wtw pH 1970i, Руководство по эксплуатации

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pH 1970i Operation
21 ba75690e01 01/2007
You can select between 3 calibration procedures:
AutoCal TEC is specially adapted to the WTW technical buffer solutions as a fully au-
tomatic
two-point or three-point calibration . The buffer solutions are
automatically recognized by the measuring instrument. Depending on
the instrument setting (see section 4.6 C
ONFIGURATION
), the instrument
displays the relevant buffer nominal value or the current electrode volt-
age in mV. The calibration can be terminated after the first buffer solu-
tion. This corresponds to a
single-point calibration .
AutoCal DIN is specially adapted to the permanently programmed buffer solutions in
accordance with DIN 19266 as a fully automatic
two-point or three-
point calibration . The buffer solutions are automatically recognized by
the measuring instrument. Depending on the instrument setting (see
section 4.6 C
ONFIGURATION
), the instrument displays the relevant buff-
er nominal value or the current electrode voltage in mV. The calibration
can be terminated after the first buffer solution. This corresponds to a
single-point calibration .
ConCal This function is a conventional two-point calibration using two buffer
solutions (pH 7.0 ± 0.5 and any other buffer solution) or a single-point
calibration using any buffer solution that is used as a high-speed
method.
AutoRead When calibrating with AutoCal TEC and AutoCal DIN, the AutoRead
function is automatically activated.
The current AutoRead measurement can be terminated at any time
(accepting the current value) by pressing
<RUN/ENTER> .
Displaying calibration
data
Each time the instrument is switched on, the calibration data are shown
on the display for a short time (see section 4.1 S
WITCHING ON THE MEA
-
SURING INSTRUMENT
). In order to view the calibration data, switch the
measuring instrument off and switch it on again.
Printing the
calibration protocol
The calibration protocol contains the calibration data of the current cal-
ibration. You can transmit the calibration protocol to a printer via the se-
rial interface (see page 41).
Note
You can automatically print a calibration protocol after the calibration.
To do so, connect a printer to the interface according to section 4.5.3
before calibrating. After a valid calibration, the protocol is printed.