DTM-133
Digital hall effect teslameter - gaussmeter
The DTM-133 Digital Teslameter offers accurate, medium resolution measurement of magnetic flux densities at an economic price.
Features:
- 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.
- 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
DTM-133 Specifications
| 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 120,000 | 3T | 50µ T | ± 0.01% | -80 | ± 12 |
| LPT-230 | 4 x 1.6 | 1 in 12,000 | 0.3T | 5µ T | ± 0.03% | -620 | ± 8 |
| MPT-132 | 1 x 0.5 | 1 in 12,000 | 3T | 50µ T | ± 0.03% | -140 | ± 40 |
| MPT-230 | 1 x 0.5 | 1 in 12,000 | 0.3T | 5µ T | ± 0.03% | -620 | ± 8 |
The following specifications refer to DTM-133 with LPT-130 probe (standard size probe)
DTM-133 with MPT-132 probe (miniature probe)
Ranges
4 ranges, selectable from front panel
- 0.3
- 0.6
- 1.2
- 3.0 tesla full scale
Note: Resolution depends on the range selected.
| Range selected | Resolution (µ T) |
|---|---|
| 0.3 tesla | 50 |
| 0.6 tesla | 100 |
| 1.2 tesla | 200 |
| 3 tesla | 500 |
- 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 with MPT-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