Xylem Lab 970 - Manual (Page 21)

Lab 970 Operation
21 ba75558e03 11/2009
4.3 Measuring
Preparatory activities Perform the following preparatory activities when you want to measure:
CAUTION
When connecting an earthed PC/printer, measurements cannot be
performed in earthed media as incorrect values would result.
The RS232 and USB interfaces are not galvanically isolated.
Temperature sensor The temperature measurement is absolutely essential for a
reproducible conductivity measurement. If a temperature sensor is
connected, it is indicated on the display by TP.
If you use a conductivity measuring cell without integrated temperature
sensor, we recommend to use an external temperature sensor.
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 .