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MC632 Precision Resistance Decade

  • Real resistors switched by relays
  • Resistance range 1 Ω - 1.2 MΩ
  • Accuracy 0.003%
  • Maximal voltage 200 Vpk
  • Resolution from 10 μΩ
  • Range of Pt sensor temperature simulation -200°C - +850°C
  • Connection 2, 3, 4-wire
  • Remote control RS232, optionally USB, IEEE488, Ethernet

Model MC632 is a high accuracy programmable real-resistance decade with range from 1Ω to 1.2mΩ. Basic accuracy is 0.003%, best resolution on the lowest range is 10μΩ. Decade consists of highly stable foil resistors switched with combination of relays. Apart from resistance function, the MC632 can also be used as an RTD temperature sensor simulator (temperature settings in Celsius or Fahrenheit). Instrument can be controlled via RS232, USB, LAN or GPIB interfaces. Decade uses an internal power supply with very low noise level. Instrument can be used also for AC application. Please refer to datasheet for information on frequency response.

Resistance decade is used in calibration laboratories for ohmmeter and multimeter testing and for industries as a device for quality testing as well. Decade can be ordered as 19” module for easy assembling into a 19” rack. Module height is 3HE.

General Specifications

Maximal Voltage: 220v pk
Maximal Current: 500mA
Total power dissipation: 0.25W
TC of used resistors: <1ppm/°C
Reaction time: 6ms
Switching method: Fast/Smooth/Via short/Via open
Terminals: Gold plated terminals 4mm
Remote control: RS232 interface (optional USB, LAN, IEEE488)
Power supply: 115/230Vac, 50/60 HZ
Reference temperatures: +20°C...+26°C
Working temperatures: +5°C...+40°C
Storage temperatures: -10°C...+50°C
Dimensions W  x H x D: 15.3in x 5in x 12.2in
(390mm x 128mm x 310mm)
Weight: 5.2kg

Resistance Accuracy

Range/Resolution Accuracy
1.000 00Ω - 2.000 00Ω 0.002% + 2mΩ
2.000 1Ω - 20.000 0Ω
20.001Ω - 200.000Ω
200.01 1Ω - 2000.0 0Ω 0.003%
2.000 1kΩ - 20.000 0kΩ
20.001kΩ - 200.000kΩ
200.01kΩ - 1200.00kΩ 0.005%

Frequency Response

R AC/DC difference
100Hz 1kHz 10kHz
0.01% 0.02% 0.20%
10Ω 0.01% 0.01% 0.04%
100Ω 0.01% 0.05% 0.50%
1kΩ 0.05% 0.50% 5.00%
10kΩ 0.50% 5.00%  
100kΩ 5.00%    

Pt simulation accuracy

Temperature Accuracy
Pt100 - Pt500
Pt501 - Pt6000
-200 - 0.0°C 0.05°C 0.01°C
0.001 - 200°C 0.06°C 0.015°C
200.001 - 500°C 0.08°C 0.03°C
500.001 - 850°C 0.1°C 0.4°C

Ni simulation accuracy

Temperature Accuracy
Ni100 - Ni500
Ni501 - Ni6000
-60 - 300°C 0.05°C 0.01°C

Accessories (included)

Application Software 1pc
RS232 Cable 1pc

Options (extra ordered)

Table Version
19" module, 3HE