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3.10 Performing Measurements
To perform measurements in pH, mV or temperature modes the following should be carried out:
1.
mV Measurement
a) Connect the electrode to the unit via the BNC socket on the rear panel. If a separate
reference electrode is to be used, this should be connected to the
Ref
socket.
b) Select
mV
mode using the Up/Down arrows. The display will show the electrode output
directly in mV.
2.
Temperature Measurement (using ATC)
a) Connect the ATC probe to the unit via the
Temp
socket on the rear panel.
b) Select
°C
or
°F
via the Set up menu.
The secondary display will show ATC probe temperature directly in °C or °F.
3.
Temperature Measurement (Manual)
a) If Manual temperature compensation is being used, the preferred measurement range
should be selected via the Set Up menu.
b) Immerse the electrode into the solution and set the to the solution temperature via the Set
Up menu.
4.
pH Measurement
a) Perform a calibration sequence using manual or automatic temperature compensation.
b) Immerse the electrode(s) into the solution to be measured and note the results once the
reading has stabilised.
NOTE:
Ensure the pH/Reference probe combination are compatible with the samples being
measured. Non-compatibility may be indicated by drifting readings, noise or shortened
electrode life. During use the electrode must be rinsed between each measurement to
eliminate contamination of solutions. Excess droplets of solution may be removed by
gently blotting with filter paper or tissue.
For further details refer to Section 3.5-Good Practice Guidelines.
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