CGS Merlin GDP2 Guide D'installation Et D'utilisation page 11

Installation & Operation Manual
Maintenance
Cleaning
To keep your control panel in good working order - follow these basic principles;
Remove any dust/debris from the outer enclosure regularly using a slightly damp cloth.
•
Never spray air fresheners, hair spray, paint or other aerosols near gas detecting devices.
•
Never paint the device.
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It is recommended that any detectors connected to the system are inspected and serviced at least
•
annually from the date of installation for optimum performance and protection.
Bump Test (Gas Response Check)
What is a Gas Response Check?
Response checks are often referred to as a 'BUMP TEST'. Bump tests are important to make sure a gas
detection device is able to detect a release of gas as early as possible.
The aim of the bump test is to make sure a gas detector is working at its optimum by briefly exposing the
unit to a known concentration of the target gas that exceeds the highest alarm point. If the detector goes
into alarm and all system outputs/relays activate, then it is working safely.
If the system fails to operate as intended in an alarm state, the gas detector must not be used until a full
inspection and service has been conducted.
Why is it important?
A detector may visually appear in good working order, but its sensitivity can be inhibited by external
factors. Dust, humidity, temperature fluctuations, cleaning products, contaminants or sensor drift
(ageing) can cause a decline in sensitivity and eventual failure.
Regular bump tests are important to make sure the detector is able to detect a release of gas as early as
possible.
How often should I Bump Test a detector?
Regular bump tests are important to make sure the detector is able to detect a release of gas as early as
possible. A bump test usually takes seconds (gas type dependant) and is often completed alongside a
scheduled fire alarm test, however the frequency should be determined following a risk assessment by
the end user. Remember, bump testing does not remove the need to have gas detectors inspected,
calibrated and serviced periodically by a trained personnel.
What equipment do I need to perform a Bump Test?
Contact your CGS representative for details of suitable bump testing kits and gases.
Kits usually consist of a certified gas cylinder; flow control regulator, tube pipe and applicator cone
ISSUE: 02 01-22 EN
Merlin GDP2
11