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Summary of Contents for ETS 222
- Page 1 ELECTROSTATIC FIELDMETER Model 222 Operating Manual 5/09...
- Page 2 1.0 GENERAL Many applications require the measurement of the electrostatic charge or voltage on surfaces that are either stationary or in motion. The Model 222 is a unique, precision electrostatic fieldmeter that measures the magnitude and polarity of the electrostatic fields produced by charged material and objects.
- Page 3 Model 222 is housed in a compact, al aluminum instrument case and comes complete with standard sensor and 5’ (1.5m) cable plus a plug-in universal voltage power module.
- Page 4 Sensor The Model 222 is available with two (2) sensor configurations, both operate using a vibrating reed sensing unit. The standard sensor is for laboratory or clean environments and is best suited for low voltage measurements. A Charged Plate Adapter assembly (optional) enables the standard sensor to measure charge on conductors by direct connection or use with custom detector probes.
- Page 5 housing and is best suited for use in dirty or hazardous environments or when a long cable run is required. 2.3.1 Standard Sensor The standard sensor, shown in Figure 2-3, is housed in an aluminum housing that measures 2”x1”x1” (52x25x25mm). Two 6-32 tapped holes on the side are used to install the optional charged plate assembly or could be used for mounting the sensor.
- Page 6 This sensor also requires a RESET button to be fitted to the front panel of the Model 222. When depressed the isolated detector plate of the sensor is grounded. This is necessary when beginning a new measurement.
- Page 7 Connect the sensor cable to the sensor and the connector on the rear panel of the Model 222. If a chart recorder or other data acquisition device is to be used connect it to the BNC connector also on the rear panel. The instrument may be operated from the batteries or the external power module.
- Page 8 Mount the sensor assembly so that the detector plate is in free space. Connect the 5’ (1.5m) to the RED V connector on the Model 222 front panel and the other end to the RED banana jack on the detector plate as shown in Figure 3-2.
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Page 9: Operation
Custom Test and Measurement Fixtures The measurement of static charge build-up in certain unique applications may require specially designed Charged Plate Adapter test fixtures. If the Model 222 is provided with a Custom Test Fixture, refer to the Appendix for installation and operating instructions. -
Page 10: Taking Measurements
6.0 REPAIR & CALIBRATION The Model 222 Electrostatic Fieldmeter should require very little attention if it used properly and is protected from excessive contamination (dust, dirt, harmful vapors, solvents, etc.) The sensor electronics are surface mount and cannot be serviced by the user. -
Page 11: Specifications
If the unit fails it should be returned to the factory for repair and recalibration. The calibration of the Model 222 can be checked using the built-in regulated 500/1000 Volt reference power supply as follows. Secure a 12”x12” (305x305mm) plate to a good insulator such as Teflon™, acrylic, polypropylene, etc. -
Page 12: Warranty
ETS must be notified before any equipment is returned for repair. ETS will issue an RMA (Return Material Authorization) number for return of equipment.
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