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Rev. 11-5 12/15/2020
Copyright © 2020 by Cool Air Incorporated. All rights reserved.
8.
Set the rotary selector switch to position “2”.
9
9
.
.
Press and hold the “DOWN” button for 2 seconds. This clears
the zero offset so it can be reset (if necessary, for the new
sensor)
1
1
0
0
.
.
If the display does not read zero perform steps 3 and four
above.
Follow these instructions to calibrate the detector:
11.
Open the detector enclosure and move the service jumper to
the “ON” position, if needed. This step deactivates the pre-
alarm, Alarm, and Auxiliary relays so that any attached strobe
lights, horns, and/or monitoring systems are not activated. In
some applications, if alarming is required, leave the service
jumper in the “OFF” position.
12.
Install the jumper on the jumper pins (labeled “SET1”) located
below the rotary selector switch on the front panel-mounted
circuit board.
13.
Set the rotary selector switch to position “9”.
14.
Apply span gas certified span gas at 0.3 L/min (span gas must
be in air, not nitrogen or other carrier). until a stable ammonia
concentration reading is displayed. It might take several
minutes for the reading to stabilize this should be at a
maximum 2 minutes.
15.
Press the “UP” or “DOWN” button until the display indicates
the concentration of the known sample. For example, if the
sample ammonia concentration is 100 PPM, press the “UP” or
“DOWN” button until the display indicates 100 PPM.
16.
Press and hold the “ENTER” button for at least 2 seconds.
17.
Remove the span gas.
18.
Set the rotary selector switch to the desired position (typically
“0” or “1”).
Wait until the ammonia concentration reading is below the
pre-alarm set point, then move the service jumper to the
“OFF” position and close the detector enclosure. Remember,
this step is only required if the service jumper was moved to
the “ON” position in step # 1 above. Testing is now complete.
