Radiometer Analytical MeterLab PHM220 Mode D'emploi page 22

In order to carry out a pH AUTOREAD measurement, it is necessary to
select AUTOREAD in Edit SAMPLE before you start the measurement
procedure; refer to page 37.
In the AUTOREAD mode, the AUTOREAD function can be "inactivated" by
setting the stability criterion to "0" and the accept time to "9999" when
editing a method. In this way, the result and the stability of the measurement
will only be accepted, printed and transferred to the GLP table when you
press .
1. Perform a one or two-point calibration as previously described. To
check the stored calibration results press the GLP key and select
CAL.
2. Rinse the electrode(s) and temperature sensor thoroughly with deion-
ised water and dab dry with a soft tissue.
3. Press the Mode key and select "pH" using the left or right arrow key.
4. Press the Sample key. The date and time of the last calibration will be
shown:
Note: If a new calibration is required, the following message will appear:
Press the Cal key and perform the calibration as previously described.
If you wish to use the calibration data stored in the GLP table you can
ignore this message by pressing the
5. Press the
sensor is connected, the PHM220 will show the actual pH value and
the temperature measured; go to step 6.
If no temperature sensor is connected the following display will appear:
22
Chapter 2
pH AUTOREAD
Last Calibration
15FEB95
NEW CAL REQUIRED
Press Cal
key to initiate sample measurements. If a temperature
13:48
key.