DeFelsko PosiTest HHD Manual De Instrucciones página 9

8. Release the safety trigger to turn high voltage OFF and return
the PosiTest HHD to Standby Mode.
The PosiTest HHD is now ready to use.
1.With the detector powered ON and in Standby Mode, press
to open the menu and then select the Voltage Set icon
2.The detector will display the test voltage
3.Use the or
-
adjusts in 10V increments between 500V and 1,000V, and in
100V increments between 1kV and 35kV.
4.Select OK with the
The inspection voltage should be obtained from the coating
manufacturer's specification or by contacting the coating
manufacturer. Based on international standards, formulas and
tables can be used as a guide for setting voltages on various
coating thicknesses. A sample calculation from NACE International
Standard Practice SP0274-2011 is as follows:
V = 1,250 √T (mils)
V = 7,900 √T (mm)
NOTE:
The voltage output of the PosiTest HHD is regulated and maintains
the test voltage under normal electrode loading. When in Detection
Mode, the test voltage being generated is displayed on the
PosiTest HHD. Minor fluctuations on the display are normal during
inspection as the PosiTest HHD is regulating the test voltage.
When the electrode is connected to ground, the display will show
"---" indicating that the generated voltage is less than the minimum
of 500V.
Adjusting the Test Voltage
buttons to adjust the voltage. The voltage
+
button to save the voltage and exit.
where V = Voltage in volts
T = Thickness of coating
7
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