Hach-Lange POLYMETRON 83xx User Manual - Manual (Page 29)

2 E LECTRODES C ONDUCTIVITY P ROBE - I NSTRUCTION M ANUAL
621=183=000 Issue B 09/2010 Page 25
4. Maintenance and cleaning
Conductivity probes are extremely reliable and
not very demanding in matters of calibration.
However, if you observe an erroneous
measurement, we advise you to proceed with
the following checks:
A Check the wiring (see Chapter
3 -
page 13)
B Check the programming of the transmitter
(see Chapter 3 - page 14)
C Check the installation of the probe (see
Chapter 3 - page 17)
D Check the probes (Pt100 and electrodes):
Figure 4-1 - Connecter view
Pt100: Compare the resistance
measured directly on the conductor with
the values below:
Temperature°C 0 10 20 30 40 50
Resistance (
Ω) 100.00 103.90 107.70 111.67 115.54 119.40
Temperature°C 60 70 80 90 100
Resistance (
Ω) 123.24 127.07 130.89 134.70 138.50