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(3) Analog zero and span adjustment (Maintenance mode 2)
①
Set the Mode switch at 2 to select maintenance
mode 2.
②
Press down the BZ STOP key until the Power
lamp goes off.
③
The Power lamp lights up again and the auto
zero adjustment value is reset.
④
Make sure that there is no gas around the
gas detector. Press the enter key and
simultaneously turn the zero adjustment
volume (ZERO) to set the indicated value on
zero.
⑤
Set the Mode switch at zero to return to
normal mode.
The maintenance mode 2 shows indications with the auto zero and span functions and the zero
suppression function cancelled. Therefore, the indicated values in this mode may differ from those in normal
mode.
Always reset auto zero and span adjustment values during analog zero or span adjustment. If you fail to do
so, zero and span adjustment cannot be carried out correctly.
Indicated values with linearization cancelled are displayed while the Enter button is being pressed.
MEMO
POWER
ALARM
2
1
RESET
BZSTOP
BACKUP
Peak
hold
value
POWER
ALARM
2
1
RESET
BZSTOP
BACKUP
Off
POWER
ALARM
2
1
RESET
BZSTOP
BACKUP
On
POWER
ALARM
2
1
RESET
BZSTOP
BACKUP
Adjust
to zero.
POWER
ALARM
2
1
RESET
BZSTOP
BACKUP
Check to see if
the indicator
reads 0.
