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Gaussmeter Model 915

Teslameter Model 915T

Description
The Model 915/915T is a compact, accurate and stable instrument designed for the measurement of permanent magnet (DC), pulse, and AC magnetic fields with a high degree of resolution. Flux density is displayed on a 4½  digit, bipolar, seven segment LED readout.  A rear panel switch allows the operator to reduce the resolution to 3½  digits when the full capabilities of the instrument are not required. In addition to performing as a Gaussmeter, the unit can measure and hold in memory the peak value of transient, pulsed (one-shot or recurrent) and AC magnetic fields. Operating in the memory mode, these units are ideal for measuring fields produced by half cycle and capacitive discharge magnetizers. They are also useful for verifying performance of AC, ringing circuit and pulse-type magnet stabilizers and demagnetizers. The mode of operation, permanent magnet (DC), AC or peak, is selected by a pushbutton switch. Peak mode enables pulsed magnetic fields to be measured for maximum value with the highest reading held in memory. The five ranges in DC (three in AC) are selected by a rotary range selector. The internal calibration circuit is factory adjusted with 0.2% accuracy, certified traceable to the National Institute of Science and Technology. All Hall Effect Probes are marked with their own calibration constant

A wide selection of both transverse and axial Hall Effect Probes are available to measure many different configurations of magnetic fields. The optional digital dual limit comparator is ideally suited to production line testing. Minimum and maximum acceptable limits are set on the digital comparator; the operator need only look at the indicator lights, resulting in less operator fatigue and error. The BCD output from the display is compared with the thumbwheel limit set points resulting in an accurate HI-GO-LO indication. The HI, GO, LO and NO GO (+5 VDC 30 ma) signals are available on the rear panel. The IEEE-488, RS232 and digital dual limit comparator require the double wide or rack mount cabinet.

    Features

  • Measures DC, AC (RMS), and Pulsed
    Peak Fields
  • Wide Measurement Range (Switchable)
  • 0.01 to 100,000 Gauss (Model 915)
  • 0.01mT to 10 Tesla (Model 915T)
  • High Resolution 4½ Digit Display
  • Built-In Precision Calibration

 

    Options

  • BCD Output
  • IEEE-488 Interface
  • RS232C Interface
  • Dual Limit (HI-GO-LO) Comparator
  • 19" Rack Mount
  • Wide Variety of Hall Probes Available

Specifications

Full-Scale Range:
Model 915-10, 100, 1K, 10K, 100K Gauss
Model 915T- 1mT, 10mT, 100mT, 1T, 10 Tesla
Modes of Operation: Permanent Magnet (DC), AC and Peak
DC Accuracy: ± (0.4% of reading ± 0.1% of range ± 1 digit)

AC Accuracy:

Range

100K Gauss

10K Gauss

1K Gauss

Frequency

20 to 40,000 Hz

20 to 20,000 Hz

20 to 4,000 Hz

3 ½ Digit Accuracy

± (0.5% R ± 5 digit) Max

4 ½ Digit Accuracy

± (0.5% R ± 50 digit) Max

Peak Reading Accuracy: Accuracy ± 0.5% F.S.

Analog Output: ± 1 volt via BNC connector. Instrument accuracy + 0.2% of range. (Minimum 100K Ohm load.)

NOTE: Hall Effect Probes have a temperature coefficient and linearity which must be added to overall accuracy.

Operating Temperature: 0° C to 40° C, 32° F to 104° F

Temperature Coefficient: 0.05%/° C (instrument only)

Power Requirements: 115/230 VAC 50/60 Hz. 30VA. Set by internal switch.

Dimensions: Single Wide Double Wide Rack Mount

Height: 3.5 in (8.89 cm)
Width 8.5 in (21.6 cm) 17 in (43.2 cm)
Height 4 in (10.2 cm)  
Depth 13 in (33 cm)  

Specifications subject to change without notice.

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Contact our factory for additional information.
Magnetic Instrumentation Inc., 8431 Castlewood Dr., Indianapolis, IN 46250-1534,
E-mail: maginst@maginst.com, Tel. 317-842-7500, Fax 317-849-7600