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User Guide | Gas detecting sensor, type PAGM for CO2 and Halocarbon

© Danfoss | DCS (vt) | 2021.03

8 | BC372016561395en-000101

Second diagnostic screen

Screen item

Description

PPM Level

Parts Per Million level is the current detected gas level, and is the volume concentration 
referenced to standard temperature and pressure.

Average Absorption 
Unit

This is the optical absorbency. In the abscene of the gas the absorbency is 0.00000 au. 
When sampling gas, its value varies proportionally with the gas concentration

µMoles/Liter

This is the absolute concentration in micro-moles per liter of gas.

Detector Voltage

This is a running average of the IR detector’s sensor voltage.

Purge Valve Asterisk (*) The purge valve can be opened and closed by pressing the 

Keypad Left

 

button

. An 

asterisk appears on the display when the purge valve is open causing the monitor to 
draw air from its purge-air port.

Carbon filter maintenance intervals

Approximate ambient refrigerant

Level

Filter replacement interval

0 ppm

6 months

5 ppm

250 hrs

10 ppm

200 hrs

20 ppm

150 hrs

100 ppm

100 hrs

The Refrigerant Monitor requires periodic maintenance to ensure peak performance and accuracy 

including replacement of internal and external filters and calibration accuracy check refer to the 

manual for reference. 

External Coalescing Inline Filter and Internal Hydrophobic Filters replacement filter replacement 

should be carried out at least once every 6 months but is dependent on the environment and usage. 

If used in harsh environment where a large amount of dust and moisture particles are present in 

atmospheres the maintenance intervals need to be shortened.

The intervals for the Purge/Fresh Air Carbon filter might very and is related to time the equipment is 

used and ppm it was exposed to see table below.

When servicing the parts inside the Refrigerant Monitor, disassemble the monitor’s metal chassis as 

follows:

Items Required:

Medium Phillips head screwdriver

Disassemble procedure:

1.  Remove monitor and its battery pack from the soft carrying case.

2.  Unplug battery pack from monitor.

3.  Remove a total of 10 screws from the locations shown in the illustrations below.

4.  Carefully separate the metal chassis.

5.  Locate filters shown in the illustrations below – red circle

6.  Pull off tubing from both ends of filter and remove filter from instrument.

7.  Attach tubing to new filter.  Ensure correct orientation of the filter – the flow direction is 

highlighted with an arrow or/and green label. 

8.  Reassemble monitor.

Replace the following components using Danfoss Maintenance Kit – 

LP-DHGM-MM

a.  Coalescing inline Filter Element (Qty. 1)

b.  Purge/Fresh Air Carbon Filter (Qty. 1)

c.  Hydrophobic Filters (Qty. 2)

Note:

 Individual components not sold separately

After periodic maintenance the unit can experience faults <0200>, <2000>, <8000> please contact 

Danfoss technical support department for further assistance how to adjust the unit settings. 

5.  Maintenance  

5.1   Replacing filters

5.2 

Replacing Internal 

Hydrophobic Filters 

a.

b.

c.

Содержание PAGM

Страница 1: ...User Guide Gas detecting sensor Type PAGM for CO2 and Halocarbon www danfoss com...

Страница 2: ...xhaust and zero air filter assembly 3 2 1 Gas Sample Probe 3 2 2 Purge Zero Air Carbon Filter Assembly 3 2 3 Battery 4 3 Front Panel Display Controls 4 4 General operation 5 4 1 Normal operation 5 4 2...

Страница 3: ...tions For details on appropriate use refer to the general description application and operation discussions in this manual Before risking equipment damage or personal injury contact the manufacturer i...

Страница 4: ...Before the unit can be used please connect the battery pack the unit is designed for a 16 V DC input Set battery voltage output to 16 V refer to the battery manufacturer s instruction sheet for detail...

Страница 5: ...ng functions MEASURE indicates that the monitor is actively measuring the refrigerant gas level at the sample point To reset the peak value to zero press the ENTER button PURGE is displayed when the m...

Страница 6: ...ng the SILENCE button while a fault condition still exists causes the internal audible alarm to turn OFF for a period of time as set by the SILENCE The front panel FAULT light will continue to flash O...

Страница 7: ...act service department for further instructions 0800 Sample Flow Fault Check for a restriction in the gas sample inlet or exhaust Check the external Coalescing Inline Filter and or internal Hydrophobi...

Страница 8: ...ied out at least once every 6 months but is dependent on the environment and usage If used in harsh environment where a large amount of dust and moisture particles are present in atmospheres the maint...

Страница 9: ...ient 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 infl...

Страница 10: ...Danfoss DCS vt 2021 03 BC372016561395en 000101 10 ADAP KOOL...

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