Section 9: Calibration
Instruction Manual
April 2017
LIQ-MAN-1066
Auto Calibration
This screen appears after selecting
ph calibration
.
Note that pH auto calibration criteria can be changed. The following criteria can be adjusted:
• Stabilization time (default 10 sec.)
• Stabilization pH value (default 0.02 pH)
• Type of Buffer used for AUTO CALIBRATION (default is Standard,
non-commercial buffers).
The following commercial buffer tables are recognized by the analyzer:
• Standard (NIST plus pH7)
• DIN 19267
• Ingold
• Merck
This screen will appear if the auto cal is successful. The screen will
return to the pH Buffer Cal Menu.
The following screens may appear if the auto cal is unsuccessful.
1. A High Slope Error will generate this screen display:
2. A Low Slope Error will generate this screen display:
3. An Offset Error will generate this screen display:
9.2.1
1.234 µS/cm 25.0 ºC
S
N
pH Cal
Buffer Cal
Standardize
Slope: 59.16mV/pH
Offset: 600 mV
1.234 µS/cm 25.0 ºC
S
N
Setup
Stable Time: 10 sec
Stable Delta: 0.02 pH
Buffer: Standard
1.234 µS/cm 25.0 ºC
S
N
pH Auto Cal
Slope: 59.16 mV/pH
Offset: 60 mV
1.234 µS/cm 25.0ºC
S
N
pH Auto Cal
High Slope Error
Calculated: 62.11 mV/pH
Max: 62.00 mV/pH
Press EXIT
1.234 µS/cm 25.0 ºC
S
N
pH Auto Cal
Low Slope Error
Calculated: 39.11mV/pH
Min: 40.00 mV/pH
Press EXIT
1.234 µS/cm 25.0 ºC
S
N
pH Auto Cal
Offset Error
Calculated: 61.22mV
Max: 60.00mV
Press EXIT
68
Calibration
