Manual Temperature Compensation
If the use of a temperature probe is inappropriate, e.g. small sample size then manual
temperature compensation can be used.
1.
Disconnect temperature probe
2.
Press the Mode key to select °C function. Note that the °C flag will flash when no
temperature probe is connected.
3.
Use the òñ keys to adjust the displayed reading to the temperature of the first buffer.
4.
Press the Mode key to return to pH function.
5.
The meter may now be calibrated automatically or manually following either of the
procedures above.
Refer to the recorder instructions
1.
Connect the recorder via the red and black 4mm sockets on the back panel. (Red
positive, Black negative)
2.
Ensure that the recorder is set for the appropriate range, i.e.
Section 3 -
mV Calibration and Measurement
The mV mode has two ranges. The meter will automatically select the most appropriate
range as follows:
0 to ±400mV with resolution 0.1mV
±400mV to ±2000mV with resolution 1mV
Absolute mV
1.
Connect the electrode(s)
2.
Press the Mode key to select mV function
3.
Clear any existing data. (Press Clear for 5 seconds)
4.
Absolute mV readings may now be made by immersing the electrodes in the
sample and recording the reading.
Relative mV
Follow e procedure for Absolute mV from
1.
to
3.
4.
Immerse electrode(s) in the standard or blank solution. Wait for a stable
reading and press BUF 1. The display will automatically zero and the CAL flag will
be displayed.
5.
mV values relative to the standard solution may now be taken by immersing in
the sample and recording the reading.
Section 4 -
Use of the Recorder Output
Mode
Range
Display
Recorder
pH
0-200
7.00pH
70.0mV
mV
±200
500mV
50.0mV
°C
±200
25.0°C
25.0mV
