The Trek Model 706B portable electrostatic voltmeter is designed to perform highly accurate noncontacting surface electrostatic voltage measurements. Applications include measurement of photoreceptor surfaces in copiers and laser printers.

A voltage-nulling technique is employed in the Model 706B that achieves DC stability and high accuracy even if the probe-to-measured surface spacing varies during use, this permits measurement of rotating electrophotography drums without concern for the effects of measurement accuracy due to drum eccentricities.

Power Requirements: Two (2) 9-volt alkaline batteries. 

Operating Time: 10 hours after battery replacement. 

Operating Conditions Temperature: 5 °C to 35 °C. 

Relative Humidity: To 85%, noncondensing. 

Dimensions: 39 mm H x 130 mm W x 134 mm D, (1.6² H x 5.2² W x 5.3²L). 

Weight: 455 g (1 lb), with batteries. 

Ground Receptacle: The green banana jack must be connected to ground to maintain measurement accuracy. 

Power On/Off: A two-position toggle switch. 

Range Switch

    A two-position switch is used to select the measurement range of either 0 to +1 kV or 0 to -1 kV. 

TEST/READ Switch 

    In the TEST position, if the digital display indicates a value lower than 1100, the batteries should be replaced. In the READ     position, the measurements are displayed. 

Voltage Display 

    3½ digit liquid crystal display. 

        Range

            0 to ±1000 V. 

        Resolution

            1 V. 

        Zero Offset

            Less than ±1 count. 

        Sampling Rate

            3 readings per second.