REV 0, June 2005 Page 187
Operation Manual SUPREMA
7. Maintenance and Service
7. Maintenance and Service
Note Under certain conditions, some of the maintenance and service functions
described here can be nonfunctional in older versions of the hardware and software
of the SUPREMA system. For details, contact the MSA Customer Service office in
your area.
Warning: In the case of operation with catalytic combustion sensors: To
guarantee the unambiguity of catalytic combustion sensor operation it must be
made sure (e.g. by check with hand-held test instruments) each time before
turning on the sensors and the system that the environmental atmosphere to be
monitored by the sensors is free of combustible gases.
7.1 Maintenance and Adjustment
The system must be checked at regular intervals (not greater than 6 months) to ensure that it
is functioning properly in accordance with the EN 50073 and the applicable international, natio-
nal, industry-specific or company regulations, and the sensitivity and the zero point of the
connected sensors must be adjusted as necessary in accordance with the operating instructions
for the types of sensors connected to the system.
Sensors which are no longer able to generate the minimum signals must be replaced.
7.1.1 Passive Sensors
Before calibration, make sure that the sensors have recovered.
Note: At least 2 people are required to perform the calibration. To avoid
communication problems between Person 1 operating the SUPREMA and Person
2 supplying the sensors with gas, we recommend the usage of a set of appropriate
two-way radios.
Again, the required zero and test gases, test adapters, and hose connections (see operating
and maintenance instructions for the sensor) for supplying the gas are the necessary precondition
for a successful calibration.
The duration and flow rate of the zero and test gas supplys can be found in the operating and
maintenance instructions as well as the sensor data sheet for the sensor in question.
For the calibration, person 1 (at the SUPREMA) and person 2 (at the sensor in question) must
perform the following steps:
Person 1:
• Select the “Maintain/Calibration” menu.
• Select the input to be calibrated in the “Measure Point” field.
• Enter the gas concentration in the “Zero Gas” field.
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