Instructions
86 GMC-I Messtechnik GmbH
19 Characteristic Values
Characteristic Values MBASE+ and MTECH+  
Func-
tion
Measured 
Quantity
Display Range
Reso-
lution
Input 
Impedance/
Test Cu rren t
Measuring Range Nominal Values
Measuring 
Uncertainty
Intrinsic 
Uncertainty
Connections
Plug 
Insert
1
2-Pole
Adapter
3-Pole 
Adapter
Probe
Clamps
WZ12C Z3512A
MFLEX
P300
U
U
L-PE
U
N-PE
0 ... 99.9 V 0.1 V
5 MΩ
0.3 ... 600 V 
1)
U
N
 = 120/230/
400/500 V
f
N
 = 16
2
/
3
/50/
60/200/400 Hz
±(2% rdg.+5d) ±(1% rdg.+5d)
●●●
100 ... 600 V 1 V ±(2% rdg.+1d) ±(1% rdg.+1d)
f
15.0 ... 99.9 Hz
100 ... 999 Hz
0.1 Hz
1 Hz
DC 15,4 ... 420 Hz ±(0.2% rdg.+1d) ±(0.1% rdg.+1d)
U
3~
0 ... 99.9 V
100 ... 600 V
0.1 V
1 V
0.3 ... 600 V
±(3% rdg.+5d)
±(3% rdg.+1d)
±(2% rdg.+5d)
±(2% rdg.+1d)
●
U
PROBE
0 ... 99.9 V
100 ... 600 V
0.1 V
1 V
1.0 ... 600 V
±(2% rdg.+5d)
±(2% rdg.+1d)
±(1% rdg.+5d)
±(1% rdg.+1d)
●
U
L-N
0 ... 99.9 V
100 ... 600 V
0.1 V
1 V
1.0 ... 600 V 
1
±(3% rdg.+5d)
±(3% rdg.+1d)
±(2% rdg.+5d)
±(2% rdg.+1d)
●●
I
ΔN
I
F
U
IΔN
0 ... 70.0 V 0.1 V 0.3 · I
ΔN
5 ... 70 V
U
N
 = 
120 V
230 V 
400 V 
2
f
N
 = 50/60 Hz
U
L
 = 25/50 V
I
ΔN
 = 
6 mA
10 mA
30 mA
100 mA
300 mA
500 mA 
2
+10% rdg.+1d
+1% rdg.–1d ... 
+9% rdg.+1d
●●
●
optio
nal
R
E
10 Ω ... 999 Ω
1.00 k
Ω
 ... 6.51 k
Ω
1 Ω
0.01 kΩ
I
Δ
N
 = 10 mA · 1,05
calculated value 
from
U
IΔN
 /
I
ΔN
3 Ω ... 999 Ω
1 kΩ ... 2.17 kΩ
1 Ω
0.01 kΩ
I
Δ
N
 = 30 mA · 1,05
1Ω ... 651 Ω 1Ω
I
Δ
N
=100 mA · 1,05
0.3 Ω ... 99.9 Ω
100 Ω ... 217 Ω
0.1 Ω
1 Ω
I
Δ
N
=300 mA · 1,05
0.2 Ω ... 9.9 Ω
10 Ω ... 130 Ω
0.1 Ω
1 Ω
I
Δ
N
=500 mA · 1,05
I
F
 (I
ΔN
 = 6 mA) 1.8 ... 7.8 mA
0,1 mA
1.8 ... 7.8 mA 1.8 ... 7.8 mA
±(5% rdg.+1d) ±(3.5% rdg.+2d)
I
F
 (I
ΔN
 = 10 mA) 3.0 ... 13.0 mA 3.0 ... 13.0 mA 3.0 ... 13.0 mA
I
F
 (I
ΔN
 = 30 mA) 9.0 ... 39.0 mA 9.0 ... 39.0 mA 9.0 ... 39.0 mA
I
F
 (I
ΔN
 = 100 mA) 30 ... 130 mA 1 mA 30 ... 130 mA 30 ... 130 mA
I
F
 (I
ΔN
 = 300 mA) 90 ... 390 mA 1 mA 90 ... 390 mA 90 ... 390 mA
I
F
 (I
ΔN
 = 500 mA) 150 ... 650 mA 1 mA 150 ... 650 mA 150 ... 650 mA
U
IΔ
 / U
L
 = 25 V 0 ... 25.0 V
0.1 V wie I
Δ
0 ... 25.0 V
+10% rdg.+1d
+1% rdg.–1d ...
+9% rdg.+1 d
U
IΔ
 / U
L
 = 50 V 0 ... 50.0 V 0 ... 50.0 V
t
A
 (I
ΔN
 · 1) 0 ... 1000 ms 1 ms 6 ... 500 mA 0 ... 1000 ms
±4 ms ±3 mst
A
 (I
ΔN
 · 2) 0 ... 1000 ms
2 · 6 ... 2 · 500 mA
0 ... 1000 ms
t
A
 (I
ΔN
 · 5) 0 ... 40 ms 1 ms
5 · 6 ... 5 · 300 mA
0 ... 40 ms
Z
L-PE
Z
L-N
Z
L-PE 
()
Z
L-N
0 ... 999 mΩ
1.00 ... 9.99 Ω
1 mΩ
0.01 Ω
0.1 Ω
1.3 ... 3.7 A AC
0.5/1.25 A DC
0.15 ... 0.49 Ω
0.50 ... 0.99 Ω
1.00 ... 9.99 Ω
U
N 
= 120/230 V
400/500 V
1
f
N
=16
2
/
3
8
/50/60Hz
±(10% rdg.+ 30d)
±(10% rdg.+ 30d)
±(5% rdg.+ 3d)
±(5% rdg.+30d)
±(4% rdg.+30d)
±(3% rdg.+3d)
●
●
Z
L-PE
Z
L-PE 
+ DC
0 ... 999 mΩ
1.00 ... 9.99 Ω
10.0 ... 29.9 Ω
0.25 ... 0.99 Ω
1.00 ... 9.99 Ω
U
N 
= 120/230 V
f
N
 = 50/60 Hz
±(18% rdg.+30d)
±(10% rdg.+3d)
±(6% rdg.+50d)
±(4% rdg.+3d)
I
K
 (Z
L-PE
 , 
Z
L-PE
 + DC)
0 ... 9.9 A
10 ... 999 A
1.00 ... 9.99 kA
10.0 ... 50.0 kA
0,1 A
1 A
10 A
100 A
120 (108 ... 132) V
230 (196 ... 253) V
400 (340 ... 440) V
500 (450 ... 550) V
calculated value from Z
L-PE
Z
L-PE 
(15 mA)
0.6 ... 9.9 Ω 0.1 Ω only display range
10.0 ... 99.9 Ω
100 ... 999 Ω
0.1 Ω
1 Ω
15 mA AC
10.0 ... 99.9 Ω
100 ... 999 Ω
U
N 
= 120/230 V
f
N
 = 
16
2
/
3
8
/
50/
60
 Hz
±
(10% rdg.+10D)
±
(8% rdg.+2D)
±
(2% rdg.+2D)
±
(1% rdg.+1D)
I
K
 (15 mA)
100 ... 999 mA
0.00 ... 9.99 A
10.0 ... 99.9 A
1 mA
0.01 A
0.1 A
calcul. value depends 
on U
N
 and Z
L-PE
:
I
K
=U
N
/10...1000Ω
calculated value from Z
L-PE 
(15 mA):
I
K
 = U
N
/Z
L-PE 
(15 mA)
R
E
R
E
 (with probe)
[R
E 
(without probe) 
values as Z
L-PE
]
0 ... 999 mΩ
1.00 ... 9.99 Ω
10.0 ... 99.9 Ω
100 ... 999 Ω
1 kΩ ... 9.99 kΩ
1 mΩ
0,01 Ω
0,1 Ω
1 Ω
0.01 kΩ
1.3 ... 3.7 A AC
1.3 ... 3.7 A AC
1.3 ... 3.7 A AC
400 mA AC
40 mA AC
4 mA AC
0.15 Ω ... 0.49 Ω
0.50 Ω ... 0.99 Ω
1.0 Ω ...9.99 Ω
10 Ω ...99.9 Ω
100 Ω ...999 Ω
1 kΩ ...9.99 kΩ
U
N 
= 120/230 V
U
N 
= 400 V 
1
f
N
 = 50/60 Hz
±(10% rdg.+30d)
±(10% rdg.+30d)
±(5% rdg.+3d)
±(10% rdg.+3d)
±(10% rdg.+3d)
±(10% rdg.+3d)
±(5% rdg.+30d)
±(4% rdg.+30d)
±(3% rdg.+3d)
±(3% rdg.+3d)
±(3% rdg.+3d)
±(3% rdg.+3d)
●● ●
R
E
 DC+
0 ... 999 mΩ
1.00 ... 9.99 Ω
10.0 ... 29.9 Ω
1 mΩ
0.01 Ω
0.1 Ω
1.3 ... 3.7 A AC
0.5/1.25 A DC
0.25 ... 0.99 Ω
1.00 ... 9.99 Ω
U
N 
= 120/230 V
f
N
 = 50/60 Hz
±
(18% rdg.+ 30d)
±(10% rdg. + 3d)
±(6% rdg.+50D)
±(4% rdg.+3D)
U
E
0 ... 253 V 1 V — calculated value
R
E
 Sel
clip
R
E
  0 ... 999 Ω
1 mΩ ... 
1 Ω
1.3 ... 3.7 A AC
0.5/1.25 A DC
0.25 ... 300 Ω 
5)
see R
E
±
(20% rdg.+ 20 d)
±
(15% rgd.+ 20 d)
●
●
R
E
 DC+ 0 ... 999 Ω
1 mΩ ... 
1 Ω
U
N 
= 120/230 V
f
N
 = 50/60 Hz
±
(22% rdg.+20 d)
±
(15% rdg.+ 20 d)
EX-
TRA
Z
ST
0 ... 30 MΩ 1 kΩ 2.3 mA at 230 V
10 kΩ ... 199 kΩ
200 kΩ ... 30 MΩ
U
0
 = U
L-N
±(20% rdg.+2d)
±(10% rdg.+2d)
±(10% rdg.+3d)
±(5% rdg.+3d)
●●●●










