Crowcon Gasmaster - Page 33

Crowcon Gasmaster Menu system overview
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Menu Item Values (as shown on display) Description
Supervisor menu (allows system tests to be performed, and configurations to be changed. A pass
word is required to enter this mode, see section 3.7 for details.)
Inhibit All Inhibits all input channels when selected.
Values = Inhibit off Only whilst in Supervisor mode used for
Inhibit on calibration and test
Channels #1, #2, #3, #4 Allows individual channels to be inhibited.
Values = Inhibit off NB: Inhibit persists on exit from Supervisor mode
Inhibit on
Pellistor Saver Channels #1, #2, #3, #4 Protects pellistor-type sensors connected to mV
Values = Enabled or Disabled pellistor input modules from damage when exposed
to high gas concentrations. When enabled, the
system removes power from the sensor for a minimum
200 seconds if the signal exceeds 95%LEL.
Zero Zero Wizard
Select channel Use Down button to select the required channel to
Values = #1=name zero, then follow wizard instructions.
#2=name
#3=name
#4=name
Select channel Inhibit Inhibit option will not be displayed if channels
Values = Inhibit on have already been set to inhibit using the menu
Inhibit off shown above.
User confirmation Reminds the user to check that the detector has been
Only continue if in clean air! zeroed and is currently not seeing gas.
Result
Values = Pass Channel has correctly zeroed
Fail Input signal was out of acceptable range, re-zero the
detector and check that its output current is 4 mA.
Calibrate Calibration Wizard
Select channel Use Down button to select the required channel to
Values = #1=name calibrate, then follow wizard instructions.
#2=name
#3=name
#4=name
Cal #1 level
Values = 25% - 100% Refers to the calibration gas concentration
of range
Calibration is only possible with a gas concentration
that is at least 25% of the full range of the sensor.
Use the UP and Down buttons to enter the concentra-
tion of the calibration gas (e.g. 50% LEL,10 ppm etc.).
Gasmaster will store the gas value entered so that it
does not need to be adjusted next time the sensor is
calibrated.
Select channel Inhibit Inhibit option will not be displayed if channels have
Values = Inhibit on already been set to inhibit using the Inhibit menu.
Inhibit off