MI 3290 Earth Analyser
Technical specifications
132
15.2
Specific Earth Resistance Measurements [ρ]
15.2.1 Wenner and Schlumberger method
Measurement principle ................................. Voltage / Current measurement
Specific Earth
Measuring range
Resolution
Uncertainty
ρ
0,00
m … 19,99
m
0,01
m
calculated value (consider
uncertainty of 4 – pole
measurement)
20,0
m … 199,9
m
0,1
m
200
m … 999
m
1
m
1,000 k
m … 1,999 k
m
0,001 k
m
2,00 k
m … 19,99 k
m
0,01 k
m
20,0 k
m … 199,9 k
m
0,1 k
m
200 k
m … 999 k
m
1 k
m
1,0 M
m … 1,99 M
m
10 k
m
Specific Earth
Measuring range
Resolution
Uncertainty
ρ
0,00
ft … 19,99
ft
0,01
ft
calculated value (consider
uncertainty of 4 – pole
measurement)
20,0
ft … 199,9
ft
0,1
ft
200
ft … 999
ft
1
ft
1,000 k
ft … 1,999 k
ft
0,001 k
ft
2,00 k
ft … 19,99 k
ft
0,01 k
ft
20,0 k
ft … 199,9 k
ft
0,1 k
ft
200 k
ft … 999 k
ft
1 k
ft
1,0 M
ft … 1,99 M
ft
10 k
ft
Test mode ...................................................... single
Open-terminal test voltage ........................... 20 Vac or 40 Vac
Test frequency ............................................... 164 Hz
Short-circuit test current ............................... > 220 mA @ 164 Hz, 40 Vac
Limit range (ρ) .............................................. 0,1
m … 900 k
m (OFF)
Limit range (ρ) .............................................. 1
ft … 900 k
ft (OFF)
Test voltage shape ......................................... sine wave
Measuring time ............................................. see Table 15.2
Automatic test of probe resistance ............... yes
Automatic connection test ........................... yes [H, S, ES, E]
Automatic range selection ............................ yes
Automatic test of voltage noise .................... yes
Typical open-terminal test voltage vs Frequency
15
20
25
30
35
40
45
10
100
1000
10000
100000
f [Hz]
U
h
[
V
]
Test voltage 40 V
Test voltage 20 V
