User Manual

GMC-I Messtechnik GmbH 23
Influencing Quantities and Influence Error
1)
With zero balancing
2)
Specified error valid as of display values of 10% of the measuring range
1)
With zero balancing
Real-Time Clock
Accuracy 1 minute per month
Temperature Influence 50 ppm/K
Reference Conditions
Ambient
temperature +23C 2K
Relative humidity, 40 ... 60%
Measured quantity
frequency 45 ... 65 Hz
Measured quantity
waveshape Sinusoidal, deviation between RMS
and rectified value < 0.1%
Storage battery voltage 3.6 V0.2 V
Response Time
Response Time (after manual range selection)
* without parallel capacity
Display
LCD panel (65 mm x 30 mm) with display of up to 3
measured values, unit of measure, type of current and
various special functions.
Display / Char. Height 7-segment characters
Main display: 12 mm
Auxiliary displays: 7 mm
Number of places 4¾ places 309 99 steps
Overflow display „0. L“ appears
Polarity display “–” sign is displayed if plus pole
is connected to “”
LCD test All display segments available
during operation of the METRA
HIT27 are activated after the
instrument is switched on.
Background illumination METRA HIT 27I only
Influencing
Quantity
Sphere of
Influence
Measured Quantity /
Measuring Range
1)
Influence Error
 (... % rdg. + d)/10 K
Temperature
0  +21 C
and
+25
+40 C
V DC 0.1 + 5
V AC 0.5 + 5
m@ 1 A 4L 1 + 5
m@ 200 mA 4L 1 + 5
300  300 k 2L 0.2 + 5
3M2L 0.5 + 5
30 M2L 1 + 5
Insulation 30 M   3 G  2 + 5
Hz 0.1 + 5
C (RTD) 0.5 + 10
Influencing
Quantity
Frequency
Measured
Quantity /
Measuring
Range
Influence Error
2)
 (... % rdg. + d)
Frequency
V
AC
> 20 Hz ... 45 Hz
3V
up to
600.0 V
2 + 10
> 65 Hz ... 1 kHz
Influencing
Quantity
Sphere of
Influence
Measured Quantity /
Measuring Range
1)
Influence Error
Relative
humidity
75%
3 days
instrument off
All measured
quantities
1 x intrinsic
uncertainty
Influencing
Quantity
Sphere of Influence
Measuring
Range
Damping
dB
Common
Mode
Interference
Voltage
Interference quantity max. 600 V ~ V DC > 90 dB
Interference quantity max. 600 V ~
50 Hz, 60 Hz sine
30 V ~ > 80 dB
300 V ~ > 70 dB
600 V ~ > 60 dB
Series Mode
Interference
Voltage
Interference quantity: V,
respective nominal value
of the measuring range,
max. 600 V ~ , 50 Hz, 60 Hz sine
V= > 60dB
Interference quantity max. 600 V DC V ~ > 60 dB
Measured Quantity /
Measuring Range
Response Time
for Digital Display
Measured Quantity
Step Function
VDC, VAC 1.5s
from 0 to 80%
of upper range limit value
m@ 1 A 4L 2 s
from  to 50%
of upper range limit value
m 1.5 s
300  ... 3 M 2s
3G 5s
Continuity < 50 ms
1.5 s
C Pt100 max. 3 s
>10 Hz 1.5 s
from 0 to 50%
of upper range limit value