Technical data

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After installation and during the initial putting into operation gas warning equipment have to be
checked for function by an expert (see DIN EN 50073 section 6.4.1)
Maintenance comprises inspection, service, calibration and adjustment as well as the regular function
tests and repair.
A function test has to be effected before putting the transmitter into operation and at least once a
year. This test comprises:
• Check with alarm gas concentration
• Check of zeropoint and sensitivity (calibration)
• Response time
• Gas sampling system, gas processing (if any)
• Alarm signal activation
• Messaging devices for malfunctions
The test must be carried out by a specialist. The result must be noted in a written test report.
Service, Inspection, Calibration and Adjustments
Inspection shouls include a visual check of the gas warning equipment (for Germany see guideline
T 023, chapter 8.1).
• Mechanical damage
• Soiling by dust
• Condensate by moisture
• Protective devices for transmitter
• Diffusion inlet of transmitter
• Gas sampling system, gas processing system (if existing)
Service and inspection comprise all measures which are necessary to keep the original proper
working condition of the gas warning system. The inspection intervals must not exceed 4 months.
• Zeropoint
• Sensitivity with calibration gas
• Triggering of alarm thresholds
• Response time
• Messaging functions visually and audibly
• Failure messages
Service and inspection include a regular check and adjustment of sensitivity and zeropoint. The
proper functioning of the system is to be checked as well.
It is recommended to entrust GfG service with this task.
Regular Function Tests
Depending on the ambient conditions gas warning systems may behave differently. It is important,
therefore, to do a daily visual check particularly during the first few days after the initial putting into
operation.
In addition to the maintenance work the function of the gas warning system has to be checked in
regular intervals. This interval must not exceed 1 year (for Germany see guideline T023, chapter 8.5
and UVV-Gase §56)
Checks are to be effected by an expert, and the result have to be confirmed in writing.
Repair
Repair comprises all repair and replacement work. It must only be done by the manufacturer and by
persons who are authorised by the manufacturer – i.e. by GfG Gesellschaft für Gerätebau mbH. Only
original spare parts and original assemblies are allowed to be used, which are tested and authorised
by the manufacturer.