METREL MI 3290 - Page 83

MI 3290 Earth Analyser Tests and Measurements
83
Notes:
 Consider displayed warnings when starting the measurement!
 High noise currents and voltages in earth could influence the measurement results. The
tester displays the “noise” warning in this case.
Notes (Probes):
 High impedance of S and H probes could influence the measurement results. In this
case, “Rp” and “Rc” warnings are displayed. There is no pass / fail indication in this
case.
 Probes must be placed at a sufficient distance from the measured object.
Note to SER/PAR Model parameter (Example):
 Series – Activates the series equivalent circuit model. Re value is derivate based on the
series model. Test objects description and schematics wiring diagram:
Test Object
Re
Lo
Rc
Rp
10 
100 µH
200 
200 
Test
Results
Re
Ze
Rc
Rp
Ie
ϕ
Series
model
10,6 
18,95 
201 
201 
49,7 mA
56°
Re
Lo
Rp
Rc
H
S
E
Series model
 Parallel – Activates the parallel equivalent circuit model. Re value is derivate based on the
parallel model. Test objects description and schematics wiring diagram:
Test Object
Re
Lo
Ro
Rc
Rp
10 
100 µH
1 
200 
200 
Test
Results
Re
Ze
Rc
Rp
Ie
ϕ
Parallel
model
9,8 
8,20 
201 
201 
50,1 mA
33°
Re
Lo
Ro
Rp
Rc
H
S
E
Parallel model