VICI 235 Dynacalibrator - Manual (Page 28)

24
Maintenance
Since Dynacalibrators are designed for and generally used in applications that
require continuous service, a planned routine maintenance program is highly
recommended. Routine maintenance consists of inspection, cleaning, calibration,
and leak checks. The table below lists the recommended checks and maintenance
frequencies for continuous and non-continuous use. The recommendations are
provided to help you keep your unit in peak operating condition and avoid
catastrophic failures at inopportune times.
Use the shut-down procedures on page 21 to remove the unit from service and
the initial power-up procedur e on page 10 to retu rn it to service.
Maintenance action
Recommended schedule
Continuous use Periodic use
Instrument inspection and cleaning Quarterly 1000 hours
Leak check Quarterly 1000 hours
Carrier flow rate verification Quarterly 1000 hours
Filter inspection and cleaning Quarterly 1000 hours
Flow controller certification Annually 4000 hours
Chamber temperature calibration Annually 4000 hours
Instrument Inspection and Cleaning
The following procedure should be performed quarterly for units in continuous
service, or at least after every 1000 hours of service. For the steps which call for
disassembly, see the appropriate paragraph in this section.
1. Remove the unit from service according to the shut down procedures on page
21. Di sconnect all power and plumbing.
2. Remove the top cover by unscrewing the six allen screws on each side of the
instrument, above the side bars.
3. Snap the black fan screen off the rear and soak it in warm water with a mild
detergent. Do not use a solvent.
4. Remove the four screws, hex nuts, and lockwashers that attach the fan to the
rear panel. Remove the fan filter and soak it with the fan screen in warm water
and a detergent.
5. Blow out the interior of the unit thoroughly with dry, low-velocity air.
Remove any dirt that remains with a soft paint brush.
6. Clean the fan blades with a soft paint brush or a soft cloth dampened in the
water and detergent solution.
7. Clean the exterior surfaces of the unit with a soft cloth dampened in the water
and detergent solution. Do not use an abrasive.
8. Inspect all assembly mountings for loose hardware, and tighten as necessary.