Xylem wtw Cond 7110, Operating Manual

Page: 17 / 44

Cond 7110 Conductivity
ba75927e05 12/2017
17
5 Conductivity
5.1 Measuring
5.1.1 Measuring the conductivity
1. Connect a conductivity measuring cell to the measuring instrument.
The conductivity measuring screen is displayed.
2. Adjust the temperature of the solutions and measure the current temper-
ature if the measurement is made without a temperature sensor.
3. Immerse the conductivity measuring cell in the test sample.
4. When measuring without temperature sensor: Enter the temperature of
the test sample with
<

><

>.
5. Wait for a stable measured value.
The
[AR] display indicator no longer flashes.
6. If necessary, select the measured parameter with <MODE> .
• Conductivity [µS/cm] / [mS/cm]
• Salinity Sal
• Total dissolved solids TDS [mg/l]
If necessary, set the TDS factor with
<

><

> (see section 6.1.4
S
ETTING THE
TDS
FACTOR
, page 26).
• Resistivity [M Ω ·cm]
Stability control (AutoRead )
During the measuring procedure, the stability control function is automatically
activated.
To ensure the high measurement accuracy of the measuring sys-
tem, measure with a current calibration or the correctly set cell
constant (see section 5.2 C
ALIBRATION
, page 19).
0
5
2
0 3 5
C
°
S/cm m
nLF
TP
Tref25
AR ARng