Reference only — this item is no longer available. This product has been discontinued and cannot be ordered. We keep the page online so the specifications and documentation stay available to anyone still running the equipment. Current replacements are listed further down.

Discontinued

Surpa Surface Resistance Checker (AS385) with Case

Reference only — not for sale

Model	AS385
Manufacturer	Velleman
Category	Specialty Meters
Status	Discontinued

Browse all Specialty Meters Ask us for a replacement

Product details (archived)

The information below is retained for reference only. This item is discontinued and cannot be ordered.

Surpa Surface Resistance Checker

The surface resistance meter uses precision spaced parallel bars positioned on the back for sensing surface resistivity.

measures both surface resistivity and resistance to ground
easy to use, no cable or probes to adjust
extended range of direct readings in ohms per square for surface resistivity measurement and in ohms for resistance to ground
Pocket size prtable meter

Specifications

range: automatic from 103 Ohm/Square to 1012 Ohm/Square
display: LED's - one per decade and insulation
accuracy: within 10%
changeover point: 1/2 decade on a logarithmic scale (3.16 x 10n)
changeover point accuracy: plus or minus 1/2 decade
power: 9 volt battery (not included)
battery life: over 40 hours of continuous use
dimensions: 2.76" x 0.98" x 5.12" (70 x 25 x 130 mm)
weight: 6 ounces (170g)
UPC: 816353014713

Supplied with:

Carrying case with shoulder strap
Ground lead with alligator clip

For Surface Resistivity Readings:
Place the meter on the surface being tested and press the test button. If the 10^6 LED is illuminated, the surface being tested has a surface resistivity of 10^6 ohms per square or less. If the LED labeled insulative, is illuminated, the surface under test has a surface resistivity that is greater than 10^12 ohms per square. (Be sure the ground wire is not connected through the ground jack when taking surface resistivity measurements.)

For Resistance to Ground Readings:
Place the meter on the surface being tested. Connect the meter to a known ground through the ground jack. When the ground wire is connected through the ground jack, the meter will not measure surface resistivity. Press the center button and the illuminated LED will indicate the resistance 10^5 ohms or less. If the LED shows insulative ,the resistance to ground of the surface under test is greater than 10^12 ohms.