DTM-133 Series

DS Model (Bench, Serial)

QUICK FACTS

  • Resolution of 1 part in 12,000

  • 4 ranges

  • Maximum field 3 Tesla

  • 6 digit display (5 digit, plus sign)

  • optional RS232 or IEEE488/GPIB communications.

  • Accuracy is ± (0.03% of reading + 0.03% of full scale) with LPT-130 or MPT-132 probe.

PS Model

Panel Mount, GPIB

Ordering Guide

D T M     -    1 3 3     -     D        S

Product Initials

DTM - Digital Teslameter

Series Model

Mount

Style

D - Bench Top

P - Panel Mount

151 - With Temperature Compensation

133 - No Temperature Compensation

152 - With Temperaure Compnesation, 

         Touchscreen Display

333 - No Temperature Compensation, 3-Axis,

         3-Channel, Touch Screen Display

Communication

S - Serial RS232

G - GPIB, IEEE-488

FEATURES

  • Temperature coefficient is 80 ppm / ° C when used with LPT-130, or 140 ppm / ° C when used with MPT-132 probe.

  • Accuracy and temperature specifications include performance of probe.

  • 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.

  • An analog output is available. This is a buffered version of the raw probe signal, and is not corrected for linearity or temperature. It offers an instantaneous field value, (0 to 9kHz)

  • 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

 SPECIFICATIONS

   DTM-151 performance summary when combined with the listed probe.

 

   Probe            Active area (mm)        Resolution of display        Max field         Finest resolution        Accuracy at 25°C        Tempco            Zero Drift   

                                                                                                                                                                                                            ppm /°C                 µT/°C

 

 

  LPT-130               4 x 1.61 in                     1 in 120,000                      3T                      50µT                                ± 0.01%               ± 80                     ± 12

  LPT-230               4 x 1.61 in                     1 in 12,000                     0.3T                        5µT                                ± 0.03%               ± 620                   ± 8

  MPT-132              1 x 0.51 in                     1 in 120,000                      3T                     50µT                                 ± 0.03%               ± 140                   ± 40

  MPT-230              1 x 0.51 in                     1 in 12,000                     0.3T                       5µT                                 ± 0.03%               ± 620                   ± 8

 

  The following specifications refer to DTM-133 with LPT-130 probe (standard size probe).

 

  DTM-133 WITH LPT-130 PROBE (LIMPET PROBE)

 

  Four ranges, selectable from front panel:

          1. 0.3
          2. 0.6
          3. 1.2
          4. 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-133 with LPT-130 probe Filtering ON

 

                  Range selected                                                    Resolution (µT) Display                                                Resolution (µT) serial/GPIB                                           

                     

                        0.3 tesla                                                                               50                                                                                       0.1

                       0.6 tesla                                                                              100                                                                                          1

                       1.2 tesla                                                                              200                                                                                          1

                       3.0 tesla                                                                              500                                                                                          1

 

 

   

         Absolute Accuracy

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

 

        Temperature Stability with LPT-130 Probe

  • ​        scale factor: -80 ppm of reading / ° C max.

  •         Zero drift: ± (12m T + 0.0015% of full scale ) / ° C max.

  •         Effect of probe cable: Add -3ppm / ° C for each metre of probe cable.

 

         Temperature Stability withMPT-132 Probe

  • ​        scale factor: ± (40m T + 0.0003% of full scale ) / ° C max.

  •         zero drift: ± (15m T + 0.0010% of full scale ) / ° C typical. ± (40m T + 0.0015% 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

Recommended Probes for DTM-133 Teslameters 

MPT-132

LPT-130

STANDARD SENSITIVITY

(0.3, 0.6, 1.2, 3.0 Tesla)

MPT-230

LPT-230

HIGH SENSITIVITY

(0.03, 0.06, 0.12, 0.3 Tesla)

Accessories for DTM-133 Teslameters 

Fibre Optic Cable

FTR - Fibre to RS232 Adapter

Serial to D25 Connector and Cable 

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© 2018 by Joey Aguas for Group3 Technology Limited, Auckland, New Zealand