Gossen MetraWatt METRAHit 28C light - 11 Characteristic Values

20 GOSSEN METRAWATT GMBH
11 Characteristic Values
1)
Frequencies of over 29 Hz can only be selected at limited intervals.
2)
Shut off when I
max
> 30 mA
Note!
☞
Observe maximum allowable voltage for connection
from external sources to the calibrator output in the
event of a current sink: U
ext
0 … 27 V.
In the event of operating errors, such as the short-
term application of a high interference voltage, the
calibrator is protected by a replaceable fuse F3, this
means that the F3 fuse may be tripped in the event of
an overload > I
max
/U
max
.
Simulator for Temperature Sensors (Resolution: 0.1 K)
* Without internal reference junction
** Relative to fixed reference temperature in °C and thermovoltage of the
thermocouple, for additional error see also table on page 21.
Reference junction, internal: 2 K intrinsic error
Reference junction, external: entry of –30 … 40 °C
Key
s. = setting
d = digit
Real-Time Clock
Accuracy ±1 minute per month
Temperature Influence 50 ppm/K
Reference Conditions
Ambient
Temperature +23 °C ±2K
Relative Humidity 40 ... 60%
Battery Voltage 4.5 V ±0.1 V
Calibration Function
Simulator
Range
Resolution
30000
Digits
(4¾ places)
With Load of Intrinsic Error
Over-
load
Direct Voltage Simulator ±(% of s. + mV) I
max
V
0…±300 mV 0.01 mV 700 Ω 0.05 + 0.02
18 mA
2)
0 … 3 V 0.1 mV 1000 Ω 0.05 + 0.2
0 … 10 V 1 mV 1000 Ω 0.05 + 2
0 … 15 V 1 mV 1000 Ω 0.05 + 2
Pulse / Frequency Generator
Keying ratio (mark-to-space ratio):
50%, amplitude: 10 mV … 15 V
±(% of s. + Hz) I
max
Hz 1 Hz …1 kHz 0,1 …8 Hz
1)
1000 Ω 0,05 + 0,2 18 mA
Current Source Max. Load
Impedance
±(% of s. + µA)
mA
4 … 20 mA
1 µA 20 V 0.05 + 20 … 20 mA
0 … 24 mA
Current Sink
±(% of 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-Type Sensor Sensor Current
[mA]
±(% of s. +
Ω)
I
max
Ω 5…2000 Ω 0.1 Ω 0.05...0.1..4...5 0.05 + 0.2 5 mA
Sensor Type Simulator
Range
in °C
Simulator
Range
in °F
Intrinsic
Error
Over-
load
°C / °F
Resistance Thermometer per IEC 751 ±(% of 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 ±(% of 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 ±(% of s.+K)
**
I
max
K (NiCr/Ni) –250 … +1372 –418…+2501
0.1 + 0.5 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 (CU/Cu10)
–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