Operation Crowcon Gasmaster
20
First the Local Service telephone number is dis-
played followed by the customer identity display.
After 10 seconds the serial number will automati-
cally be displayed on the next screen (for approxi-
mately 4 seconds).
The Continue
button can be used to advance to
the next screen. Use the Back
button to return
to the previous screen. The display will return to the
normal operating display when finished.
3.5 Using the menu system
To enter the menu system press the Continue
button. The menu system can be accessed during
normal channel monitoring, alarm or fault condi-
tion. The message area will display the following
screen:
MENU:
Faults
Note: if the menu system has been accessed
previously, the menu item displayed will be the
last actioned menu item. For example, if you were
using Supervisor mode the last time, the menu
display will show this:
MENU:
Supervisor
Use the Up and Down buttons to scroll
through the menu list. To exit the menu press and
hold the Accept/Reset button or press Back
button as many times as necessary.
Menu display
The top line of the message area displays the
current menu level. Some menu levels have
submenus and wizards that guide you through
configuration. The lower line displays the menu
item, value or setting.
Use the Up
and Down buttons to scroll
through the menu list, press Continue
to
select the menu item.
Refer to figure 3.5 on page 25 for an overview of
the menu system.
Menu wizards
Wizards are an extension of the menu system to
guide the user through a process such as calibra-
tion. A wizard menu will consist of selections,
user prompts and display status conditions during
the process.
The Back
button can be used to return to the
previous screen or abort the wizard. The Down
and Up
buttons are used to alter a selection.
The Continue
button accepts the current
selection and continues to the next step of the
wizard.
Wizards are available for Zero and Calibration
menus in Supervisor menu.
3.6 Inhibiting channels
Inputs can be temporarily inhibited so as not to
cause alarms. This may be necessary when calibrat-
ing 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 the Menu System Overview on page 25
for details on how to access this function.
When inhibited Gasmaster will:
Display the 'inhibit' symbol
on the
channel display for each affected chan-
nel.
Illuminate the yellow 'Warning' LED.
In the event of an alarm on an inhibited channel,
Gasmaster will:
Illuminate the Alarm symbol
on the
channel display for the affected channel.
Illuminate the red alarm LED bar.
Display the alarm text message for the
affected channel.
Gasmaster will not:
Operate any relays associated with the
affected channel.
Drive external audible visual alarms.
Activate the internal sounder.
If it is necessary to permanently disable a chan-
nel, enter Supervisor Mode and set the relevant
detector Type to Unused (see section 3.10 on page
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