CALIBRATOR Multi Function Calibrator
For AC/DC
Voltage Current Thermocouples Power Energy
Model MC140 |
Powertek
UK Tel: +44 1788 519911
US Tel: +1 631 744 0294
Email : info@powertekuk.com |
return to homepage | info@powertekuk.com
| contact us
 |
-- AC/DC voltage
1000Vrms, current 20Arms
-- Optional
1000A test coil for current
transformers
-- Power Calibrator to
2400 W (+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
|
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. Having very low uncertainties, it is ideal as a standard of these
electric quantities in calibration laboratories. It also has the feature of supplying
several different waveshapes in additional to the traditional 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.
Basic Functions
In the Voltage Calibrator mode, the Multifunction Calibrator generates DC/AC
voltages up to 1000 V and in the Current Calibrator mode it generates DC/AC currents up to
20 A . Using a 50-turn transformer, the AC current range can be extended to 1000 A. 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 20 Hz to 50 kHz. 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 50 MOhm and the capacitance range is from 1 nF to 50
µF. 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 1 kHz.
Operation
The operation of the MC140 display, front
panel keyboard and front panel terminals can be seen illustrated by clicking on the links
below.
Specifications
DC voltage
| range |
%
of value + % of range |
| 0 µV - 20 mV |
0.05 + 0.0 + 10 µV |
| 20 mV - 200 mV |
0.01 + 0.0 + 10 µV |
| 200 mV - 2 V |
0.003 + 0.0008 |
| 2 V - 20 V |
0.003 + 0.0005 |
| 20 V - 240 V |
0.003 + 0.0005 |
| 240 V - 1000 V |
0.005 + 0.005 |
AC voltage
| range |
%
of value
+ % of range |
%
of value
+ % of range |
| |
20 Hz - 10 kHz |
10 kHz - 50 kHz |
| 1 mV - 20 mV |
0.20 + 0.05 + 20 µV |
0.20 + 0.10 + 20 µV |
| 20mV - 200mV |
0.1 + 0.03 + 20 µV |
0.15 + 0.05 + 20 µV |
| 200 mV - 2 V |
0.025 + 0.005 |
0.05 + 0.01 |
| 2 V - 20 V |
0.025 + 0.005 |
0.05 + 0.03 |
| 20 V - 240 V |
0.025 + 0.010 |
- - |
| 240 V - 1000 V |
0.03 + 0.02 * |
- - |
DC current
| range |
%
of value + % of range |
| 1 µA - 200 µA |
0.05 + 0.0 + 20 nA |
| 200 µA - 2 mA |
0.02 + 0.005 |
| 2 mA - 20 mA |
0.01 + 0.003 |
| 20 mA - 200 mA |
0.01 + 0.003 |
| 200 mA - 2 A |
0.015 + 0.005 |
| 2 A - 20 A |
0.02 + 0.010 |
AC current
| range |
%
of value
+ % of range |
%
of value
+ % of range |
| |
20 Hz - 1 kHz |
1 kHz - 5 kHz |
| 1 µA - 200 µA |
0.15 + 0.0 + 20 nA |
0.30 + 0.10 + 20 nA |
| 200 µA - 2 mA |
0.07 + 0.01 |
0.20 + 0.05 |
| 2 mA - 20 mA |
0.05 + 0.005 |
0.20 + 0.05 |
| 20 mA - 200 mA |
0.05 + 0.005 |
0.20 + 0.05 |
| 200 mA - 2 A |
0.05 + 0.005 |
- - |
| 2 A - 20 A |
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)
| range |
%
of value |
| 0 Ohm - 100 Ohm |
0.03 + 10 mOhm |
| 100 Ohm - 400 Ohm |
0.015 |
| 400 Ohm - 2 kOhm |
0.015 |
| 2 kOhm - 10 kOhm |
0.015 |
| 10 kOhm - 40 kOhm |
0.015 |
| 40 kOhm - 200 kOhm |
0.015 |
| 200 kOhm - 1 MOhm |
0.05 |
| 1 MOhm - 4 MOhm |
0.1 |
| 4 MOhm - 20 MOhm |
0.2 |
| 20 MOhm - 50 MOhm |
0.5 |
Maximum allowed voltage on
the load is 8 Vpk. |
Capacitance
(4-wire)
| range |
%
of value |
| 900 pF - 2.5 nF |
0.5 + 15 pF |
| 2.5 nF - 10 nF |
0.5 + 5 pF |
| 10 nF - 50 nF |
0.5 |
| 50 nF - 250 nF |
0.5 |
| 250 nF - 1 µF |
0.5 |
| 1 µF - 3.5 µF |
1.0 |
| 3.5 µF - 5 µF |
1.0 |
| 5 µF - 10 µF |
1.5 |
| 10 µF - 50 µF |
2.0 |
Maximum allowed voltage on
the load is 8 Vpk. |
Frequency
| type |
PWM (pos, neg, sym) |
HF * |
| range |
0.1 Hz - 100 kHz |
0.1 Hz - 20 MHz |
| frequency
unc. (%) |
0.005 |
0.005 |
| amplitude |
1 mV - 10 V |
2 V |
| amplitude
unc. (%) |
0.1 |
10 |
| ratio |
0.00 - 1.00 |
- - |
| ratio
unc.(%) |
0.05 |
- - |
DC power, energy
| quantity |
range |
%
of value
+ % of range |
| voltage |
200 mV - 240 V |
see voltage table |
| current |
2 mA - 10 A |
0.05 + 0.01 |
AC power, energy
| quantity |
range |
uncertainty |
| voltage |
200 mV - 240 V |
see voltage table |
| current |
2 mA - 10 A |
0.05 % + 0.01 % |
| frequency |
40 Hz - 400 Hz |
0.005 |
| power factor |
-1 - +1 |
0.005 - 0.0005 |
| phase |
0 - 360 ° |
0.15 ° - 0.25 ° |
Setting time in energy mode
10 s - 1999 s.
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 %. |
Resistance
temperature sensor simulation
| types |
Pt 1.385, Pt 1.392, Ni |
| range
of R0 |
20 Ohm - 2 kOhm |
| range
of temperature |
-200 °C - 850 °C |
| temperature
uncertainty |
0.04 °C - 0.5 °C |
| temperature
scale |
ITS 90, PTS 68 |
Thermocouple
simulation
| types |
R, S, B, J, T, E, K, N |
| range
of temperature |
-250 °C - 1820 °C |
| temperature
uncertainty |
0.4 °C - 4.0 °C |
| temperature
scale |
ITS 90, PTS 68 |
Multimeter
| quantity |
range |
uncertainty |
| VDC (DC voltage) |
0 - ± 12 V |
0.01 % + 100 µV |
| mVDC (DC voltage) |
0 - ± 2000 mV |
0.01 % + 10 µV |
| mADC (DC current) |
0 - ± 25 mA |
0.02 % + 1 µA |
| FREQ (Frequency) |
1 Hz - 15 kHz |
0.005 % |
| R4W (Resistance) |
0 - 2 kOhm |
0.02 % + 100 mOhm |
| TRTD (RTD sensors) |
-150 - +600 °C |
0.1 °C |
| TTC (TC sensors) |
-250 - +1820 °C |
0.4 - 4 °C |
| SGS (strain gauge sensor) * |
depends on sensor |
0.01 % + 10 µV + sensor unc. |
* Supplying
voltage 2 to 10 V DC, max. current 40 mA, input resistance > 100 MOhm
sensitivity 0.5 - 100 mV/V, displayed unit settable |
Basic
Functions
In the Voltage Calibrator mode, the Multifunction Calibrator generates DC/AC
voltages up to 1000 V and in the Current Calibrator mode it generates DC/AC currents up to
20 A . Using a 50-turn transformer, the AC current range can be extended to 500 A. 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 20 Hz to 50 kHz. 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 50 MOhm and the capacitance range is from 1 nF to 50
µF. 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 1 kHz.
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 1 mV to 10 V in the frequency band up to 10 kHz. In the HF mode a square wave
signal up to 20 MHz with a very low risetime can be generated. The frequency function is
suitable for the calibrations of corresponding frequency ranges of multimeters, and for
calibration of the channel sensitivities and time bases of the 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 240 V, the output current up to 10A, and the the power factor in
range from -1 to +1 in the frequency band from 20 Hz to 400 Hz. 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 the 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 0.04 °C to 0.5 °C, for TC sensors from 0.4°C to
4.0 °C.
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 10 steps of a testing
procedure. The testing can run automatically, and after it is completed, 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 20 mA, 200 mV, 10 V and 2 kOhm is a standard
feature off 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 the capability to set relative deviations from the actual
value of the selected output signal, the continuous displaying 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 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 to 20 VDC and 200 mADC.
There are two fields on 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 |
|