Xylem handylab pH LF 12 User Manual download pdf (Page 25)

handylab pH/LF 12 Operation

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 <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 probe (the TP display indicator is missing from the

display).

1 Press the <CAL> 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).

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Xylem handylab pH LF 12 User Manual Page 25