User Guide | Gas detecting sensor, type PAGM for CO2 and Halocarbon
© Danfoss | DCS (vt) | 2021.03
BC372016561395en-000101 | 9
Accuracy check should be performed once every 12 months to ensure peak performance of the unit
see below guidelines.
Important:
The accuracy check can only be performed when the unit is in Normal Operation – see
above. Do NOT use pure refrigerant to perform this test as doing so will damage the unit.
PAGM-IR for CO2
• Using a regulator, inflate a plastic bag (at least 20 L) with CO2 mixture of known concentration
(recommended 5000 ppm)
• Insert the wand and seal the plastic bag opening while minimizing any leakage. Let the PGM
stabilize over a few minutes
• The PGM-IR should read /- 5% of the calibrated gas minus the ambient CO2 level (typically
~390 ppm).
Example: unit exposed to 5000 ppm should read 4610 ppm +/- 5%, which is from 4380 – 4840 ppm
PAGM-IR for halogen gas
• Set-up the unit to measure R134A gas,
• Using a regulator, inflate a plastic bag (at least 20 L) with R134A gas mixture of known concertation
(recommended 500 ppm)
• Insert the wand and seal the plastic bag opening while minimizing any leakage. Let the PGM
stabilize over a few minutes
• The PGM-IR should read /- 5% of the calibrated gas ppm value
Example: Unit exposed to 500ppm should read between 475 and 525ppm.
If the unit is outside the parameters please contact Danfoss technical support department for further
assistance.
5.3 Verification
Front
Remove
screws (3)
Remove screws (2)
Left side
Rear
Remove
screws (3)
Remove screws (2)
Right side
Note:
When fitting the Hydrophobic Filters please observe the correct orientation as fail to do so will
result in monitor fault condition –
“NO FLOW” code <0800>
.
