MMR-650 – USER MANUAL
63
10 Annexes
10.1 Technical specifications
⇒
Abbreviation "m.v." used in the specification of measurement uncertainty means a standard meas-
ured value.
Uncertainty values stated in the table refer to the measurement with bidirectional current and relate
to the average of two measurements according to the following formula:
2
R
F
R
R
R
+
=
, where R
F
– resistance at the assumed "forward" current direction and R
R
– re-
sistance at the assumed "backward" current direction. For measuring with unidirectional current, the
specified accuracy is not guaranteed.
Resistance measurements of inductive and resistive objects
Range
Resolution
Basic uncertainty *
Measuring current /
voltage **
0
µΩ
…999.9
µΩ
0.1
µΩ
±(0.25% m.v. + 2 digits)
10 A (20 mV)
1.0000 m
Ω
…1.9999 m
Ω
0.0001 m
Ω
2.000 m
Ω
…19.999 m
Ω
0.001 m
Ω
10 A (200 mV)
20.00 m
Ω
..199.99 m
Ω
0.01 m
Ω
10 A / 1 A (2 V / 200 mV)
200.0 m
Ω
…999.9 m
Ω
0.1 m
Ω
1 A / 0.1 A (2 V / 200 mV)
1.0000
Ω
…1.9999
Ω
0.0001
Ω
2.000
Ω
…19.999
Ω
0.001
Ω
0,1 A (2 V)
20.00
Ω
…199.99
Ω
0.01
Ω
10 mA (2 V)
200.0
Ω
…1999.9
Ω
0.1
Ω
1 mA (2 V)
* - for measurements on inductive objects in fast mode: ±(2% m.v. + 2 digits)
** - applies to measurements on resistance objects, for measurements on inductive objects output
voltage
≤
10 V
Resistance measurement in the presence of noise of 50 Hz or 60 Hz
-
signal/noise ratio
Additional
uncertainty
Signalling
N
≥
0.02
-
-
0.02 > N
≥
0.004
1%
N < 0.004
unspecified
+
Other technical specifications:
a) insulation type .................................................................... double, according to EN 61010-1:2011
b) measurement category ........................................................ III 600 V acc. to EN 61010-2-030:2011
CAUTION!
With the use of 10m or 25m measurement leads with the crocodile - CAT III 50V.
c) ingress protection acc. to EN 60529 ...................................................... with closed housing – IP67
with open housing, powered from the battery pack, installed plugs – IP54
with open housing, powered from mains and/or without plugs – IP40
d) protection against external voltage ............................................................... up to 600 Vac for 10 s
e) power supply .................................................................... Li-Ion rechargeable battery 7.2 V 8.8 Ah
f) power supply to battery charger ........................................................ 90 V..265 V/50 Hz..60 Hz, 2 A
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