NAR300 system for high temperature
Troubleshooting
Hauser
43
7.3.3
Cleaning the conductive sensor unit
Normally, NAR300 checks the conductivity state between the tip of the electrode and the
main unit of the float. With conductivity, it determines that there is "water" and without
conductivity, it determines that there is "oil or air." Since the electrode holder is connected
to the main unit of the float, if the holder becomes conductive, it determines that "water" is
present, thereby preventing the alarm from being activated and causing erroneous
operation. Clean the space between the tip of the electrode and the holder periodically to
maintain non-conductivity.
Items to prepare
• Rag
• Mild detergent
Cleaning procedure
1. Remove the NAR300 sensor from the pit.
2. Clean from the tip of the conductive sensor's electrode (metal portion) to the
electrode holder (metal portion), and remove any moss, algae or dust.
3. Clean the entire electrode using a mild detergent that has been diluted to a suitable
concentration.
This completes the cleaning procedure.
1
2
A0039904
26
Sensor cleaning
1
Electrode holder
2
Electrode tip
7.4
Firmware history
Date
Software
version
Changes
Documentation
Specifications
Operating instructions
Technical information
11.2003
V1.40
Initial software
Standard
BA027N/08/ja/02.04
TI045N/08/ja/01.05
04.2015
V1.50
SIL2 obtained
High-
temperature
BA00403G08JA06.16
TI00457G08JA04.16
