Omega Vehicle Security LDP63100 User Manual

Users Guide  
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LDP63100  
Extra Large Display  
LP0689X  
z LARGE LED DISPLAY READABLE TO 180 FEET  
z VARIOUS ANALOG INPUT MODULES;  
DC VOLTAGE AND CURRENT  
PROCESS SIGNALS  
TRUE RMS VOLTAGE AND CURRENT  
THERMOCOUPLE OR RTD  
STRAIN GAGE/BRIDGE  
U
R
C L US LISTED  
IND. CONT. EQ.  
51EB  
z ALARMS, ANALOG OUTPUT, AND COMMUNICATION  
z PROGRAMMABLE USER INPUTS  
z UNIVERSAL AC POWERED (85 to 250 VAC)  
z PROGRAMMING SOFTWARE  
z NEMA 4X/IP65  
GENERAL DESCRIPTION  
SPECIFICATIONS  
The LDP63100 is a versatile display that can increase productivity by  
offering the plant floor or production area a large visual display of their current  
status. Whether your measurement is voltage, current, process, temperature, or  
strain gage, the LDP63100 can satisfy your requirement. Plug-in option cards  
can add alarms, analog output, and communication/bus capabilities, making the  
LDP63100 a truly Intelligent Panel Meter.  
Input specifications, wiring, and programming information is contained in  
the corresponding literature shipped with the ordered model.  
1. DISPLAY: 4" (101 mm) Red LED  
5-Digit: -19999 to 99999  
2. POWER REQUIREMENTS:  
AC Input Modules: 85 to 250 VAC, 50/60 Hz, 18 VA  
LDP63100 Display: 85 to 250 VAC, 50/60 Hz, 10 VA  
3. ANNUNCIATORS:  
Display Indication: Three vertical dots on the left side of the unit identify  
the displays for the following modes:  
SAFETY SUMMARY  
All safety regulations, local codes and instructions that appear in this and  
corresponding literature, or on equipment, must be observed to ensure personal  
safety and to prevent damage to either the instrument or equipment connected  
to it. If equipment is used in a manner not specified by the manufacturer, the  
protection provided by the equipment may be impaired.  
TOP  
Maximum  
Minimum  
Total  
MIDDLE  
BOTTOM  
Setpoint Indication: Four vertical dots on the right side of the unit identify  
the setpoint “ON” condition, with SP 1 being the top position through SP  
4 at the bottom.  
The protective conductor terminal is bonded to conductive  
parts of the equipment for safety purposes and must be  
connected to an external protective earthing system.  
4. LDP63100 Programming: The unit is a large display, designed to be  
remotely mounted. Therefore, the unit does not have a programming keypad.  
Unit programming should be accomplished by one of the following methods:  
Rear Terminal Block: External switches can be wired via the terminal block  
to allow unit programming. A minimum of 3 switches would be required.  
Optional Programming Remote (LDP6-PGM): This option provides a 10  
foot interconnecting cable and programming box. The Programming  
Remote contains buttons allowing easy programming of the display.  
Optional Serial Programming: You can purchase an RS232 or RS485 Comms  
Card and program the unit via Crimson, a Windows® based software  
program.  
CAUTION: Risk of Danger  
Read complete instructions prior to  
installation and operation of the unit.  
CAUTION: Risk of electric shock.  
DIMENSIONS In inches (mm)  
3
5. CERTIFICATIONS AND COMPLIANCES:  
SAFETY  
8. MODULE INSTALLATION:  
24-pin shrouded connector on LDP63100 engages connector on input module  
upon installation. Shroud ensures proper alignment by providing a lead-in for  
the module connector.  
UL Recognized Component, File #E313607, UL61010A-1, CSA C22.2  
No. 1010-1  
Recognized to U.S. and Canadian requirements under the Component  
Recognition Program of Underwriters Laboratories, Inc.  
UL Listed, File #E313547, UL508, CSA C22.2 No. 14-M95  
LISTED by Und. Lab. Inc. to U.S. and Canadian safety standards  
Type 4X Indoor Enclosure rating (Face only), UL50  
IEC 61010-1, EN 61010-1: Safety requirements for electrical equipment  
for measurement, control, and laboratory use, Part 1.  
IP65 Enclosure rating (Face only), IEC 529  
9. CONNECTIONS: Wiring connections are made to the LDP63100 terminal  
block and input module via high compression cage-clamp terminal blocks.  
Input Module Wiring: Instructions are provided in the included bulletin.  
LDP63100 Terminal Block Wiring:  
Wire Strip Length: 0.3" (7.5 mm)  
Wire Gage: 30-12 AWG copper wire  
Maximum Torque: 5-7 inch-lbs (0.58-0.81 N-m)  
CAUTION: DISCONNECT ALL POWER BEFORE  
INSTALLING OR REMOVING MODULE  
ELECTROMAGNETIC COMPATIBILITY  
EMC specifications determined by the model.  
6. ENVIRONMENTAL CONDITIONS:  
10. CONSTRUCTION: Aluminum front panel, enclosure, and rear cover with  
textured black polyurethane paint for scratch and corrosion resistance  
protection. Sealed front panel meets NEMA 4X/IP65 specifications for  
indoor use when properly installed. Installation Category II, Pollution Degree  
2. Panel gasket and keps nuts included.  
Operating Temperature Range: Determined by the model  
Storage Temperature Range: -40 to 60°C  
Operating and Storage Humidity: 0 to 85% max. RH (non-condensing)  
Altitude: Up to 2000 meters  
7. MOUNTING REQUIREMENTS:  
Max. panel thickness is 0.375" (9.5 mm)  
11. WEIGHT: 5 lbs (2.25 kg) (less module)  
Min. panel thickness for NEMA 4/IP65 sealing is 0.060" (1.52 mm)  
OPTIONAL PLUG-IN CARDS AND ACCESSORIES  
WARNING: Disconnect all power to the unit before  
installing Plug-in cards.  
Adding Option Cards  
COMMUNICATION PLUG-IN CARDS (LDP6-CDC)  
A variety of communication protocols are available for the LDP63100 series.  
Only one of these cards can be installed at a time. When programming the unit  
via Crimson, the RS232 or RS485 Cards must be used.  
The LDP63100 series meters can be fitted with up to three optional plug-in  
cards. The details for each plug-in card can be reviewed in the specification  
section of the included manual. Only one card from each function type can be  
installed at one time. The function types include Setpoint Alarms (LDP6-CDS),  
Communications (LDP6-CDC), and Analog Output (LDP6-CDL). The plug-in  
cards can be installed initially or at a later date.  
LDP6-CDC10 - RS485 Serial (Terminal) LDP6-CDC1C - RS485 Serial (Connector)  
LDP6-CDC20 - RS232 Serial (Terminal) LDP6-CDC2C - RS232 Serial (Connector)  
LDP6-CDC40 - Modbus (Terminal)  
LDP6-CDC4C - Modbus (Connector)  
SETPOINT ALARMS PLUG-IN CARDS (LDP6-CDS)  
The LDP63100 series has 4 available setpoint alarm output plug-in cards.  
Only one of these cards can be installed at a time. (Logic state of the outputs can  
be reversed in the programming.) These plug-in cards include:  
PROGRAMMING SOFTWARE  
DP6-SOFT is a Windows® based program that allows configuration of the  
LDP63100 meter from a PC. This software offers standard drop-down menu  
commands, that make it easy to program the LDP63100 meter. The program can  
then be saved in a PC file for future use. A serial plug-in card is required to  
program the meter using the software.  
LDP6-CDS10 - Dual Relay, FORM-C, Normally open & closed  
LDP6-CDS20 - Quad Relay, FORM-A, Normally open only  
LDP6-CDS30 - Isolated quad sinking NPN open collector  
LDP6-CDS40 - Isolated quad sourcing PNP open collector  
ANALOG OUTPUT PLUG-IN CARD (LDP6-CDL)  
Either a 0(4)-20 mA or 0-10 V retransmitted linear DC output is available  
from the analog output plug-in card. The programmable output low and high  
scaling can be based on various display values. Reverse slopes output is possible  
by reversing the scaling point positions.  
LDP6-CDL10 - Retransmitted Analog Output Card  
4
1.0 ASSEMBLING THE DISPLAY  
CAUTION: The input module main circuit board and the option  
cards contain static sensitive components. Before handling the  
module or the cards, discharge static charges from your body by  
touching a grounded bare metal object. Handle the module by  
the rear plastic cover only, and the option cards by the board  
edges. Dirt, oil or other contaminants that contact the circuit  
boards or components can adversely affect circuit operation.  
WARNING: Exposed line voltage exists on the input module main  
circuit board and the option cards. DO NOT apply power to the  
module OR load circuits until the module is properly installed  
in the LDP63100 case.  
NOTE: All module and option card labels must be installed as  
shown for safety purposes.  
Installing the Option Cards  
Prior to installing the LDP63100 Display, it is recommended that the  
option cards be assembled first. This will allow you the opportunity to insure  
all the boards are fitted properly into their connectors. Refer to the literature  
enclosed with the option cards for installation instruction.  
Removing The Input Module  
To remove the input module from the LDP63100  
Display, first remove all power and load circuits. Then  
insert a flat screwdriver blade (3/16" or 1/4") into  
the narrow slot between the LDP63100  
rear cover plate and the module’s  
plastic cover as illustrated in  
Figure 1. Twist the screwdriver  
in the direction shown to  
disengage the internal connectors  
while firmly squeezing and  
pulling back on the rear finger  
tabs (top and bottom). Carefully  
slide the module out of the case,  
keeping it properly aligned with  
the case opening.  
Figure 1, Removing an Input Module  
Reinstalling the Input Module  
To reinstall the Input Module, align the module with the  
opening in the LDP63100 case, as illustrated. The module  
must be oriented as shown, with terminal #1 toward the top  
of the LDP63100 case. Carefully slide the module into the  
LDP63100 case. The LDP63100 and input module  
connectors will begin to engage about ¼" from the bottom.  
At this point, apply a small amount of pressure to the rear of  
the input module to fully engage the connection. Be sure the  
module fully snaps into the slots at the rear of the LDP63100  
case. The input module holder can be removed with a ¼" nut  
driver to make inserting the module easier. The display is  
ready for installation.  
Installing the Labels  
Each option card and the input module are shipped with a  
connection label. These labels must be applied to the rear of  
the LDP63100 in the positions shown in the drawing.  
Figure 2, Reinstalling an Input Module and Option Cards  
5
2.0 INSTALLING THE DISPLAY  
DISPLAY INSTALLATION  
The LDP63100 display is intended to be  
mounted into a panel or enclosure. The display is  
DIMENSIONS In inches (mm)  
provided with a gasket to provide a water-tight  
seal. The recommended minimum panel thickness  
for NEMA 4/IP65 sealing is 0.060" (1.57 mm).  
For panel mounting, prepare the panel  
cut-out to the dimensions shown in  
Figure 3. The supplied template may be  
used to mark the cut-out and hole  
locations on the panel. After the panel  
cut-out has been deburred, slide the  
panel gasket over the rear of the display  
and onto the mounting studs. Insert the  
display into the panel cut-out as  
illustrated in Figure 4. Install 14 # 10-32  
keps nuts (supplied) and tighten evenly  
for uniform gasket compression. Do not  
over-tighten the nuts.  
By using additional mounting accessories,  
Figure 3, Panel Cut-out for the LDP63100  
the LDP63100 can be surface-wall mounted,  
suspended, or bottom mounted. Separate installation  
instructions are provided with the mounting accessories.  
Environment And Cleaning  
The display should be installed in a location that does not exceed the maximum  
operating temperature and provides good air circulation. Placing the system  
near devices that generate excessive heat should be avoided.  
The bezel should be cleaned only with a soft cloth and neutral  
soap product. Do NOT use solvents. Continuous exposure to  
direct sunlight may accelerate the aging process of the bezel.  
Figure 4, Installing The LDP63100 Into A Panel  
6
3.0 WIRING AND PROGRAMMING THE DISPLAY  
Once assembled, the LDP63100 has all the same  
functions and capabilities of our DP63500, DP63600, and  
DP63700 Series Intelligent Panel Meters. Therefore, you  
will find the appropriate meter information packed with  
the LDP63100. Simply follow the instructions to wire  
and program the display for your application.  
Note: Both the LDP63100 and the input module  
require power. It is recommended to connect the primary  
AC power to the LDP63100 terminal block, then jumper  
to the input module.  
LDP63100 PROGRAMMING  
The unit is a large display, designed to be remotely mounted. Therefore, the unit  
does not have a programming keypad. Unit programming must be accomplished by  
one of the following three methods:  
Optional Programming Remote (LDP6-PGM)  
This optional programming remote plugs  
into the LDP63100 through an RJ12  
connector and a 10 foot cable. The  
buttons on the programming box function  
the same as the DP63500, DP63600, and  
DP63700 meters. Simply program the  
LDP63100 exactly as the meter  
instructions indicate. The programming  
box can be left connected to the  
LDP63100 for future programming  
changes or can be disconnected and used  
to program additional LDP63100 units.  
Rear Terminal Block  
External normally open switches can be wired via the terminal block to allow  
unit programming. A minimum of 3 switches would be required. Each  
external switch must be wired between the key and the common terminal.  
LDP63100 TERMINAL BLOCK  
RJ12 CONNECTOR ON BOTTOM OF UNIT  
7
NEMA 4/IP65 LARGE DISPLAY ENCLOSURE & SHROUD FOR LDP63100  
z LIGHT-WEIGHT ALUMINUM CONSTRUCTION  
z COMPLETELY SEALED FOR WASH-DOWN  
z MOUNTING CHANNELS FOR VERSATILE INSTALLATION  
DESCRIPTION  
The NEMA 4/IP65 Large Display Enclosure is designed to protect the  
LDP63100 from dust and hose directed water, when properly installed. This  
light-weight all aluminum unit utilizes welded seams and neoprene gaskets to  
meet NEMA 4/IP65 requirements. A textured, polyurethane coating protects  
against corrosion and is scratch resistant. Figure 1 below shows the overall  
Picture includes the LDP63100, NEMA Enclosure, and Shroud  
dimensions of the Enclosure. The Display Enclosure with Mounting Channels  
weighs 9 pounds (4.1 Kg).  
DIMENSIONS In inches (mm)  
MOUNTING  
Provided with the enclosure are two ¼-20 UNC x 1" hex  
bolts, two ¼-20 UNC “strut nuts”, and two ¼" washers. The  
“strut nuts” can be installed anywhere in the channel by  
inserting them, spring side down, into the channels, then  
rotating them 90 degrees clockwise until the notches engage  
with the lips of the channel. The bolts and washers provided  
allow mounting to surfaces ¼" to ½" thick (6.4 to 12.7 mm).  
Use longer bolts for mounting to thicker surfaces. Bolts  
fabricated from materials other than steel are not recommended.  
* Housing Only  
** Overall Including Screwheads  
Figure 1  
Figure 3  
TYPICAL INSTALLATIONS FOR NEMA 4/IP65 ENCLOSURE  
Removing the rear panel of the enclosure allows access to the Display for  
service. Either the rear panel or housing may be drilled to accept sealed conduit  
fittings, liquid-tight cable fittings or other types of wiring connectors. The  
enclosure may be attached to horizontal surfaces located above or below it,  
using the mounting channels provided.  
BASEMOUNT WITH WATERTIGHT  
CABLE CONNECTOR ENTERING  
THROUGH REAR PANEL.  
BEAM MOUNT WITH SEALED  
CONDUIT ENTERING FROM  
RIGHT SIDE.  
SUSPENDED FROM CONDUIT  
WITH SEALED FITTINGS.  
(SHOWN WITH SHROUD).  
Figure 2  
8
ASSEMBLY AND INSTALLATION PROCEDURE  
1. Install the two mounting channels on the enclosure housing using  
the four #8-32 screws provided and then insert the strut nuts  
(provided). Invert enclosure if base mounting.  
2. If the wiring is to be routed through the housing, make sure that  
the mounting channels are oriented properly before drilling, so  
the Display will be readable. Wiring is generally brought into the  
right side of the housing or rear panel, closest to the terminals of  
the input module. Drill the proper size hole in the housing or rear  
panel for the wiring connector or sealed conduit fitting and  
attach the fitting(s)  
3. Before installing the Display into the housing, be sure that the  
mounting channels are oriented properly for the type of  
installation planned. Place the gasket that is supplied with the  
Display over the studs extending from the front panel of the  
display.  
4. If using the shroud, refer to the Shroud Installation Procedure.  
Place the Display with gasket through the holes in the housing as  
shown at right. Working back and forth across the stud pattern,  
install the #10-32 keps nuts supplied with the Display on the  
studs. Tighten firmly.  
5. Mount the housing, using the strut nuts and steel ¼-20 UNC  
bolts and washers, as shown in figure 4.  
6. Connect the wires to the Display per the instructions included  
with the personality board.  
7. Remove the center section of the rear panel gasket. Apply the  
gasket to the rear panel of the enclosure by inserting the #8-32  
screws through the panel and into the holes in the gasket.  
Position the panel on the housing, start all of the screws, then  
* Supplied with LDP63100.  
firmly tighten them in a pattern working back and forth across the rear panel.  
Figure 4  
DIMENSIONS FOR THE LDP63100 DISPLAY SHROUD  
DIMENSIONS In inches (mm)  
The optional LDP63100 Display Shroud enhances the readability  
of the Displays that are installed in areas with high intensity overhead  
light sources. The Shroud can be used with the LDP63100 Display in  
any installation, (panel mount, NEMA 4/IP65 Enclosure, or Universal  
Mounting Bracket). When properly assembled, the Shroud will not  
affect the integrity of a NEMA 4/IP65 installation. The Shroud weighs  
1.0 pound (0.45 Kg).  
Figure 5  
SHROUD INSTALLATION PROCEDURE  
Installing The Shroud On An LDP63100 Display In A NEMA 4/IP65 Enclosure Or Panel  
1. Place a gasket over the studs extending from the rear of the front  
panel of the Display.  
2. Orient the shroud as shown in Figure 6, and place it over the  
display. The studs of the display should now be protruding  
through the rear of the shroud.  
3. Place the other gasket over the studs.  
4. Install the unit into the panel or enclosure using the #10-32 keps  
nuts that are supplied with the Display. Tighten the nuts firmly.  
Nema 4/IP65 Shroud Installation  
* Supplied with LDP63100.  
Figure 6  
9
PART NUMBER INFORMATION  
DESCRIPTION  
PART NUMBERS  
Temperature Input, 85-250 VAC power  
Universal DC Inputs, 85-250 VAC power  
True RMS AC Current and Volt Inputs, 85-250 VAC power  
Process Input, 85-250 VAC power  
Strain Gage Input, 85-250 VAC power  
LDP63100-T  
LDP63100-DC  
LDP63100-AC  
LDP63100-E  
LDP63100-S  
ACCESSORIES  
DESCRIPTION  
PART NUMBERS  
LDP6-ENC12  
LDP6-EN/SH  
LDP6-PGM  
NEMA 4 Enclosure  
NEMA 4 Enclosure With Shroud  
Programming Remote  
Shroud  
LDP631-SHR  
WARRANTY/DISCLAIMER  
OMEGA ENGINEERING, INC. warrants this unit to be free of defects in materials and workmanship for a  
period of 25 months from date of purchase. OMEGAs WARRANTY adds an additional one (1) month grace  
period to the normal two (2) year product warranty to cover handling and shipping time. This ensures  
that OMEGAs customers receive maximum coverage on each product.  
If the unit malfunctions, it must be returned to the factory for evaluation. OMEGAs Customer Service  
Department will issue an Authorized Return (AR) number immediately upon phone or written request. Upon  
examination by OMEGA, if the unit is found to be defective, it will be repaired or replaced at no charge.  
OMEGAs WARRANTY does not apply to defects resulting from any action of the purchaser, including but  
not limited to mishandling, improper interfacing, operation outside of design limits, improper repair, or  
unauthorized modification. This WARRANTY is VOID if the unit shows evidence of having been tampered  
with or shows evidence of having been damaged as a result of excessive corrosion; or current, heat,  
moisture or vibration; improper specification; misapplication; misuse or other operating conditions outside  
of OMEGAs control. Components in which wear is not warranted, include but are not limited to contact  
points, fuses, and triacs.  
OMEGA is pleased to offer suggestions on the use of its various products. However, OMEGA  
neither assumes responsibility for any omissions or errors nor assumes liability for any  
damages that result from the use of its products in accordance with information provided by  
OMEGA, either verbal or written. OMEGA warrants only that the parts manufactured by the  
company will be as specified and free of defects. OMEGA MAKES NO OTHER WARRANTIES OR  
REPRESENTATIONS OF ANY KIND WHATSOEVER, EXPRESSED OR IMPLIED, EXCEPT THAT OF  
TITLE, AND ALL IMPLIED WARRANTIES INCLUDING ANY WARRANTY OF MERCHANTABILITY  
AND FITNESS FOR A PARTICULAR PURPOSE ARE HEREBY DISCLAIMED. LIMITATION OF  
LIABILITY: The remedies of purchaser set forth herein are exclusive, and the total liability of  
OMEGA with respect to this order, whether based on contract, warranty, negligence,  
indemnification, strict liability or otherwise, shall not exceed the purchase price of the  
component upon which liability is based. In no event shall OMEGA be liable for consequential,  
incidental or special damages.  
CONDITIONS: Equipment sold by OMEGA is not intended to be used, nor shall it be used: (1) as a “Basic  
Component” under 10 CFR 21 (NRC), used in or with any nuclear installation or activity; or (2) in medical  
applications or used on humans. Should any Product(s) be used in or with any nuclear installation or activity,  
medical application, used on humans, or misused in any way, OMEGA assumes no responsibility as set forth  
in our basic WARRANTY/DISCLAIMER language, and, additionally, purchaser will indemnify OMEGA and  
hold OMEGA harmless from any liability or damage whatsoever arising out of the use of the Product(s) in  
such a manner.  
RETURN REQUESTS/INQUIRIES  
Direct all warranty and repair requests/inquiries to the OMEGA Customer Service Department. BEFORE  
RETURNING ANY PRODUCT(S) TO OMEGA, PURCHASER MUST OBTAIN AN AUTHORIZED RETURN (AR)  
NUMBER FROM OMEGAS CUSTOMER SERVICE DEPARTMENT (IN ORDER TO AVOID PROCESSING  
DELAYS). The assigned AR number should then be marked on the outside of the return package and on any  
correspondence.  
The purchaser is responsible for shipping charges, freight, insurance and proper packaging to prevent  
breakage in transit.  
FOR WARRANTY RETURNS, please have the  
following information available BEFORE  
contacting OMEGA:  
1. Purchase Order number under which the product  
was PURCHASED,  
FOR NON-WARRANTY REPAIRS, consult OMEGA  
for current repair charges. Have the following  
information available BEFORE contacting OMEGA:  
1. Purchase Order number to cover the COST of the  
repair,  
2. Model and serial number of the product under  
warranty, and  
3. Repair instructions and/or specific problems  
relative to the product.  
2. Model and serial number of the product, and  
3. Repair instructions and/or specific problems  
relative to the product.  
OMEGAs policy is to make running changes, not model changes, whenever an improvement is possible. This affords our  
customers the latest in technology and engineering.  
OMEGA is a registered trademark of OMEGA ENGINEERING, INC.  
© Copyright 2006 OMEGA ENGINEERING, INC. All rights reserved. This document may not be copied, photocopied,  
reproduced, translated, or reduced to any electronic medium or machine-readable form, in whole or in part, without the  
prior written consent of OMEGA ENGINEERING, INC.  
Where Do I Find Everything I Need for  
Process Measurement and Control?  
OMEGA…Of Course!  
Shop online at omega.com  
TEMPERATURE  
] Thermocouple, RTD & Thermistor Probes, Connectors, Panels & Assemblies  
] Wire: Thermocouple, RTD & Thermistor  
] Calibrators & Ice Point References  
] Recorders, Controllers & Process Monitors  
] Infrared Pyrometers  
PRESSURE, STRAIN AND FORCE  
] Transducers & Strain Gages  
] Load Cells & Pressure Gages  
] Displacement Transducers  
] Instrumentation & Accessories  
FLOW/LEVEL  
] Rotameters, Gas Mass Flowmeters & Flow Computers  
] Air Velocity Indicators  
] Turbine/Paddlewheel Systems  
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pH/CONDUCTIVITY  
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] Benchtop/Laboratory Meters  
] Controllers, Calibrators, Simulators & Pumps  
] Industrial pH & Conductivity Equipment  
DATA ACQUISITION  
] Data Acquisition & Engineering Software  
] Communications-Based Acquisition Systems  
] Plug-in Cards for Apple, IBM & Compatibles  
] Datalogging Systems  
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HEATERS  
] Heating Cable  
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] Immersion & Band Heaters  
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ENVIRONMENTAL  
MONITORING AND CONTROL  
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] Refractometers  
] Pumps & Tubing  
] Air, Soil & Water Monitors  
] Industrial Water & Wastewater Treatment  
] pH, Conductivity & Dissolved Oxygen Instruments  
M4493/0607  

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