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(1) Maintenance mode 1 Auto zero and span adjustment
1) Auto zero adjustment
①
Set the Mode switch at 1 to select
maintenance mode 1.
②
Make sure that there is no gas around the gas
detector then press down the BZ STOP key
until the Power lamp goes off.
③
The Power lamp lights up again and the
indicated value is automatically corrected to
zero.
④
Set the Mode switch at zero to return to normal
mode.
If the indicated value is outside the auto zero adjustment range when the BZ STOP key is pressed, the
message window will display a blinking “Err” indication and auto zero adjustment will be impossible. If this
occurs, carry out analog zero adjustment in maintenance mode 2.
MEMO
POWER
ALARM
2
1
RESET
BZSTOP
BACKUP
40
POWER
ALARM
2
1
RESET
BZ STOP
BACK UP
40
Off
POWER
ALARM
2
1
RESET
BZSTOP
BACKUP
40
On
Corrected
to zero.
POWER
ALARM
2
1
RESET
BZSTOP
BACKUP
Check that the
reading returns
to zero
