GAS Gasmaster, Installation, Operation And Maintenance Manual

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3. You will be asked to enter a password, press
Continue  .
The default password is ZZZ (uppercase), use the Up
 and Down  buttons to enter the first character
of the password.
Note: Double click the Up  or Down  button to
move to the top or bottom of the alphabet list. To
enter numbers or lower case characters, continue
pressing the Up
 or Down  button.
When you have selected the correct character,
press Continue  , the cursor will move to the next
character position. Continue entering the rest of
the password. When you have finished press the
Continue

button twice.
(See 3.7 in section III. Operation for details of
entering text strings).
4. The Zero Wizard offers temporary Inhibit but
you may wish to Inhibit all channels during the
calibration process.
How to set global inhibit:
From the Supervisor menu, scroll down to Inhibit
and press Continue

. Select All and press Continue
 . Use the Up  and 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.
5. From the Supervisor menu, use the Up  and Down

buttons to select Zero by pressing the Continue
button  .
6. Select the channel to apply zero. Press the Continue
button to step through the Zero Wizard.
7. Press Continue when ‘…Only continue if in clean
air!…’ is displayed, ensure the detector has been
correctly zeroed first (i.e. 4 mA) Press Continue to
apply Zero now.
Gasmaster will display ‘Pass’ when zero is successful
or ‘Fail’ if the detector zero is out of range.
8. Use the Continue  button to Zero other channels
or Back button to the Supervisor menu to continue
calibration.
Calibration
1. Follow points 1 to 3 above in Zero adjustment to
enter Supervisor mode.
2. Before you commence calibration, ensure the
channels are inhibited prior to applying gas.
Channels can be inhibited globally or individually.
Follow the instructions given in step 4 in Zero
Adjustment.
3. From Supervisor menu, scroll down and select
Calibrate.
4. Select the channel to calibrate. Press the Continue

button to step through the Calibrate Wizard.
Ensure the channels are inhibited prior to applying
gas.
5. The next wizard screen displays the default
calibration gas concentration as 50% of range. If
necessary this calibration figure must be adjusted to
match the concentration of the calibration gas used.
Adjust the value using the Up

or Down

buttons
as necessary and press Continue  .
6. When “Apply Gas” is displayed, apply gas to the
detector and press Continue  , allow readings to
settle.
7. Press Continue when the reading on the appropriate
channel is stable, and the detector has been
calibrated according to its instructions.
Gasmaster will display
‘Pass’
when successful or
‘Fail’
if the detector signal is out of range.
8. Calibration is complete when ‘Purge’ is displayed,
remove the gas from the detector.
Use the Continue  button to calibrate another
channel or Back

button to exit Supervisor mode
and return to the main display.
9. Ensure that all channel inhibits are removed after
calibration is complete.
2. Installation