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.

MC632 Datasheet pdf MC632 User Manual pdf

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
R	100Hz	1kHz	10kHz
1Ω	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	Accuracy 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	Accuracy Ni501 - Ni6000
-60 - 300°C	0.05°C	0.01°C

Accessories (included)

Application Software	1pc
RS232 Cable	1pc

Options (extra ordered)

IEEE488/USB/LAN/GPIB

Table Version

19" module, 3HE

MC632 Datasheet pdf MC632 User Manual pdf