MI 3290 Earth Analyser
Technical specifications
130
15.1.5 HF Earth Resistance (25 kHz)
Measurement principle ................................. Current / Voltage measurement
Earth Resistance
Measuring range
Resolution
Uncertainty
Re
0,0
… 19,9
0,1
(3 % of r 2 digits)
20
… 299
1
Test mode ...................................................... single
Open-terminal test voltage ........................... 40 Vac
Test voltage frequency .................................. 25 kHz
Short-circuit test current ............................... > 40 mA
Limit range (Re) ............................................ 1
… 100
(OFF)
Test voltage shape ......................................... sine wave
Re definition .................................................. Impedance excluding the reactance value
Measuring time ............................................. typical 10 s
Automatic test of probe resistance ............... yes
Automatic connection test ........................... yes [H, S, E]
Automatic range selection ............................ yes
Automatic test of voltage noise .................... yes
Automatic compensation of
inductive component .................................... yes
Guard terminal .............................................. yes
Typical output current ie vs Auxiliary earth probe resistance Rc
HF Earth Resistance (25 kHz)
0
10
20
30
40
50
1
10
100
1000
10000
Rc [Ω]
ie
[
m
A
]
