MSR ELECTRONIC PolyXeta 2 Series User manual

PolyXetais a registered trademark of MSR Made in Germany GAPX2_Freon_E_2020_05_18
Phone: [phone] Fax: [phone] Specification subject to change without notice
MSR-Electronic GmbH, Buergermeister-Schoenbauer-Str. 13, D 94060 Pocking www.msr-electronic.de
Gas Detector Series PolyXeta2 with Semi-conductor Sensor
for Freon Gases and Refrigerants for Zone1 and Zone 2
User Manual
Edition: English, 2020_05_18 V_1.4
PX2 YouTube Video
Up-to-date data sheets and user manuals can be found in the download area on www.msr-24.com.

User Manual - PolyXeta®2 Detector with HL Sensor
for Refrigerant Gases - May_2020
Page 2
PolyXetais a registered trademark of MSR Made in Germany GAPX2_Freon_E_2020_05_18
Phone: [phone] Fax: [phone] Specification subject to change without notice
MSR-Electronic GmbH, Buergermeister-Schoenbauer-Str. 13, D 94060 Pocking www.msr-electronic.de
1Notes and General Information .............................................................................4
1.1 Applicability ........................................................................................................................... 4
1.2 Intended Use .......................................................................................................................... 4
1.3 For Your Safety ....................................................................................................................... 4
1.4 Installer’s and Operator’s Responsibilities ............................................................................ 4
1.5 Maintenance ........................................................................................................................... 4
1.6 Liability................................................................................................................................... 4
1.7 Approvals................................................................................................................................ 5
1.7.1 Marking and Certificates according to ATEX Directive 2014/34/EU ................................. 5
1.7.2 Marking and Certificates according to IECEx only for PX2-1............................................. 5
1.7.3 Terms and Conditions for Safe Use .................................................................................... 5
1.7.4 Listing of Freon Gases......................................................................................................... 6
1.7.5 Listing of Ammonia............................................................................................................. 7
2General Description ...............................................................................................7
2.1 Device Description ................................................................................................................. 7
2.2 Measurement Principles......................................................................................................... 7
3Mounting Instructions............................................................................................8
3.1 Site of Installation .................................................................................................................. 8
3.2 Installation Work .................................................................................................................... 8
4Electrical Installation ...........................................................................................10
4.1 General Notes....................................................................................................................... 10
4.2 Connection Diagram............................................................................................................. 11
5Commissioning.....................................................................................................12
5.1 General Notes....................................................................................................................... 12
5.2 Check / Change of Operating Parameters............................................................................ 12
5.3 Running-in Characteristics ................................................................................................... 12
5.4 Functional Test ..................................................................................................................... 13
6Operating Modes..................................................................................................14
6.1 Restart (Diagnostic and Warm-up Stage)............................................................................. 14
6.2 Measuring Mode ................................................................................................................... 14
6.2.1 Alarm Acknowledgement ................................................................................................. 15
6.3 Special Mode ........................................................................................................................ 15
6.4 Faults .................................................................................................................................... 16
7Notes on Usage.....................................................................................................17
7.1 Ambient Conditions.............................................................................................................. 17
7.2 Further Notes and Restrictions............................................................................................. 17

User Manual - PolyXeta®2 Detector with HL Sensor
for Refrigerant Gases - May_2020
Page 3
PolyXetais a registered trademark of MSR Made in Germany GAPX2_Freon_E_2020_05_18
Phone: [phone] Fax: [phone] Specification subject to change without notice
MSR-Electronic GmbH, Buergermeister-Schoenbauer-Str. 13, D 94060 Pocking www.msr-electronic.de
8Maintenance and Service .....................................................................................18
8.1 Visual Inspection .................................................................................................................. 18
8.2 Functional Control / Calibration and Adjustment................................................................ 18
8.3 System Check / Proof Test.................................................................................................... 19
8.3.1 Necessary Equipment and Gases...................................................................................... 20
8.4 Calibration ............................................................................................................................ 20
8.4.1 Preliminaries..................................................................................................................... 20
8.4.2 Procedure for Calibration with Tool or Display................................................................ 21
8.4.3 Extended Calibration: ....................................................................................................... 21
8.5 Repairs.................................................................................................................................. 21
9Exchange of Sensor Head.....................................................................................22
9.1 General Notes....................................................................................................................... 22
9.2 Exchange of Sensor Head..................................................................................................... 22
9.3 Recommissioning ................................................................................................................. 22
9.4 Send Sensor Head Back for Calibration ............................................................................... 22
10 Sensor Specification of Semi-conductors for Freon Gases .................................23
11 Display..................................................................................................................25
11.1 Assembly, Disassembly ........................................................................................................ 25
11.2 Status LED............................................................................................................................. 26
11.3 Operation.............................................................................................................................. 26
11.4 Menu..................................................................................................................................... 26
11.5 Deadband ............................................................................................................................. 26
12 List of Spare Parts, Accessories ...........................................................................27
12.1 List of Spare Parts................................................................................................................. 27
12.2 Accessories ........................................................................................................................... 28
13 Specifications.......................................................................................................29
14 Type Examinations, Declarations of Conformity.................................................31
15 Decommissioning.................................................................................................37
16 Device Disposal....................................................................................................37
17 Definitions............................................................................................................37
18 History of Document Versions .............................................................................38

User Manual - PolyXeta®2 Detector with HL Sensor
for Refrigerant Gases - May_2020
Page 4
PolyXetais a registered trademark of MSR Made in Germany GAPX2_Freon_E_2020_05_18
Phone: [phone] Fax: [phone] Specification subject to change without notice
MSR-Electronic GmbH, Buergermeister-Schoenbauer-Str. 13, D 94060 Pocking www.msr-electronic.de
1Notes and General Information
1.1 Applicability
1. PolyXeta2 gas warning device with semi-conductor sensor for Freon gases and Ammonia,
series PX2-1…with Ex db protection, for zone 1 and 2
series PX2-2…with Ex nA protection, for zone 1 and 2
2. PolyXeta2 sensor head with semi-conductor sensor for Freon gases and Ammonia,
series SX1... with Ex db protection, for zone 1 and 2
1.2 Intended Use
The PolyXeta2 fixed gas detectors of the PX2-1 series are designed to detect and warn of Freon refrigerant
gases and Ammonia in the hazardous areas of zones 1 and 2 according to Directive 2014/34/EU.
The PolyXeta2 fixed gas detectors of the PX2-2 series are designed to detect and warn of Freon refrigerant
gases and Ammonia in the hazardous areas of zone 2 according to Directive 2014/34/EU.
The gas detectors are e.g. suitable for use in the chemical, petrochemical and offshore industry, etc. for
indoor and outdoor applications within the environmental conditions specified in the technical data.
1.3 For Your Safety
These operating instructions must be read and strictly followed by all persons installing, using, servicing and
inspecting the product. Furthermore, the operating instructions “Service Tool and Display for µGard2,
PolyGard2, PolyXeta2”must be read and obeyed if the PolyXeta2 has a display or if the Service Tool is
used. The product can only fulfil its intended functions if installed, used, serviced, maintained and controlled
according to the specifications of MSR-Electronic GmbH.
The factory settings of the measuring point, relay and system parameters and the device address are
documented in the configuration card supplied with each device on delivery.
1.4 Installer’s and Operator’s Responsibilities
It is the installer’s and operator’s responsibility to ensure that all PolyXeta®2 devices are installed and used
in compliance with all national and local regulations and requirements. The gas warning device must be
checked by an expert for correct installation and functioning before starting the measuring operation.
BGR 500 chapter 2.33 has to be applied in Germany.
The PolyXeta2 gas detector has been calibrated and tested for functionality at the factory before delivery.
When starting up, however, you have to perform and document a function testing using test gas.
1.5 Maintenance
Regular maintenance has to be performed according to the instructions in chapter 8.
1.6 Liability
MSR-Electronic GmbH will assume no liability if the device is not used properly or as intended. The installer
and operator are solely responsible for the interpretation and the use of the product.
If the product is not used, maintained or repaired according to the specifications in the user manual,
warranty and product liability claims as well as claims arising from any guarantees that MSR-Electronic GmbH
assumes for the product will lapse.

User Manual - PolyXeta®2 Detector with HL Sensor
for Refrigerant Gases - May_2020
Page 5
PolyXetais a registered trademark of MSR Made in Germany GAPX2_Freon_E_2020_05_18
Phone: [phone] Fax: [phone] Specification subject to change without notice
MSR-Electronic GmbH, Buergermeister-Schoenbauer-Str. 13, D 94060 Pocking www.msr-electronic.de
1.7 Approvals
The PolyXeta®2 gas warning device PX2-1 is approved for use in potentially explosive atmospheres of zone
1 and 2 by DEKRA Testing and Certification GmbH.
The PolyXeta®2 gas warning device PX2-2 is certified for use in zone 2 by the conformity declaration of the
manufacturer.
1.7.1 Marking and Certificates according to ATEX Directive 2014/34/EU
PX2-1 (Zone 1 und 2)
Sensorkopf SX1
PX2-2 (Zone 2)
Marking
II 2G Ex db IIC T4 Gb
0158
-25 °C < Ta < +60 °C
II 3G Ex nA IIC T4 Gb
-25 °C < Ta < +60 °C
EC Type Examination
Certificate
BVS 15 ATEX E 129 X
--
EG Konformitäts-
erklärung für Zone 2
--
CE_PX2_2_Zone2_1808
Protections
EN 60079-0: 2012 &
EN 60079-1: 2014 (Ex-db)
EN 60079-0: 2012 &
EN 60079-15: 2011 (Ex-nA)
1.7.2 Marking and Certificates according to IECEx only for PX2-1
Marking: Ex db IIC T4 Gb
-25 °C < Ta < +60 °C
IECEx Certificate Conformity: IECEx BVS 16.0038X
Protections: IEC 60079-0: 2011 & IEC 60079-1: 2014 (Ex-db)
1.7.3 Terms and Conditions for Safe Use
Temperature range -25 °C < Ta < +60 °C
Mounting position: wall mounting with the sensor head downwards

User Manual - PolyXeta®2 Detector with HL Sensor
for Refrigerant Gases - May_2020
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PolyXetais a registered trademark of MSR Made in Germany GAPX2_Freon_E_2020_05_18
Phone: [phone] Fax: [phone] Specification subject to change without notice
MSR-Electronic GmbH, Buergermeister-Schoenbauer-Str. 13, D 94060 Pocking www.msr-electronic.de
1.7.4 Listing of Freon Gases
MSR
Freon
group
MSR code
Freon
type
Calibration
gas
Group
Measuring
range
Relative
gas density
(air =1)
FR02
2061-01
R23
R23
HFC
2000 ppm
2.4
2061-02
R508b
R23
HFC
2000 ppm
> Air
FR03
2063-01
R1234yf
R1234yf
HFO
2000 ppm
> Air
2063-02
R452a
R1234yf
HFO
2000 ppm
> 1
2063-05
R455a
R1234yf
HFO
2000 ppm
> Air
2063-06
R454b
R1234yf
HFO
2000 ppm
> Air
2063-07
R1234ze
R1234yf
HFO
2000 ppm
> Air
FR04
2064-01
R123
R123
HCFC
2000 ppm
> Air
FR06
2070-01
R22
R22
HCFC
2000 ppm
3
2070-02
R401a
R22
HCFC
2000 ppm
> Air
2070-03
R401b
R22
HCFC
2000 ppm
> Air
2070-04
R402a
R22
HCFC
2000 ppm
> Air
2070-05
R402b
R22
HCFC
2000 ppm
> Air
2070-06
R403a
R22
HCFC
2000 ppm
> Air
2070-07
R408a
R22
HCFC
2000 ppm
> Air
2070-08
R409a
R22
HCFC
2000 ppm
> Air
2070-09
R411a
R22
HFC
2000 ppm
> Air
FR07
2077-01
R134a
R134a
HFC
2000 ppm
> Air
2077-02
R407a
R134a
HFC
2000 ppm
> Air
2077-03
R416a
R134a
HFC
2000 ppm
> Air
2077-04
R417a
R134a
HFC
2000 ppm
> Air
2077-05
R422a
R134a
HFC
2000 ppm
> Air
2077-06
R422d
R134a
HFC
2000 ppm
> Air
2077-07
R427a
R134a
HFC
2000 ppm
> Air
2077-08
R437a
R134a
HFC
2000 ppm
> Air
2077-09
R438a
R134a
HFC
2000 ppm
> Air
2077-10
R449a
R134a
HFC
2000 ppm
> Air
2077-11
R407f
R134a
HFC
2000 ppm
> Air
FR08
2080-01
R125
R407c
HFC
2000 ppm
4.2
2080-02
R32
R407c
CFC
2000 ppm
1.8
2080-03
R404a
R407c
HFC
2000 ppm
3.45
2080-04
R407c
R407c
HFC
2000 ppm
> 1
2080-05
R410a
R407c
HFC
2000 ppm
2.3
2080-06
R434a
R407c
HFC
2000 ppm
> Air
2080-07
R507a
R407c
HFC
2000 ppm
3.45
2080-08
R448a
R407c
HFC
2000 ppm
1.55
2080-09
R452b
R407c
HFO
2000 ppm
> Air
2080-10
R143b
R407c
HFO
2000 ppm
> Air
%LFL
2020-01
R32
R32
CFC
0–50 % LEL
1.8
2020-02
R455a
R455a
HFO
0–50 % LEL
> Air
2020-03
R454b
R454b
HFO
0–50 % LEL
> Air
2020-04
R1234yf
R1234yf
HFO
0–50 % LEL
> Air
2020-05
R1234ze
R1234ze
HFO
0–50 % LEL
> Air
Table 1.1: Available sensor heads for Freon gases

User Manual - PolyXeta®2 Detector with HL Sensor
for Refrigerant Gases - May_2020
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PolyXetais a registered trademark of MSR Made in Germany GAPX2_Freon_E_2020_05_18
Phone: [phone] Fax: [phone] Specification subject to change without notice
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1.7.5 Listing of Ammonia
MSR code
Freon
type
Calibration
gas
Measuring
range
Relative gas
density
(air =1)
S2125-C
R717
NH3
1000 ppm
0,59
S2125-F
R717
NH3
10.000 ppm
0,59
Table 1.2: Available sensor heads for Ammonia
2General Description
2.1 Device Description
The fixed gas detector type "PX2" consists of a sensor head and an I/O unit.
The series PX2-1 is approved according to ATEX and IECEx certified for zone 1 and 2.
The series PX2-2 is certified by the manufacturer’s ATEX declaration conformity for zone 2.
The sensor head consisting of the gas sensor and the evaluation, calibration and diagnostic electronics
is an independent unit in flameproof stainless-steel housing (Ex d) with an external thread NPT ¾ ".
All sensor data are stored in the sensor head. After the end of the calibration period or at the end of
the sensor lifetime, the sensor can easily be replaced by a calibrated or a new sensor head.
The I/O unit including the operating power supply communicates with the sensor head via the internal
local bus, monitors the communication and translates the measured value of the sensor head into a 4-
20 mA signal. The value of the gas concentration and other relevant data and status messages are
available on the central bus. The alarm relay is activated when the alarm threshold is exceeded. In
case of a fault the fault relay and the analog output change into fault state and the fault message is
transmitted via the central bus. An optional display unit with indication of the measurement values
and status LEDs can be integrated behind a viewing window. The I/O unit is installed in a flameproof
(Ex db for PX2-1, Ex nA for PX2-2) die-cast housing with up to four openings with NPT ¾ " female
threads according to standard ANSI B1.20.1 for receiving sensor head and cable glands.
2.2 Measurement Principles
See chapter 10 “Sensor Specification”.

User Manual - PolyXeta®2 Detector with HL Sensor
for Refrigerant Gases - May_2020
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PolyXetais a registered trademark of MSR Made in Germany GAPX2_Freon_E_2020_05_18
Phone: [phone] Fax: [phone] Specification subject to change without notice
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3Mounting Instructions
Check for completeness and accuracy using the delivery documents and the identification label
on the device.
3.1 Site of Installation
When choosing the mounting location, you have to consider the ambient conditions in order to get
representative measurement results. Please pay special attention to the following factors:
•External heat sources are not allowed on the installation site.
•Choose mounting location of the sensor according to the local regulations.
•Consider ventilation conditions! Do not mount the transmitter next to air passages or suction holes.
•The sample gas must pass the sensor even under adverse flow conditions. A flow test can be
performed for instance with smoke tubes.
•If the flow conditions are > 6 m/s, it is advisable to use a wind shield.
•Mount the transmitter at a location with minimum vibration and minimum variation in temperature
•In case of very difficult environmental conditions caused by dripping, splash, rain, condenser water
or dusts in the atmosphere, which are above the IP 65 dust and water protection, additional
accessories may be necessary to enable the use of the device. Please contact the manufacturer in
such cases.
•Provide adequate space around the sensor for maintenance and calibration work.
•The installation height depends on the relative gas density of the monitored gas type.
Freon
group
Gas
type
Relative density
(air = 1)
Recommended
mounting height
Calibraiton interval
FR02
R23
2.4
0.3 m above floor
12 months
FR03
R1234yf
4
0.3 m above floor
12 months
FR04
R123
> Luft
0.3 m above floor
12 months
FR06
R22
3
0.3 m above floor
12 months
FR07
R134a
>1
0.5 m above floor
12 months
FR08
R407c
2.3
0.3 m above floor
12 months
%LFL
R32
1.8
0.3 m above floor
12 months
R717 (NH3)
0.59
Ceiling
12 months
Table 3.1: Mounting heights
3.2 Installation Work
Assembly work must only be carried out under gas-free conditions.
The housing must neither be drilled nor be drilled through.
The installation position of the gas detector is always vertical, with the sensor head
downwards.
The mounting is done without opening the housing by using the two holes (D = 8 mm) of the fastening strap
with suitable screws. The exact dimensions are shown in the drawing "Dimensions and Mounting", fig. 3.1.

User Manual - PolyXeta®2 Detector with HL Sensor
for Refrigerant Gases - May_2020
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PolyXetais a registered trademark of MSR Made in Germany GAPX2_Freon_E_2020_05_18
Phone: [phone] Fax: [phone] Specification subject to change without notice
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Depending on the housing version the inlets 2 and 4
are tightly closed or closed by blind plugs.
Fig.3.1: Dimensions and Mounting
NPT 3/4”(ANSI B1.20.1)
Internal Thread
NPT3/4”(ANSI B1.20.1)
Internal Thread
Blank Plug
Entry 4
Entry 1
Entry 2
Entry 3
NPT3/4”(ANSI B1.20.1)
Internal Thread
Cable Glands
60
95
X= depending ontype
of cable gland
60
42 X
30
60 65
Sensor
Head
M30x 1,5
External Thread
Blank Plug
NPT 3/4”(ANSI B1.20.1)
Internal Thread
D=8
D=8
81,5
81,5
Mounting Plate
65
8
83
40
60

User Manual - PolyXeta®2 Detector with HL Sensor
for Refrigerant Gases - May_2020
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PolyXetais a registered trademark of MSR Made in Germany GAPX2_Freon_E_2020_05_18
Phone: [phone] Fax: [phone] Specification subject to change without notice
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4Electrical Installation
The instrument PX2-1 must only be opened under gas-free and voltage-free conditions.
The instrument PX2-2 should only be opened under gas-free and voltage-free
conditions.
The enclosed cable gland has to be checked for admissibility for the requested
requirements before installation in position “Entry 3”. If the instrument is supplied
without cable gland, a special cable gland approved for Ex protection class Ex db (PX2-1)
or nA (PX2-2) and for the requirements of the application has to be mounted there.
When inserting the cables, you have to strictly follow the instructions enclosed to the
cable glands.
No insulating sealing material must be poured into the NPT ¾ "threads of the cable
gland and blanking plugs because the potential equalization between housing and cable
gland / blind plugs is via the thread.
The cable gland / blind plugs must be tightened with a torque key with 15 Nm. Only
when doing so you can ensure the required tightness.
After completion of work, the instrument must be closed again. The cover has to be
completely screwed in and secured with the locking screw against inadvertent
loosening.
4.1 General Notes
•In the version with display, the terminals are located behind the display. The required disassembly
and subsequent assembly of the display is described in chapter 11.
•Only a professional should perform the wiring and the connection of the electrical installation
according to the wiring diagram in compliance with the relevant regulations and only when de-
energized!
•When connecting cables and conductors, please observe minimum length of 3 m according to EN
60079-14.
•Connect the housing to the equipotential bonding via the external ground terminal.
•Depending on the model there are female threads NPT ¾ inch on the housing at the positions "Entry
2 and 4" for placing additional cable glands. These inlets are factory sealed with original plugs. After
completing the installation work, make sure that all unused entries are closed with blind plugs
approved for Ex db (PX2-1) or nA (PX2-2) and for the requirements of the application. Thread adapters
for reducing the cable glands or dummy plugs are not admitted.
•All terminals are Ex e type with spring contact and push actuation. The permissible conductor cross
section is 0.2 to 2.5 mm2for single wires and multi-wire cables.
•Use cables with a braided shield with > 95 % coverage for compliance with the interference
immunity. The shield must be connected to the inside connection of the housing with a maximum
length of about 35 mm.
•For the recommended cross sections and lengths please refer to the table 4.1 "Cables".
•The analog output signal of warning devices without display can be used for the measurement
control. To carry out these regular checks with the housing closed it is recommended to lead the
analog signal out to the safe area via a cable.
•To comply with the requirements of servicing or operating the device without opening it, it is
possible to calibrate or operate the device remotely via the central bus. For this it is necessary to
lead the central bus out to the safe area via a cable.