User Manual

GasMaster Mantenance

4.3 Detector Calibration

Crowcon recommends that you check detectors routinely to ensure correct calibration and operation.

Gas detectors require recalibration at least every 3 to 6 months. Fire detectors should be tested with the same frequency. Site procedures may require more frequent testing. See section 2.12.1 page

12 for calibration instructions.

For detailed instructions on the routine functional testing of detectors, please refer to the relevant

Installation, Operating and Maintenance Instructions provided with each detector.

4.4 Changing Batteries

During routine servicing, it is recommended that the power be isolated form Gasmaster temporarily to ensure that the back-up batteries are operational. Crowcon recommend that batteries are changed every two years, and replaced as a pair.

Replacement batteries should be Yuasa UCEL

Y1.2-12, 12 v 1.2 Ah C20 lead-acid type cells.

A 10 A fuse is fitted to the batteries, for replacement part number see Spare Parts and Accessories section.

Batteries

Battery connection diagram

Warning

When replacing batteries, care should be taken to ensure cables are re-fitted as shown on the battery connection diagram. Incorrect fitment of battery cables may result in a fire and/or harm to personnel.

4.5 Module Replacement

In the unlikely event of a Gasmaster component failure, Crowcon recommend that repair should not be undertaken by anyone other than Crowcon approved personnel. Please contact Crowcon for details of your nearest service centre.

4.6 Event logging

Gasmaster records alarms, faults and display panel button activities in an Event Log. A maximum of 300 events are logged, after which data is over-written on a first-in-first-out basis. This function provides a record of all system activities which can be uploaded using Gasmaster PC software at any time.

The event log is held in RAM (volatile memory), so in the event of a complete power failure all data will be lost.

4.7 Service card

A card is fitted to the inside of the front cover for logging service activity. It is recommended that this card be filled in with the dates of services, and details of any parts replaced.

4.8 Cleaning

If required, the outside of the Gasmaster case can be cleaned by gently wiping with a damp cloth using a mild soap solution only.

Figure 4.1 Battery replacement

Batteries should be checked regularly on units operating over 40ºC.