Page | 25
Rev. 11-5 12/15/2020
Copyright © 2020 by Cool Air Incorporated. All rights reserved.
The detector is initially calibrated and programmed at the factory.
However, if a new ammonia sensor is installed, the detector must be
recalibrated.
All tests and calibrations must be recorded on an appropriate log
sheet.
T
T
e
e
s
s
t
t
i
i
n
n
g
g
t
t
h
h
e
e
D
D
e
e
t
t
e
e
c
c
t
t
o
o
r
r
The detector hardware and the connected system response can be
tested without exposing the sensor to ammonia. With the SET 1
jumper off, rotate the rotary switch to position 5. Pressing the
“DOWN” button will force the detector to simulate an ammonia
concentration equal to the LOW Alarm Set Point. Pressing the “UP”
button will force the detector to simulate an ammonia concentration
equal to the HI Alarm Set Point. The 4 to 20mA output current will
indicate the simulated ammonia concentration according to the 4 to
20mA range selected.
To test the detectors response to ammonia (for best results, allow at
least 20 minutes after first applying power to the detector):
1.
Open the detector enclosure and move the service jumper to the
“ON” position, if needed. This step deactivates the Per-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.
2.
Apply span gas (equal to or greater than the High Alarm Set
Point) at 0.3 L/min (span gas must be in air, not nitrogen or
other carrier).
3.
Check the following:
•
When the ammonia concentration reaches the Low
Alarm, set point the Low Alarm (yellow) LED will
light.
•
When the ammonia concentration reaches the Alarm,
set point the Alarm LED (red) will be on.
•
Digital display shows an increasing concentration of
ammonia in PPM.