Integritest Exacta Filter Integrity Test Instrument
Operating and Maintenance Manual Maintenance and Calibration 199
8. Tighten the thumbscrews.
Inlet Tubing Gas Filter Replacement
The inlet tubing gas filter contains a desiccant filter designed to remove moisture, and large
particles, from the inlet gas supply.
Note: The user is responsible for ensuring a clean, dry gas supply. The inlet tubing gas
filter is only a secondary moisture barrier and cannot be depended upon to protect the
instrument.
Gas Filters should be checked regularly and often. Although the actual frequency of filter
change may vary depending upon operating conditions, it is recommended that the filter be
changed monthly.
When the desiccant beads in the filter are exhausted, their color changes from blue to amber.
When all the beads lose their blue color, the filter should be replaced. The instrument can still
be used if the desiccant is exhausted, however the filter will no longer remove moisture from
the gas supply.
Procedure
1. Make sure that the inlet tubing assembly is disconnected from the gas source.
2. Unscrew the gas filter from the tubing connector(s).
3. Screw the new gas filter onto the tubing connector(s). Be sure to apply a sealant (such
as Teflon tape) to the threads, prior to re-assembly, to avoid gas leaks.
Main Fuse Replacement
The main fuse should never require replacement unless there is a major electrical surge from
the electrical source. If the fuse needs replacement, the Millipore approved fuse must be used.
(2 Amp Slow-Blow, 250V, 5-20mm, Millipore Part No. P80037)
Procedure
1. Make sure that the instrument is turned off and the power cord is
disconnected.
2. Locate the fuse on the back panel of the instrument (see Electrical Connections
on page 26).
3. Unscrew the fuse holder.
4. Remove the old fuse.
5. Insert a new fuse.
6. Replace the fuse holder and screw in place.
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