Switching On The Measuring Instrument; Measuring - wtw Cond 3150i Operating Manual

Cond 3150i
AutoRead
(drift control)
AutoRange
measuring range
selection
Temperature
measurement
Reference
temperature, Tref

Switching on the measuring instrument

Press the < > key.
Display test appears briefly on the display.
Subsequently, the selected cell constants and the temperature compen-
sation that was set up appear for approx. one second one after the other.
The measuring instrument then switches to the measuring mode that
was last selected.

Measuring

Overview of the measuring modes:
Conductivity
µS/cm
Specific
resistance
Ω
M cm
depending on
the instrument setting
Special functions:
The AutoRead function checks the stability of the measurement signal. Acti-
vate AutoRead with <AR>. The current measured value is frozen. Thus, the
<AR> key can also be used as a "hold function" to freeze measured values.
Press <RUN/ENTER> to start the AutoRead measurement. During the Auto-
Read measurement, AR flashes on the display until a stable measured value
is reached. This can be terminated at any time taking over the current mea-
sured value with <RUN/ENTER>.
There are several measuring ranges available for conductivity measure-
ments. If a measuring range is exceeded, AutoRange causes the measuring
instrument to change automatically to the next measuring range. The AutoR-
ange function is permanently switched on (display shows ARng).
The measuring instrument automatically measures the temperature of the
sample with the integrated temperature probe of the conductivity measuring
cell (display shows TP). The measuring instrument automatically recognizes
the type of the temperature probe used. This enables the measuring cells to
be connected with NTC30 or Pt1000.
The reference temperature can be switched between 20 °C and 25 °C. It ap-
pears on the display as Tref20 or Tref25. To switchover the reference tem-
perature, see C
ONFIGURING
Switching on the measuring instrument
<M>
Salinity
SAL
.
5