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C.C.Steven and Associates, 1363 Donlon Street, Ventura, CA  93003 since 1978  

ph:  805-658-0207          fax:  805-658-2789            static@ccsteven.com

279 Isoprobe VoltmeterModel 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

Specification:

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

$ 2,165.00

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Model 279 Ultra-Stable Isoprobe Rack Mountable Voltmeter, 100V, Probes sold separately

M279/100

$ 2,165.00

Model 279 Ultra-Stable Isoprobe Rack Mountable Voltmeter, 220V, Probes sold separately

M279/220

$ 2,381.00

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

$    835.00

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Model 1034S Standard Miniature Probe, Side Viewing

M1034S

$    835.00

Model 1034EH High Resolution Probe, End Viewing

M1034EH

$ 1,125.00

Model 1034EL Low Resolution Probe, End Viewing

M1034EL

$ 1,045.00

Model 1034SL Low Resolution Probe, Side Viewing

M1034SL

$ 1,045.00

Model 1034T Transparent Miniature Probe

M1034T

$ 1,045.00

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