3. pH Calibration
3.1 Calibration Procedure
1. Switch the 901-PH on and select pH mode (section 2).
2. Plug the pH sensor into the Sensor socket and the temperature sensor into
the Temp socket.
3. Ensure that temperature has already been calibrated or manually set (see
sections 5.1 and 5.4). NOTE: A " ∗∗ " in place of the decimal point in the
temperature readout indicates that temperature is not calibrated.
4. Ensure that the primary and secondary buffers to be used have been
correctly selected for automatic buffer recognition. See section 8.
5. Remove the wetting cap from the pH sensor.
6. Rinse the pH and Temperature sensors in distilled water and blot them dry.
7. Place both sensors into a small sample of primary buffer (pH6.88 or pH7.00)
so that the bulb and reference junction are both covered, as per the diagram
below.
DO NOT place the sensors directly into the buffer bottle.
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