DeFelsko PosiTector 6000 FNDS Addendum To Instruction Manual
When attached to either a PosiTector Standard or Advanced body, the PosiTector
6000
FNDS
probe measures the individual thicknesses of both the paint and the zinc layers
in a duplex coating system with a single reading.
Duplex coating systems use a combination of two corrosion protection systems –
typically paint or powder coating over galvanized steel (hot-dip, electro or zinc spray
metallizing). The resultant corrosion protection is superior to either protection system
used independently.
Duplex Mode
In Duplex mode, the Gage utilizes both magnetic (ferrous) and eddy current (nonferrous) principles simultaneously to calculate and display the individual paint and zinc
layer thicknesses. The magnetic principle is used to measure the combined paint/zinc
thickness over the ferrous substrate and the eddy current principle is used to measure
the paint thickness over the non-ferrous zinc coating. The zinc thickness is calculated
by subtracting the paint thickness from the combined paint/zinc thickness
measurement.
PosiTector
®
6000 FNDS probe
for Duplex Coatings
Addendum to Instruction Manual v. 7
How to Measure
The PosiTector
6000
powers up when the center navigation button is pressed.
To preserve battery life, the instrument powers down after approximately 5 minutes
of no activity. All settings are retained.
1. Remove the protective rubber cap from the probe.
2. Power-up the Gage by pressing the center navigation button.
3. Place the probe on the surface to be measured. When a measurement is calculated,
the Gage BEEPS and the measurement is displayed.
NOTE: A “---” dashed line value and a low tone indicates the Gage was unable to
calculate the zinc layer thickness
4. Lift the probe AT LEAST 2 inches (5 cm) between readings or leave the probe on the
surface in the same location for continuous measurements.
Verify accuracy on reference standards at the beginning and the end of each shift, or
if the gage is dropped or suspected of giving erroneous readings.
When enabled (default), the Gage will display two measurement values (as shown
above). To disable, uncheck
Duplex
within the
Setup
Menu. Alternatively, press the
Up navigation button to toggle Duplex On/Off (when Memory is OFF).
When disabled, the Gage will operate like a conventional combination ferrous/nonferrous instrument (similar to the PosiTector
6000 FNS
probe). Ideal for measuring
non-magnetic coatings over steel and non-conductive coatings over non-ferrous metal
substrates.
N = Paint Thickness
Zn = Zinc Thickness
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