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VALLEY FORGE & BOLT MANUFACTURING COMPANY
4410 W. Jefferson St. • Phoenix, AZ 85043 • USA
4.2.0 Cleaning the Datum Disc on the SPC4™ Fastener
[1]
Wipe the datum disc face clean (using the BBB as necessary) followed by a forced moisture-free
air cleaning.
1. The forced air stream can be compressed air delivered through an air nozzle, or a can of
compressed air commonly used in cleaning electronic components and computer equipment.
[2]
Clean oil or grease from the datum disc surface
1. Soak the clean lint-free cloth with a solvent such as alcohol or acetone as required for
thorough cleaning. The use of an aerosol can that contains automotive brake fluid has been
proven successful in cleaning these contaminants. However, it must be a fast-drying formula
and one that leaves no residue.
[3]
Check Calibration
1. Using a calibrated meter, install meter on unloaded fastener to check 0 reading.
2. If meter is not reading 0 follow these steps, then refer to 5.0.0 Troubleshooting.
a) Ensure mating parts are clean – datum disc and probe
b) Re-check the calibration as outlined in 2.4.0 System Calibration.
c) Ensure battery is not low; section 2.5.0 Low Battery Indication.
IMPORTANT:
To maintain the integrity of SPC4™ load indicating fasteners and minimize errors in
measuring joint clamp load, it is imperative that the protective caps always remain installed to the
datum discs of each fastener when the 406A unit is not installed.
4.3.0 Cleaning the Enclosure
[1]
Ensure 406A unit is in the "OFF" state.
[2]
Exterior cleaning
warm water and detergent.
CAUTION:
1.
TURN OFF
ONLY CLEAN ENCLOSURE EXTERIOR.
2.
attempting to clean it.
DO NOT
3.
attempt to clean the outside of the enclosure with abrasives or by scraping it with
emery cloth or sandpaper.
4.
DO NOT ATTEMPT
SPC4™ SYSTEM • MODEL 406A • USER'S MANUAL
ONLY!
Wipe the outside of the enclosure surface clean with a mild solution of
the 406A unit prior to cleaning the enclosure.
to clean the interior of the enclosure
- Page 19 of 21 -
PHONE: (602) 269 - 5748
The enclosure should remain closed when
WEB: www.vfbolts.com
Rev. 1.0
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