Danfoss PAGM User manual

User Guide
Gas detecting sensor
Type PAGM for CO and Halocarbon
www.danfoss.com

User Guide | Gas detecting sensor, type PAGM for CO2 and Halocarbon
© Danfoss | DCS (vt) | 2021.032 | BC372016561395en-000101
1. Visual inspection .............................................................................................................................................................. 3
2. Connecting gas-sample probe and exhaust 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 System Faults Screen................................................................................................................................................6
4.3 Related to fault codes page ...................................................................................................................................7
5. Maintenance .....................................................................................................................................................................8
5.1 Replacing filters..........................................................................................................................................................8
5.2 Replacing Internal Hydrophobic Filters ............................................................................................................8
5.3 Verification ................................................................................................................................................................... 9
Contents

User Guide | Gas detecting sensor, type PAGM for CO2 and Halocarbon
© Danfoss | DCS (vt) | 2021.03 BC372016561395en-000101 | 3
1. Visual inspection
2. Connecting gas-sample
probe and exhaust and
zero air filter assembly
2.1 Gas-Sample Probe
2.2 Purge/Zero Air Carbon
Filter Assembly
PAGM-IR Halogen gas (code no. 080Z2149)
Item Qty.
Refrigerant monitor 1
Soft carrying case with shoulder strap 1
Battery pack and charger kit 1
Probe assembly 1
Coalescing filter 1
Carbon filter 1
PAGM-IR CO (code no. 080Z2148)
Item Qty.
Refrigerant monitor 1
Soft carrying case with shoulder strap 1
Battery pack and charger kit 1
Probe assembly 1
Coalescing filter 1
Hazardous area warning:
This instrument has not been designed to be intrinsically safe for use in areas classified as hazardous
locations. For your safety, DO NOT use it in hazardous (classified) locations.
Do not operate this equipment in the presence of flammable liquids, vapours or aerosols.
Combustible/flammable gas warning:
This is NOT a safety device. Some gases which this instrument can detect may be combustible/
flammable. When properly configured, this instrument is designed to alarm at concentrations that
are lower than the explosive limit of the gas. As such, it is the buyer’s responsibility to initiate an
immediate planned response to any gas leaks as soon as they are detected. This equipment should
NEVER be used to measure or sample gases at or above their respective lower explosive limits.
Operation of any electrical equipment in such an environment constitutes a safety hazard.
Warning:
A gas monitor is a delicate and complex device and it is not to be used in any application that is
beyond its intended purpose or beyond the scope of its specifications. 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 if you are unsure of the validity of a
particular gas monitor application.
Warning:
A potential risk exists if the operating instructions are not followed.
Warning:
To avoid risk of injury from electric shock, do not open the enclosure when power is applied.
Caution:
Except for the maintenance detailed in this manual, this product should ONLY be opened and / or
serviced by authorized personnel. Failure to comply may void the warranty.
When you receive the instrument, please unpack from it from shipping carton and perform visual
check on the enclosure to ensure no damage to the external parts of the unit which might have
occurred during shipment. Check that all the below items have been received.
Before first power up connect all necessary accessories as described on below, this will ensure correct
functionality of the unit.
To connect the gas-sample probe to the monitor, connect the probe to the gas sample port (see
picture below).
A Purge/Zero Air Carbon Filter must be installed to properly use the Portable Aspirated Refrigerant
Monitor (PAGM).
Filter installation:
1. Unfasten the Velcro on the front of the monitor soft case.
2. Slide the Purge/Zero Air Carbon Filter into the front pocket. Route the tubing through the hole in
the back of the pocket, along the side of the housing.
3. Insert the connector extending from the Purge/Zero Air Carbon Filter into the Zero Air Inlet Port on
the monitor.
4. Refasten the Velcro.
The Leak Detector will periodically (up to 4-minute intervals) draw clean air from an inlet port on the
side of the chassis for the CO.
The external Purge/Zero Air Carbon Filter must be connected to the intake port in order to absorb any
refrigerant present in the area of operation.

User Guide | Gas detecting sensor, type PAGM for CO2 and Halocarbon
© Danfoss | DCS (vt) | 2021.034 | BC372016561395en-000101
Note: When the Carbon Purge/Zero Air filter is saturated and can no longer absorb refrigerant,
refrigerant can pass through and offset the baseline measurements of the unit which will than result in
unit going into fault condition <0100> error will appear. Please adhere to filter maintenance intervals
as below recommended.
2.3 Battery
3. Front Panel Display &
Controls
The monitor is powered by a rechargeable battery pack located in a pouch on the side of the monitor’s
soft carrying case. The battery pack can be recharged at any time, regardless of the battery’s current
charge state. The lithium-ion battery will likely be partially charged. However, you should fully charge
the battery prior to operating the PGM-IR. Refer to the battery manufacturer’s instruction sheet for the
proper charging procedure.
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 details).
A fully charged battery pack will power the monitor for a minimum of 8 hours.
ALARM (Red LED)
DISPLAY SCREEN
ENTER key
1. Press to zero the peak reading
2. When in the Control/Setup menu
mode, press to save a displayed
value
KEYPAD
When in the Control/Setup menu mode,
use these buttons to:
1. Move the arrow (>) on the display
screen to the desired function
2. Scroll through data
3. Change a function’s value
Enter the Control/Setup menu mode
by pressing the left and right arrow
buttons simultaneously
POWER ON/OFF (toggle switch)
Carrying handle
SYSTEM FAULT (Yellow LED)
MONITOR ON (Green LED)
(flashed during warm-up)
SILENCE/ESC
Press this button to:
1. Temporarily silence the audible alarm
2. Return to the previous screen without
saving data
RS-232 connector
Tubing connection
Coalescing Inline Filter Element
Power
switch
Purge/Fresh Air
Carbon Filter
Gas
sample
port
Zero air
inlet port
Exhaust
port
Battery pack
connector

User Guide | Gas detecting sensor, type PAGM for CO2 and Halocarbon
© Danfoss | DCS (vt) | 2021.03 BC372016561395en-000101 | 5
PAGM-IR FOR CO - ONLY
Important:
• The CO PGM-IR (PN: 080Z2148) displays CO PPM gas readings that are relative to ambient air, NOT
absolute CO PPM readings.
• If the air in purge air bag is contaminated, use the EMPTY BAG function to clear the bag, then fill the
bag with clean air.
To turn ON the monitor, lift up the shield located in front of the handle and press the red power ON/
OFF switch.
Important:
• The CO PAGM-IR (PN: 080Z2148) during warm-up needs to be filled with ambient/clean air (outside
(prior to CO testing.
When the monitor has been powered ON immediately all front panel lights turn ON and a splash
screen appears showing the monitor’s current firmware revision level. After a brief moment the Warm
Up screen is displayed along with the front panel ON light (green) blinking allow the monitor it to
warm up for approx. 5 minutes.
PAGM-IR for halogen gas
After the Warm Up has finished the unit is ready to measure gas, please select the appropriate gas
using the display menu.
During normal operation Display screen shows when the monitor is performing the following
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 monitor is resetting baseline ppm value using fresh Air.
• PRES CHK is displayed when the monitor is performing an atmospheric pressure check, which is
done to ensure the accuracy of the gas measurement under varying atmospheric conditions. This
pressure check is performed every 30 minutes.
PAGM-IR for CO
Important:
• The CO PGM-IR (PN: 080Z2148) has an internal purge air bag that needs to be filled with ambient/
clean air prior to CO testing. This air is used to purge the IR detector of sample gas and establish a
“zero” ppm baseline. Therefore, for greatest accuracy, it is important to ensure the purge air bag is
filled with clean ambient air from outside (away from breathing, car exhaust, etc.).
• The CO PGM-IR (PN: 080Z2148) displays CO PPM gas readings that are relative to ambient air, NOT
absolute CO PPM readings.
• If the air in purge air bag is contaminated, use the EMPTY BAG function to clear the bag, then fill the
bag with clean air.
4. General operation
4.1 Normal operation
ABSOLUTE RELATIVE
436 ppm
386 ppm 0 ppm
50 ppm
MEASURE
50 ppm
Relative CO level in
refrigerant testing area
Absolute
CO level in
ambient air
386 ppm
Adjusted CO baseline
0070 pk
CO
CO
Level
Danfoss 80G8244

User Guide | Gas detecting sensor, type PAGM for CO2 and Halocarbon
© Danfoss | DCS (vt) | 2021.036 | BC372016561395en-000101
Immediately after warm-up a message appears and an audible alarm is sounded when the monitor’s
internal Purge Air Bag is empty to fill in the Purge Air Bag press ENTER – see below message.
The purge bag needs to be filled with fresh/clean air failure to do so can result in wrong ppm readings
or Bag Fill Fault - error code <2000>.
After the bag has been filled with air it will last for approximately 40 minutes of normal operation after
that time the bag needs to be filled again, press the ENTER button to start the refill process ensure that
it is filled with clean/fresh air.
After the air bag has been filled successfully, the monitor starts or resumes normal operation by
displaying the Data Display Screen Measure.
To access the Main Menu from the Data Display screen, press both the Keypad Left and Right buttons
at the same time. Next, use the Keypad buttons to move the arrow (>) until it points to the desired
function, and then press the ENTER button to select that function.
If a system malfunction occurs the front panel FAULT light will flash and the audible alarm, if activated
will start beeping.
The FAU LT light and audible alarm will automatically turn OFF after the cause of the fault has been
eliminated.
Pressing 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.
Once the FAU LT function is selected on the Data Display press the ENTER button to select that
function. FAULT menu will appear which contains records of the last 30 fault events. The most recent
event is displayed when the Fault screen is first displayed. After 30 events have been recorded, the
newest record overwrites the oldest. Each record lists an event’s numeric fault code plus the date and
time at which the event occurred. If the fault is still present when the FAULTS function is selected, then
the current cause of the fault is displayed If the cause of the fault has been cleared, then the Faults Log
screen will show <0000> along with the date and time the fault was cleared, see fault table below for
troubleshooting.
The cause of the fault is identified by a numeric fault code. To convert the fault code into a text
description of the fault, first press the ENTER button and then use the Keypad buttons to scroll
through the display until the text description of the fault appears. If the fault code is a combination of
two or more faults, then continue to use the Keypad buttons until all fault text descriptions have been
displayed. For example, the fault code <1800> represents the summary of both a Sample Flow <0800>
and a Purge Flow <1000> fault as shown to the left.
4.2 System Faults Screen
Data display
No FAULTS
FAULT 1800

User Guide | Gas detecting sensor, type PAGM for CO2 and Halocarbon
© Danfoss | DCS (vt) | 2021.03 BC372016561395en-000101 | 7
4.3 Related to fault codes
page
The DIAG function displays sensor data and status information useful to users for troubleshooting
various fault conditions. Explanations of the data shown in these screens are given below.
First diagnostic screen
Code Type Description
<0001> Box Temperature Fault Enclosure temperature is outside normal range (or IR detector has
failed). Monitor has been subjected to extreme temperatures potential
damage to the unit.
Contact service department for further instructions.
<0002> Bench Temperature Fault Optical sensor is outside normal operating range (or IR detector has
failed). Monitor has been subjected to extreme temperatures potential
damage to the equipment.
Contact service department for further instructions.
<0004> Manifold Pressure Fault The manifold pressure is outside its normal operating range (or IR
detector has failed). Enter the DIAG function and record ALL data.
Contact service department for further instructions.
<0040> Fill Flow Fault The purge-air bag’s pressure drop is outside expected limits. Check for
a punctured bag or disconnected tubing. Refill the bag using FILLBAG
function - see manual for instruction.
If the issue persist contact service department.
<0080> Over Range Fault Monitor exposed to a gas level that exceeded 65,000 ppm
<0100> Zero Filter Fault PGM for halocarbons indicates contamination in the carbon filter. The
filter need to be replaced, replace the filter.
PGM for CO2 the purge-air bag is contaminated with gas. Take monitor
to a clean-air area and use the EMPTYBAG and FILLBAG functions to
decontaminate the purge-air bag,
If the issue persist contact service department.
<0200> Gain Set Fault The digipot autotune has failed.
Contact service department for further instructions.
<0400> A/D Fault A fault has occurred in the analog-to-digital circuitry. Turn on/off unit if
the issue persist. Contact 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 Hydrophobic Filters
replace if necessary. Once the air stream has been restored, the
monitor will return to normal operation after it completes a purge
cycle. If the issue persist contact service department.
<1000> Purge Flow Fault Check for a restriction in the gas-sample exhaust. Check the external
Carbon Filter and/or internal Hydrophobic Filter replace if necessary.
Once the purge air stream has been restored, the monitor will return to
normal operation after it completes a purge cycle.
<2000> Bag Fill Fault A punctured bag or disconnected tubing. Refill the bag, FILLBAG
function - see manual for instruction. If the issue persist contact service
department.
<4000> Zero Range Fault The IR detector’s output voltage is out of tolerance. Enter the DIAG
function and record all data.
Contact service department for further instructions.
<8000> Clipping Fault The detector voltage may be out of tolerance. Use the DIAG function to
check the IR detector voltage.
Contact service department for further instructions.
Screen item Description
Sensor voltage This is the current peak-to-peak output of the IR detector. In the absence of gas this
value can range from 3.90000 – 4.50000 V
Noise The noise value is a 16 point running average of the noise portion of the IR detector’s
output. This reading is valuable mainly when gas is NOT present.
Detector Temperature This is the current detector temperature in °C
Box Temperature This is the current internal enclosure temperature in °C
Fault Code Current fault code. A value of <0000> indicates that no faults are being detected.
Pressure Reading This is the pressure as measured every purge cycle with the sample pump off and the
gas-sample inlet open. Its value is weather and altitude dependent and can range
from 10.0 – 15.5 PSIA.
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.

User Guide | Gas detecting sensor, type PAGM for CO2 and Halocarbon
© Danfoss | DCS (vt) | 2021.038 | 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.

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 CO
• Using a regulator, inflate a plastic bag (at least 20 L) with CO 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 within +/- 5% of the calibrated gas minus the ambient CO 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 within +/- 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>.

© Danfoss | DCS (vt) | 2021.03 BC372016561395en-000101 | 10
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