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MC642 Programmable Resistance Decade

  • Real resistors switched by relays
  • Resistance range 0.1 Ω - 20 MΩ
  • Accuracy 0.02%
  • Maximal load 5 W
  • Maximal voltage 200 Vpk
  • Resolution from 1 μΩ
  • Range of Pt sensor temperature simulation -200°C - +850°C
  • Connection 2, 3, 4-wire
  • Remote control RS232, optionally USB, IEEE488, Ethernet

Model MC642 is programmable real-resistance decade with range from 0.1 Ω to 20 MΩ. Basic accuracy is 0.02 %, best resolution on the lowest range is 1 μΩ. Decade consists of high load resistors switched with combination of relays. Apart from resistance function, the MC642 can be also used as an RTD temperature sensor simulatior (temperature setting in degree of Celsius or Fahrenheit). Instrument can be controlled via RS232, USB, LAN or GPIB interface.

Typical Use

Resistance decade is determined for use in industry as a device for reistance-based sensor simulation, ohmmeter and multimeter testing, quality testing and so on. Decade can be ordered as 19" module for easy assembling into a 19" rack. Module height is 3HE.

General Specifications

Maximal Voltage: 200V pk
Maximal Current: 500mA
Maximum Load: 5W
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: 4.5kg

Resistance Accuracy

Range/Resolution Accuracy
100.000Ω - 200.000Ω 0.05% + 15mΩ
200.01Ω - 2.00000Ω 0.05% + 15mΩ
2.0001Ω - 20.000Ω 0.05% + 15mΩ
20.001Ω - 200.000Ω 0.05% + 15mΩ
200.1Ω - 2000.00Ω 0.02%
2.0001kΩ - 20.0000kΩ 0.02%
20.001kΩ - 200.000kΩ 0.02%
0.20001MΩ - 2.00000MΩ 0.02%
2.0001MΩ - 20.0000MΩ 0.05%

Frequency Response

R AC/DC difference
100Hz 1kHz 10kHz
100Ω 0.05% 0.20% 5.00%
0.02% 0.10% 0.50%
10Ω 0.01% 0.02% 0.10%
100Ω 0.01% 0.10% 0.60%
1kΩ .06% 0.60% 6.00%
10kΩ .60% 6.00%  
100kΩ 6.00%    

Pt simulation accuracy

Temperature Accuracy
Pt10 - Pt99
Accuracy
Pt100 - Pt20000
-200....0.0°C 0.5°C 0.01°C
0.001....850°C 1.0°C 0.02°C

Ni simulation accuracy

Temperature Accuracy
Ni10 - Ni99
Accuracy
Ni100 - Ni20000
-60....300.0°C 0.4°C 0.1°C

Accessories (included)

Application Software 1pc
RS232 Cable 1pc

Options (extra ordered)

IEEE488/USB/LAN/GPIB
Table Version
19" rack