wtw Cond 7110 - Measuring the Temperature

Conductivity Cond 7110
18 ba75927e03 04/2012
The stability control function (AutoRead) continually checks the stability of the
measured values in the monitored time interval. The stability has a consider-
able impact on the reproducibility of measured values. The [AR] display indi-
cator flashes until a stable value is measured.
Stability criteria (AutoRead )
5.1.2 Measuring the temperature
The temperature measurement is absolutely essential for a reproducible
conductivity measurement.
You have the following options to measure the temperature:
• Automatic measurement of the temperature with the temperature sensor
(NTC30 or Pt1000) integrated in the sensor.
• Manual determination and input of the temperature.
The measuring instrument recognizes whether a suitable sensor is connected
and automatically switches on the temperature measurement.
Which type of temperature measurement is active is indicated by the tempera-
ture display and the [TP] status indicator:
If you wish to measure (or calibrate) without temperature sensor, proceed as
follows:
1. Measure the current temperature of the test sample.
2. Set the temperature value with <><>.
Measured
parameter
Time inter-
val
Stability in the time interval
Conductivity
ϰ
10 seconds
Δ
ϰ: better than 0.5% of measured value
Temperature 10 seconds Δ T (° C): Better than 0.02
Tempera-
ture sensor
Resolution of
the temp. dis-
play
Status indica-
tor
Temp. measure-
ment
yes 0.1 °C [TP] Automatic with tem-
perature sensor
- 1 °C - Manual