LABEC M-MIA-A - Manual (Page 90)

Ultrasonic milk analyser
7. pH Calibration.
Serve for pH meter’s calibration. For this purpose 2 sample buffers are used,
shown on the display as Low buffer (for example 3.00 pH) and High buffer
(for example 7.00 pH). Follow the procedure:
Start the Calibration menu.
Put the probe in the Low buffer.
Using the analyzer’s buttons enter the exact buffer value. The following is
shown on the display:
pH Calibr
Put Izopot buff
Buf=xx.xxx
The operator has to enter the buffer’s value, when the probe is in its
isopotential point.
After that the display shows:
pH Calibr
Put Izopot buff
Buf=xx.xxx
V=x.xxxV Set
Where x.xxxxV is the measured in the probe voltage. Press the button Set
when the readings stop moving. Repeat the procedure with the Next buffer.
The following message appears on the display:
pH Calibr OK
Which shows that the calibration procedure was completed successfully. The
calibrated device is ready for making measurements.
The device automatically passes in mode pH measuring.
8. pH Measuring.
Entering this menu means that you start measurement of pH in off line, i.e.
the analyzer works only as a pH meter. The operator has to put the probe in
the sample. The following message is shown on the display:
Operation manual MRC.VER.01-02.10