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BUFFER FLUIDS
The buffer fluids are used to calibrate the pH meter. These
fluids have the characteristic that their acidity only changes
slightly with contamination.
However, they do change eventually and therefore it is
advisable to renew the fluids after around 10 calibration
processes. To do this, first rinse the flask with a little of the
buffer fluid concerned and then refill. It is advisable to store
the buffer fluids in a dark place.
MEASURING WITH THE pH METER
The pH value is measured with a correctly calibrated meter
according to the following procedure:
1. Take a sample of the fluid to be measured in a clean
beaker or measuring flask and determine the temperature.
2. Rinse the probe in demineralized water and wipe with a
tissue. Place it in the sample and stir slightly.
3. Adjust the temperature of the sample on the meter.
4. Wait 1 minute until the probe has stabilized.
5. Read off the pH value ,
6. Rinse the probe in demineralized water and replace in
holder
Please make sure that there is always a quantity of
PROBECARE in the holder for your probe and that you store
the meter in an upright position so that the reservoir does not
leak and the bulb remains wet. The pH value indicates the
acidity of a solution. In order to obtain an indication of the pH
value, we give below a few guidelines concerning pH values
in substrates or different types of soil:
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