Crowcon Crowcon Gasmaster, Installation, Operation And Maintenance Manual, Page: 27 / 48

Crowcon Gasmaster Operation
23
Whilst in pellistor saver mode the channel display
will display ‘or’ to indicate the sensor has been
exposed to an excessive gas concentration. A hor-
izontal bar sequences top, middle, bottom while
the 200 second timer is active, and the centre bar
only flashes when the timer is complete and the
channel is ready to be reset.
Figure 3.4
2
0 0 LE L
ALARM
Channel #1
#1=Det
Note: it is strongly recommended that sensors
are re-balanced and re-calibrated after exposure
to high gas concentrations.
Note: the pellistor saver mode can be disabled
for each channel if required. The ‘Warning’ LED
will remain active while any channel has pellis-
tor saver disabled; after 15 minutes the pellistor
saver function will automatically be re-enabled
(it can also be re-enabled at any time using the
Supervisor menu).
Functions where Pellistor Saver mode will be
disabled:
•฀ When฀ the฀ Pellistor฀ Saver฀ mode฀ is฀ set฀ to฀
‘Disabled’ manually.
•฀ When฀ the฀ channel฀ is฀ in฀ ‘Inhibit’฀ state฀ (note:฀
when using the Calibration function Pellistor
Saver will be enabled if the channel is not
inhibited). Note: the channel will remain in
Pellistor Saver Disabled mode until it is manu-
ally re-enabled or the 15-minute time-out
period has lapsed.
•฀ When฀ the฀ ‘Sim฀ input’฀ function฀ is฀ used฀ to฀
ramp-up the channel gas reading. Note: the
channel will remain in Pellistor Saver Disabled
mode until it is manually re-enabled or the
15-minute time-out period has lapsed.
Pellistor Saver mode reverts to ‘enabled’ after
power to the Gasmaster is removed and re-applied.
Refer to Supervisor menu section for details on
enabling/disabling the Pellistor saver mode.
3.10 In the event of a fault
In the event of a fault the fault LED will illuminate
and the internal sounder will activate. The message
area will display
FAULT
: and fault ID number. The
fault description will appear in the lower portion of
the message area, messages longer then 16 char-
acters will be scrolled across the screen.
Pressing Accept/Reset will clear the fault message
from the display. To display a list of all faults pre-
sent, use the faults menu.
A list of faults can be found in the "Menu system
overview" on page 24.
3.11 System Configuration
Your Gasmaster system is supplied pre-config-
ured, however, you may wish to configure relay
and alarm settings to suit your requirements or
adjust detector values, carry out calibration and
other confidence checks. Your Gasmaster system
can be configured using the Operator Panel and
Menu System. You will find details of the menu
structure and configuration options over the next
few pages, refer to Figure 3.5 on page 25 for
an overview of the menu structure.
To edit your systems configuration you must enter
the Supervisor mode which is password protected
to prevent miss-use or accidental change. (Refer to
section 3.7 for details on entering Supervisor mode.)
For more information on testing your Gasmaster
system, please go to section "Maintenance" on
page 35.
Gasmaster PC software is available which enables
full system configuration from a PC. An optional
communications port is required if Gasmaster PC
is to be used, contact Crowcon for details.
3.11.1. Re-configuring a channel
Your Gasmaster system is supplied pre-config-
ured, but you may require to re-configure when a
detector is changed or a new detector is added.
This section provides details on configuring chan-
nels, refer to page 33 ‘Channels #1 to #4’ from
the Supervisor configuration menu.
3.11.2. Limitations
If Gasmaster is used in a manner not specified in this
manual, the protection provided may be impaired.