Model IR4000S
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5.0 Maintenance
WARNING:
Disconnect or inhibit external devices such as trip amplifiers, PLC’s, or DCS
systems before performing any maintenance.
NOTE:
The system’s full two-year warranty will be voided if customer personnel or third
parties damage the system during repair attempts or maintenance activities.
5.1 Developing a Maintenance Schedule
Maintenance requirements will vary with each installation; General Monitors recommends
that a schedule for periodic maintenance be established and followed, and that a
maintenance logbook be kept for each unit in operation.
More frequent cleaning and calibration checks are recommended if the equipment is
impacted by unusual environmental conditions such as mud collecting on the detector
windows, detectors accidentally being painted over, etc.
General Monitors is not implying that the customer should expect problems with detector
life or stability, but calibration checks ensure the integrity of the life protecting equipment.
5.2 Zeroing and Recalibration
For detailed instructions on initiating gas checks, zeroing and calibration using the IR4000S
menus, see Sections 4.2 - 4.4.
5.3 Lubricating Threads and Seals
If the neoprene rubber gasket (O-ring) in the cover of the IR4000S enclosure is found dry,
it should also be lubricated with the lubricant/sealant that is included with the
IR400/IR4000S units, or is available on order from General Monitors (P/N 610-010).
As an alternative to grease, PTFE (Teflon) tape may be used.
5.4 Maintaining the X/P Integrity
The Model IR4000S is rated explosion-proof for use in hazardous locations.
Before the cover of the IR4000S is removed, or the cover bolts are loosened and power
is to be left on, it is necessary to declassify the area. When replacing the cover, the gap
between the lid and the housing should be less than .0015 inch (.038 mm). Make sure
that the flame-path is clear of dirt and debris before replacing the cover. Tighten the
cover bolts to a torque setting of 50 inch-pounds. Use a feeler gauge to ensure the gap
between the cover and the housing is less than .0015 inch (.038 mm).
