Issued: 01-05-2012 Revision: 1.0 Copyright 2012 Agilent Technologies
Page 8 of 13
Resistance: nearly 10 kΩ·m
3.3 Manual Temperature Verification
Disconnect all of the electrodes and probes from the meter.
In the measurement mode, the temperature display should be 25.0±0.1°C
3.4 pH Electrode Calibration (Meters with pH function)
The calibration points should cover the expected pH range of the samples to be measured.
The calibration points should be not less than 1 pH unit apart and not more than 4 pH units
apart. Fresh buffers should be used for each calibration.
Prepare the electrode and ATC probe (if necessary). Connect the electrode and ATC
probe to the meter.
Select appropriate standard solution and press [Calibration] key from the meter
interface.
Clean pH electrode, reference electrode (if separated) and ATC probe (if separated).
Put them in the buffer to be calibrated.
When the reading becomes stable, press [Enter] key and the meter will display
‘Storing……’ and save calibration data.
Repeat until all buffers are calibrated.
After calibration, you could review the actual electrode slope, in percent. The slope
must be in the range of 90% to 102%.
3.5 ISE Electrode Calibration (Meters with ISE function)
The calibration standards should cover the expected concentration of the samples to be
measured and the calibration range should be at least ten times greater than the lowest
calibration point. Control the calibration solution and sample solution at the same temperature.
If not, the measuring accuracy and reproducibility will be affected. Calibrate ISE in these
solutions from low concentration to high concentration. Fresh standards should be used for
each calibration.
Prepare the ISE and ATC probe (if necessary). Connect the electrode and ATC probe
to the meter.
Select ion mode and press [Calibration] from the meter interface.
Clean ISE and ATC probe (if necessary). Put them in standard solutions to be
calibrated in order from low to high concentration.
When the reading becomes stable, press [Enter] key and the meter will display
‘Storing……’ and save calibration data.
Repeat until all buffers are calibrated.
After calibration, you could review the actual electrode slope, in percent. The slope
must be in the range of 90% to 102%.
3.6 DO Probe Calibration (Meters with Dissolved Oxygen function)
Prepare the DO probe and connect it to the meter.
You may select either ‘Zero Oxygen Calibration’ or ‘Full Scale Calibration’ from the
meter interface.
Full Scale Calibration:
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