SPY 670 Operating Instructions Manual - page 3
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p i c lt d .co m
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u n it cali bration
principles of wet Sponge
h o l i day d e t e ct i o n
As the operator of this unit you require accurate, safe, and reliable equipment to
perform coating inspections at the proper output voltage.
Prior to leaving our manufacturing facility Pipeline Inspection Co. certifies
that SPY
®
Model 670 Wet Sponge Holiday Detectors has been calibrated and
demonstrates the output voltage of 67.5 volts (+/- 5%). Since output voltage is
regulated, this tolerance is maintained regardless of load.
Your unit comes with a
Factory Calibration Certificate and a Factory
Authorized Calibration Decal applied to the bottom of the unit both with the
date your unit was calibrated.
Our units do not tend to drift but it is recommended that this unit be calibrated at
least once per year or more frequently based on heavy usage.
Recalibration of
our equipment should be performed ONLY at a SPY
®
Authorized Service
Center due to the unique calibration process; test equipment utilized and
properly trained SPY
®
technicians.
We DO NOT recommend using any other calibration service other than a SPY
®
Authorized Service Center; using an outside service with technicians not trained
to work on SPY
®
brand equipment could damage the unit and if the enclosure is
opened will void the warranty.
When calibration is needed please return your unit to a SPY
®
Authorized Service
Center or SPY
®
manufacturing facility located at:
Pipeline Inspection Company
Attn: Calibration
1919 Antoine Dr.
Houston, TX 77055
Please include: Company Name and Contact Information. For a complete list of
Authorized Service Centers please visit our website at picltd.com. If a copy of the
Calibration Certificate on file is needed it may be obtained by emailing a request to
sales@picltd.com.
Wet Sponge Holiday Detectors are used for the detection of discontinuities
(holidays) in thin film coatings (1-20 mils) of paint, epoxy or any non-conductive
material applied to a conductive material. This type of detector uses 67.5 volts
DC for a test voltage, which is applied to the test surface via a wet sponge. The
fluid media (usually water) in the wet sponge fills the voids in the surface to be
tested and allows low current (micro-amps) to flow into any holidays in the test
area. The current moves through the holiday and into the conductive substrate
which activates a horn to indicate the presence of the holiday.