Resistance Testers
At Desco Europe we offer a range of low resistance and surface resistance meters suited for different requirements within the ESD Protected Area (EPA). Arguably, the resistance meter or ohmmeter is the most critical piece of test equipment used in ESD Control. Of the 13 ESD Control items listed in tables 2 and 3 of IEC 61340-5-1 12 are resistance limits.
Types of Resistance Testers
The Surface Resistance Meter is an instrument that measures the electrical resistance of a surface. Depending on the result, it can tell you whether a material is insulative, dissipative, or conductive. When combined with two 2.5 (± 0,25) kg cylindrical electrodes it can carry out the product qualification and compliance verification of work surfaces, storage racks, trolleys, flooring, seating, and static control garments. Measuring both Resistance Point-to-Point (Rp-p) and Resistance-to-ground (Rg). Together with a handheld electrode, it can measure a Person/footwear/flooring system, and with a glove CAFE test electrode, it can measure the resistance of worn gloves and finger cots. The concentric ring probe allows a surface resistance meter to measure the volume resistance of planar materials, and the two-point resistance probe allows for testing the resistance for small hard to reach areas. A surface resistance meter must have output voltages of both 10 V and 100 V depending on the range of resistance measured. They should be capable of making measurements one order of magnitude above and below the expected measurement range. Desco Europe’s resistance meters include the Digital Surface Resistance Meter, the Analogue Surface resistance Meter, the SCS 701 Analogue Surface Resistance Meter, and the Surface Resistance Checker.
A Low Resistance Tester needs to be capable of measuring less than 103 ohms. It is designed for the compliance verification of Grounding Systems such as banana jacks and auxiliary ground, as well as soldering iron verification.
How to choose a surface resistance meter
Things to consider when choosing a surface resistance meter:
- Test range
- Automatic or manual selection of test voltage
- Accuracy
- Display- Analogue, digital resistance mantissa, and exponent or resistance range LEDs
- Is temperature and relative humidity required at the point of testing?
- In-built memory
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