Hand-Held Electrostatic Voltmeter
Manufacturer's part number :
TREK, INC. is introducing the Model 821HH ® Infinitron Hand-Held Electrostatic Voltmeter which represents the next generation of contacting precision surface voltage measuring instruments by providing input characteristics far beyond the limits of any currently available hand-held voltmeter product.
Featuring an input capacitance of less than 0.01 picofarad and an input resistance of greater than 100 teraohm, the Model 821HH can easily measure the voltage level of both conductive and insulative objects and surfaces with virtually zero charge transfer to the measurement probe.
This results in stable high accuracy voltage measurement capability for ESD sensitive components such as semiconductors, LCDs, MR head sensors, etc., without the fear of generating an ESD event upon contact.
The 'no ESD event' capability is due to the probe tips assuming the voltage level of the measured object surface as the tip approaches. Thus at the point of actual contact the tip is already at the voltage level of the measured object/surface, which results in no current flow at the time of contact.
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Technical Data :
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- Measurement Range: 0 to ±2 kV DC or peak AC
- Voltage Display Accuracy: Better than 1% of full scale, ±1 digit
- Input Characteristics: Resistance > 1 x 1014 Ω Capacitance < 1 x 10-14 F
- Voltage Monitor Output: Scale Factor at 1/1000
- Battery or Line Operation
- Easy-to-Read LCD Display
- Records Voltage, Temperature and Humidity
- Data Graphing Capabilities