Xylem handylab pH LF 12 - Manual (Page 25)

handylab pH/LF 12 Operation
25 ba75370e03 11/2009
Preparatory
activities
4.3.1 AutoCal TEC
For this procedure, use any two technical buffer solutions (pH values at
25 °C: 2.00 / 4.01 / 7.00 / 10.01).
Note
The calibration for pH 10.01 is optimized for the SI Analytics technical buffer
solution pH 10.01. Other buffer solutions can lead to an erroneous calibra-
tion. The correct buffer solutions are given in the SI Analytics catalog or in the
Internet.
Note
The buffer solutions are automatically recognized by the measuring instru-
ment. Depending on the instrument setting (see section 4.8 C
ONFIGURATION ),
the instrument displays the relevant buffer nominal value or the current elec-
trode voltage in mV.
Note
Skip the steps 2 and 7 if you use a pH electrode with a temperature probe or
the temperature probe of a conductivity measuring cell.
1 Connect the pH electrode to the measuring instrument.
If necessary, press the key repeatedly until the status dis-
play pH (pH measurement) or U (measurement of the ORP
voltage) appears.
2 Keep the buffer solutions ready.
3 Adjust the temperature of the solution and measure the current
temperature if the measurement is made without the use of a
temperature probe (the TP display indicator is missing from the
display).
1 Press the key repeatedly until the Ct1 display indicator
and the function display AutoCal TEC appears. The sensor
symbol displays the evaluation of the last calibration (or no
sensor symbol in the delivery state or after the measurement
parameters have been reset).