Concentric Ring Probe for Surface Resistance Testing to IEC 61340-2-3 - Desco 222002

Qualifying ESD mats, flooring or shielding bags calls for an electrode with standardised geometry so that readings stay comparable. The Desco 222002 combines a 63 mm outer ring with a 30 mm inner electrode and, used with a resistance meter, measures surface resistance to IEC 61340-2-3, the test method listed in Table 3 of EN 61340-5-1.

Key benefits

• Comparable results from standard ring geometry with 63 mm outer and 30 mm inner diameter
• Low probe error: carbon-loaded pads below 100 ohms at low test voltage
• Clean separation of the electrodes with more than 1 x 10¹² ohms insulation resistance at 500 V
• Consistent contact pressure from the probe's own weight of about 2.6 kg
• Also measures volume resistance of planar materials when placed on a flat conductive metal plate (not included)
• Conversion to resistivity: multiply the reading by 10, a factor derived from the electrode geometry

Applications

Incoming inspection and qualification of worksurface mats, flooring, shelving and ESD packaging including static shielding bags. Place the material on an insulative surface, set the probe on top and read the value on the meter.

Standards

Test method to IEC 61340-2-3 as referenced by EN 61340-5-1. Desco also lists ESD S11.11 as the applicable test standard.