EXTRACTIVE GAS DETECTOR
O P E R A T I O N M A N U A L
Model PS-7
For Administrators
• Operate this unit only after reading and fully understanding the content of this manual.
• This Operation Manual was written for administrator use. Instructions for the basic
operations of this unit are provided separately in the standard Operation Manual. Refer
to the Operation Manual when necessary.
740 McArdle Drive, Unit C – Crystal Lake, IL 60014
815-788-5200 Phone
815-788-5300 Fax
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2 Changing Settings
2-1 Span Adjustment
Toxic gas sensor unit : CDS-7
Combustible gas sensor unit : CHS-7
(1) Set to maintenance mode (MNT1 or MNT2).
TROUBLE lamp (yellow) blinks.
The “__” indication and the
concentration value of the detected
gas blink alternately.
MNT1 or MNT2 is displayed at the
bottom of the LCD screen.
Left: Maintenance 1 (MNT1)
Center: Normal mode
Right: Maintenance 2 (MNT2)
Pull back to open
(2) Release the password lock. (Refer to 1-2 Releasing the Password Lock.)
(3) Press the SPAN switch.
SPAN switch
SPAN is displayed at the bottom
right of the LCD screen.
(4) Let the calibration gas through.
(5) Use the UP/DOWN switch to adjust the concentration indication on the screen to that of the calibration
gas concentration.
(6) Once adjustments have been done, press the SPAN
switch again. The SPAN indication in the bottom right of the LCD
UP/DOWN switch
screen will go off, and the span adjustment will be completed.
(7) Remove the calibration gas, check that the detected gas concentration is under that of the alarm value,
and restore to the normal mode (by switching the maintenance switch to the center).
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2-2 21Vol% Adjustment
Oxygen sensor unit: COS-7
(1) Set to maintenance mode (MNT1 or MNT2).
TROUBLE lamp(yellow）blinks.
The “__” indication and the concentration
value of the Oxygen blink alternately.
MNT1 or MNT2 is displayed at the
bottom of the LCD screen.
Left: Maintenance 1 (MNT1)
Center: Normal mode
Right: Maintenance 2 (MNT2)
Pull back to open
(2) Release the password lock. (Refer to 1-2 Releasing the Password Lock.)
(3) Press the SPAN switch.
SPAN is displayed at bottom of the
LCD screen
SPAN switch
(4) Let the calibration gas through.
(5) Use the UP/DOWN switch to adjust the concentration indication on the screen to that of the calibration
gas concentration.
(6) When the adjustment is completed, press the SPAN switch again. The SPAN indication in the bottom
right corner of the LCD screen will then disappear, and the 21vol% adjustment is complete.
(7) Remove the calibration gas and confirm that no alarm is displayed( ALARM 1 , ALARM 2 is not shown). Then,
restore to the normal mode by switching the maintenance switch to the center.
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2-3 Changing Setting Values
Some of the setting values of the unit can be changed. Those that can be changed are listed in the table
below. The method for changing them is explained here.
(1) Release the password lock. (Refer to 1-2 Releasing the Password Lock.)
(2) Press the UP/DOWN switch (“U” or “V”)
until the setting you wish to
change ( “LCD Screen Indication” in the
table below ) is displayed at the bottom right of
UP/DOWN switch
the LCD display.
Setting to be changed
(3) Then press the special command switch, and the
setting to be changed ( “LCD Screen Indication”
in the table below ) and “—“ will flash alternately.
- - - - -
d1 0
Special command switch
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(4) Change the value by using the UP/DOWN switches (“U” or “V”). When you are done, press the special
command switch again, and the alternating display in the bottom right corner of the LCD display will
become constant. The process is now finished.
Default value
LCD
Screen
Indication
Toxic:
CDS-7
Combustible
: CHS-7
The function
to be set
Adjustable
Range
Remarks
Oxygen:
COS-7
Time delay (secs.) of the gas
alarm contact (1st level)
Time delay (secs.) of the gas
alarm contact (2nd level)
Time delay 1
Time delay 2
d1
d2
0
0
d1
0
0
0 to 99 sec
0 to 99 sec
d1 **
d2 **
az
d2
Analog output
(base)
(*For our maintenance purposes only)
Analog output
(span)
(*For our maintenance purposes only)
as
Zero
suppression, or
21vol%
Displays the percentage of the full
scale value (rounded to the
percent)
zs
*
zs
5
zs
2
0 to 30%
suppression
1st: upper limit, 2nd : upper limit
warning
1st : lower limit, 2nd : lower limit
warning
1st : upper limit, 2nd: lower limit
warning
H-H
L-L
H-L
H-H
L-L
H-L
Alarm mode
H-H
Con
L-L
Pyroletic
converter
failure alarm
Calibration
gas
concentration
The existence
of a DeviceNet
unit
Con
*
０: Off
1: On
0
Con
0
0 or 1
0 or 1
(*For our maintenance purposes only)
CG **
CG 40
0
CG 84
nEt
F
*
０: Non-existent
1: Existent nEt
nEt
0
Calibration gas type in lower right of
LCD
f value in center of LCD
Display ofｆ
value
(Depending on the sensor unit)
***
Displays rate
of flow
Shows the current rate of flow
(mL/min)
(Depending on the rate of flow)
--
FL ***
Sensor unit
output
Auto 21vol%
adjustment
(*For our maintenance purposes)
P
***
*
０: Off
1: On
--
A t
1
0 or 1
At
Type of sensor unit (Normal display)
(Depending on the sensor unit)
×××
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2-4 Changing the Alarm Settings
The values of alarm settings on this unit can be changed. The method for changing them is explained
here.
(1) Release the password lock. (Refer to 1-2 Releasing the Password Lock.)
(2) Press the AL switch until the alarm setting
to be changed is displayed on the LCD display.
(The bottom right of the screen, as in the table below.)
The alarm setting for the actual gas concentration is
displayed in the middle of the screen, and the
Gas concentration
percentage of the full scale value is displayed in the
The percentage of the full scale value
AL switch
bottom right corner
LCD Display
Explanation of
the default value
Adjustable
Range
Indication
(Lower right)
Default value
Toxic : CDS-7
10% F.S.
72% F.S.
20% F.S.
A1 10
A2 72
A2 20
Comb. : CHS-7
A1 **
0 to 100% F.S.
0 to 100% F.S.
Oxygen: COS-7
Toxic : CDS-7
Comb. : CHS-7
A2 **
Oxygen: COS-7
76% F.S.
A2 76
* Pressing the AL switch changes to 1st level Æ 2nd levelÆ Normal display.
* The A2 value should be greater than the A1 value in any case.
(3) Press the special command switch.
The setting to be changed and the “—“
indication will then flash alternately.
- - - - -
A1 10
Special
command
switch
UP/DOWN switches
(4) Change the value by using the UP/DOWN key “U” and”V”.
When you are done, press the special command switch again, and the alternating display in the lower
right corner of the LCD display will become constant. The process is now finished.
(5) When this is finished, press the UP/DOWN switches (“U” or”V”) again to return to the normal display.
Note
The relationship between 1st level and 2nd level alarm values of each alarm mode is as follows:
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H – H mode (1st level: Upper limit, 2nd level: Upper limit)
Full Scale
2nd level gas alarm : ALARM 1 , ALARM 2 is displayed.
Alarm contacts ZA1 and ZA2 are activated
Alarm value is set by entering A2 **
1st level gas alarm : ALARM 1 is displayed.
Alarm contact ZA1 is activated
Alarm value is set by entering A1 **
0ppm
Normal state (No gas is detected)
L – L mode (1st level: Lower limit, 2nd level: Lower limit)
25vol%
21vol%
Normal state
1st level alarm : ALARM 1 is displayed.
Alarm contact ZA1 is activated.
Alarm value is set by entering A2 **
2nd level alarm : ALARM 1 , ALARM 2 is displayed.
Alarm contact ZA1 and ZA2 are activated.
Alarm value is set by entering A1 **
0 vol%
H – L mode (Upper limit, Lower limit)
50vol%
Upper alarm : ALARM 2 is displayed.
Alarm contact ZA2 is activated.
Alarm value is set by entering A2 **
Normal state
21vol%
0 vol%
Lower alarm : ALARM 1 is displayed.
Alarm contact ZA1 is activated.
Alarm value is set by entering A1 **
* A2 value should be always greater than A1 value.
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Manual Revision History
Edition No.
GAE-019
Date
July 2004
Revisions
Additional copies of this Operation Manual are available.
Contact the following address for ordering information.
Manufacturer:
New Cosmos Electric Co., Ltd.
2-5-4 Mitsuya-naka
Yodogawa-ku
Osaka 532-0036, Japan
Phone 81-6-6309-1505
Fax 81-6-6309-1514
Distributor:
DOD Technologies, Inc
740 McArdle Drive
Unit C
Crystal Lake, IL 60014
Phone 815-788-5200
Fax 815-788-5200
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