High Voltage Holiday Detector Pannel - CORRECT ANSWER--When determining the
Voltage used, if not shown on dial use Voltage immediately below what's needed
-Remember the selection must be either High or Low and the corresponding number
next to the Voltage.
SSPC-PA2 - CORRECT ANSWER-Dry Film Thickness Gauge
SSPC-PA2 Type 1 - CORRECT ANSWER-Magnetic Pull-Off DFT Gauge
-Dial-Type Magnetic Pull-Off DFT Gauge (Banana Gauge)
-Pencil Type Magnetic Pull-Off DFT Gauge
Dial TypeMagnetic Pull-Off DFT Gauge - CORRECT ANSWER--Known as "Banana
Gauge"
-Intrinsically Safe
-Some Models Can Be Used Underwater
ASTM D 7091 - CORRECT ANSWER--Calibration: Gauge Shall be Calibrated by
manufacturer or third party lab.
-BMR: In order to compensate for any effects from the blast profile must calculate the
Base Metal Reading.
-Verify Accuracy: Use certified metal plates and Gauge must be within 5% of expected
range.
NACE SP0188 - CORRECT ANSWER-High and Low Voltage Holiday Testing
Low-Voltage Holiday Detector - CORRECT ANSWER--Ground is attached directly to
substrate.
-Sponge saturated with a solution of tap water/wetting agent
-Proper mix ratio 1oz/USgal
-Proper of speed is 1ft/sec Double Stroke
-Used on Coatings up to 20mils
-may be used on concrete
Low Voltage Holiday Detectors Common Errors - CORRECT ANSWER--Failure to Keep
probe in contact with surface
-Moving the electrode too fast or slow
-Over or under saturating the sponge
-Low battery or bad lead/ground connection
Telegraphing - CORRECT ANSWER-Can occur when surface is saturated with water
and the Detector reads a different area.