Resistance Thermometry
The Senator Multi-Range, Automatic, Resistance Thermometer Bridge Type 5840D
Features
- 3 Ranges
- Choice of currents
- Direct reading in Ohm
- Readout in temperature K or °C (via computer)
- IEEE-488 interface
- 1µΩ resolution
- Low frequency operation 75Hz
- Recorder output
- Self balancing
- Ratio Mode
For more information about this product contact Tinsley
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The Tinsley SENATOR Thermometer Bridge is a multi-range Automatic Resistance Thermometer Bridge. Using the well proven inductive division principle with unique circuitry, the SENATOR provides accurate AC measurement of resistance up to 1100 Ohm for high precision temperature applications to 1 millidegree. No initial setting-up is required and calibration may be readily verified using suitable certified resistance standards such as the Tinsley 5685 range.
Resistance - Temperature Readout
Precise true resistance measurement is clearly displayed on the high-stability digital readout with a resolution of 1m Ohm on the 10 Ohm range. The reading can also be transferred over the IEEE-488 interface to a computer controller for temperature conversion. The resultant temperature calculation is then sent back for display on the SENATOR front panel in units of K or °C. Suitable software is available from Tinsley to convert the AC resistance measurement into temperature and to calculate the constants of 25 Ohm Platinum Thermometers from ITS-90 Resistance-Temperature data.
3 Resistance Ranges - Applications
The built-in range selection of 10 Ohm, 100 Ohm and 1 kOhm is very desirable and renders the SENATOR Resistance Thermometer Bridge ideal for use in a wide range of applications for high precision temperature measurements.
1. The 10 Ohm range is ideal for use for capsule 25 Ohm Platinum Thermometers, Tinsley type 5187L.
2. The 100 Ohm range is the most suitable for long stem 25 Ohm Platinum Thermometers such as Tinsley type 5187SA.
3. The 1000 Ohm range is selected for 100 Ohm Platinum Thermometers above 0°C.
Specifications
See the table below for a run-down of this product's specifications.
Range |
Current
ma +/- 1% |
Accurancy
relative to Calibration Standard |
Resolution |
Selected |
Measured |
10 Ω |
0 to 16 Ω |
0.2 |
5ppm+/- 5 µ |
1µ |
0.5 |
3ppm+/- 3 µ |
1.0 |
2ppm+/- 2 µ |
2.0 |
2ppm+/- 2 µ |
5.0 |
2ppm+/- 2 µ |
10.0 |
2ppm+/- 2 µ |
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100 Ω |
0 to 160 Ω |
0.2 |
2ppm+/- 20 µ |
10
µ |
0.5 |
1ppm+/- 10 µ |
1.0 |
1ppm+/- 10 µ |
2.0 |
1ppm+/- 10 µ |
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1000 Ω |
0 to 1600 Ω |
0.2 |
5ppm+/- 100 µ |
100
µ |
0.5 |
5ppm+/- 100µ |
1.0 |
5ppm+/- 100µ |
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'Self Heating Check' Current - 1.414 x selected current |
Internal Standards - 10 Ω , 100 Ω . and 1000 Ω with trim adjusters for calibration to a certified standard resistor. |
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Zero Stability - Minimal drift with time and temperature |
External Standards - The bridge will read ratio Rx to
10 Ω , 100
Ω and 1000
Ω standard resistors. |
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Calibration Drift - 2ppm / month - Internal Standards,
2ppm / year - External Standards |
Quadrature Balance - Fully automatic balance of thermometer reactance with visual indication if overloaded. |
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Self-Balance Speed - 10 seconds from unknown resistance to 1ppm accuracy (100
Ω range). |
Power Requirements - 115/230 Volts; 50/60 Hz, 250 VA. |
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Accuracy - Better than 0.5 millidegree at 0°C (for 25
Ω PRT's). |
Net weight - 16kg; Dimensions - 480 x 160 x 400mm. |
For more information about this product contact Tinsley
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