Crowcon Crowcon Gasmaster, Инструкция по установке, эксплуатации и обслуживанию, Страница: 39 / 48

Crowcon Gasmaster Maintenance
35
4. Maintenance
It is essential that any safety system such
as Gasmaster is routinely checked. Crowcon
offer service contracts to ensure that this
equipment is fully operational at all times.
As a minimum, Crowcon recommend that
systems are calibrated and tested on a six-
monthly basis. Sensors should be changed as
advised in the detector manual.
Note: a ‘calibration due’ warning message may
be flagged six months after the last service*. The
warning LED

will light and the message will
be shown in the "Warnings menu (lists warn-
ings present on the system)" on page 26. This
message can be reset using Gasmaster PC, which
also allows the period after which the message is
displayed to be adjusted.
*Or when the system was last powered-up.
4.1 Functional Testing
Gasmaster allows you to test relays, force inputs
into alarm state, and force analogue outputs to
verify the correct operation of the Gasmaster sys-
tem and its interfaces with external equipment.
These functions are available in the
Supervisor
menu under Test .
Please note that using this function will activate
the appropriate relays, audible visual alarm drives
and analogue outputs. Ensure necessary precau-
tions are taken prior to using test functions.
The options available in Test can be found in sec-
tion 3.11 on page 23, along with a description
of each function.
4.2 System Inhibit
Inputs can be temporarily inhibited so as not to
cause alarms. This may be necessary when cali-
brating detectors, or when operations are carried
out close to a sensor which may trigger an alarm
(for example soldering near a smoke detector).
Input channels can be inhibited individually or
all at once. The 'inhibit' option is available in the
Supervisor
menu, see section 3.6 on page 20
and the Menu System Overview on page 25 in
the
Operation chapter for details of this function.
If it is necessary to permanently disable a channel,
enter Supervisor mode and set the relevant detec-
tor Type to Unused (see page 33). The channel
display will be no longer shown, and the power
supply will be removed from the detector.
Warning
Crowcon strongly recommends that remote inhibit
switches be key operated only, and that access
to the key should be restricted to authorised
personnel. A Gasmaster system that has been
inhibited without other safety precautions being
in place may not provide the protection for which
it was designed. Steps should be taken to ensure
that all appropriate personnel are aware when a
Gasmaster system is inhibited.
How to perform Inhibit
1. From the normal operating display, press
the Continue button to enter the
menu system.
2. Use the Up and Down buttons as
necessary to select Supervisor and
press
Continue
.
3. Enter the password (the default pass-
word is ZZZ), press Continue .
See section 3.7 in Operation for details
on entering
Supervisor mode .
4. How to set global inhibit:
From the Supervisor menu, scroll down
to Inhibit and press Continue . Select
All and press Continue . Use the Up
or Down button to set inhibit to
INHIBIT ON, press Continue to
accept. Use the Back button to return
to the Supervisor menu. The Inhibit
icons will appear on the channel display.
How to set channel inhibit:
Channel inhibit can be selected from
the
Inhibit menu or within the Zero or
Calibrate menu. Follow the instructions
provided above, selecting the Channel
#n (where n represents the channel
number) in place of All .
Ensure all inhibits are removed when
maintenance activities are complete.