User Manual - PolyXeta
®
2 Detector with HL Sensor
for Refrigerant Gases - May_2020
Page
19
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
-
Check alarm relay: (Only necessary if the alarm relay is used)
o
Apply
test gas with a concentration ≥
of the set alarm threshold. The alarm relay must
change into the alarm status and the actuated device goes into alarm.
-
- Check analog output: (Only necessary if the analog output is used)
o
Apply test gas. Check the proper reaction of the connected actuator.
-
- Check central bus: (Only necessary if the central bus is used)
o
Apply test gas. Read the concentration of the test gas on the controller and check the
corresponding reactions.
The functional control must be documented by a protocol stating at least:
Identification of the gas detector, type and concentration of the zero gas and test gases used, display before
and after calibration with zero and test gas, response time, deficiencies fixed and measures started with the
date and name of the person responsible for the functional check.
8.3
System Check / Proof Test
Measuring and testing equipment used within of the proof test (multimeters, etc.), must be in a proper state.
To meet this requirement, the measuring devices have to be calibrated at regular intervals.
The system control has to be carried out by a qualified person at least every 12 months and includes at least
the following activities:
-
Visual inspection according to chapter 8.1
-
Functional check according to chapter 8.2
-
Check the relevant parameters for deviations:
o
Alarm threshold(s)
o
Assignment and activation of alarm relays
o
Gas type
o
Measuring range
-
Check 4-20 mA output signal: only when current signal is used in the application.
o
Status Fault = < 2 mA:
Activate the special mode on the display or service tool. The connected evaluation unit
must recognize and output the error status.
o
Linearity and accuracy:
The set value of the analog output signal is determined in dependence of the test gas
concentration and the measurement range according to the formula [1].
Apply test gas: The connected evaluation unit must react according to the current signal
calculated with the formula [1].
-
Check fault relay:
o
Activate the special mode on the display or service tool. The fault relay changes into the
alarm status and the connected fault indication unit must report an alarm.
The system check must be documented by a protocol stating at least:
Identification of the gas detector and the downstream safety equipment, type and concentration of the zero
gas and test gases used, display before and after calibration with zero and test gas, parameter deviations
from the set values, response time, deficiencies fixed and measures started, as well as the date and name of
the person responsible for the system check.
