Memosens COL37E
Maintenance
Hauser
11
5. Is the measured value display on the transmitter stable:
Perform the calibration in accordance with the Operating Instructions for the
transmitter. Pay particular attention to the software settings for the stability criteria for
calibration and for the ambient pressure.
The constants K
sv
and Tau0 of the Stern-Volmer equation are determined at both
calibration points (point in oxygen and zero point). The calibration quality index provides
an indication of the quality of the calibration in relation to the first reference calibration
of the spot cap. Therefore it is important to run the
Change sensor cap
command in the
calibration menu of the transmitter before every initial calibration of a spot cap.
6
Maintenance
Take all the necessary precautions in time to ensure operational safety.
6.1
Maintenance tasks
6.1.1
Cleaning of sensor
Dirt on the sensor can impact the measurement and even cause a malfunction. Examples
include buildup on the spot cap, which can cause a longer response time.
The sensor must be cleaned at regular intervals for reliable measurement results. The
frequency and intensity of the cleaning process depend on the medium.
Clean the sensor:
• Before every calibration
• At regular intervals during operation as necessary
• Before returning it for repair
Type of contamination
Cleaning
Salt deposits
1.
Immerse the sensor in drinking water.
2.
Then rinse it with copious amounts of water.
Dirt particles on the sensor shaft and shaft sleeve
(
not spot cap!
)
‣
Clean sensor shaft and sleeve with water and a suitable sponge.
Dirt particles on the spot cap
‣
Clean the spot cap with water. No mechanical cleaning.
‣
After cleaning:
Rinse with copious amounts of clean water.
