarm setting (falls below
for the oxygen channel):
• ALM1 displays in the alarm field for that channel.
• The channel’s display line flashes.
• The buzzer sounds a pulsed tone.
• The alarm lights flash.
Second gas alarm
If a channel’s gas reading exceeds the second alarm setting:
• ALM2 displays in the alarm field for that channel.
• The channel’s display line flashes.
• The buzzer sounds a pulsed tone.
• The alarm lights flash.
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STEL alarm (toxics only)
If a toxic gas channel’s average gas reading for the past 15 minutes
exceeds the STEL alarm setting:
• STEL displays in the alarm field for that channel.
• The channel’s display line flashes.
• The buzzer sounds a pulsed tone.
• The alarm lights flash.
TWA alarm (toxics only)
If a toxic gas channel’s average gas reading for the past 8 hours
exceeds the TWA alarm setting:
• TWAdisplays in the alarm field for that channel.
• The channel’s display line flashes.
• The buzzer sounds a pulsed tone.
• The alarm lights flash.
Over range alarm
If a channel’s gas reading exceeds that channel’s full-scale setting:
• OVER displays in the alarm field for that channel.
• The channel’s display line flashes.
• The buzzer sounds a pulsed tone.
• The alarm lights flash.
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Low flow alarm
If the Eagle’s sample system becomes restricted or blocked (for
example plugged probe, fouled filter, pinched tubing):
• The message FAIL LOW FLOW LEVEL replaces the normal screen.
• The buzzer sounds a steady tone.
• The alarm lights are on continuously.
• The pump automatically shuts off to prevent damage.
Correct the flow blockage. Press the RESET/ SILENCE button to turn
off the alarms and restart the pump. If low flow conditions still exist,
the Eagle will go into alarm again. If the condition cannot be corrected
immediately, take the Eagle out of service to a non-hazardous area.
Low battery alarm
When the battery charge drops near the lower limit, the Eagle
displays the following screen (BAT flashes). For alkaline batteries, you
have approximately 3 hours of use remaining; for Ni-Cd batteries you
have approximately 15 minutes of use remaining.
Low Battery
Warning
When the battery voltage drops to the minimum limit, the following
screen displays, the alarm lights are on continuously, and the buzzer
sounds a steady tone. The Eagle is not operational as a gas monitoring
device when this screen displays.
Low Battery
ALARM
NOTE: If you are using the data logging accessory and the Eagle goes
into Low Battery ALARM, shut off the Eagle in order to save
the current data logging session.
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Sensor failure alarm and emergency operation
The Eagle continuously monitors itself for proper operation. If a
malfunction occurs, the Eagle alerts you with audible and visual
alarms.
If a sensor fails during start-up or normal operation:
• The message FAIL SENSOR displays.
• The failed sensor displays in parenthesis.
• The buzzer sounds a steady tone.
• The alarms lights flash.
If the sensor failed during start-up, the Eagle continues with the normal
start-up sequence after the fail screen displays. When the normal
screen displays, the Eagle replaces the gas reading for the failed
sensor with xxxxx.
If the sensor fails during normal operation and you want to continue
monitoring for the remaining target gases, turn the Eagle off, then follow
the appropriate start-up sequence. When the normal screen displays,
the Eagle replaces the gas reading for the failed sensor with xxxxx.
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Resetting Gas Alarms
You can set the Eagle’s gas alarms for latching or self-resetting alarms
(see “Updating the Alarm Latching Setting” on page 34).
Self-resetting alarms
Self-resetting alarms automatically shut off and reset when the gas
reading falls below (or rises above for oxygen) the alarm setting. You
cannot silence or reset self-resetting alarms.
Latching alarms
You can set latching alarms with or without Alarm Silence (see
“Updating the Alarm Silence Setting” on page 34).
With Alarm Silence on:
When the Eagle goes into gas alarm, press the RESET/ SILENCE
button to silence the buzzer. The LEDs continue to flash, and the Eagle
continues to display the current alarm level.
The gas reading must fall below (or rise above for oxygen) the low
alarm (ALM1) setting before you can reset the alarm. Press the
RESET/ SILENCE button to reset the alarm. The LEDs turn off and the
Eagle returns to the normal screen.
With Alarm Silence off:
The gas reading must fall below (or rise above for oxygen) the low
alarm (ALM1) setting before you can reset the alarm. Press the
RESET/ SILENCE button to reset the alarm. The LEDs and buzzer
turn off, and the Eagle returns to the normal screen.
NOTE: With Alarm Silence off, you cannot silence the buzzer while
the gas reading is above (below for oxygen) the low alarm
(ALM1) setting.
18 • Alarms
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Display Mode
The Eagle has four operating modes: normal operating mode, display
mode, setup mode, and calibration mode. With the Eagle in display
mode, you can:
• set user and station IDs
• display peak readings
• display elapsed time
• display TWA and STEL readings (toxic gases only)
• display battery voltage
• display date and time (data logging option only)
• clear the data log (data logging option only)
• display remaining log time (data logging option only)
To enter display mode, from the normal screen press the DISP/ ADJ
button. To scroll from one screen to the next press the DISP/ ADJ
button.
NOTE: Each screen displays for 20 seconds. If you do not press the
DISP/ ADJ button to scroll to the next screen within 20
seconds, the Eagle automatically returns to the normal
operating screen.
User and Station ID Screen
This screen displays only if the user ID function is activated (see
“Turning the User ID Function On or Off” on page 35). Each ID
contains 10 characters. Uppercase letters, numbers, asterisks (*), and a
blank space are available characters.
Use this screen to identify user, location, or other information. If your
Eagle includes the data logging option, the User and Station ID
provides a way to identify the user and location of exposure. The User
and Station ID are saved to the data logger when you turn off the
Eagle, so you can update the IDs for each data logging session.
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To enter a user and station ID:
To scroll to the next screen at any time, press the DISP/ ADJ button.
1. Press the POWER/ ENTER button. The first character under USER
ID flashes (* is default).
2. Press the AIR/ ▲ and SHIFT/ ▼ buttons to scroll through the
available characters. (The asterisk and blank space are between the
set of letters and numbers.)
3. When the desired character displays, press the POWER/ ENTER
button to enter the character and go to the next character.
4. Repeat steps 2 and 3 for the remaining 19 characters.
After you enter the last character, the Peak screen displays.
Peak Screen
The Peak screen displays the highest (lowest for O ) concentrations
2
detected since the Eagle was turned on. Peak readings are stored in
the Eagle’s memory until a higher level is detected or the Eagle is
turned off.
The Lunchbreak “RESUME” option enables the Eagle to remember
peak readings when it is turned off. See “Starting Up the Eagle” on
page 9.
Elapsed Time Screen
The Elapsed Time screen displays the time in minutes since the Eagle
was last turned on.
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TWA/STEL Screen
The TWA/ STEL screen displays the time-weighted average (TWA)
and the short-term exposure limit (STEL) readings for toxic gases only.
The TWA reading is the average reading during the last 8 hours. If 8
hours have not elapsed since the last time the TWA/ STEL reading
was cleared, the average is still calculated over 8 hours. The missing
time is assigned a 0 value for readings.
The STEL reading is the average reading during the last 15 minutes.
Battery Voltage Screen
The Battery Voltage screen displays the minimum operating voltage
and present battery voltage. New alkaline batteries typically measure
6.0 V; fully-charged Ni-Cd batteries typically measure 5.2 V. This
screen also displays when you turn on the Eagle.
NOTE: The remaining screens only display if your Eagle includes the
data logging option. If your Eagle does not include the data
logging option, press the DISP/ ADJ button to return to the
normal screen.
Date/Time Screen
The date/ time screen displays the current date and time. You can set
the date and time in Calibration or Setup mode (see page 38).
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Clear Data Logger Screens
CAUTION:Once you clear the data logger, you cannot retrieve any data
previously stored in the data logger.
The Clear Data Logger screens allow you to clear the data logger
storage to accept new data. (Press the DISP/ ADJ button to go to the
Remaining Log Time screen). You can set the Eagle to overwrite the
oldest data when the data log is full (see page 37).
To clear the data log:
1. With the above screen displayed, press the AIR/ ▲ button.
A confirmation message displays.
2. Press the AIR/ ▲ button to confirm that you want to clear the data
log.
The Eagle displays CLEARING DATA, then displays CLEARED
OK. The data log is cleared and the remaining log time value is
reset.
Remaining Log Time Screen
The Remaining Log Time screen displays the time remaining until the
Data Logger memory is full. The remaining time depends on how
often the Eagles stores data to the data log and how many channels
are active.
Press the DISP/ ADJ button once more to return to the normal screen.
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Setup Mode
NOTE: The screens illustrated in this section are examples only. The
screens displayed by your Eagle model may be slightly
different.
The Eagle has four operating modes: normal operating mode, display
mode, setup mode, and calibration mode. This section describes the
setup mode. In setup mode, you can:
• update the battery type setting
• update channel settings
• update the combustible gas channel’s units of measure
• update the alarm point settings
• update the Eagle’s serial number
• turn the lunch break function on or off
• update the alarm latching setting
• update the alarm silence setting
• turn the user ID function on or off
• update the auto calibration settings
• update the back light setting
• turn the auto fresh air function on or off
• update the data interval time setting (data logging option only)
• update the log data over write setting (data logging option only)
• update the time calibration setting (data logging option only)
• update the date and time settings (data logging option only)
• turn the zero follower on or off for each channel
• turn the confirmation beep on or off
• return to default settings (three default options)
The Eagle is pre-set to suit most applications. Follow these
instructions only if required.
Tips for Using Setup Mode
• To select a menu option, use the AIR/ ▲ or SHIFT/ ▼ button to
place the prompt next to the menu option, then press the POWER/
ENTER button to select the menu option.
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• To exit setup mode, from the main menu place the prompt next to
the last menu option, START MEASUREMENT, then press the
POWER/ ENTER button. The Eagle begins its normal start-up
sequence.
Entering Setup Mode
WARNING: The Eagle does not detect gas or display readings while
in setup mode. The CAL/SETUP switch (SW2) must be in
the ON position to enter setup mode.
1. Take the Eagle to a non-hazardous location, and turn the power
off.
2. Press and hold down the AIR/ ▲ and SHIFT/ ▼ buttons, then
press the POWER/ ENTER button. The main menu displays. It
displays four menu options at a time. Press the AIR/ ▲ or SHIFT/
▼ button to view additional menu options.
Updating the Battery Type Setting
This setting allows you to select between alkaline and Ni-Cd batteries.
The Eagle uses this setting to make sure adequate time is given
between the low battery warning and low battery alarm. This setting
has no effect on battery charging.
1. From the main menu, select the BATTERY TYPE menu option.
2. Press the AIR/ ▲ or SHIFT/ ▼ button to display the desired
setting.
CAUTION:This setting should always match the type of batteries (alkaline
or Ni-Cd) installed in the Eagle. If this setting does not match
the installed batteries, the time between low battery warning
and low battery alarm may be less than expected.
3. Press the POWER/ ENTER button to enter the setting and return
to the main menu.
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Updating Channel Settings
This procedure describes how to update channel settings for the
combustible gas, oxygen, and toxic gas channels.
CAUTION:Verify that the correct sensor is installed before you update a
channel’s settings.
Updating combustible gas channel settings
This section describes how to update the target gas label, set a custom
gas label, and update the fullscale PPM setting for the combustible gas
channel.
Updating the target gas label
1. From the main menu, select the GAS COMBINATIONS menu
option.
2. Use the AIR/ ▲ or SHIFT/ ▼ button to place the prompt next to
the combustible gas channel (in this example CH4).
3. Press the POWER/ ENTER button. The combustible gas target gas
label flashes. This indicates that this setting can now be updated.
4. Press the AIR/ ▲ or SHIFT/ ▼ buttons to display the available
combustible gas target gas labels (CH4, HEX, H2, ***, and NOT
USED).
NOTE: Select the HEX or *** setting for Methane Elimination
(see “Appendix B: Methane Elimination” on page 52 for more
information.)
5. Press the POWER/ ENTER button to enter the new target gas label.
A screen displays that shows the fullscale PPM setting, which
corresponds to 100% LEL, and display increments for the target
gas label you selected. If you select *** as the gas label, you must
update the fullscale PPM setting to correspond to 100% LEL for
the target gas.
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The number in parenthesis indicates the display increment for that
portion of the PPM range. In the example below, the PPM reading
would display in increments of:
• 5 from 0 to 100 ppm
• 50 from 100 to 1000 PPM and 1000 to 10,000 PPM
• 250 from 10,000 to 50,000 PPM
If you entered a label other than ***, continue with step 6. If you
entered ***, go to the next section, “Setting a custom target gas label.”
6. Press the POWER/ ENTER button to return to the Gas
Combinations menu.
7. To exit the Gas Combinations menu, press the SHIFT/ ▼ button
until the prompt is next to Channel 4, then press the SHIFT/ ▼
button again. The ESCAPE message displays.
8. Press the POWER/ ENTER button. The message SAVING DATA
displays, then the main menu displays.
Setting a custom target gas label
1. With the prompt next to the target gas label setting (***), press the
POWER/ ENTER button. The first asterisk flashes.
2. Press the AIR/ ▲ and SHIFT/ ▼ buttons to display the desired
character. Available characters are A through Z, 0 through 9, and a
blank space.
3. Press the POWER/ ENTER button to enter the displayed character.
The next character flashes.
4. Repeat steps 2 and 3 to enter the remaining characters. When you
enter the last character, the prompt flashes.
Updating the fullscale PPM setting
CAUTION:The fullscale PPM setting must correspond to 100% LEL for the
target gas in order for the Eagle to display accurate PPM
readings for the combustible gas channel.
1. Press the SHIFT/ ▼ button to place the prompt in the second line,
then press the POWER/ ENTER button to update the fullscale
setting. The fullscale setting flashes.
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The maximum fullscale setting for the combustible gas channel is
50,000 PPM; the minimum setting is 1000 ppm. The default setting
is 50,000 ppm.
2. Press the AIR/ ▲ and SHIFT/ ▼ buttons to display the desired
fullscale setting (see Table 5), then press the POWER/ ENTER
button to enter the setting. The prompt flashes.
Table 5: Fullscale PPM Readings
Equivalent to 100% LEL
Target Gas
Fullscale Setting
Methane (CH )
50,000 ppm
4
Hexane
Hydrogen
Pentane
Styrene
IPA
11,000 ppm
40,000 ppm
15,000 ppm
9,000 ppm
20,000 ppm
18,000 ppm
21,000 ppm
20,000 ppm
11,000 ppm
30,000 ppm
33,000 ppm
12,000 ppm
Isobutane
Propane
Propylene
Toluene
Ethane
Ethanol
Benzene
Returning to the main menu
1. Press the SHIFT/ ▼ button. The ESCAPE message displays. (Press
the AIR/ ▲ button to return to the previous screen.)
2. Press the POWER/ ENTER button to save the new setting. The
OTHER GAS SET message displays, then the Gas Combinations
menu displays.
3. To exit the Gas Combinations menu, press the SHIFT/ ▼ button
until the prompt is next to Channel 4, then press SHIFT/ ▼ again.
The ESCAPE message displays.
4. Press the POWER/ ENTER button. The message SAVING DATA
displays, then the main menu displays.
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Updating oxygen channel settings
This section describes how to update the target gas label, fullscale
setting, and display increment setting for the oxygen channel.
Updating the target gas label
1. From the main menu, select the GAS COMBINATIONS menu
option.
2. Use the AIR/ ▲ or SHIFT/ ▼ button to place the prompt next to
the oxygen channel (in this example OXY).
3. Press the POWER/ ENTER button. The oxygen target gas label
flashes. This indicates that this setting can now be updated.
4. Press the AIR/ ▲ or SHIFT/ ▼ buttons to display the available
oxygen target gas labels (OXY, ***, and NOT USED).
CAUTION:The *** setting is not intended for customer setup. Contact RKI
Instruments, Inc., before using this setting for the oxygen
channel.
5. Press the POWER/ ENTER button to enter the new target gas label.
6. To exit the Gas Combinations menu, press the SHIFT/ ▼ button
until the prompt is next to Channel 4, then press the SHIFT/ ▼
button again. The ESCAPE message displays.
7. Press the POWER/ ENTER button. The SAVING DATA message
displays, then the main menu displays.
Updating the fullscale setting
1. Press the SHIFT/ ▼ button to place the prompt in the second line,
then press the POWER/ ENTER button to update the fullscale
setting. The fullscale setting flashes.
The maximum fullscale setting for the oxygen channel is 40.0
VOL%; the minimum setting is 25.0 VOL%. The default setting is
40.0 VOL%.
2. Press the AIR/ ▲ and SHIFT/ ▼ buttons to display the desired
fullscale setting, then press the POWER/ ENTER button to enter
the setting. The prompt flashes.
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Updating the display increment setting
1. Press the SHIFT/ ▼ button to place the prompt in the third line,
then press the POWER/ ENTER button. The display increment
setting flashes. The allowable settings are 0.2 VOL% (default) and
0.5 VOL%.
2. Press the AIR/ ▲ or SHIFT/ ▼ button to display the desired
display increment setting, then press the POWER/ ENTER button
to enter the setting. The prompt flashes.
Returning to the main menu
1. Press the SHIFT/ ▼ button. The ESCAPE message displays. (Press
the AIR/ ▲ button to return to the previous screen.)
2. Press the POWER/ ENTER button to save the new settings. The
OTHER GAS SET message displays, then the Gas Combinations
menu displays.
3. To exit the Gas Combinations menu, press the SHIFT/ ▼ button
until the prompt is next to Channel 4, then press the SHIFT/ ▼
button again. The ESCAPE message displays.
4. Press the POWER/ ENTER button. The message SAVING DATA
displays, then the main menu displays.
Updating toxics channel settings
This section describes how to update the target gas label, set a custom
gas label, and update the fullscale and display increment settings for a
toxic gas channel.
Updating the target gas label
1. From the main menu, select the GAS COMBINATIONS menu
option.
2. Press the POWER/ ENTER button to display the Gas
Combinations menu.
3. Use the AIR/ ▲ or SHIFT/ ▼ button to place the prompt next to
the toxic gas channel (in this example H2S or CO).
4. Press the POWER/ ENTER button. The toxic target gas label
flashes. This indicates that this setting can now be updated.
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5. Press the AIR/ ▲ or SHIFT/ ▼ buttons to display the available
target gas labels for the toxic gas channel (H2S, CO, SO2, Cl2,
NH3, CO2 (5.00%), CO2 (10000 PPM), CO2 (5000 PPM), ***, and
NOT USED).
6. Press the POWER/ ENTER button to enter the new target gas label.
If you entered a label other than ***, continue with step 7. If you
entered ***, go to the next section, “Setting a custom target gas label.”
7. To exit the Gas Combinations menu, press the SHIFT/ ▼ button
until the prompt is next to Channel 4, then press the SHIFT/ ▼
button again. The ESCAPE message displays.
8. Press the POWER/ ENTER button. The message SAVING DATA
displays, then the main menu displays.
Setting a custom target gas label
1. With the prompt next to the target gas label setting (***), press the
POWER/ ENTER button. The first asterisk flashes.
2. Press the AIR/ ▲ and SHIFT/ ▼ buttons to display the desired
character. Available characters are A through Z, 0 through 9, and a
blank space.
3. Press the POWER/ ENTER button to enter the displayed character.
The next character flashes.
4. Repeat steps 2 and 3 to enter the remaining characters. When you
enter the last character, the prompt flashes.
Updating the fullscale setting
1. Press the SHIFT/ ▼ button to place the prompt in the second line,
then press the POWER/ ENTER button. The fullscale setting
flashes.
The maximum fullscale setting for a toxic gas channel is 1000 PPM;
the minimum setting is 1.00 PPM. The default setting is 10.0 PPM.
2. Press the AIR/ ▲ and SHIFT/ ▼ buttons to display the desired
fullscale setting, then press the POWER/ ENTER button to enter
the setting. The prompt flashes.
NOTE: The display increment setting automatically updates its
default setting as you change the fullscale setting.
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Updating the display increment setting
1. Press the SHIFT/ ▼ button to place the prompt in the third line,
then press the POWER/ ENTER button. The display increment
setting flashes.
The minimum display increment setting is 0.1 PPM; the maximum
display increment setting is 2.5 PPM.
2. Press the AIR/ ▲ and SHIFT/ ▼ buttons to display the desired
display increment setting, then press the POWER/ ENTER button
to enter the setting. The prompt flashes.
Returning to the main menu
1. Press the SHIFT/ ▼ button. The ESCAPE message displays. (Press
the AIR/ ▲ button to return to the previous screen.)
2. Press the POWER/ ENTER button to save the new settings. The
OTHER GAS SET message displays, then the Gas Combinations
menu displays.
3. To exit the Gas Combinations menu, press the SHIFT/ ▼ button
until the prompt is next to Channel 4, then press the SHIFT/ ▼
button again. The ESCAPE message displays.
4. Press the POWER/ ENTER button. The message SAVING DATA
displays, then the main menu displays.
Updating Combustible Gas Channel Units of Measure
This setting allows you to display the combustible gas reading in
percentage of LEL or percentage of volume. The detection range
remains the same. If 100% LEL equals 5% by volume, then fullscale on
the volumetric display is 5%.
1. From the main menu, select the LEL% OR VOL% (HC) menu
option.
2. Press the AIR/ ▲ or SHIFT/ ▼ button to display the desired
setting.
NOTE: The data logging option logs all combustible gas readings in
LEL% regardless of this setting.
3. Press the POWER/ ENTER button to enter the setting and return
to the main menu.
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Updating the Alarm Point Settings
Each of the Eagle’s gas detection channels includes low and high gas
alarms. The combustible gas channel also includes low and high
alarms for PPM readings; the toxic gas channels also include STEL
and TWA alarms.
This screen allows you to update one or more alarm points (the
reading at which the Eagle recognizes the alarm).
1. From the main menu, select the ALARM POINTS menu option.
2. Select the channel of the alarm point you want to update. The
channel’s Set Low Alarm Point screen displays (in this example for
the combustible gas channel).
NOTE: The Eagle displays the set alarm point screens for each
channel in the following sequence: low alarm, high alarm,
TWA alarm (toxics only), and STEL alarm (toxics only).
If this is the alarm point you want to update, continue with step 3. If
not, continue pressing the POWER/ ENTER button until the correct
set alarm point screen displays, then continue with step 3.
3. Use the AIR/ ▲ and SHIFT/ ▼ buttons to display the desired
setting.
4. Press the POWER/ ENTER button to enter the new alarm point
and scroll to the next set alarm point screen. (Repeat step 3 and 4
to update another alarm point for this channel.)
5. Press the POWER/ ENTER button to scroll to the last set alarm
point screen for this channel, then press the POWER/ ENTER
button again to return to the Set Alarm Points menu.
6. Repeat steps 2 through 5 until all desired alarm points are
updated. Make sure you return to the Set Alarm Points menu to
continue.
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7. To exit the Set Alarm Points menu, press the SHIFT/ ▼ button
until the prompt is next to Channel 4, then press the SHIFT/ ▼
button again. The ESCAPE message displays. (Press the AIR/ ▲
button if you want to return to the Set Alarm Points menu.
8. Press the POWER/ ENTER button to save the settings and return
to the main menu.
Updating the Eagle’s Serial Number
Every Eagle is programmed with a unique serial number. The Data
Logging option includes the serial number in its log data for
identification purposes. The serial number setting accepts numeric (0
through 9) and alpha (A through Z) characters.
NOTE: The serial number is factory set and should not need to be
changed. However, if you “reset all defaults,” the serial
number is reset to ******.
1. From the main menu, select the SERIAL NO. menu option.
2. Press the AIR/ ▲ and SHIFT/ ▼ buttons to display the desired
character, then press the POWER/ ENTER button to enter the
character. The next character flashes.
3. Repeat step 2 to enter the remaining characters. The main menu
displays after you enter the last character.
Updating the Lunch Break Setting
With Lunch Break OFF (default), the Eagle automatically starts new
TWA and PEAK reading collection at start up.
With Lunch Break ON, the RESUME screen displays during start up.
From this screen, you can choose to continue accumulating TWA and
PEAK readings from the last time the Eagle was used or start
collecting new readings.
1. From the main menu, select the LUNCH BREAK menu option.
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2. Press the AIR/ ▲ or SHIFT/ ▼ button to display the desired
setting.
3. Press the POWER/ ENTER button to enter the setting and return
to the main menu.
Updating the Alarm Latching Setting
With Alarm Latching ON, the Eagle remains in alarm condition until
the alarm condition passes and the RESET/ SILENCE is pressed.
With Alarm Latching OFF, the Eagle automatically resets its alarm
when the alarm condition passes.
1. From the main menu, select the ALARM LATCHING menu
option.
2. Press the AIR/ ▲ or SHIFT/ ▼ button to display the desired
setting.
3. Press the POWER/ ENTER button to enter the setting and return
to the main menu.
Updating the Alarm Silence Setting
NOTE: This feature works only when Alarm Latching is turned on.
With Alarm Silence ON, pressing the RESET/ SILENCE button
silences the buzzer when the Eagles goes into alarm. The LEDs
continue to flash, and the display continues to show the level of
alarm. When the gas concentration falls below the low alarm level,
pressing the RESET/ SILENCE button turns off the LEDs and removes
the ALM1 message.
With Alarm Silence OFF, you cannot silence the buzzer.
1. From the main menu, select the ALARM SILENCE menu option.
2. Press the AIR/ ▲ or SHIFT/ ▼ button to display the desired
setting.
3. Press the POWER/ ENTER button to enter the setting and return
to the main menu.
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Turning the User ID Function On or Off
With User ID Input ON, the User and Station ID screen displays
during start up. From this screen, you can enter user, location, or other
information at the beginning of each gas detection session (see
page 19).
With User ID Input OFF (default), the User and Station ID screen
does not display during start up.
1. From the main menu, select the USER ID menu option.
2. Press the AIR/ ▲ or SHIFT/ ▼ button to display the desired
setting.
3. Press the POWER/ ENTER button to enter the setting and return
to the main menu.
Updating the Auto Calibration Settings
The Eagle stores default calibration settings. This allows you to
calibrate all Eagle channels simultaneously with a calibration cylinder
that contains all required target gases (for example the RKI four-gas
calibration cylinder).
The Eagle includes default auto calibration settings for most target
gases. For gases without default auto calibration, the setting is 0.
NOTE: You can also update auto calibration settings in Calibration
mode. If you update auto calibration settings in Calibration
mode, you must continue with the calibration procedure.
Updating these settings in Setup mode allows you to update
the settings without calibrating the sensors.
1. From the main menu, select the AUTO CALIBRATION menu
option. (To display the combustible gas channel in PPM, press the
LEL/ PPM button.)
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2. Press and hold the SHIFT/ ▼ button, then press the DISP/ ADJ
button. The Auto Calibration screen for the combustible gas
channel displays.
3. Press the AIR/ ▲ or SHIFT/ ▼ button to display the desired
setting.
4. Press the POWER/ ENTER button to enter the new setting. The
Auto Calibration screen for the next channel displays.
5. Repeat steps 4 and 5 for the remaining channels. (You must scroll
through all remaining channels before you can exit the Auto
Calibration screen.)
6. When the Auto Calibration screen for the last channel displays,
press the POWER/ ENTER button to return to the main Auto
Calibration screen.
7. Press the POWER/ ENTER button to return to the main menu.
Updating the Back Light Setting
This setting indicates the length of time the LCD illuminates when
you press any button. The minimum setting is off; the maximum
setting is 10 minutes. The default setting is 15 seconds.
1. From the main menu, select the LCD BACK LIGHT TIME menu
option.
2. Press the AIR/ ▲ and SHIFT/ ▼ buttons to display the desired
setting.
3. Press the POWER/ ENTER button to enter the setting and return
to the main menu.
Turning the Auto Fresh Air Function On or Off
WARNING: If Auto Fresh Air Adjust is ON, you must start the Eagle
in a “fresh-air” environment. If this setting is ON and
the Eagle is started in the presence of a target gas, the
readings and alarms will not be accurate or reliable.
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With Auto Fresh Air Adjust ON, the Eagle automatically set the fresh
air reading for all channels during the start-up sequence.
With Auto Fresh Air Adjust OFF (default), you must press the AIR/ ▲
button to set the fresh air reading for all channels.
1. From the main menu, select the AUTO FRESH AIR ADJ. menu
option.
2. Press the AIR/ ▲ or SHIFT/ ▼ button to display the desired
setting.
3. Press the POWER/ ENTER button to enter the setting and return
to the main menu.
Updating the Interval Time Setting (data log option)
This setting indicates how often the Eagle records readings into the
Data Logger. The minimum setting is 10 seconds; the maximum
setting is 5 minutes. The default setting is 5 minutes.
1. From the main menu, select the INTERVAL TIME menu option.
2. Press the AIR/ ▲ and SHIFT/ ▼ buttons to display the desired
setting.
3. Press the POWER/ ENTER button to enter the setting and return
to the main menu.
Updating Log Data Over Write Setting (data log option)
With Data Over Write ON, the Eagle writes over the oldest data with
new data when the Data Logger memory is full.
With Data Over Write OFF, the Eagle stops writing data when the
Data Logger memory is full.
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1. From the main menu, select the LOG DATA OVER WRITE menu
option.
2. Press the AIR/ ▲ or SHIFT/ ▼ button to display the desired
setting.
3. Press the POWER/ ENTER button to enter the setting and return
to the main menu.
Updating the Time Calibration Setting (data log option)
This setting indicates how often the Eagle alerts you to needed
calibration. The minimum setting is 1 day; the maximum setting is 180
days. The default setting is “off”.
Tip: Press and hold the AIR/ ▲ or SHIFT/ ▼ button to rapidly scroll
through settings.
1. From the main menu, select the TIME CALIBRATION menu
option.
2. Press the AIR/ ▲ and SHIFT/ ▼ buttons to display the desired
setting.
3. Press the POWER/ ENTER button to enter the setting and return
to the main menu.
Updating the Date and Time Settings (data log option)
The Data Logger uses the data and time to identify entries.
1. From the main menu, select the DATE/TIME menu option.
2. Press the AIR/ ▲ or SHIFT/ ▼ button to display the desired
month.
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3. Press the POWER/ ENTER button to enter the setting. The day
setting flashes.
4. Repeat steps 2 and 3 to enter the day, year, hours, and minutes
settings. The main menu displays after you enter the minutes
setting.
Updating the Zero Follow Settings
The Zero Follow setting is not intended for customer setup. The
default setting for most target gases is ON. The default setting for
carbon dioxide sensors and some configurations of non-standard toxic
gas sensors is OFF. The oxygen sensor does not include this feature.
CAUTION:Contact RKI, Instruments Inc., before changing this setting.
Updating the Confirmation Beep Setting
With Confirmation Beep ON, the Eagle beeps once every 15 minutes
to verify that it is operating.
With Confirmation Beep OFF (default), the Eagle does not sound a
confirmation beep.
1. From the main menu, select the CONFIRMATION BEEP menu
option.
2. Press the AIR/ ▲ or SHIFT/ ▼ button to display the desired
setting.
3. Press the POWER/ ENTER button to enter the setting and return
to the main menu.
Returning to Default Settings
Each of the parameters in Setup mode has a default setting. The Eagle
includes three different options for returning default settings: reset all
default settings, reset the default alarm point settings only, and reset
the default oxygen zero setting only.
CAUTION:If you reset all default settings, any changes made in setup
mode or normal operation, including calibration settings, will be
lost.
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To reset all default settings:
1. From the main menu, select the DEFAULT menu option.
2. Press the POWER/ ENTER button to display the Set Default All
screen.
3. Press the AIR/ ▲ button to reset all parameters to their default
settings. The messages SAVING DATA and END display, then the
main menu displays.
To reset all default alarm point settings:
1. From the main menu, select the DEFAULT menu option. The Set
Default All screen displays.
2. Press the DISP/ ADJ button to display the Set Default Alarm
screen.
3. Press the AIR/ ▲ button to reset all alarm points to their default
settings. The messages SAVING DATA and END display, then the
main menu displays.
To reset the oxygen zero setting:
1. From the main menu, select the DEFAULT menu option. The Set
Default All screen displays.
2. Press the DISP/ ADJ button. The Set Default Alarm screen
displays.
3. Press the DISP/ ADJ button to display the Set Default Oxygen
Zero screen.
4. Press the AIR/ ▲ button to reset the oxygen zero setting to its
default value. The messages SAVINGDATAand END display, then
the main menu displays.
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Calibration
Calibrate the Eagle when you replace a sensor. Also calibrate the Eagle
periodically to assure proper sensor response.
You can program the Eagle to notify you when it is due for calibration
(see “Updating the Time Calibration Setting” on page 38). The
frequency of calibration depends upon the amount and type of use. A
typical calibration frequency is once per month.
Calibration Supplies and Equipment
To calibrate the Eagle, you need:
• Known calibrating samples of combustible and the appropriate
toxic gases. The samples should have concentrations in
approximately the middle of the range of detection.
• An oxygen-free source, such as 100% nitrogen or CO in a nitrogen
balance
• A demand-flow regulator to provide adequate sample gas flow
For one-source, auto-calibration, you can use the RKI Four-Gas
Cylinder to adjust all the sensors at the same time, automatically, with
no need for a zero-oxygen source. This section includes instructions
for calibration with the demand-flow regulator and RKI Four-Gas
Cylinder. This section also includes instructions for calibration with
individual gas sources.
Preparing for Calibration
1. Take the Eagle to a non-hazardous location with fresh-air
conditions.
2. Turn on the Eagle and allow one minute for warm up.
3. Press and hold the AIR/ ▲ button until a tone sounds.
The Eagle automatically sets the combustible gas and toxics
circuits to zero and the oxygen circuit to 20.9%.
4. Screw the regulator to the calibration cylinder.
5. Connect the calibration tubing to the regulator.
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Calibrating the Eagle
Press and hold the SHIFT/ ▼ button, then press the DISP/ ADJ button.
The Calibration menu displays.
NOTE: The following screens illustrate a four-gas Eagle with the data
logging option and are intended as examples only. Your Eagle
may display slightly different screens.
The Eagle’s Calibration menu includes two methods of calibration:
Auto Calibration and Single Calibration.
• Auto Calibration: This method allows you to calibrate all four
sensors simultaneously. It is designed for use with the RKI Four-
Gas Calibration Cylinder and is the quickest and easiest method to
calibrate the Eagle.
• Single Calibration: This method allows you to calibrate one sensor
at a time. Use this method if you are only calibrating one or two
sensors, if you are calibrating non-standard toxic sensors, or if you
are not using the RKI Four-Gas Calibration Cylinder.
Calibrating with the Auto Calibration method
This section describes calibration using the Auto Calibration method.
To calibrate using the Single Calibration method, see “Calibrating
with the Single Calibration method” on page 44.
1. Use the AIR/ ▲ and SHIFT/ ▼ button to place the prompt next to
the AUTO CALIBRATION menu option.
2. Press the POWER/ ENTER button to display the Calibration
Values screen.
The gas concentrations displayed in the Calibration Values screen
must match the gas concentrations listed on the Four-Gas Calibration
Cylinder. If all concentrations match, go to step 7. If one or more
concentrations do not match, continue with step 3.
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3. To adjust the values on the screen, hold down the SHIFT/ ▼
button, and press the DISP/ ADJ button. The Auto Calibration
screen for the combustible gas channel displays.
4. Use the AIR/ ▲ (increase) and SHIFT/ ▼ (decrease) buttons to set
the correct combustible gas value.
5. Press the POWER/ ENTER button to enter the new setting. The
Auto Calibration screen for the next channel displays.
6. Repeat steps 4 and 5 to set the correct values for the remaining
channels and return to the Calibration Values screen.
NOTE: The RKI Four Gas Cylinder contains approximately 12% O
2
by volume. Be sure to set the “OXY” reading to agree with the
concentration listed on the cylinder’s label, not zero.
7. With the Calibration Values screen displayed, press the
POWER/ ENTER button. The gas readings flash.
8. Connect the tubing from the regulator to the Eagle’s probe.Wait
approximately 1 minute or until the readings stabilize.
9. Press the POWER/ ENTER button to set the calibration to the
programmed values.
If a sensor(s) cannot calibrate to the proper value, FAIL PUSH AIR
KEY displays and the Eagle lists the sensor(s) that failed to
calibrate. (The other sensors calibrate normally.) The buzzer and
alarm lights activate. Press the AIR/ ▼ button to reset the alarm
and return to the Calibration menu. Replace the failed sensor(s),
then repeat calibration.
10. AUTO CALIBRATION END displays, then the Calibration menu
displays.
11. Disconnect the tubing from the probe.
12. Unscrew the regulator from the calibration cylinder.
13. Press the SHIFT/ ▼ button to place the prompt next to the
NORMALOPERATION menu option, then press the
POWER/ ENTER button to return to the normal screen.
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Calibrating with the Single Calibration method
This section describes calibration using the Single Calibration method.
To calibrate using the Auto Calibration method, see “Calibrating with
the Auto Calibration method” on page 42.
CAUTION:The single calibration method does not have a “FAIL”
notification. Replace sensors that cannot be set to agree with the
calibration source, then recalibrate.
1. Use the AIR/ ▲ and SHIFT/ ▼ buttons to place the prompt next to
the SINGLE CALIBRATION menu option.
2. Press the POWER/ ENTER button to display the Single Calibration
menu.
3. Use the AIR/ ▲ or SHIFT/ ▼ button to place the prompt next to
the channel to calibrate (in this example the combustible gas
channel).
4. Press the POWER/ ENTER button. The Single Calibration screen
displays for the channel you selected. The gas reading flashes.
5. Connect the tubing from the regulator to the Eagle’s probe.
NOTE: The combustible gas sensor is a general hydrocarbon sensor
that responds to most flammable vapors and gases; the
response will vary depending upon the substance. For best
results, calibrate the Eagle to the target gas or vapor.
6. If necessary, use the AIR/ ▲ (increase) and SHIFT/ ▼ (decrease)
buttons to adjust the reading to match the concentration listed on
the calibration cylinder.
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7. Press the POWER/ ENTER button to set the span value. SINGLE
CALIBRATION END displays, then the Single Calibration menu
displays.
8. Disconnect the tubing from the probe.
9. Repeat steps 3 through 8 for any other channels you want to
calibrate. Make sure you use an appropriate calibration cylinder
for each channel.
CAUTION:When calibrating the oxygen channel, verify the concentration
of oxygen listed on the cylinder’s label. For oxygen-free samples
(100% nitrogen for example), set the oxygen span setting to
0.0%.
10. After the last channel is calibrated, disconnect the calibration
tubing from the probe, then unscrew the regulator from the
calibration cylinder.
11. With the Single Calibration menu displayed, press the SHIFT/ ▼
button until the prompt is next to the last channel, then press the
SHIFT/ ▼ button again. The ESCAPE message displays.
12. Press the POWER/ ENTER button to return to the Calibration
menu.
13. Press the SHIFT/ ▼ button to place the prompt next to the
NORMAL OPERATION menu option, then press the POWER/
ENTER button to return to the normal screen.
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Maintenance
Displaying the Battery Voltage
Check the battery voltage periodically. Replace or recharge the
batteries before the voltage drops to 4.5 V.
WARNING: Take the Eagle to a non-hazardous location before
replacing or recharging the batteries.
To display the battery voltage:
1. From the normal screen, press the DISP/ ADJ button to enter
display mode.
2. Press the DISP/ ADJ button until the Battery Voltage screen
displays.
3. To exit display mode, press the DISP/ ADJ button until the normal
screen displays.
Replacing Alkaline Batteries
1. Turn off the Eagle.
2. Unscrew the two large screws on the top of the case, then carefully
lift the top of the case and lay it aside.
3. Remove the batteries and verify that the battery compartment and
electrical contacts are clean.
4. Insert fresh batteries following the label on the inside of the case.
5. Place the top of the case in its original position, then secure it with
the large screws you loosened in step 1.
Recharging Ni-Cd Batteries
1. Turn off the Eagle.
2. Plug the cord from the charger into the Eagle’s battery charger
connector.
3. Plug in the AC line cord or 12 VDC supply to the charger. A full
charge takes approximately 8 to 12 hours.
4. Unplug the supply and the charger before using the Eagle. See the
charger label for directions.
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NOTE: Setup mode allows you to select between alkaline and Ni-Cd
batteries. The two types of batteries have unique low battery
alarm characteristics. To prevent unexpected low battery
alarms, always make sure the battery type setting in Setup
mode matches the type of batteries installed in the Eagle.
Replacing Sensors
Electrochemical sensors (O , H S, and CO) gradually deteriorate,
2
2
regardless of use, and require periodic replacement. Combustibles
sensor life is typically related to usage, but certain conditions may
affect duration.
The Eagle sensors are easy to replace but do not contain user-
serviceable components. For genuine RKI sensors, call RKI or your
local distributor. All sensors are covered by a limited warranty; see
warranty for details.
CAUTION:Avoid pulling on sensor wires. Always unplug at the connector.
Replacing the combustibles sensor
Replace the combustibles sensor when:
• The combustibles channel cannot be calibrated correctly.
• The LEL reading cannot be set to 0 by the Demand Zero command.
To replace the combustibles sensor:
1. Take the Eagle to a non-hazardous location, and turn the power
off.
2. Unscrew the two large screws on the top of the case, then carefully
lift the top of the case and lay it aside.
3. Unplug the four-wire connector (red/ white/ green/ black) from
the circuit board.
4. Locate the combustibles sensor. With the batteries closest to you,
the combustibles sensor is at the top left corner of the sensor block.
5. Remove the two screws in the oval keeper plate, and remove the
sensor from the sensor block.
6. Unplug the cable socket from the top of the sensor. Retain the oval
keeper plate for use with the replacement sensor.
7. Install the replacement sensor in reverse order.
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Replacing the oxygen sensor
Replace the oxygen sensor when:
• The O channel cannot be set to 00.0% on an oxygen-free sample.
2
• The O display cannot be set to 20.9% by the Demand Zero
2
command.
• The O reading drifts noticeably. For example, if the O reading
2
2
varies from 20.5 to 21.5 while you view the display for a few
seconds.
To replace the oxygen sensor:
1. Take the Eagle to a non-hazardous location, and turn the power
off.
2. Unscrew the two large screws on the top of the case, then carefully
lift the top of the case and lay it aside.
3. Locate the oxygen sensor. With the batteries closest to you, the
oxygen sensor is at the bottom left corner of the sensor block.
4. Unplug the cable leading from the oxygen sensor at the large
multi-pin connector.
5. Loosen the screws on the metal strap that covers the oxygen
sensor.
6. Push the strap toward the screw that is furthest away from the
battery compartment.
7. Swing the strap aside.
8. Remove the oxygen sensor.
9. Install the replacement sensor in reverse order.
Replacing the H2S or CO sensor
Replace the H S or CO sensor when:
2
• The H S or CO channel cannot be calibrated correctly.
2
• The H S or CO reading cannot be set to 00 by the Demand Zero
2
command.
NOTE: Allow up to 1/ 2 hour after you replace the H S or CO sensor,
2
or if charged batteries have not been installed for an extended
period, for the channel to show a normal response, then
calibrate the sensor.
48 • Maintenance
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To replace the H S or CO sensor:
2
1. Take the Eagle to a non-hazardous location, and turn the power
off.
2. Unscrew the two large screws on the top of the case, then carefully
lift the top of the case and lay it aside.
3. Locate the toxic gas sensor you intend to replace. With the
batteries closest to you, the sensor for Channel 3 is at the top right
corner of the sensor block, and the sensor for Channel 4 is at the
bottom right corner of the sensor block. Note the color of the leads
extending from the sensor you intend to replace.
4. Unplug the appropriate sensor connector from the circuit board.
Use the color of the leads to determine the appropriate connector.
5. Remove the sensor from the sensor block. If necessary, wiggle the
sensor to work it out of the seal.
6. Install the replacement sensor in reverse order.
CAUTION:Verify that you install the H S or CO sensor in the appropriate
2
flow block position. The Eagle will display inaccurate H S and
2
CO readings if the sensors are not installed in the correct flow
block positions.
The Eagle continues to display H S and CO readings in the
2
same channels as it did previously regardless of which socket
(EC1 or EC2) the sensor is wired to or into which flow block
position the sensor is installed. However, the H S and CO
2
reading will be inaccurate due to the charcoal filter installed
before the CO flow block position.
Eagle Instruction Manual
Maintenance • 49
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Appendix A: Parts List
Table 6 lists part numbers for the Eagle’s replacement parts and
accessories.
Table 6: Parts List
Part Number
Description
13-0100RK
20-0640RK
20-0642RK
30-0600RK-01
33-0156RK-01
33-0160RK
33-6091RK
35-0110RK
35-0111RK
35-0112RK
49-1140RK
49-1240RK
49-2149RK
49-2150RK
49-2151RK
49-2152RK
49-2153RK
52-0206RK
52-2034RK
52-2035RK
57-0012RK
62-0125RK
65-0601RK
65-2005RK
65-2035RK
71-0028RK
Shoulder strap
Carrying case (for Eagle and standard accessories)
Carrying case (for Eagle, standard accessories, and calibration kit)
Pump
Filter element (for hydrophobic filter; pack of 5)
Filter, internal dust filter
Filter, charcoal filter
Dummy sensor, toxic gas sensor position
Dummy sensor, oxygen sensor position
Dummy sensor, combustible gas sensor position
Alkaline battery, D-size (total of 4 required)
Ni-Cd battery, D-size (total of 4 required)
Battery charger, 220 VAC
Battery charger, 115 VAC (with alkaline battery recognition)
Battery charger, 12 VDC (with cigarette lighter plug)
Continuous operation adapter, 115 VAC (with 20-foot cable)
Continuous operation adapter, 12 VDC (with cigarette lighter plug)
Lapel buzzer
Remote audible alarm (with 20-foot cable)
Remote audible alarm and strobe light (with 20-foot cable)
Datalogging board (also requires 82-5007RK)
Sensor, combustible gas (hydrocarbon)
Sensor, oxygen
Sensor, carbon monoxide
Sensor, hydrogen sulfide
Eagle Instruction Manual
50 • Appendix A: Parts List
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Table 6: Parts List (cont.)
Part Number
Description
80-0131RK
80-0132RK
80-0505RK
81-0154RK-02
Probe, 10-inch hydrophobic (standard probe)
Probe, 10-inch hydrophobic (for non-standard toxic gas sensors)
Hose, 5-foot polyurethane (standard hose)
Calibration cylinder for demand-flow regulator kit, 58L;
four-gas (CH ; O ; CO; H S)
4
2
2
81-1054RK
82-5007RK
Regulator, demand-flow type (for 58- and 103-liter calibration
cylinders)
Datalogging software and cable (also requires 57-0012RK)
Eagle Instruction Manual
Appendix A: Parts List • 51
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Appendix B: Methane Elimination
For applications where methane is an interfering gas, you can set the
Eagle to eliminate most response to methane. The methane
elimination switch is a standard feature on the circuit board inside the
top of the Eagle’s case. An external switch is available as an option. For
this type of detection, the combustible gas channel must be
programmed to display HEX or *** (see “Updating Channel Settings”
on page 25.) Eagles with the external methane elimination switch are
factory-set with the correct display.
Setting up for methane elimination mode
1. Take the Eagle to a fresh-air environment. Set the internal methane
elimination switch to the HEX ON position or the external switch
to Methane Response Off.
CAUTION:If the Eagle is equipped with an external methane elimination
switch, do not adjust the internal switch. The internal switch
should always be in the CH4 position.
2. Allow 2 minutes for the combustibles sensor to stabilize.
3. Perform the demand zero procedure as described in “Preparing
for Calibration” on page 41.
WARNING: DO NOT adjust the switch after re-zeroing the Eagle.
Response to CH is greatly reduced when the internal
4
switch is set to “HEX ON” or the external switch is set
to “Methane Response Off”. If used for methane
detection, the internal switch must be set to “CH4” or
the external switch set to “Methane Response On”.
Operating with methane response off
Monitor for combustible gas as you normally would. When the Eagle
is operating in Methane Elimination mode, response to methane is
reduced by 90% or more. Response to hexane is reduced slightly
(approximately 15%). To convert readings for most common
combustible gases, see Table 7 on page 53.
Returning to methane response mode
1. Take the Eagle to a fresh-air environment. Set the internal methane
elimination switch to the CH4 position or the external switch to
Methane Response On.
52 • Appendix B: Methane Elimination
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2. Allow 2 minutes for the combustibles sensor to stabilize.
3. Perform the demand zero procedure as described in “Preparing
for Calibration” on page 41.
Monitoring combustible gases other than hexane
Use Table 7 to determine the concentration of combustible gases other
than hexane. This table is based on Eagle’s in methane elimination
mode (methane elimination switch set to HEX ON) and calibrated to
hexane. Multiply the display reading by the factor in the appropriate
column. For example, if you are using the Eagle to detect toluene and
the display reads 10% LEL, the actual toluene reading is 10% x 0.90 =
9% LEL toluene.
To determine the concentration of other combustible gases with the
Eagle in full response mode, see Table 4 on page 12.
Table 7: Methane Elimination Mode Conversion Factors (Hexane Calibration)
LEL Factor
(Hexane Calibration)
PPM Factor
(Hexane Calibration)
Target Gas
Benzene
Ethane
0.90
Low response
0.75
0.98
Low response
2.25
Ethanol
Ethylene
Hexane
Hydrogen
IPA
0.53
0.57
1.00
1.00
0.55
2.00
0.98
1.77
Isobutane
MEK
0.74
1.21
0.91
1.49
Methane
Methanol
Propane
Propylene
Toluene
No response
0.91
No response
4.56
Low response
0.69
Low response
1.26
0.90
0.98
WARNING: The Eagle’s alarms are initiated by the DISPLAY reading
not the FACTORED reading. If you are monitoring for
toluene as in the above example and the low alarm is set
for 10% LEL, the Eagle will initiate a low alarm at 9%
LEL toluene (display reading of 10% LEL).
Eagle Instruction Manual
Appendix B: Methane Elimination • 53
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Appendix C: Non-Standard Toxic Gas Sensors
Appendix C describes the Eagle’s non-standard, electrochemical toxic
gas sensors. This appendix also offers information for calibrating and
replacing non-standard toxic gas sensors. Non-standard electro-
chemical toxic gas sensors are toxic gas sensors other than CO or H S.
2
Specifications
Table 8 lists specifications for the non-standard toxic gas sensors. The
alarm settings are user-adjustable (see “Updating the Alarm Point
Settings” on page 32.)
Table 8: Non-Standard Toxic Gas Sensors Specifications
TWA
Alarm
STEL
Alarm
Target Gas
Range
Alarm 1
Alarm 2
Ammonia
Arsine
0 to 75.0 ppm
0 to 1.00 ppm
0 to 200 ppb (1)
0 to 3.00 ppm
0 to 5.00 ppm
0 to 15.0 ppm
12.0 ppm 25.0 ppm 25.0 ppm 35.0 ppm
0.05 ppm 0.10 ppm 0.05 ppm
50 ppb 100 ppb 50 ppb
OFF
OFF
Arsine
Chlorine
Fluorine
0.50 ppm 1.50 ppm 0.50 ppm 1.00 ppm
0.50 ppm 1.00 ppm 1.00 ppm 2.00 ppm
Hydrogen
chloride
2.0 ppm
5.0 ppm
OFF
OFF
Hydrogen
fluoride
0 to 9.00 ppm
1.00 ppm 2.00 ppm 1.00 ppm 2.00 ppm
Nitric oxide
Nitrogen dioxide
Ozone
0 to 100 ppm
0 to 15.0 ppm
0 to 1.00 ppm
0 to 1.00 ppm
0 to 15.0 ppm
0 to 15.0 ppm
10 ppm
1.0 ppm
25 ppm
3.0 ppm
25 ppm
3.0 ppm
50 ppm
5.0 ppm
0.10 ppm 0.30 ppm 0.08 ppm 0.10 ppm
0.10 ppm 0.30 ppm 0.30 ppm 1.00 ppm
Phosphine
Silane
2.0 ppm
1.0 ppm
5.0 ppm
2.0 ppm
5.0 ppm
2.0 ppm
5.0 ppm
5.0 ppm
Sulfur dioxide
1 (1) ppb (parts per billion)
Description
Non-standard toxic gas sensors are mounted in the front half of the
instrument case. These sensors each include a dedicated amplifier
with ZERO and SPAN controls. A bracket secures the sensor/
amplifier assembly to the instrument case. A flow adapter connected
54 • Appendix C: Non-Standard Toxic Gas Sensors
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to the sensor allows the sample to flow through the non-standard
toxic gas sensor. A seven-position connector plugs into the EC3
(channel 3) or EC4 (channel 4) socket on the analog PCB.
CAUTION:Eagle’s equipped with non-standard toxic gas sensors include a
special inlet fitting that requires a Teflon sample hose. Using a
standard sample hose for these applications may result in
inaccurate gas readings.
Calibrating Non-Standard Toxic Gas Sensors
Recommended calibration frequency for non-standard toxics sensors
is 3 to 6 months. Use the Single Calibration method to calibrate non-
standard toxic gas sensors as described in the Calibration section of
this manual with the following exception.
1. At the Single Calibration screen, press the SHIFT/ ▼ button to
scroll down to the appropriate gas, then press the
POWER/ ENTER button.
2. Screw the regulator to the appropriate calibration cylinder.
3. Connect the tubing from the regulator to the Eagle’s probe. Allow
2 minutes for the reading to stabilize.
4. If necessary, use the AIR/ ▲ (increase) and SHIFT/ ▼ (decrease)
buttons to adjust the reading to match the concentration listed on
the calibration cylinder.
Go to the next section, “Adjusting the sensor potentiometers,” if
you are unable to match the reading to the concentration of the
cylinder.
5. Press the POWER/ ENTER button to set the span value. SINGLE
CALIBRATION END displays, then the Single Calibration menu
displays.
6. Disconnect the tubing from the probe.
7. Unscrew the regulator from the calibration cylinder.
8. With the Single Calibration menu displayed, press the SHIFT/ ▼
button until the prompt is next to the last channel, then press the
SHIFT/ ▼ button again. The ESCAPE message displays.
9. Press the POWER/ ENTER button to return to the Calibration
menu.
10. Press the SHIFT/ ▼ button to place the prompt next to the
NORMAL OPERATION menu option, then press the POWER/
ENTER button to return to the normal screen.
Eagle Instruction Manual
Appendix C: Non-Standard Toxic Gas Sensors • 55
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Adjusting the sensor controls
CAUTION:Only perform the following steps if you are unable to set the
correct calibration reading with the AIR/▲ and SHIFT/▼
buttons.
1. Use the AIR/ ▲ and SHIFT/ ▼ buttons to set the reading to the
middle of the range in which you can currently adjust the reading.
For example, if you can set the reading from a minimum of 1.0
ppm to a maximum of 3.0 ppm, set the display to 2.0 ppm.
2. Unscrew the two large screws on the top of the case, then carefully
lift the top of the case and lay it aside.
3. Locate the sensor in the front half of the bottom case. The sensor
with wires connected to EC3 on the analog PCB displays its
reading on the third line of the screen. The sensor connected to
EC4 on the analog PCB displays its reading on the fourth line of
the screen.
4. Adjust the sensor’s SPAN control one turn and observe the
display reading. Continue to adjust the SPAN control until the
display reading matches the concentration of the calibration
cylinder.
The SPAN control is located next to the sensor on the side closest
to the front of the instrument.
5. Press the POWER/ ENTER button to set the span value. SINGLE
CALIBRATION END displays, then the Single Calibration menu
displays.
6. Place the top of the case in its original position, then secure it with
the large screws you loosened in step 2.
7. Disconnect the tubing from the probe, then unscrew the regulator
from the calibration cylinder.
8. With the Single Calibration menu displayed, press the SHIFT/ ▼
button until the prompt is next to the last channel, then press the
SHIFT/ ▼ button again. The ESCAPE message displays.
9. Press the POWER/ ENTER button to return to the Calibration
menu.
10. Press the SHIFT/ ▼ button to place the prompt next to the
NORMAL OPERATION menu option, then press the POWER/
ENTER button to return to the normal screen.
56 • Appendix C: Non-Standard Toxic Gas Sensors
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NOTE: If a non-standard toxics channel displays Zero Fail after the
Demand Zero procedure, adjust the ZERO control (next to
SPAN) until the reading displays the smallest increment
above 0.0. For example, 0.01 or 0.1. Repeat Demand Zero.
Replacing Non-Standard Toxic Gas Sensors
Replace the non-standard toxic gas sensor when:
• The toxic gas channel cannot be calibrated correctly.
• The toxic gas reading cannot be set to zero by the Demand Zero
command or zero potentiometer.
NOTE: RKI Instruments, Inc., recommends that you return the Eagle
for replacement of the non-standard toxic gas sensor. The
following procedure is provided to allow you to replace the
sensor if necessary.
1. Take the Eagle to a non-hazardous location, and turn the power
off.
2. Unscrew the two large screws on the top of the case, then carefully
lift the top of the case and lay it aside.
3. In the front half of the bottom case, locate the sensor you want to
replace. The sensor with wires connected to EC3 on the analog
PCB displays its reading on the third line of the screen. The sensor
connected to EC4 on the analog PCB displays its reading on the
fourth line of the screen.
4. Remove the two screws at the base of the bracket.
5. Lift the sensor assembly up enough to remove the flow adapter
(two screws). The flow adapter is attached to the sensor.
CAUTION:Avoid pulling on sensor wires. Always unplug at the connector.
6. Disconnect the connector from the analog PCB. Note to which
socket (EC3 or EC4) the connector is connected.
7. Remove the sensor assembly from the instrument case.
8. Remove the two screws that secure the sensor assembly to the
bracket.
9. Remove the two screws that secure the sensor to the amplifier,
then remove the sensor from the amplifier. Retain the amplifier for
use with the replacement sensor.
10. Install the replacement sensor in reverse order.
Eagle Instruction Manual
Appendix C: Non-Standard Toxic Gas Sensors • 57
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NOTE: Allow up to 4 hours after you replace a non-standard toxic
gas sensor, or if charged batteries have not been installed for
an extended period, for the channel to show a normal
response, then calibrate the sensor.
Parts List
Table 9 lists part numbers for replacement parts and accessories of the
Eagle’s non-standard toxic gas sensors.
Table 9: Parts List: Non-Standard Toxic Gas Sensors
Part Number
Description
06-1273RK
Tubing, 1/4 in. x 1/8 in. PTFE (order by foot; 3 ft. standard;
consult RKI Instruments, Inc., for lengths longer than 3 ft.)
81-0170RK-02
81-0175RK-02
81-0185RK-02
81-0190RK-02
Calibration cylinder, 58-liter (5 ppm SO -in-nitrogen)
2
Calibration cylinder, 58-liter 10 ppm NH -in-nitrogen)
3
Calibration cylinder, 58-liter (0.5 ppm PH -in-nitrogen)
3
Calibration cylinder, 58-liter (2 ppm Cl -in-nitrogen)
2
81-0195RK-02
ES-23A-NO
Calibration cylinder, 58-liter (5 ppm HCl-in-nitrogen)
Sensor, nitric oxide
ES-23AH-ASH3
Sensor, arsine (0 to 1.00 ppm range)
ES-23AHS-ASH3 Sensor, arsine (0 to 0.20 ppm range)
ES-23AH-NO2
ES-23AH-O3
ES-23AH-PH3
ES-23AH-SIH4
ES-23E-SO2
ES-23R-NH3
ES-K233-CL2
ES-K233-F2
ES-K233-HCL
ES-K233-HF
ES-K233-O3
Sensor, nitrogen dioxide
Sensor, ozone (0 to 5.00 ppm range)
Sensor, phosphine
Sensor, silane
Sensor, sulfur dioxide
Sensor, ammonia
Sensor, chlorine
Sensor, fluorine
Sensor, hydrogen chloride
Sensor, hydrogen fluoride
Sensor, ozone (0 to 1.00 ppm range)
58 • Appendix C: Non-Standard Toxic Gas Sensors
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Appendix D: Carbon Dioxide Sensors
Appendix D describes the Eagle’s non-standard, infrared carbon
dioxide (CO ) sensors. It also offers additional information for
2
calibrating and replacing CO sensors.
2
Specifications
Table 10 lists specifications for the carbon dioxide sensors. The alarm
settings are user-adjustable (see “Updating the Alarm Point Settings”
on page 32.)
Table 10: Carbon Dioxide Sensor Specifications
Range
Alarm 1
Alarm 2
TWA Alarm
STEL Alarm
0 - 5000 ppm
0 - 10,000 ppm
0 - 5.00% CO2
0 - 20.0%
OFF
5000 ppm
0.50% CO2
OFF
OFF
OFF
OFF
5000 ppm
0.50% CO2
OFF
OFF
OFF
3.00% CO2
OFF
3.00% CO2
OFF
0 - 50.0%
OFF
OFF
OFF
OFF
Description
The Eagle uses an infrared sensor to detect carbon dioxide. The
carbon dioxide sensor includes a dedicated amplifier with ZERO and
SPAN controls. A bracket secures the sensor/ amplifier assembly to
the instrument case. A four-position connector plugs into the EC3
(channel 3) or EC4 (channel 4) socket on the analog PCB.
A carbon dioxide scrubber is mounted to the exterior front of Eagles
that are factory-shipped with carbon dioxide sensors for the ranges 0 -
5,000 ppm, 0 - 10,000 ppm, and 0 - 5%.
NOTE: Eagles with a range of 0 - 20% and 0 - 50% CO do not include
2
a scrubber since the normal background of CO in air is
2
negligible when compared to the full scale of these units.
This scrubber is for use when setting the carbon dioxide sensor’s zero
reading only. Replace the scrubber when it turns from white to a violet
color.
CAUTION: Do not connect the probe to the scrubber during normal
operation or when setting the span reading during calibration.
Eagle Instruction Manual
Appendix D: Carbon Dioxide Sensors • 59
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Normal Operation of Carbon Dioxide Sensors
Carbon dioxide is a background gas in fresh air. Table 11 indicates
typical gas readings for each of the Eagle’s carbon dioxide sensors.
Table 11: Carbon Dioxide Fresh Air Readings
Approximate
Range
Fresh Air Reading
0 - 5000 ppm
0 - 10,000 ppm
0 - 5.00%
400 ppm
400 ppm
0.04%
0 - 20.0 & 0 - 50.0%
0.0%
Demand Zero for Carbon Dioxide Sensors
When setting the zero reading, the carbon dioxide scrubber mounted
to the front of the Eagle allows you to eliminate carbon dioxide
normally found in fresh air.
NOTE: When performing a demand zero with a 0 - 20% or 0 - 50%
CO unit, the use of a scrubber is not required.
2
1. Connect the carbon dioxide scrubber directly to the Eagle’s inlet
fitting.
2. Wait one minute for the fresh air sample to flow through the
carbon dioxide scrubber, then press the AIR/ ▲ button to set the
zero reading.
If the carbon dioxide sensor fails when you press the AIR/ ▲
button, use the zero control (marked F. ZERO) on the amplifier to
adjust the reading to zero.
CAUTION:Do not adjust the coarse zero potentiometer (marked C.ZERO).
3. Remove the tubing from the carbon dioxide scrubber and probe.
Calibrating Carbon Dioxide Sensors
Recommended calibration frequency for carbon dioxide sensors is
once every 3 months. Enter Calibration mode and calibrate carbon
dioxide sensors as described in the Calibration section of this manual.
Use the Auto Calibration method if a calibration cylinder is available
that includes all target gases for your Eagle. Use the Single Calibration
method if you are using a carbon dioxide calibration cylinder.
60 • Appendix D: Carbon Dioxide Sensors
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NOTE: If you are using the Auto Calibration method, go the
Calibration Values screen, verify that the carbon dioxide
value matches the concentration of carbon dioxide in the four-
gas calibration cylinder, then proceed with step 2.
1. At the Single Calibration screen, press the SHIFT/ ▼ button to
scroll down to the carbon dioxide channel, then press the
POWER/ ENTER button.
2. Screw the regulator to the appropriate calibration cylinder.
3. Connect the tubing from the regulator to the Eagle’s probe. Allow
1 minute for the reading to stabilize.
4. If necessary, use the AIR/ ▲ (increase) and SHIFT/ ▼ (decrease)
buttons to adjust the carbon dioxide reading to match the
concentration listed on the calibration cylinder.
Go to the next section, “Adjusting the sensor potentiometers,” if
you are unable to match the reading to the concentration of the
calibration cylinder.
5. Press the POWER/ ENTER button to set the span value. SINGLE
CALIBRATION END displays, then the Single Calibration menu
displays.
6. Disconnect the tubing from the probe, then unscrew the regulator
from the cylinder.
7. With the Single Calibration menu displayed, press the SHIFT/ ▼
button until the prompt is next to the last channel, then press the
SHIFT/ ▼ button again. The ESCAPE message displays.
8. Press the POWER/ ENTER button to return to the Calibration
menu.
9. Press the SHIFT/ ▼ button to place the prompt next to the
NORMAL OPERATION menu option, then press the POWER/
ENTER button to return to the normal screen.
Adjusting the sensor controls
CAUTION:Only perform the following steps if you are unable to set the
correct calibration reading with the AIR/▲ and SHIFT/▼
buttons.
1. Use the AIR/ ▲ and SHIFT/ ▼ buttons to set the reading to the
middle of the range in which you can currently adjust the reading.
For example, if you can set the reading from a minimum of 1.00%
Eagle Instruction Manual
Appendix D: Carbon Dioxide Sensors • 61
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CO to a maximum of 3.00% CO , set the display to 2.00% CO .
2
2
2
2. Unscrew the two large screws on the top of the case, then carefully
lift the top of the case and lay it aside.
3. Locate the carbon dioxide sensor in the front half of the bottom
case. A sensor with wires connected to EC3 on the analog PCB
displays its reading on the third line of the screen. A sensor
connected to EC4 on the analog PCB displays its reading on the
fourth line of the screen.
4. Adjust the carbon dioxide sensor’s SPAN control one turn and
observe the display reading. Continue to adjust the SPAN control
until the display reading matches the concentration of the
calibration cylinder.
The SPAN control is located on the top edge of the amplifier and is
the control closest to the front of the instrument. (The front of the
instrument has the scrubber attached to it.)
5. Press the POWER/ ENTER button to set the span value. SINGLE
CALIBRATION END displays, then the Single Calibration menu
displays.
6. Place the top of the case in its original position, then secure it with
the large screws you loosened in step 5.
7. Disconnect the tubing from the probe.
8. Unscrew the regulator from the calibration cylinder.
9. With the Single Calibration menu displayed, press the SHIFT/ ▼
button until the prompt is next to the last channel, then press the
SHIFT/ ▼ button again. The ESCAPE message displays.
10. Press the POWER/ ENTER button to return to the Calibration
menu.
11. Press the SHIFT/ ▼ button to place the prompt next to the
NORMALOPERATION menu option, then press the
POWER/ ENTER button to return to the normal screen.
Replacing Carbon Dioxide Sensors
Return the Eagle to RKI Instruments, Inc., for replacement of the
carbon dioxide sensor when:
• The carbon dioxide channel cannot be calibrated correctly.
• The carbon dioxide reading cannot be set to zero by the Demand
Zero command or zero potentiometer.
62 • Appendix D: Carbon Dioxide Sensors
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Parts List
Table 12 lists part numbers for replacement parts and accessories of
the Eagle’s carbon dioxide sensors.
Table 12: Parts List: Carbon Dioxide Sensors
Part Number
Description
33-6010RK-01
81-0070RK-03
Scrubber, carbon dioxide
Calibration cylinder, 103-liter (2000 ppm CO )
2
81-0071RK-03
81-0072RK-03
81-0073RK-03
81-1054RK
Calibration cylinder, 103-liter (5000 ppm CO )
2
Calibration cylinder, 103-liter (2.5% CO )
2
Calibration cylinder, 103-liter (15% CO )
2
Regulator, demand-flow type (for 58- and 103-liter calibration
cylinders)
Eagle Instruction Manual
Appendix D: Carbon Dioxide Sensors • 63
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Appendix E: Infrared Methane Sensors
Appendix E describes the Eagle’s non-standard, infrared methane
sensor. This appendix also offers additional information for
calibrating and replacing the infrared methane sensor.
Target Gases
The infrared methane sensors are setup for and factory-calibrated to
methane. This section lists other combustible gases known to respond
and to not respond to the infrared methane sensor. Consult RKI
Instruments, Inc., for combustible gases not listed below.
The following combustible gases are also known to respond to the
infrared methane sensors.
• ethane
• hexane
• IPA
• isobutane
• MEK
• propane
• toluene
The following combustible gases are known to not respond or
respond poorly to the infrared methane sensor.
• acetylene
• hydrogen
• styrene
Specifications
Table 13 lists specifications for the infrared methane sensor. The alarm
settings are user-adjustable (see “Updating the Alarm Point Settings”
on page 32.)
Table 13: Infrared Methane Sensor Specifications
Range
Alarm 1
Alarm 2
TWA Alarm STEL Alarm
0 to 100% LEL CH
10% LEL
5000 ppm
50% LEL
25,000 ppm
N/A
N/A
N/A
N/A
4
PPM (1)
0 to100% Volume CH
10% VOL
20% VOL
N/A
N/A
4
(1) The PPM range for CH4 is 0 to 50,000 ppm.
64 • Appendix E: Infrared Methane Sensors
Eagle Instruction Manual
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Description
The infrared methane sensor is mounted in the front half of the
instrument case. The sensor is attached and wired to a dedicated
amplifier, which includes ZERO and SPAN controls. A bracket secures
the sensor/ amplifier assembly to the instrument case.
Eagles with an infrared methane sensor that has a 0 to 100% LEL
range do not include the standard catalytic combustible gas sensor. In
these models, the infrared methane sensor is wired to the EC4 socket
on the analog PCB and the gas reading is displayed in channel 1. This
sensor is also capable of measuring in the PPM range.
Eagles with an infrared methane sensor that has a 0 to 100% Volume
CH range may also include the standard combustible gas sensor.
4
Table 14 lists the sensor configuration for Eagles that include this
sensor. Not all channels may be active in your Eagle.
Table 14: Sensor Configuration for Infrared Methane Sensors
(0 to 100% Volume)
Channel
Sensor
Analog PCB Socket
1
2
Standard combustible gas (0 to 100% LEL)
COMB
EC4
Infrared methane (0 to 100% Vol. CH )
4
3
4
Oxygen
CN2
Toxic gas or infrared carbon dioxide
EC1, EC2, or EC3
Calibrating Infrared Methane Sensors
Recommended calibration frequency for the infrared methane sensor
is once every 3 months. Enter Calibration mode and calibrate the
infrared methane sensor using the same procedure as the standard
combustible gas sensor (see “Calibration” on page 41).
NOTE: The 0 to 100% Volume CH version of the infrared methane
4
sensor requires the use of a sample bag due to the type of
calibration cylinder used. See Table 15 on page 66 for ordering
information.
Adjusting the sensor controls
CAUTION:Only perform the following steps if you are unable to set the
correct calibration reading with the AIR/▲ and SHIFT/▼
buttons.
Eagle Instruction Manual
Appendix E: Infrared Methane Sensors • 65
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1. Use the AIR/ ▲ and SHIFT/ ▼ buttons to set the reading to the
middle of the range in which you can currently adjust the reading.
For example, if you can set the reading from a minimum of 10%
LEL to a maximum of 40% LEL, set the display to 25% LEL.
2. Unscrew the two large screws on the top of the case, then carefully
lift the top of the case and lay it aside.
3. Locate the infrared methane sensor in the front half of the bottom
case. It is connected to the EC4 socket on the analog PCB.
4. Adjust the sensor’s SPAN control one turn and observe the
display reading. Continue to adjust the SPAN control until the
display reading matches the concentration of the calibration
cylinder.
The SPAN control is on the top edge of the amplifier and is the
control closest to the front of the instrument.
5. Place the top of the case in its original position, then secure it with
the large screws you loosened in step 5.
6. Continue with the normal calibration procedure.
Replacing Infrared Methane Sensors
Return the Eagle to RKI Instruments, Inc., for replacement of the
infrared methane sensor when:
• The infrared methane channel cannot be calibrated correctly.
• The infrared methane reading cannot be set to zero by the Demand
Zero command.
Parts List
Table 15 lists part numbers for replacement parts and accessories of
the Eagle’s infrared 100% volume methane sensor.
Table 15: Parts List: Infrared Methane Sensors
Part Number
Description
81-0015RK-01
Calibration cylinder, 34-liter (50% volume CH )
4
81-1001RK
81-1126RK
81-1127RK
Dispensing valve (for 34-liter calibration cylinders)
Calibration sample bag, tedlar (9 in. x 9 in.)
Calibration sample bag, tedlar (12 in. x 12 in.)
66 • Appendix E: Infrared Methane Sensors
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Appendix F: Eagle Tank Tester Model
The Eagle Tank Tester model is intended for checking tanks or vessels
that may contain residual hydrocarbon vapors or water or may have
been purged of oxygen. You can also use this model as a standard
Eagle gas monitor by connecting the standard hose and probe and
updating the oxygen alarms to the default settings.
Description
The tank tester model has an additional socket on the front on the
housing to accommodate connection of the float probe assembly. This
model includes the following non-standard components.
Float probe assembly
The float probe assembly helps prevent liquid from being drawn into
the Eagle. The float probe assembly is 12-feet long. A quick disconnect
fitting at one end of the assembly connects to the Eagle’s inlet fitting.
The same end of the probe also includes a short wire that terminates
in a jack. This jack connects to the float probe socket that is adjacent to
the Eagle’s inlet fitting. The float probe switch at the opposite end of
the 12-foot cable shuts off the pump if the probe begins to be
submerged into a liquid.
To use the float probe assembly:
CAUTION:Drawing water, gasoline, or other liquids into the Eagle will
cause damage.
1. Attach the quick disconnect fitting to the Eagle’s standard inlet
fitting.
2. Attach the jack to the socket that is adjacent to the inlet fitting.
3. Lower the probe into the tank or vessel. Lower the probe very
slowly to allow the float switch to activate if necessary.
Eagle Instruction Manual
Appendix F: Eagle Tank Tester Model • 67
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Dilution fitting (1:1)
CAUTION:When measuring oxygen readings, remove the dilution fitting or
use your finger to seal the small dilution hole on the side of the
dilution fitting.
The standard combustible gas sensor requires oxygen to operate. In
environments where there is not enough oxygen to operate the
combustible gas sensor, (for example a tank purged with an inerting
gas), the 1:1 dilution fitting adds sufficient oxygen by blending
ambient air with the incoming sample. The standard dilution fitting
dilutes at a ratio of 1:1 (one part air to one part sample).
To attach the dilution fitting:
1. Attach the dilution fitting’s quick disconnect fitting to the Eagle’s
inlet fitting.
2. Attach the hose to the opposite end of the dilution fitting.
NOTE: When using the dilution fitting, multiply the combustible gas
reading (LEL or PPM) by 2 to determine the actual
combustible gas concentration. Always remove the dilution
fitting or seal the dilution hole to measure for oxygen.
Alarms
The Eagle Tank Tester model has two alarms for oxygen. They are
factory-set at 5.0% by volume (increasing) and 19.5% by volume
(decreasing).
The increasing alarm is used to monitor a purged vessel to alert you to
a rising oxygen condition. The decreasing alarm is generally used for
confined space entry to warn you of dangerously low breathing
levels.
ANY oxygen level is either above or below one of these alarm levels,
so the Eagle Tank Tester version will go into alarm when first turned
on. To silence the alarm, press the RESET button. The audible alarm
silences, but the alarm lights continue to flash and the display screen
continues to indicate an oxygen alarm. If one of the alarm levels is
newly exceeded, the audible alarm sounds again.
To eliminate an oxygen alarm that is not being used:
Either the increasing or decreasing oxygen alarm can be turned off in
Setup mode (see “Updating the Alarm Point Settings” on page 32.)
Turning off the alarm clears the alarm lights and display of an
unnecessary alarm.
68 • Appendix F: Eagle Tank Tester Model
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Calibration
Use a hexane calibrating source to calibrate the combustible gas LEL
range. Use a 100% nitrogen calibrating source to set the zero reading
for the oxygen channel. RKI Instruments, Inc., recommends using the
Single Calibration method to calibrate the Eagle Tank Tester model.
See “Calibration” on page 41.
Parts List
Table 16 lists part numbers for replacement parts and accessories of
the Eagle’s Tank Tester model.
Table 16: Parts List: Eagle Tank Tester Model
Part Number
Description
80-0405RK
80-0802RK
Dilution fitting (1:1)
Float probe (12-foot)
Eagle Instruction Manual
Appendix F: Eagle Tank Tester Model • 69
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Appendix G: Five-Gas and Six-Gas Models
Overview
The standard Eagle gas monitor includes one to four channels and
displays gas readings for all channels simultaneously. Some Eagle
models include five or six channels; however, the Eagle is only
capable of displaying gas readings for four of the channels at any one
time.
Five- and six-gas Eagle models include up to four sensors in the
standard sensor block. The additional sensor(s) are mounted in the
front half of the instrument case and are wired to sockets EC3
(channel 5) and EC4 (channel 6) on the analog PCB.
NOTE: The data logging accessory is not available for the Eagle’s
five- and six-gas models. This is also true for five- and six-gas
models with four or less active channels.
Displaying Additional Channels
The normal screen displays a cursor (>) at the far left to indicate that
additional channels can be displayed.
• A cursor to the left of the last channel displayed indicates that
additional channels are available after the currently displayed
channels. Press the SHIFT/ ▼ button to display the remaining
channels.
• A cursor to the left of the first channel displayed indicates that
additional channels are available before the currently displayed
channels. Press the AIR/ ▲ button to display the remaining
channels.
70 • Appendix G: Five-Gas and Six-Gas Models
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• Cursors to the left of the first and last channels displayed indicate
that additional channels are available before and after the currently
displayed channels. Press the AIR/ ▲ and SHIFT/ ▼ buttons to
display the remaining channels.
Alarms
If the Eagle recognizes an alarm condition for a non-displayed
channel, the cursor flashes and the standard audible and visual
alarms initiate.
• If the alarm occurs for a channel before the top displayed channel,
the cursor in the first line flashes. Press the AIR/ ▲ button to
display the channel in alarm.
• If the alarm occurs for a channel after the bottom displayed
channel, the cursor in the last line flashes. Press the SHIFT/ ▼
button to display the channel in alarm.
Calibration, Display, and Setup Modes
For screens in these modes that display all active channels, a cursor
displays:
• in the top line if channels are available before the top line. Press the
AIR/ ▲ button to display the additional channel(s).
• in the bottom line if channels are available after the bottom line.
Press the SHIFT/ ▼ button to display the additional channel(s).
• in the top and bottom lines if channels are available before the top
line and after the bottom line. Press the AIR/ ▲ and SHIFT/ ▼
buttons to display the additional channels.
Eagle Instruction Manual
Appendix G: Five-Gas and Six-Gas Models • 71
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Appendix H: Eagle Transformer Gas Tester Model
This Eagle Transformer Gas Tester Model is specially set up for
electrical transformer gas testing. Large electrical transformers are
filled with oil which surrounds the transformer coils, and they have
an inert gas head space above the oil. When a transformer begins to
fail, electrical arcing between the conductors of the coils can cause
flammable gases to form in the head space. By testing the head space
for these gases, and recording trends of the readings, an early warning
of transformer failure can be determined, and the transformer can be
removed from service before it explodes.
Description
This combustible sensor, which is a catalytic combustion type, is
calibrated to and the instrument is setup for hydrogen with a range of
0 - 5.00% volume. Since the headspace being tested is filled with
nitrogen, there is not oxygen in the test sample. The catalytic sensor
requires oxygen in order to operate, so the instrument is supplied
with a snap-on dilution fitting with a dilution ratio of 1:1 (one part air
to one part sample). This fitting blends the sample with ambient air
before entering the instrument, which provides sufficient oxygen for
the sensor to work. The instrument is also supplied with a sample
bag.
Operation
1. Turn instrument on and allow it to warm up.
2. Attach the dilution fitting directly to the front of the instrument,
and the plastic probe to the dilution fitting.
3. Press the “AIR” button in fresh air to zero the instrument.
4. Connect the deflated sample bag to the sample valve on the
transformer, and open the valve slightly to fill the sample bag.
Close off the sample bag and remove it from the transformer
valve.
5. Attach the sample bag to the EAGLE probe, and open the sample
bag.
The sample will now be drawn into the instrument. After about 45
seconds note and record the display reading. Compare this
reading to historical data to determine the condition of the
transformer.
72 • Appendix H: Eagle Transformer Gas Tester Model
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NOTE: The EAGLE can be calibrated either with or without the
dilution fitting in place. If calibrated without the dilution
fitting in place, then display readings must be doubled to
determine the actual gas concentration. If calibrated with the
dilution fitting in place, then the sample bag must be used
during calibration, and the display readings will be the actual
gas concentrations.
CAUTION:If the dilution fitting is in place for calibration, do not use a
demand flow regulator. Use a sample bag. The use of a demand
flow regulator with a dilution fitting when calibrating will
result in an inaccurate calibration.
Alarms
All the gas alarms on the Transformer Gas Tester are set to OFF.
Table 17: Parts List: Eagle Tank Tester Model
Part Number
Description
80-0405RK
81-1126RK
Dilution fitting (1:1)
Sample bag, 9” x 9”, tedlar
Eagle Instruction Manual
Appendix H: Eagle Transformer Gas Tester Model • 73
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Appendix I: Installing the Data Logger Board
Appendix H describes the procedure to install the Eagle’s data logger
board. The data logging feature is an optional accessory.
NOTE: Although the data logger board may be installed in the field,
RKI Instruments, Inc., recommends that you return the Eagle
to the factory for data logger board installation.
1. Take the Eagle to a non-hazardous location, and turn the power
off.
2. Unscrew the two large screws on the top of the case., then
carefully lift the top of the case and lay it aside.
3. Unplug the ribbon cable from the main circuit board in the top
case.
4. Remove the two screws, flat washers, and lock washers that hold
the main circuit board in the top case.
5. Slowly pull the main circuit board from the top case far enough to
allow room to install the Data Logger board. Avoid pulling so far
that you disconnect any of the four cables on the main circuit
board.
6. Plug the Data Logger board into the main circuit board at CN1A,
CN1B, CN1C, and CN1D.
7. Reassemble the main circuit board to the top case with the screws
and lock washers removed in step 4.
8. Plug in the ribbon cable.
9. Reassemble and secure the top case to the bottom case.
10. Start the Eagle and program the Data Logger functions as
described in “Setup Mode” on page 23.
74 • Appendix I: Installing the Data Logger Board
Eagle Instruction Manual
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