ircon Modline 4, Installation And Operation Manual

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Section 4 — MAINTENANCE & SERVICE
4–1
4.1 ROUTINE MAINTENANCE
Routine Maintenance is essential for reliable, trouble-free operation. It consists of a thorough inspection and
“tune-up” at regular intervals to keep the instrument working efficiently and head off problems before they occur.
Most service problems are caused by control misadjustment, improper instrument positioning, dirty optics, and
other conditions that will be caught and corrected by an orderly maintenance program.
The checklist below will help you develop a maintenance routine suitable for your installation.
Risk of Personal Injury
When this instrument is being used in a critical process that could cause
property damage and personal injury,
the user should provide a
redundant device or system that will initiate a safe process
shutdown in the event that this instrument should fail.
The user
should follow NEMA safety guidelines in the appendix of this manual.
!
!
CAUTION CAUTION
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Check control settings on the MODLINE 4, and on
any other instruments in the system. Make sure
controls are set correctly for the process being
measured.
IMPORTANT! Do not vary control settings
indiscriminately to compensate for conditions
such as dirty optics.
■ ■
Check for proper alignment. Make sure there are
no obstructions in the optical path between
the MODLINE 4 and the target.
■ ■
Check lens and clean if necessary. Refer to lens
cleaning instructions in Section 4.2.
■ ■
Make sure the MODLINE 4 is not overheated.
(Refer to Section 1.6 for operating temperature
limits for your MODLINE 4 model.) If water cooling
and/or air purge accessories are used, make sure
there is adequate flow of cooling water and/or
clean, dry air.
■ ■
Make sure all connections are secure.
■ ■
Check signal cables for any signs of mechanical
damage or overheating.
4.2 LENS CLEANING
The MODLINE 4 uses an anti-reflection coated lens
made from either silicon or germanium, depending on
the model. The lens is accessible for cleaning from
the front end of the casting and does not require
removal.
To clean the lens, use clean, laboratory-grade
isopropyl alcohol and a clean, soft, lint-free cloth or
cotton swab. Dampen the cloth with alcohol and very
gently swab the surface of the lens. Be sure to clean
the entire exposed surface of the lens.
Dry the lens with a clean, dry, soft cloth. Repeat the
procedure if necessary.
After repeated cleanings, some minor scratches may
appear on the lens. These minor scratches are purely
cosmetic and will not affect the instrument. However,
improper cleaning or other abuse may damage the
anti-reflection coating to the point where the lens
must be replaced. The unit should then be returned to
the nearest service center for repair or calibration.
The frequency of lens cleaning will depend on the
environment at the point of installation. Air purging
will reduce the necessity of frequent cleaning in
dusty, dirty areas.