- Other Seaward Sites:
Milliohmmeter 4 Terminal Test Standards MTS
two models designed for the simple, easy and precise calibration of all digital low resistance ohmmeters and traditional Kelvin/Thompson bridges.
The Milliohmmeter Test Standards are designed for the simple and easy calibration of low resistance ohmmeters and Kelvin / Thomson bridges. The true four terminal resistance values are switch selected and provision is made for + and - full scale values. A four terminal zero value may also be selected, thus making zero and full scale calibration of instruments simplicity itself. Two models are available, the MTS1A which has 11 values from 1 mohm to 100 Kohm and the MTS2 which has 10 values from 400 micro-ohm to 400 Kohm, making it ideally suited for the calibration of digital instruments with a long scale length of 4000 or 6000 count.
The Test Standards are housed in a rugged bench portable aluminium case with tilt handle. The internal standards are manufactured from premium quality resistance wire with low temperature and load coefficient. For the selection of the standards, a special switch of our own construction is used ensuring a long and trouble free operating life. The units are supplied complete with a calibration certificate.
Suitable for the Aerospace Industry.
|
Resistance Value (Ohms ) |
Uncertainty of adjustment at 20° C |
Dissipation Max Watts |
Current Max A |
Typical Temp. Coeff. 15 to 20°C |
| 100 kΩ | ± 0.01% | 0.1 | 1 mA | <10 ppm |
| 10 kΩ | ± 0.01% | 0.1 | 3 mA | <10 ppm |
| 1kΩ | ± 0.01% | 0.6 | 25 mA | <10 ppm |
| 100 Ω | ± 0.01% | 0.6 | 75 mA | <10 ppm |
| 19 Ω | ± 0.01% | 0.43 | 150 mA | <10 ppm |
| 10 Ω | ± 0.01% | 0.45 | 212 mA | <10 ppm |
| 1.9 Ω | ± 0.01% | 0.475 | 500 mA | <10 ppm |
| 1 Ω | ± 0.01% | 0.56 | 750 mA | <10 ppm |
| 100 mΩ | ± 0.01% | 0.625 | 2.5 A | <10 ppm |
| 10 mΩ | ± 0.05% | 0.25 | 5 A | <10 ppm |
| 1 mΩ | ± 0.05% | 0.1 | 10 A | <10 ppm |
|
Resistance Value |
Uncertainty of Adjustment @ 20°C |
Watts Max W |
Current Max A |
Typical Temp Coefficient |
| 400kΩ | ±0.01% | 0.1 | 0.45mA | <10ppm |
| 40kΩ | ±0.01% | 0.1 | 1.5mA | <10ppm |
| 4kΩ | ±0.01% | 0.1 | 5mA | <10ppm |
| 400Ω | ±0.01% | 0.1 | 15mA | <10ppm |
| 40Ω | ±0.01% | 0.1 |
50mA |
<10ppm |
| 4Ω | ±0.01% | 0.1 | 150mA | <10ppm |
| 400mΩ | ±0.01% | 0.1 | 500mA | <10ppm |
| 40mΩ | ±0.01% | 0.1 | 1.5A | <10ppm |
| 4mΩ | ±0.1% | 0.4 | 10A | <10ppm |
| 400μΩ | ±0.1% | 0.04 | 10A | <10ppm |
Working Temperature
+5 to +40°C
Storage Temperature
+5 to +50°C
Dimensions
215mm x 88mm x 250mm (W H D) approx
Mass
2.8kg approx
Terminal
4mm binding posts will accept spade tags and 4mm banana plugs. Low thermal E.M.F. types are used for the potential terminals
Switches
Combination switch with low thermal contacts for the potential selection and low resistance contacts for the current selection
