Datasheet

METRAHIT27M, 27I and H+E CAR
Milliohm Resistance Meter and Digital Multimeter,
Insulation Tester and Data Logger
4 GMC-I Messtechnik GmbH
Influencing Quantities and Influence Error
)
With zero balancing
1
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
wave shape Sinusoidal, deviation between RMS and
rectified value < 0.1%
Storage battery voltage 3.6 V0.2 V
Response Time (after manual range selection)
* Without parallel connected capacitance
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, 30999 steps
Overflow display “OL” appears
Polarity display “–” sign is displayed if plus pole
is connected to 
LCD Test All display segments available during
operation of the METRA HIT 27 are
activated after the instrument is switched
on.
Background
illumination METRA HIT 27I only
Power Supply
Storage batteries 3 ea. 1.2 V/2100 mAh NiMH (AA size)
Service life with 2100 mAh NiMH storage battery set
Additional consumption for:
Interface operation: 0.5 mA
LCD illumination: 25 mA at 3.6 V. If voltage drops below
2.7 V, the instrument is switched off
automatically.
Storage battery test
is displayed automatically if storage battery
voltage drops to below approx. 3.3 V
Storage battery charging with NA HIT 2x (Z218H) mains power battery
charger
(2100 mAh storage battery set:
recharging time 20 hours)
or
with external NiMH quick charger Z206D:
recharging time approx. 2 hours
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
1
 (... % rdg. + d)
Frequency
V
AC
> 20 Hz ... 45 Hz
3V
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 error
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
V DC, V AC 1.5 s 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
Measuring Function Current [mA]
/ 3.6 V
Operating Hours
[h]
V, Hz, , , C70 30
m@ 1A 700 3
m@ 200mA 260 8
m@ 20mA 85 24
M  @ ... V / 1 M  100 21
Standby (MEM + clock) 0.15 approx. 1 year