User Manual - PolyXeta
®
2 Detector with HL Sensor
for Refrigerant Gases - May_2020
Page
22
PolyXeta
is a registered trademark of MSR
Made in Germany
GAPX2_Freon_E_2020_05_18
Phone: +49 8531 9004-0 Fax: +49 8531 9004-54
Specification subject to change without notice
MSR-Electronic GmbH, Buergermeister-Schoenbauer-Str. 13, D 94060 Pocking
www.msr-electronic.de
9
Exchange of Sensor Head
Instead of performing a field calibration you can simply and comfortably replace the sensor head in the field
by a calibrated one. At the end of sensor lifetime, it is the same procedure.
9.1
General Notes
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.
No insulating sealing material must be poured into the NPT ¾ "threads of the cable
glands because the potential equalization between housing and cable gland is via the
thread.
The sensor head must be tightened with 15 Nm using a M24 wrench. Only when doing so
you can ensure the required tightness.
After completion of work, the gas warning device must be closed again. The cover has to
be completely screwed in and secured with the locking screw against inadvertent
loosening.
9.2
Exchange of Sensor Head
-
Select Special Mode.
-
Disconnect the sensor head plug in the housing and stretch the cord so that it can follow the rotation of
the sensor head.
-
Loosen the sensor head with a wrench (M24).
-
Unscrew the sensor head carefully; stretch the cable slightly at the same time so that it can follow the
rotation.
-
Take the new sensor head out of the original packaging.
-
Check gas type and measuring range for conformance.
-
Check calibration protocol and date for validity.
-
Insert the cable of the sensor head into the housing and stretch it slightly.
-
Screw the sensor head carefully in; stretch the cable slightly at the same time so that it can follow the
rotation.
-
The sensor head must be tightened with a torque key with 15 Nm. Only when doing so you can ensure
the required tightness.
-
Plug the sensor head in again; the communication of sensor head <> I/O board then will start
automatically and will be checked for validity.
-
Exit special mode.
-
The internal diagnostic checks the new sensor head for gas type, measuring range and valid calibration
status. If they match, the measurement mode will start automatically.
The replacement of the sensor head is a security relevant intervention requiring the recommissioning of the
gas detector.
9.3
Recommissioning
You have to perform the recommissioning after a safety-related intervention, e.g. exchange of the sensor
head.
During recommissioning you have to carry out and document all steps according to the chapters 5.1 to 5.4
incl. a functional test.
9.4
Send Sensor Head Back for Calibration
