The Trek Model 341B is a DC-stable, precision electrostatic voltmeter for making noncontacting surface voltage measurements. The 341B employs a field-nulling technique that achieves DC stability and high accuracy even if the probe-tosurface spacing changes. This permits measurements of either stationary or moving surfaces without the need to establish fixed spacing to maintain accuracy. The instrument also utilizes a patented probe design that eliminates the need for close tolerance components which significantly improves noise and drift under conditions of high humidity and wide temperature ranges.
Superb noise and drift performance
Precision voltage monitor output
Monitor provides a low voltage replica of the measured electrostatic potential for monitoring purposes or for use as a feedback signal in a closed loop system
Easy-to-read LED display
Optional probes offer versatility (order separately)
Can be operated on a bench top, or with optional hardware, in a standard 19-inch rack
NIST-traceable Certificate of Calibration provided with each unit
CE compliant
Measurement Range： 0 to ±20 kV DC or peak AC
Measurement Accuracy： Better than ±0.1% of full scale, referred to
the voltage monitor Speed of Response (10% to 90%)：Less than 200 μs for 1 kV step. Less than5 ms for 20 kV step change
Full Signal Bandwidth： DC to better than 25 Hz
Stability
Drift with Time Less than 100 ppm/hour, noncumulative
Drift with Temperature Less than 100 ppm/˚C
Temperature 0°C to 40°C (32°F to 104°F)
Relative Humidity To 90%, noncondensing
Altitude To 2000 m (6561.68 ft.)
Probe-to-SurfaceSeparation： 3 mm ±1mm (recommended)
Dimensions： 230 mm H x 441 mm W x 432 mm D (9.06” H x 17.36” W x 17” D)
Weight： 17 kg (37 lb)
