Cropico MTS Resistance Standard

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. 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.

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Key Features

True 4 Terminal Standards
Switch Selectable Values
Polarity Reversal Switch
Four Terminal Zero
High Current Capability
Two Models Available
MTS1A: 1mOhm to 100kOhm and MTS2: 400 mOhm to 400 kOhmW
Temperature Supplied Complete with Calibration Certificate <=2 ppm/K

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Cropico MTS data sheet

Technical Specification

Terminals	4 mm binding posts will accept spade tags and 4mm banana plugs. Low thermal emf types are used for the potential connections.
Working Temperature	5...40°C
Storage Temperature	+5...+40°C
Switches	Special Combination switch with low thermal gold/silver contacts for the potential selection and low resistance contacts for the current selection
Dimensions	215 x 88 x250mm (W D H) 1/2 19&apos&apos rack 2U high
Weight	6.2 lbs. (2.8kg) approx.

Model MTS1/A:

Resistance Value (Ohms )	Uncertainty of adjustment at 20° C	Dissipation Max Watts	Current Max A	Typical Temp. Coeff. 15 to 20°C
100KOhms	± 0.01%	0.1	1 mA	<10 ppm
10k Ohm	± 0.01%	0.1	3 mA	<10 ppm
1k Ohm	± 0.01%	0.6	25 mA	<10 ppm
100 Ohm	± 0.01%	0.6	75 mA	<10 ppm
19 Ohm	± 0.01%	0.43	150 mA	<10 ppm
10 Ohm	± 0.01%	0.45	212 mA	<10 ppm
1.9 Ohm	± 0.01%	0.475	500 mA	<10 ppm
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