Desco Vermason 222564 — High-Speed Wrist Strap and Footwear Test Station
The Desco Vermason 222564 is a high-speed, high-precision test station for wrist straps and footwear, supplied by DESCO. The device measures the resistance of the grounding circuit, including the operator's body during use, and indicates the result with LED and buzzer. The test station uses a test voltage of 24 VDC and performs tests with a cycle time of approximately 1 second.
Functionality and Operation
The tester measures resistance in the range of 750 kilohms to 35 megohms with an accuracy of ±10%. Pass/fail indication is given by a green LED and buzzer for PASS, and a red LED for FAIL. The unit comes standard with the tester, a wall plate, a single foot plate, a 9 V alkaline battery, and a calibration certificate. When the battery level is low, a LOW BATTERY LED indicates, and battery replacement is recommended.
Documentation
Further technical details and installation/operation instructions can be found in the manufacturer's technical bulletin. See datasheet from the manufacturer
Typical Applications
- Testing the effectiveness of personal grounding systems (wrist straps) while worn, by measuring resistance in the circuit including the body.
- Testing ESD footwear using the included foot plate to confirm resistance within the specified range.
- Checking connection continuity for cords during flexing while measuring, as suggested in the manufacturer's guide.
Specifications
- Product Name: Desco Vermason 222564
- Manufacturer: DESCO
- Test Voltage: 24 VDC
- Test Range (Wrist Strap): 750 kilohms - 35 megohms
- Test Range (Footwear): 750 kilohms - 35 megohms
- Accuracy: ±10 %
- Test Cycle: approximately 1 second (indicated in product description)
- Battery Life: approximately 3,000 tests (3 seconds per test) — indicated in the manufacturer's technical bulletin
- Dimensions, Tester: 146 mm x 91 mm x 33 mm
- Dimensions, Wall Plate: 300 mm x 600 mm x 3 mm
- Dimensions, Foot Plate: 420 mm x 220 mm x 3 mm
- Weight: 0.3 kg (incl. battery and wall plate)
- Standard Contents: tester, wall plate, single foot plate, 9 V alkaline battery, calibration certificate
Sources
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