Maintenance; Instrument Inspection And Cleaning - Valco Instruments Co. Inc. 340-0X Instruction Manual

Maintenance

Since the 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 recom-
mendations 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 26 to remove the unit from service and
the initial startup procedures on page 15 to return it to service.
Maintenance action

Instrument inspection and cleaning

Leak check
Carrier flow rate verification
Filter inspection and cleaning
Dilution flowmeter calibration
Chamber temperature calibration
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 36. Disconnect all power and plumbing.
2. Remove the top cover of the unit 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 wiring for any loose connections or broken insulation.
Recommended schedule
Continuous use Periodic use
Quarterly 1000 hours
Quarterly 1000 hours
Quarterly 1000 hours
Quarterly 1000 hours
Annually 4000 hours
Annually 4000 hours
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