Measuring - wtw pH 340i Instrucciones De Operación

Measuring

pH value
AutoRead
(drift control)
Temperature
measurement
during pH
measurements
AutoRange
measuring range
selection
Salt content
correction in
O measurements
2
6
Measuring
Overview of the measuring modes:
Redox-
voltage
mV
or
Special functions:
The AutoRead function checks the stability of the measurement signal (ex-
cept for the measurement of the ORP voltage). Activate AutoRead with
<AR>. Press <RUN/ENTER> to start the AutoRead measurement. During
the AutoRead measurement, AR flashes on the display until a stable mea-
sured value is reached. This can be terminated at any time taking over the
current measured value with <RUN/ENTER>.
You can perform pH measurements with or without a temperature sensor as
well as with the temperature sensor of an oxygen sensor. The measuring in-
strument recognizes which sensors are connected and switches automatical-
ly to the correct mode for the temperature measurement (display TP).
Manual temperature input: Set the temperature value with < > < > while
pressing the <RUN/ENTER> key.
There are several measuring ranges available for oxygen measurements. If
a measuring range is exceeded, AutoRange causes the measuring instru-
ment to change automatically to the next measuring range.
A salt content correction is required in the oxygen concentration measure-
ment of samples with a salt content of more than 1 g/l. To do so, press the
<CAL> key repeatedly until Sal appears on the display. Then, enter the salt
content with < > < >. Switch on the salt content correction with < > while
pressing the <RUN/ENTER> key (display SAL). To switch it off, press < >
while pressing the <RUN/ENTER> key.
Oxygen
<M>
saturation
%
connect or
disconnect
the D. O. probe
pH/Oxi 340i
Oxygen
concentration
mg/l