Digital Teslameter 150

The DTM-150 Digital Teslameter offers accurate, high resolution measurement of magnetic flux densities.

Features

  • Because the probe characterisation information is stored in the probe assembly itself, any Group3 probe can be used with any Group3 DTM.
  • Two buttons on the front panel are used to select the operation of the teslameter. The following modes can be selected for the display - magnetic field, peak hold of magnetic field, AC component of field.
  • Digital filtering (time averaging) can be enabled to suppress short term fluctuations.
  • Several teslameters with the serial communications option (up to 31) can be formed into a local communications loop, all of them talked to by the one serial port on the control computer. The system can be operated in a trigger mode, where the timing of the measurements by several teslameters can be synchronised
  • Internal switches select serial data format, baud rate, device address, string terminators, filtering, gauss or tesla units, data format, service request action, EOI action, and reset system to defaults.
  • Two analog outputs are available. These are a buffered version of the raw probe signal, and are not corrected for linearity or temperature.
  • All models are available without display or front buttons, for true “Black box” requirements.
  • Panel mount versions are available, and panels with correct cut-outs and mounting hardware.
  • The operating temperature range of the probe and instrument is 0 to 50 ° C

Quick Facts

  • Resolution of 1 part in 600,000
  • 4 ranges
  • Maximum field 3 Tesla
  • 7 digit display
  • Either RS232 or IEEE488/GPIB communications.
  • Accuracy is 0.03% of reading + 0.006% of full scale when used with MPT-132 probe.

Specifications

DTM-150 performance summary when combined with the listed probe.

Probe

Active area (mm)

Resolution of display

Max field

Finest resolution

Accuracy at
25° C

Tempco
ppm /°C

zero drift µT/°C

LPT-130

4 x 1.6

1 in 600,000

3T

1µT

± 0.01%

-80

± 12

LPT-230

4 x 1.6

1 in 600,000

0.3T

0.1µT

± 0.03%

-620

± 8

MPT-132

1 x 0.5

1 in 600,000

3T

1µT

± 0.03%

-140

± 40

MPT-230

1 x 0.5

1 in 600,000

0.3T

0.1µT

± 0.03%

-620

± 8

The following specifications refer to DTM-150 with LPT-130 probe (standard size probe).

DTM-150 with MPT-132 probe (miniature probe)

Four ranges, selectable from front panel:

0.3
0.6
1.2
3.0 tesla full scale

Note: Resolution depends on the range selected, and whether the digital filtering is enabled.

Note: Resolution available at the serial⁄GPIB port is greater than that of the display.

DTM-150 with LPT-130 probe Filtering ON

Range selected

Resolution (µT) Display

Resolution (µT) serial/GPIB

0.3 tesla

1

0.1

0.6 tesla

2

1

1.2 tesla

4

1

3 tesla

10

1

DTM-150 with LPT-130 probe Filtering OFF

Range selected

Resolution (µT) Display

Resolution (µT) serial/GPIB

0.3 tesla

5

0.1

0.6 tesla

10

1

1.2 tesla

20

1

3 tesla

50

1

Absolute Accuracy

± 0.03% of reading ± 0.006% of range at 25° C

Temperature Stability with LPT-130 probe

  • Scale factor: -80 ppm of reading / ° C max.
  • Zero drift: ± (12m T + 0.0003% of full scale ) / ° C max.
  • Effect of probe cable: add -3ppm / ° C for each metre of probe cable.

Temperature Stability with MPT-132 probe

  • Scale factor: -140 ppm of reading / ° C max. (100ppm/ ° C typical)
  • Zero drift: ± (40m T + 0.0003% of full scale ) / ° C max.
  • Effect of probe cable: add -3ppm / ° C for each metre of probe cable.

Frequency

DC, or in AC mode 8 to 3,000 Hz

Update rate

10 fully corrected measurements per second

Display

7 digit, red LED. 8 additional indicators for range, units, peak hold and filter

Enclosure

All metal, with tilt stand on bench models, bezel mount on rack models

Dimensions

217 x 125 x 50mm , weight 1.2 kg