Xylem MULTI 3400 MULTI-PARAMETER METERS - Manual (Page 22)

Operation Multi 3400i
22
Preparatory activities
AutoCal TEC For this procedure, use any two WTW 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 WTW technical buffer
solution TEP 10 Trace or TPL 10 Trace. Other buffer solutions can lead
to an erroneous calibration. The correct buffer solutions are given in the
WTW catalog or in the Internet.
Note
The buffer solutions are automatically recognized by the measuring in-
strument. Depending on the instrument setting (see section
4.8 C
ONFIGURATION ), the instrument displays the relevant buffer nomi-
nal value or the current electrode voltage in mV.
Note
Skip the steps 2 and 7 if you use a pH electrode with temperature sen-
sor or the temperature sensor of a conductivity measuring cell or a D.
O. probe.
Starting the calibration
1 Connect the pH electrode to the measuring instrument.
If necessary, press the <M> 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 sensor (the TP display indicator is missing from
the display).
1 Press the <CAL> key. The Ct1 display and the function display
AutoCal TEC appears. The sensor symbol displays the evalu-
ation of the last calibration (or no sensor symbol in the delivery
state or after the measurement parameter has been reset).