Vaisala MMT162 - Manual (Page 49)

Chapter 5 ______________________________________________________________ Maintenance
VAISALA _______________________________________________________________________ 47
CHAPTER 5
MAINTENANCE
This chapter provides information that is needed in basic maintenance of
the product.
Cleaning
Clean the transmitter enclosure with a soft. lint-free cloth moistened with
mild detergent.
Clean the sensor before storing the MMT162 probe and before
calibration. For cleaning the the probe you need instrument air and
heptane (C
7
H
16
) liquid. If heptane is not available, you can also use diesel
oil or petrol. Dry with instrument air to prevent oxidation of the oil on the
sensor. The oxidation of the oil on the sensor can cause extended
response times or drifting.
1. Blow the probe head (with filter) with instrument air to remove the
remains of oil.
2. Immerse the probe head into heptane liquid and rinse out the oil
(for one minute maximum).
3. Dry the probe head with instrument air. In case you are going to
calibrate the probe, remove the filter and dry the sensor with
instrument air. Check that the sensor looks clean.
NOTE Do not immerse the sensor in any polar solvents, for example ketones
or alcohols.