DOD Carbon Monoxide Alarm PS 7 User Manual

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  
 
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).  
 
2-2 21Vol% Adjustment  
Oxygen sensor unit: COS-7  
(1) Set to maintenance mode (MNT1 or MNT2).  
TROUBLE lamp(yellowblinks.  
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.  
 
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  
 
(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  
*
: 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
*
: 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
***  
*
: Off  
1: On  
--  
A t  
1
0 or 1  
At  
Type of sensor unit (Normal display)  
(Depending on the sensor unit)  
×××  
 
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:  
 
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.  
 
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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