Xylem COND3110 HANDHELD CONDUCTIVITY METERS - Manual (Page 16)

Operation Cond 3110
16 ba75792e02 11/2008
4.2 Measuring
Preparatory activities Perform the following preparatory activities when you want to measure:
Stability control
AutoRead
During the measuring procedure, the stability control function is
automatically activated. The stability control function (AR) checks the
stability of the measured conductivity signal and the stability of the
measured temperature signal. The stability has a considerable effect
on the reproducibility of the measured value.
For identical measurement conditions, the following applies:
Temperature sensor The temperature measurement is absolutely essential for a
reproducible conductivity measurement. If a temperature sensor is
integrated in the sensor, it is indicated on the display by TP.
Note
The conductivity meter automatically recognizes the type of the
temperature sensor used. Therefore, you can connect measuring cells
with an NTC30 or Pt1000.
1 Connect a measuring cell to the meter.
2 Adjust the temperature of the test solutions and measure the
current temperature if the measurement is made without a
temperature sensor.
3 Calibrate or check the meter with the measuring cell.
4 Select the measured parameter with .
Measured
parameter Reproducibility Response time
Conductivity better than 0.5% of measured
value > 10 seconds
Temperature < 0.3 °C of temperature value > 15 seconds