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 Model 279 Ultra-Stable Isoprobe Rack Mountable Voltmeter
Designed for use in a production or QC environment, this compact low-cost instrument measures electrostatic voltages up to ±3 kV with excellent
stability and low noise and drift. It is useful in photoreceptor research and in process control loops where accuracy is essential. 1/2 the size of Model 244.
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Feature 1:
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Low profile half rack size for multichannel applications
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Feature 2:
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Full complement of interchangeable probes
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Feature 3:
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Selectable recorder output range
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Specification:
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Size
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1.7 x 8.2 x 15.1 inches (44 x 208 x 384mm),
1.75" rack mounting available (1 or 2 per rack).
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Weight
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4 lb. (1.8kg)
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Power Requirements
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100, 115, 230 VAC, ±10%, 50/60Hz, 15 watts.
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Meter Range
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±3000 volts, auto polarity.
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Step Response:
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For typical input step: <3ms (10% to 90%)
for 1kV step: <2½ms (10% to 90%)
for 2kV step: <3½ms (10% to 90%)
for 3kV step: <4ms (10% to 90%)
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Frequency Response:
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Small signal frequency response typically ±3db to >300Hz.
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Surface Resolution:
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Determined by probe aperture size and surface-probe
separation. Standard type 1034E & 1034S probes with 0.07" (1.75mm) aperture will resolve a 0.10" (2.5mm) spot at 0.02" (0.5mm) separation.
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Drift:
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<0.01V/hr after 1 hr warm-up (0.003V/hr
typical). Not measurably affected by 10°C temperature variation or changes between 10% and 90% relative humidity.
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Noise:
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<0.3V rms or 2 volts peak-to-peak wide band
(bandwidth restricted to<1kHz) referred to input.
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Recorder Output
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Compressed analog output is input divided by 100,
200 or 1000 (factory selectable). Typical maximum dynamic range at isolated BNC connector is ±18 volts for external loads greater than 10kohms.
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Display Type:
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LED meter with "blackout switch" for darkroom applications
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Accuracy
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0.1%, ±0.003%/°C over +20 to +40°C range (at
recorder output). Useable to +50°C.
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Model 279 ISOPROBE Voltmeter Products and Accessories
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Description
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Part Number
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Unit Price
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Model 279 Ultra-Stable Isoprobe Rack Mountable Voltmeter, 110V, Probes sold separately
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M279/110
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$ 2,165.00
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ORDER PAGE
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Model 279 Ultra-Stable Isoprobe Rack Mountable Voltmeter, 100V, Probes sold separately
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M279/100
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$ 2,165.00
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Model 279 Ultra-Stable Isoprobe Rack Mountable Voltmeter, 220V, Probes sold separately
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M279/220
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$ 2,381.00
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Probes for all of the above sold separately and listed below
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Probes
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Part Number
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Unit Price
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Model 1034 probes are used with Isoprobe® electrostatic voltmeter Model 279. The probes are 5/16" by
5/16" by 3" long and equipped with a 10-foot cables.
The end view and side view configurations provide the user with optional mounting positions where space constraints may
be a problem.
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Model 1034E Standard Miniature Probe, End Viewing
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M1034E
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$ 835.00
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ORDER PAGE
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Model 1034S Standard Miniature Probe, Side Viewing
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M1034S
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$ 835.00
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Model 1034EH High Resolution Probe, End Viewing
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M1034EH
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$ 1,125.00
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Model 1034EL Low Resolution Probe, End Viewing
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M1034EL
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$ 1,045.00
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Model 1034SL Low Resolution Probe, Side Viewing
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M1034SL
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$ 1,045.00
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Model 1034T Transparent Miniature Probe
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M1034T
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$ 1,045.00
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