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１９
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7-6 Maintenance
Function
NV-100C has maintenance mode function. Select a mode using the Mode switch to use each function. Functions
of modes are described in the following table.
Mode switch no.
Mode name
Function
Remarks
0 Normal
mode
Normal state to monitor
gas leakage
・
Use the equipment in this mode.
1
Maintenance
mode 1
Auto zero and span
adjustment
・
Press the button to adjust zero point and span
automatically.
・
Use this adjustment for minor zero point and
sensitivity corrections.
・
Alarm contact and buzzer contact do not
operate.
2
Maintenance
mode 2
Analog zero and span
adjustment
・
Turn the volume to adjust the zero point and
span..
・
Use this method for most adjustments.
・
Cancel auto zero and span function.
・
Cancel zero suppression function.
・
During pressing the Enter key, linearization
is cancelled.
・
Alarm contact and buzzer contact do not
operate.
3-9
−
Only used for adjustment
at factory
・
Do not use them.
When adjustment in a mode is completed, always set the Mode switch at zero to return to normal mode. If
the switch is left at other mode, the equipment cannot alarm gas leakage correctly.
Message window displays “preset value” and “ ” alternately during maintenance mode to
prevent you from forgetting to return to normal mode after adjustment.
Do not change the setting for modes 3 to 9. If the setting is changed, the equipment cannot properly alarm
you of a gas leakage.
WARNING
Use auto zero and span adjustment daily for minor zero point and sensitivity corrections, and use analog zero
and span adjustment for normal corrections.
MEMO
Re-check the following items in normal mode after zero and span adjustments are performed in maintenance
mode 1 and maintenance mode 2.
・
The zero point is correctly indicated at zero.
・
The gas concentration is correctly indicated when calibration gas is applied.
CAUTION
