Gossen MetraWatt PROFITEST MBASE MTECH - Measuring with Probe

28 GMC-I Messtechnik GmbH
10.1 Measuring with Probe
Earth Resistance Measurement with Probe (Mains Powered) – Connection Circuit Diagram
Key
R
B
Operational earth
R
E
Earth resistance
R
X
Earth resistance via equipotential bonding systems
R
S
Probe resistance
PAS Equipotential bonding strip
RE Overall earth resistance (R
E1
//R
E2
//water pipe)
Measurement R
E
Select the Measuring Function
Connection
Connected components: 2-pole adapter and probe
Set parameters
q Measuring range: AUTO,
10 k (4 mA), 1 k (40 mA), 100  (0,4 A), 10  (> 0.65 A)
In systems with RCCBs, resistance and/or test current must
be chosen such that they are below the tripping current
(½ I
N
).
q Connection type: 2 pole adapter + probe
q Contact voltage: UL < 25 V, < 50 V, < 65 V, freely adjustable
voltage, see section 5.7
q Transformer ratio: without significance in this case
Start Measurement
Note
The following diagram appears if the
2-pole adapter is connected
incorrectly.
P
R
O
F
I
T
E
S
T
w
a
t
e
r
p
i
p
e
SE
2
E
1
B
R
E1
U
Probe
I
----------------=


R
E
Limit value:
R
E
< limit value
U
L
 R
L