DOD PS-7 User Manual
EXTRACTIVE GAS DETECTOR
OPERATION MANUAL
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 www.dodtec.com
Some of the settings on this unit (alarm settings, etc.) are password protected.
This Operation Manual explains the following items:
•
Passwords
•
Changing settings
1 Passwords
1-1 Password-protected Settings
• Span adjustment (Refer to 2-1 Span Adjustment)
•
21vol% adjustment (Refer to
•
The values of various settings (Refer to 2-3 Changing Setting Values)
•
The values of alarm settings (Refer to 2-4 Changing the Alarm Settings)
1-2 Releasing the Password Lock
(1) Press these key switches in the following order.
1. ZERO switch
2. UP switch
3. Special command switch
4. DOWN switch
(2) The password lock is released when the
POWER lamp (green) blinks once.
2-2 21Vol% Adjustment
1
3
POWER lamp (green)
Blinks once
)
2
4
(3) The password lock is automatically reactivated
10 minutes after it has been released.
Important tasks, such as changing alarm settings, span adjustment, etc., can be carried out once
the password lock is released. Take the utmost care regarding confidentiality of the password.
Warning
2 Changing Settings
g
2-1 Span Adjustment
(1) Set to maintenance mode
(2) Release the password lock. (Refer to 1-2 Releasing the Password Lock.)
Left: Maintenance 1 (MNT1)
Center: Normal mode
Right: Maintenance 2 (MNT2)
Toxic gas sensor unit : CDS-7
Combustible gas sensor unit : CHS-7
(MNT1 or MNT2).
TROUBLE lamp (yellow) blinks.
The “__” indication and the
concentration value of the detected
as blink alternately.
MNT1 or MNT2 is displayed at the
bottom of the LCD screen.
Pull back to open
(3) Press the SPAN switch.
SPAN switch
(4) Let the calibration gas through.
SPAN is displayed at the bottom
right of the LCD screen.
(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
screen will go off, and the span adjustment will be completed.
UP/DOWN switch
(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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