Kipp & Zonen BREWER MK IV Instruction Manual page 54

16-10-200716-10-2007
5. ROUTINE OPERATIONS AND MINOR MAINTENANCE
Desiccant Changes
Moisture is one of the worst enemies of the Brewer and can cause damage to the Optics which
often can be corrected only by returning the Brewer to the factory for parts replacement and
recalibration.
There are two desiccant systems in the Brewer - the desiccant cartridge 'breather' and the loose,
or bagged desiccant.
The desiccant cartrige is intended to remove moisture from the air drawn into the Brewer as
temperature changes. This container can be inspected from the underside of the Brewer base by
removing two 'thumbscrews. If the desiccant is no longer Blue, then it requires changing.
Loose or bagged desiccant is intended to remove moisture from inside the Brewer enclosure.
If the Brewer is equipped with a Moisture Sensor, then the Moisture Index is displayed on the
Computer Display. The maximum safe level for the Moisture Index is 10.
If the Brewer is not equipped with a Moisture Sensor, then Humidity Sensors placed beneath the
Brewer Viewing Window should be inspected regularly. If the 40% indicator starts to turn Pink, the
moisture is approaching the danger level.
If either of the two potentially dangerous conditions of moisture is viewed, then the desiccant in the
Brewer enclosure should be changed.
The desiccant container mounted in the rear of the Spectrometer should be inspected each time the
Brewer cover is removed, and the desiccant replaced whenever it is observed that the indicator is in
the 40% region.
Tracker Drive Mechanism - See Figure 5.2
If the Steps per Revolution test returns an irratic result, or a variance that is more than about 20
steps, then the large aluminum drive wheel and the small stainless steel drive rod should be
inspected and cleaned with a dry tissue.
If no slippage is observed in the SR, then the cleaning should be done approximately every 3
months.
If Tracker slippage is not due to dirty drive gears, then drive gear tensions should be checked.
The friction drive arm is set with 9 kg of tension on the lower spring and 4 kg on the upper spring to
provide drive friction and gear mesh pressures respectively.
MKIV OPERATOR'S MANUAL 51