AGS Mini Merlin Installazione Funzionamento e manutenzione - Pagina 14
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Installation, Operation & Maintenance
MAINTENANCE & TESTING
Cleaning
Keep your device in good working order - follow these basic principles;
Remove any dust/debris from the outer enclosure regularly using a slightly damp cloth.
Never use detergents or solvents to clean your device.
Never spray air fresheners, hair spray, paint or other aerosols near the device.
Never paint the device. Paint will seal vents and interfere with the device.
High concentrations of alcohol found in many products may damage, deteriorate or affect the gas sensing
elements – such as; wine; deodorants; stain removers; thinners!
Other gases and substances to avoid; Corrosives (i.e. chlorine & hydrogen chloride); Alkali metals; Basic
or acidic compounds; Silicones; Tetraethyl lead; Halogens and halogenated compounds!
Manual Operation Test
This option gives the user the opportunity to test each relay/output in response to gas.
When the touch button is pressed and held during normal operation the mini-merlin will simulate an open
circuit to ensure all configured systems, outputs, alarms, indications and other external devices operate as
intended in response to gas.
Gas Testing Overview
A detector may visually appear in good order, but its sensitivity can be inhibited by external factors such
as, dust; humidity; temperature fluctuations; cleaning products; contaminants or sensor drift (ageing). All
can cause a decline in sensitivity and eventual failure.
Regular 'bump' tests are important to make sure a device is able to detect a release of gas as early as
possible. We recommend that gas tests are carried out at least annually from the date of installation,
however the frequency should be determined following a risk assessment by the end user and in
accordance with any applicable law/code.
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. 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.
For more information on this, contact us.
Gas Sensor Types & Reaction Times
The time for gas sensors to react to their target gas will vary dependant on the type of gas detector/gas
sensing element. You should always refer to the appropriate specification for information including sensor
type and alarm levels i.e. electro-mechanical sensors (such as Carbon Monoxide) will react to its target
gas slower than semi-conducting sensor types (such as methane, LPG and Hydrogen).
Rev: 20 12-20
Mini-Merlin
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