Installation & Operation Manual Merlin
IOM
Rev: 05 01-20
12
Servicing & General Maintenance
DO carefully remove any accumulated dust from the outer enclosure once a month.
NEVER use detergents or solvents to clean your device – this may permenantly or temporarily
damage the gas sensing elements.
NEVER spray lighter gas, paint or other aerosols near detectors or monitors.
NEVER paint the device. Paint will seal vents and may interfere with the device.
Bump Testing
What is bump testing?
‘Bump testing’ is a term used for checking a gas detector is functioning correctly by exposing it
to the target gas. A known concentration of the target gas is applied to the sensor to trigger an
alarm condition and ascertain the detector is working safely.
Why is it important?
A detector may visually appear in good 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?
A ‘bump test’ takes seconds and is often completed alongside a scheduled fire alarm test. We
recommend this is done at least weekly to reduce the risk of a detector not performing,
however the frequency should be determined from a risk assessment by the end user.
Please remember, ‘bump testing’ does not remove the need to have gas detectors inspected,
calibrated and serviced periodically by a trained engineer.
For more help and advice on bump testing, calibration and service – contact us.
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.
Avoid exposure of high concentrations of alcohol found in many products, this can damage,
deteriorate or affect gas detectors. For more information refer to your detector manual.
