Thermo Scientific MIRAN 205B Series, Instruction Manual, Page: 109 / 214

10-1
Chapter 10
Maintenance and Service
The SapphIRe analyzer has no user-serviceable parts and requires no lubrication or
routine cleaning. With the exception of the battery pack, all parts have an infinite storage
life.
Warning:
Intrinsically safe models require special actions with respect to the following
section. Refer to Appendix C for descriptions of these actions.
ZERO GAS FILTER
The zero gas filter contains activated charcoal and should be stored in a sealed plastic bag
when not in use. Saturation of the filter depends on the nature and concentration of
contaminants. If a new cartridge produces an appreciably lower analyzer reading, the old
cartridge should be discarded. Replace the cartridge after no more than 30 zero cycles
and at least once a year. It is important to realize that this replacement frequency may be
inadequate for some gases.
PARTICULATE FILTER
The useful life of the particulate filter depends upon the amount of particulate matter at
the sampling point. If the filter becomes clogged, the sampling flow rate decreases
resulting in a slow response. The particulate filter can also become contaminated with
background gases, leading to faulty results. Replace the filter when the response time has
increased noticeably, if the filter is suspect, or after 400 operating hours.
BATTERY PACK
Warning:
Intrinsically safe models require special actions with respect to the following
section. Refer to Appendix C for descriptions of these actions.
The battery pack supplied with the analyzer consists of six NiCd cells and requires no
maintenance other than recharging. The battery pack can be operated and charged in any
position. Both the Model 5025A and 5100A Charger/Power Supplies are designed to
provide safe levels of charging current under all conditions without adversely affecting
cell life. A fully discharged battery pack can be recharged in approximately four hours.
Note:
Intrinsically safe models use a different battery pack from earlier models. The
older battery packs cannot power the intrinsically safe model.