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4.2
Calibration without Temperature Probe
4.2.1 Remove the temperature probe connected to the
instrument. The temperature display will show a default
reading of 25.0°C.
4.2.2
Set the instrument to display the temperature of the
buffer 7.00 by pressing the TEMP SET key once. The
temperature digit will flash momentarily. Press the key
again, the next digit will flash. Select the digit you wish
to change while it flashes and press the DIGIT ADV key
to advance the digit. Digit will advance at each press
of the key. Digit will not advance by double pressing.
4.2.3
After setting the temperature, rinse the pH electrode in
distilled water. Dip the pH electrode into the pH 7.00
rinsing solution and then into the pH 7.00 calibration
solution and press the CAL key. The OFFSET indicator will
flash momentarily. Once the instrument detected the
correct offset buffer, the OFFSET indicator will stop
flashing and offset value will be displayed.
4.2.4
Now the instrument is performing a multiple data
sampling. It will take a little longer time for an accurate
calibration point.
4.2.5 When OFFSET point is established, the instrument will
beep and the SLOPE indicator will flash.
4.2.6
Repeat step 4.2.2 to set the temperature of the slope
buffer if required.
4.2.7
Rinse the pH electrode in distilled water and then pH
4.01 or 10.01 rinsing solution. Dip the pH electrode in pH
4.01 or 10.01 calibration solution.
4.2.8
The SLOPE indicator will stop flashing when the
instrument detects the correct slope buffer and will
display the buffer reading.
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