User Manual
88 GMC-I Messtechnik GmbH
Characteristic Values MPRO, MXTRA & SECULIFE IP
Func-
tion
Measured 
Quantity
Display Range
Reso-
lution
Input 
Impedance /
Test Cu rrent
Measuring 
Range
Nominal 
Values
Measuring 
Uncertainty
Intrinsic 
Uncertainty
Connections
Plug
Insert 
1
2-Pole
Adapter
3-Pole 
Adapter
Probe
Clamp
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 V
230 V
400 V
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. + 1 d) ±(1% rdg. + 1 d)
f
15.0 ... 99.9 Hz
100 ... 999 Hz
0.1 Hz
1 Hz
DC 15.4 ... 420 Hz
±
(0.2% rdg. + 1 d)
±(0.1% rdg. + 1 d)
U
3~
0 ... 99.9 V
100 ... 600 V
0.1 V
1 V
0.3 ... 600 V
±(3% rdg.+5d)
±(3% rdg. + 1 d)
±(2% rdg.+5d)
±(2% rdg. + 1 d)
●
U
Probe
0 ... 99.9 V
100 ... 600 V
0.1 V
1 V
1.0 ... 600 V
±(2% rdg.+5d)
±(2% rdg. + 1 d)
±(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. + 1 d)
±(2% rdg.+5d)
±(2% rdg. + 1 d)
●●
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
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
U
N 
≤ 230 V
+10% rdg. + 1 d
+1% rdg. –1d 
+9% rdg. + 1 d
●●
●
Option
R
E
10 Ω ... 999 Ω
1.00 kΩ ... 6.51 kΩ
1 Ω
0.01 kΩ
I
Δ
N
 = 10 mA · 1.05
calculated value
Off
R
E
 = 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
I
F
 (I
ΔN
 = 10 mA) 3.0 ... 13.0 mA 3.0 ... 13.0 mA 3.0 ... 13.0 mA
±(5% rdg. + 1 d)
±(3.5% rdg. + 2 
d)
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 Same as I
Δ
0 ... 25.0 V
+10% rdg. + 1 d
+1% rdg. –1d 
+9% rdg.+ 1d
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
U
N
≤
 230 V
±4 ms ±3 mst
A
 (I
ΔN
 · 2) 0 ... 1000 ms 1 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
3.7 ... 4.7 A AC
0.10 ... 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
/50/60 Hz
±
(10% rdg.+20d)
±
(10% rdg.+20d)
±(5% rdg.+3d)
±(5% rdg.+
20d
)
±(4% rdg.+
20d
)
±(3% rdg.+3d)
●
●
Z
L-P E
Z
L-PE 
+ DC
0 ... 999 mΩ
1.00 ... 9.99 Ω
10.0 ... 29.9 Ω
3.7 ... 4.7 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)
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
Value calculated from Z
L-PE
Z
L-PE 
(15 mA)
0.6 ... 99.9 Ω
100 ... 999 Ω
0.1 Ω
1 Ω
15 mA AC
10 ...99.0 Ω
100 ... 999Ω
U
N 
= 120/230 V
f
N
 = 16
2
/
3
8
/
50/
60 Hz
±
(10% rdg.+10d)
±
(8% rdg. + 2 d)
±
(2% rdg. + 2 d)
±
(1% rdg. + 1 d)
I
K
 (15 mA)
0.10 ... 9.99 A
10.0 ... 99.9 A
100 ... 999 A 
14)
0.01 A
0.1 A
1 A
100 mA ... 12 A 
(U
N
 = 120 V)
200 mA ... 25 A 
(U
N
 = 230 V)
Value calculated from 
I
K
 = U
N
/Z
L-PE 
(15 mA)
R
E
R
E.sl
 (without 
probe)
R
E 
(with probe)
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
3.7 ... 4.7 A AC
3.7 ... 4.7 A AC
400 mA AC
40 mA AC
4 mA AC
0.10 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
 same as U 
function
1
f
N
 = 50/60 Hz
±
(10% rdg.+20d)
±
(10% rdg.+20d)
±(5% rdg.+3d)
±(10% rdg.+3d)
±(10% rdg.+3d)
±(10% rdg.+3d)
±(5% rdg.+
20d
)
±(4% rdg.+
20d
)
±(3% rdg.+3d)
±(3% rdg.+3d)
±(3% rdg.+3d)
±(3% rdg.+3d)
●● ●
R
E (15 mA) 
(without/with probe)
0.5 ... 99.9 Ω
100 ... 999 Ω
0.1 Ω
1 Ω
15 mA AC
10 Ω ...99.9 Ω
100 Ω ...999 Ω
U
N 
= 120/230 V
f
N
 = 50/60 Hz
±
(10% rdg.+10d)
±
(8% rdg. + 2 d)
±(2% rdg. + 2 d)
±(1% rdg. + 1 d)
R
E.sl
 (without 
probe) + DC
R
E.sl
 (with probe) 
 + DC
0 ... 999 mΩ
1.00 ... 9.99 Ω
10.0 ... 29.9 Ω
1 mΩ
0.01 Ω
0.1 Ω
3.7 ... 4.7 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 3.7 ... 4.7 A AC
R
E
 = 0.10 ... 9.99 
Ω
U
N 
= 120/230 V
f
N
 = 50/60 Hz
Calculated U
E
 = U
N
 · R
E
/R
E.sl
R
E
Sel
Clamp
R
E.sel
(only with probe)
0 ... 999 mΩ
1.00 ... 9.99 Ω
10.0 ... 99.9 Ω
100 ... 999 Ω
1 mΩ
0.01 Ω
0.1 Ω
1
 Ω
2.1 A AC
2.1 A AC
400 mA AC
40 mA AC
0.25 ... 300 Ω 
4
U
N 
= 120/230 V
f
N
 = 50/60 Hz
±
(20% rdg.+20 d)
±
(15% rdg.+20 d)
●
●
R
E.sel 
+ DC 
(only with probe)
0 ... 999 mΩ
1.00 ... 9.99 Ω
10.0 ... 99.9 Ω
100 ... 999 Ω
1 mΩ
0.01 Ω
0.1 Ω
1
 Ω
3.7 ... 4.7 A AC
0.5/1.25 A DC
0.25 ... 300 Ω 
R
E.tot
 < 10 Ω 
4
U
N 
= 120/230 V
f
N
 = 50/60 Hz
±
(22% rdg.+20 d)
±
(15% rdg.+20 d)
EXTRA
Z
ST
10 kΩ ... 199 kΩ
1 kΩ
1 kΩ
0.01 MΩ
0.1 MΩ
2.3 mA bei 230 V
10 kΩ ... 199 kΩ
U
0
 = U
L-N
±(20% v.M.+2D) ±(10% v.M.+3D)
●●●●
200 kΩ ... 999 kΩ
1.00 M
Ω
 ... 9.99 M
Ω
10.0 M
Ω
 ... 30.0 M
Ω
200 kΩ ... 999 kΩ
1.00 M
Ω
 ... 9.99 M
Ω
10.0 M
Ω
 ... 30.0 M
Ω
±(10% v.M.+2D) ±(5% v.M.+3D)
IMD test
20 ... 648 kΩ
2.51 MΩ
1 kΩ
0.01 MΩ
IT line voltage
U.it = 90 ... 550 V
20 kΩ ... 199 kΩ
200 kΩ ... 648 kΩ
2.51 MΩ
IT system nomi-
nal voltages
UN.it =
120/230/400/
500 V
f
N
 = 50/60 Hz
±7%
±12%
±3%
±5%
±10%
±2%
●●










