Model 279



Product Description

Ultra-Stable Isoprobe Rack Mountable Voltmeter, 3kV

279_newModel 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.

Feature 1: Low profile half rack size for multichannel applications
Feature 2: Full complement of interchangeable probes
Feature 3: Selectable recorder output range

Size 1.7 x 8.2 x 15.1 inches (44 x 208 x 384mm), 1.75″ rack mounting available (1  or 2 per rack).
Weight 4 lb. (1.8kg)
Power Requirements 100, 115, 230 VAC, ±10%, 50/60Hz, 15 watts.
Meter Range ±3000 volts, auto polarity.
Step Response:

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%)

Frequency Response: Small signal frequency response typically ±3db to >300Hz.
Surface Resolution: 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.
Drift: <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.
Noise: <0.3V rms or 2 volts peak-to-peak wide band (bandwidth restricted  to<1kHz) referred to input.
Recorder Output 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.
Display Type: LED meter with “blackout switch” for darkroom applications
Accuracy 0.1%, ±0.003%/°C over +20 to +40°C range (at recorder output). Useable to  +50°C.

Model 279 ISOPROBE Voltmeter Products and  Accessories

Description Part Number Unit Price
Model 279 Ultra-Stable Isoprobe Rack Mountable Voltmeter, 110V, Probes sold separately M279/110 $ 3,200.00 ORDER NOW
Model 279 Ultra-Stable Isoprobe Rack Mountable Voltmeter, 100V, Probes sold separately M279/100 $ 3,200.00 ORDER NOW
Model 279 Ultra-Stable Isoprobe Rack Mountable Voltmeter, 220V, Probes sold separately M279/220 $ 3,200.00 ORDER NOW
Probes for all of the above sold separately and listed below
Probes Part Number Unit Price
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.
Model 1034E Standard Miniature Probe, End Viewing M1034E $    975.00 ORDER NOW
Model 1034S Standard Miniature Probe, Side Viewing M1034S $    975.00 ORDER NOW
Model 1034EH High Resolution Probe, End Viewing M1034EH $ 1,400.00 ORDER NOW
Model 1034EL Low Resolution Probe, End Viewing M1034EL $ 1,175.00 ORDER NOW
Model 1034SL Low Resolution Probe, Side Viewing M1034SL $ 1,175.00 ORDER NOW
Model 1034T Transparent Miniature Probe M1034T $ 1,150.00 ORDER NOW

(**Monroe/Trek products do not qualify for flat rate shipping!)

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