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A-400 Universal Resistance Checker
Surface resistivity, surface to ground and point to point resistance
indicator |
- Measures surface resistivity, surface resistance to ground
and point to point resistance.
- Easy to use -supplied with 2 cables for point to point
resistance check.
- Extended range of direct readings in ohms per square for
surface resistivity measurements and in ohms for surface resistance
to ground and point to point resistance.
- Portable and light - uses 9-volt battery.
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Three functions of A-400 Universal Resistance Checker
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A/ Surface resistivity check |
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Pair of stainless steel electrodes to measure surface
resistivity |
| For surface resistivity readings place the meter on the
surface being tested and press the center button labeled TEST. If the
LED labeled 106 illuminates, the surface under test has
surface resistivity of 106 ohms per square or less. If the
LED labeled "insulative" illuminates, the surface under test
has surface resistivity greater that 1012 ohms per square.
(Be sure the ground wire is not connected through the ground jack when
surface resistivity is measured.) |
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B/ Surface to ground resistance check |
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Ground jack used when measuring surface to ground resistance |
| Place the meter on the surface being tested. Connect the
meter to a known ground through the ground jack. Note: When the ground
wire is connected through the ground jack, the meter will not measure
surface resistivity. Press the center button labeled Test and the LED
will illuminate to indicate the resistance to ground. If the LED
labeled insulative illuminates, the resistance to ground of the
surface under test is greater that 1012 ohms. |
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C/ Point to point resistance check. |
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Jacks to connect the wires for point to point resistance
check (Wires are supplied with the unit) |
| Place the meter on the flat surface. Connect the two test
wires supplied with the meter to the jacks on the top of the meter
(jacks shown on the picture on the left side). Connect the other side
of the wires (crocodile clips) to the two points between which the
resistance is to be checked. Press the center button labeled Test and
the LED will illuminate to indicate the resistance between these two
points. If the LED labeled " insulative" illuminates, the
resistance between the two points is greater that 1012
ohms. |
| Range |
Automatic form
103 Ω/Sq to 1012 Ω/Sq for surface
resistivity
103 Ω to1012 Ω for surface to ground
resistance
103 Ω to1012 Ω for point to point
resistance |
| Display |
LED's - one per decade.
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| Accuracy |
±10% |
| Changeover Point |
½ decade on a logarithmic scale (3.16 x
10n) |
| Changeover Point Accuracy |
±½ decade |
| Power |
9 volt battery.
Battery life over 40 hours of continuous use |
| Dimensions |
2.40" x 1.02" x 3.78"
(61mm X 26mm X 96mm) |
| Wight |
6 ounces (170g) |
| NOTE |
Bottom/Red Light on the tester
indicates BATTERY LOW.
Test is not valid when this light is on. |
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