Datasheet
METRACAL⏐MC
Multimeter, Calibrator
2 GMC-I Messtechnik GmbH
Read-Out Modes for Encoding and Sink Functions
Calibration signals can be read out either manually (numerically
with key entries), or automatically by means of intervals with
intermediate steps, or as a ramp in a stepless fashion.
The METRACAL MC can thus be used as a precision pulse genera-
tor for dynamic testing.
Depending upon individual needs, desired dynamic response can
be derived from, for example, the full-scale value and the number
of intermediate steps (intervals), or rise and dwell periods (ramp).
This is especially helpful for long-term testing of laboratory and
panel recorders, as well as measuring transducers, and for
“one-man” control rooms.
Numeric Read-Out
Calibration values are set and read out manually with the help of
the instrument’s keypad immediately after the calibration function
has been selected.
Interval
Calibration values are read out continuously in steps between the
minimum and maximum values selected at the device to be
calibrated in this read-out mode. The subsequent step can be
triggered automatically (time per step: 1 sec. … 60 min.) or
manually.
Ramp
Calibration values are read out in a stepless fashion between the
minimum and maximum values selected at the device to be
calibrated in this read-out mode.
Ramp duration for rising and falling ramps, as well as dwell time at
minimum and maximum values, can be set within a range of 1
second to 60 minutes.
Temperature Simulation
The ten most common sensor types are available for the
simulation of thermovoltages. Thermovoltages can be read out
with reference to an internal (socket temperature) or an external
reference junction.
Temperature for the external reference junction can be set at the
calibrator or with a PC. This eliminates the need to connect the
device to be calibrated with the calibrator via the respectively
required compensating lead. A copper conductor between the
calibrator and the device to be calibrated is sufficient in this case.
Applicable Regulations and Standards
Guarantee
3 years material and workmanship
1 year for calibration
Characteristic Values
Calibrator Section
Simulator for Temperature Sensors (resolution: 0.1 K)
1
Without internal reference junction, relative to fixed external reference temperature
and thermovoltage of the thermocouple, internal reference junction: intrinsic error
of 2 K, external reference junction: entry of –30 … 60 °C
Key
S = setting value
IEC 61010-1/
DIN EN 61010-1/
VDE 0411-1
Safety requirements for electrical equipment for
measurement, control and laboratory use
EN 60529
VDE 0470, part 1
Test instruments and test procedures –
degrees of protection provided by enclosures (IP code)
DIN EN 61326-1
VDE 0843-20-1
Electrical equipment for measurement, control and
laboratory use – EMC requirements –
Part 1: General requirements
Calibration
Function
Simulation
Range
Resolution:
30,000
Digits
(4¾ places)
Intrinsic
Uncertainty
Overload
Direct Voltage Source Minimum Load
Resistance
±(% S + mV) I
max
V
0…±60 mV 1 μV
1 kΩ
0.1 + 0.01
18 mA
0…±300 mV 0.01 mV 0.05 + 0.02
0 … 3 V 0.1 mV 0.05 + 0.2
0 …10 V 1 mV 0.05 + 2
0 …15 V 1 mV 0.05 + 2
Pulse / Frequency Generator
Duty cycle (pulse-no-pulse ratio):
50%, amplitude: 10 mV… 15 V
Minimum Load
Resistance
±(% S + Hz) I
max
Hz 1 Hz ...2 kHz 0.1 …1 Hz 1 kΩ 0.05 + 0.2 18 mA
Current Source Max. load ±(% S + μA)
mA
4 … 20 mA
1 μA 16 V 0.05 + 20 … 20 mA
0 … 24 mA
Current Sink ±(% S + μA) U
max
mA
4 … 20 mA
1 μAV
in
= 4 ... 27 V 0.05 + 2 27 V0 … 20 mA
0 … 24 mA
Resistance Simulation Sensor Current
[mA]
±(% S + Ω)I
max
ς
5…2000 Ω 0.1 Ω 0.05...0.1..4...5 0.05 + 0.2 5 mA
Sensor Type Simulation
Range
in °C
Simulation
Range
in °F
Intrinsic
Uncertainty
Over-
load
°C / °F
Resistance Thermometer per IEC 751 ±(% S + K) I
max
Pt100 –200 …+850 –328…+1562 0.1 + 0.5
5 mA
Pt1000 –200 …+300 –328 …+572 0.1 + 0.2
Resistance Thermometer per DIN 43760 ±(% S + K) I
max
Ni100 –60 …+180 –76 …+356 0.1 + 0.5
5 mA
Ni1000 –60 …+180 –76 …+356 0.1 + 0.2
RTD sensor current 0.05 ... 0.1 ... 4
... 5 mA
Thermocouples per DIN and IEC 584-1
ΔU in mV
1
I
max
K (NiCr/Ni) –250…+1372 –418…+2501
±(0.05%
r |Setting|
+
0.02)
18 mA
J (Fe/CuNi) –210…+1200 –346…+2192
T (Cu/CuNi) –270…+400 –454…+ 752
B (Pt30Rh/Pt6Rh) +500...+1820 +932…+3308
E (NiCr/CuNi) –270…+1000 –454…+1832
R (Pt13Rh/Pt) –50…+1768 –58…+3214
N (NiCrSi-NiSi) –270…+1300 –454…+2372
S (Pt10Rh/Pt) –50…+1768 –58…+3214
J (Fe/CuNi) –200…+900 –328…+1652
U (Cu/CuNi) –200…+600 –328…+1112