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Milliohmmeter 4 Terminal Test Standards MTS
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.
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.
Cropico MTS
Technical specification
MTS1/A
| Resistance Value （Ohms ） | Uncertainty of adjustment at 20° C | Dissipation Max Watts | Current Max A | Typical Temp. Coeff. 15 to 20°C |
| 100kΩ | ± 0.01% | 0.1 | 1 mA | <10 ppm |
| 10kΩ | ± 0.01% | 0.1 | 3 mA | <10 ppm |
| 1kΩ | ± 0.01% | 0.6 | 25 mA | <10 ppm |
| 100Ω | ± 0.01% | 0.6 | 75 mA | <10 ppm |
| 19Ω | ± 0.01% | 0.43 | 150 mA | <10 ppm |
| 10Ω | ± 0.01% | 0.45 | 212 mA | <10 ppm |
| 1.9Ω | ± 0.01% | 0.475 | 500 mA | <10 ppm |
| 1Ω | ± 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 |
MTS2
| 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 |