Manual

8 Maintenance 8-2. Gas calibration method
- 65 - GD-70D
Zero Adjustment
PW A1 A2 F LCD
2-1.ZERO
Press the SET key.
● ○ ○ ○
2- 1
ZERO
MAINTENANCE
↓
Current Concentration Value Display
Press the SET key to perform the zero
adjustment.
● ○ ○ ○
1.1ppm
ZERO SET
MAINTENANCE
↓
Zero Adjustment Completed
The menu returns to 2-1.ZERO
automatically.
● ○ ○ ○
0.0ppm
ZERO OK
MAINTENANCE
↓
Return to 2-1.ZERO
* When the zero adjustment fails
● ○ ○ ○
0.0ppm
ZERO NG
MAINTENANCE
↓
Return to 2-1.ZERO