Gardco :: Positest

Positive visual and audible indicators to designate when thickness reading is established.
“V” grooves in probe housing and instrument base to allow correct positioning on cylindrical objects
Precisely balanced independent of gravity–can be used in any position.
GO / NO - GO button can be preset for rapid measurement.
Furnished with wrist strap, neck strap & instructions in leather case with belt loops.
Positive positioning, no pivoting tendencies during measuring.
Functions on a cobalt rare earth permanent magnet (never needs a battery).
Housing not affected by mechanical shock, water, acid or solvents.
Explosion-proof, Refinery safe.
One Year Warranty
Certificate of Calibration showing traceability to PTB (Physikalisch-Technische Bundesanstalt) included with every gauge
Matching Calibration Standards and Procedures available for every model
Highly wear resistant Carbide Probe for longest life and continuous accuracy
Remove center of dial cover for easy calibration adjustment
Conforms to national and international standards

Technical Data
	DF-FM	DF-GM
Scale Ranges:	0 - 80 mils	0 - 8 mils
Tolerance:	±0.2 mils up to 4 mils (±5% of the reading over 4 mils)	±0.04 mils up to 0.8 mils (±5% of the reading over 0.8 mils)
Applications:	Hot dip galvanizing, hard chrome metalizing, paint, enamel, plastic coatings on steel	Electroplating, thin paint films, phosphating on steel

1. Purpose
	A.	For the non-destructive measurement of non-magnetic coating on steel.
2. Procedure
	A.	Place gauge on surface to be measured. With your index finger rotate the scale wheel forward (counterclockwise) until probe makes contact with the surface, then slowly and steadily turn scale wheel backwards (clockwise) until a click is heard and the yellow indicator appears. At this point read coating thickness on the scale. Note: Surface to be measured must be free from dirt, oil or grease.
	B.	When measuring on rod or cylindrical materials, align the “V” groove in the probe housing and instrument base with the rod or cylinder.
3. Calibration
	A.	All PosiTest gauges are factory calibrated to NIST Standards.
	B.	When measuring on rough surface or odd shaped substrates, the PosiTest may require recalibration by means of the following procedure:
		1.	Remove cover in center of glass. Holding the scale wheel securely, insert ball point of pen or similar object into one of the four holes exposed in the center of the dial. Rotate right or left to effect proper calibration. Replace cover securely in center of glass.
		2.
		3.
	C.	Never recalibrate PosiTest on shim stock. Only on thickness standards having an applied coating.
4. Care
	A.	Never expose the PosiTest to any magnetic fields.
	B.	Periodically check the probe tip for foreign matter, removing same with a clean, dry brush or soft cloth.
	C.	When not in use always return the gauge to its carrying case.

Positest Zinc Coatings Conversion Table

Conversion Chart 2

Positest® Coating Thickness Gauge