CALIBRATOR Multi Function Calibrator
For AC/DC Voltage Current Thermocouples Power Energy
Model MC140

UK Tel: +44 1788 519911
US Tel: +1 631 615 6279
Email :
Email :

return to homepage | | contact us

Multi-function voltage current calibrator

AC/DC voltage 1000Vrms, current 20Arms


Optional 1000A test coil for current probes and current transformers


Power Calibrator to 0-100kW (+1.0 to -1.0 PF)


Built in multimeter


Deviation control along with measurement
uncertainty readout


0.003% basic dc accuracy


0.025% basic ac accuracy


10 step memory and pass fail output


Supplied with RS232 and IEEE-488 interfaces
UKAS/NIST Traceable


Calibration software & database


MC140 Datasheet pdf | MC140 User Manual pdf | MC140 Brochure | MC140 Options/Accessories


About the MC140 calibrator
The Multifunction Calibrator MC140 functions as a Voltage Calibrator, Current Calibrator, Power Calibrator, Resistance Calibrator, Capacitance Calibrator and a Thermocouple Calibrator. Its high accuracy and precision means it is ideal as a calibration standard in calibration laboratories. It also has the feature of supplying several different waveshapes in additional to its sinusoidal output. This feature makes it ideal for testing meters which are true rms reading or crest factor sensitive.  These signals are also suitable for the basic calibration of oscilloscopes. The calibrator has the capability of measuring temperature with TC and RTD temperature sensors.  A built-in multimeter can be used independently or in simultaneous operation with the calibrator output.

The operation of the MC140 display, front panel keyboard and front panel terminals can be seen by clicking on the links below.

Display Front panel keyboard Front panel terminals


DC voltage

AC voltage

range % of value + % of range
0V - 20mV 0.05 + 0.0 + 10V
20mV - 200mV 0.01 + 0.0 + 10V
200mV - 2V 0.003 + 0.0008
2V - 20V 0.003 + 0.0005
20V - 240V 0.003 + 0.0005
240V - 1000V 0.005 + 0.005
range % of value
+ % of range
% of value
+ % of range
20Hz - 10kHz 10kHz - 50kHz
1mV - 20mV 0.20 + 0.05 + 20V 0.20 + 0.10 + 20V
20mV - 200mV 0.1 + 0.03 + 20V 0.15 + 0.05 + 20V
200mV - 2V 0.025 + 0.005 0.05 + 0.01
2V - 20V 0.025 + 0.005 0.05 + 0.03
20V - 240V 0.025 + 0.010 - -
240V - 1000V 0.03 + 0.02 * - -

* valid for f < 1000Hz

DC current

AC current

range % of value + % of range
1A - 200A 0.05 + 0.0 + 20 nA
200A - 2mA 0.02 + 0.005
2mA - 20mA 0.01 + 0.003
20mA - 200mA 0.01 + 0.003
200mA - 2A 0.015 + 0.005
2 A - 20A 0.02 + 0.010

range % of value
+ % of range
% of value
+ % of range
20Hz - 1kHz 1kHz - 5kHz
1A - 200A 0.15 + 0.0 + 20nA 0.30 + 0.10 + 20nA
200A - 2mA 0.07 + 0.01 0.20 + 0.05
2mA - 20mA 0.05 + 0.005 0.20 + 0.05
20mA - 200 mA 0.05 + 0.005 0.20 + 0.05
200mA - 2A 0.05 + 0.005 - -
2A - 20A 0.10 + 0.03 - -

When option 130-50 Current coil is used, add uncertainty 0.3 % of the set current to the value specified in the above table. Output current is multiplied by factor 50.

Resistance (4-wire)

Capacitance (4-wire)

range % of value
0Ohm - 100Ohm 0.03 + 10mOhm
100Ohm - 400Ohm 0.015
400Ohm - 2kOhm 0.015
2kOhm - 10kOhm 0.015
10kOhm - 40kOhm 0.015
40kOhm - 200kOhm 0.015
200kOhm - 1MOhm 0.05
1MOhm - 4MOhm 0.1
4MOhm - 20MOhm 0.2
20MOhm - 50MOhm 0.5

Maximum allowed voltage on the load is 8Vpk.

range % of value
900pF - 2.5nF 0.5 + 15pF
2.5nF - 10nF 0.5 + 5pF
10nF - 50nF 0.5
50nF - 250nF 0.5
250nF - 1F 0.5
1F - 3.5F 1.0
3.5F - 5F 1.0
5F - 10F 1.5
10F - 50F 2.0

Maximum allowed voltage on the load is 8Vpk.


DC power, energy

type PWM (pos, neg, sym) HF *
range 0.1Hz - 100kHz 0.1Hz - 20MHz
frequency unc. (%) 0.005 0.005
amplitude 1mV - 10V 2V
amplitude unc. (%) 0.1 10
ratio 0.00 - 1.00 - -
ratio unc.(%) 0.05 - -

* Rise time < 5ns

quantity range % of value
+ % of range
voltage 200mV - 240V see voltage table
current 2mA - 10A 0.05 + 0.01

AC power, energy

Resistance temperature sensor simulation

quantity range uncertainty
voltage 200mV - 240V see voltage table
current 2mA - 10A 0.05% + 0.01%
frequency 40Hz - 400Hz 0.005
power factor -1 - +1 0.005 - 0.0005
phase 0 - 360 0.15 - 0.25

Setting time in energy mode 10s - 1999s.
Uncertainty of AC power depends on set value of voltage, current, phase. The best uncertainty is 0.08%. Uncertainty in energy mode depends on set value of voltage, current, phase and time. The best uncertainty is 0.09%.

types Pt 1.385, Pt 1.392, Ni
range of R0 20Ohm - 2kOhm
range of temperature -2000C - 850C
temperature uncertainty 0.04C - 0.5C
temperature scale ITS 90, PTS 68

Thermocouple simulation


types R, S, B, J, T, E, K, N
range of temperature -250C - 1820C
temperature uncertainty 0.4C - 4.0C
temperature scale ITS 90, PTS 68

quantity range uncertainty
VDC (DC voltage) 0 - 12 V 0.01% + 100V
mVDC (DC voltage) 0 - 2000mV 0.01% + 10V
mADC (DC current) 0 - 25mA 0.02% + 1A
FREQ (Frequency) 1Hz - 15kHz 0.005%
R4W (Resistance) 0 - 2kOhm 0.02% + 100mOhm
TRTD (RTD sensors) -150 - +600C 0.1C
TTC (TC sensors) -250 - +1820C 0.4 - 4C
SGS (strain gauge sensor) * depends on sensor 0.01% + 10V + sensor unc.

* Supplying voltage 2 to 10V DC, max. current 40mA, input resistance > 100 MOhm sensitivity 0.5 - 100mV/V, displayed unit settable


Basic Functions
In the Voltage Calibrator mode, the Multifunction Calibrator generates DC/AC voltages up to 1000V and in the Current Calibrator mode it generates DC/AC currents up to 20A. Using a 50-turn transformer, the AC current range can be extended to 500A. The best accuracy of the calibrator on DC voltage ranges is 0.0035%, on AC voltage ranges 0.03%, on DC current ranges 0.013% and on AC current ranges 0.055%. The frequency range is from 20Hz to 50kHz. The calibrator can generate periodic non-harmonic signals with a defined crest factor. Such signals can be used to test the sensitivity of multimeters to distorted signals. The Multifunction Calibrator simulates both resistance and capacitance. The resistance range extends to 50MOhm and the capacitance range is from 1nF to 50F. The precision of both quantities is sufficient for the calibration of commonly used hand-held multimeters. The basic accuracy of the resistance ranges and capacitance ranges is 0.03%, and 0.5% respectively. The resistance calibration may be used with both DC and AC signals up to 1kHz.

The frequency function of the calibrator makes it possible to generate a square wave signal with adjustable and calibrated duty cycle, frequency and amplitude in the range from 1mV to 10V in the frequency band up to 10kHz. In the HF mode a square wave signal up to 20MHz with a fast risetime can be generated. The frequency function is suitable for calibration of frequency ranges in multimeters, and for calibration of the channel sensitivities and time bases of oscilloscopes.

In the Power Calibration mode, the MC140 can be used as a source to calibrate DC and single-phase AC watt meters, power analyzers, and energy meters. In this mode, the output voltage can be set up to 240V, the output current up to 10A, and the power factor from -1.0 to +1.0 lead/lag in the frequency band from 20Hz to 400Hz. The current capability of the voltage output is 30 mA so that analog watt meters, which usually have lower input impedances at their voltage input, may be calibrated. For calibration of thermometers and temperature regulators, the temperature function is simulated by the Multifunction Calibrator. It is able to simulate all commonly used Pt and Ni resistance sensors as well as TC sensors of R, S, B, J, T, E, K and N types. Compensation of the TC cold junction is made either by entering a value from the keyboard, or automatically by measuring the ambient temperature with a Pt-100 sensor. The precision of the simulated resistance and TC sensors depends on set value and type of the sensor. For resistance sensors the uncertainty band is in the range from 0.04C to 0.5C, for TC sensors from 0.4C to 4.0C.

Calibrator - Tester
The Multifunction Calibrator can be used both as a precision signal source for a device under test and as a meter to measure the resultant voltages generated by the device. Programmable capability of the calibrator enables the user to set a 10 steps sequence  testing procedure. The testing can run automatically, upon completion, PASS/FAIL status is displayed. With the testing function, isolated relay contacts activated by the FAIL indicator, make it possible to control other equipment.

Built-in multimeter
An internal multimeter with basic ranges of 20mA, 200mV, 10V and 2kOhm is a standard feature of the Multifunction Calibrator. With an accuracy of 0.01%, it enables the user to measure the output signals of various types of transducers. With external strain gauge sensors, pressure, torsion, strength, etc. can be measured and displayed.

User friendly
The MC140 Calibrator is equipped with a number of other functions which make it extremely easy to use. Among them are capabilities to set relative deviations from the actual value of the selected output signal, the continuous display of the output signal uncertainty, and the internal calibration procedure. The large, easy to read, comprehensive luminescent display contains all of the necessary information to set up any of the Multifunction Calibrator's functions. In addition, frequently used functions have specific keys assigned to them. The calibrator is equipped with the IEEE-488.2 interface and with the RS-232 serial interface.

Accessories included

Power line cable 1 pc
Operation manual 1 pc
Option 10/11 Test cable 2 pcs
Option 40

Test cable for built-in multimeter, 2 banana terminals for DC voltage and current measurement.

1 pc


Option 60

Test cable for built-in multimeter, 4 banana terminals for resistance measurement as well as Pt/Ni sensor temperature measurement.

1 pc


Option 70

4-wire resistance adapter. The adapter provides a four wire return to the calibrator for making resistance measurements.

1 pc


Optional Accessories

Option 100 Cable adaptor for distance change between front panel terminals to 3/4 inch
Option 140-50 Current coil 25/50 turns, simulating 1000Arms. Suitable for clamp-on current transformer testing.


Option 140-01 Cable adapter for multimeters.

The adapter provides support for the meter under test as well as a simple cable connection to the calibrator front panel terminals.

The Adapter is equipped with a built-in Pt-100 temperature sensor. The internal meter can measure ambient temperature and display it on the screen and automatically make cold junction compensation when the TC temperature sensor simulation is selected.


Option 140-41 Cable adapter for simultaneous applications.

Cable adapter is designed for low-voltage/current applications of 20Vdc and 200mAdc, two ranges of the adapter. The first contains terminals with the calibrator output signals, the second contains internal multimeter input terminals. Various calibration tasks can be fulfilled with the adapter, especially measurements where simultaneous generation of the calibrated signal and response of unit under test are required.

With the adapter, temperatures of external TC temperature sensors can be measured and displayed.

Option 140-02 Set of cables and adapters. It includes Option 140-01, Option 140-41, Option 10 2pcs, Option 11 2pcs, Option 20, Option 30, Option 40, Option 60, Option 70
Option 10 Test cable 20A/1000V (black)
Option 11 Test cable 20A/1000V (red)
Option 20 Test cable BNC/BNC 1m
Option 30 Test cable BNC/banana 1m
Cable GPIB IEEE-488, 2m
Cable RS-232 RS-232, 2m


MC140 Datasheet pdf | MC140 User Manual pdf | MC140 Brochure | MC140 Options/Accessories

Return to homepage