MI 3290 Earth Analyser
Technical specifications
137
15.6 AC Impedance [Z]
15.6.1 Impedance Meter
Measurement principle: ............................... Voltage (ac) / Current (ac) measurement
AC Impedance Test frequency
Measuring range
Resolution
Uncertainty
Z
55 Hz … 15,0 kHz
0,00
… 19,99
0,01
(3 % of r 2 digits)
20,0
… 199,9
0,1
200
… 999
1
1,000 k
… 1,999 k
0,001 k
2,00 k
… 19,99 k
0,01 k
Test mode ...................................................... single or sweep
Open-terminal test voltage ........................... 20 Vac or 40 Vac
Test frequency ............................................... 55 Hz, 82 Hz, 94 Hz, 105 Hz, 111 Hz, 128 Hz, 164 Hz,
....................................................................... 329 Hz, 659 Hz, 1.31 kHz, 1.50 kHz, 2.63 kHz, 3.29 kHz,
....................................................................... 6.59 kHz, 13.1 kHz, 15.0 kHz
Short-circuit test current ............................... > 220 mA @ 164 Hz, 40 Vac
Limit range (R) .............................................. 1
… 15,0 k
(OFF)
Test voltage shape ......................................... sine wave
Measuring time ............................................. typical 10 s at 164 Hz (depending on test frequency)
Test method .................................................. 4-wire
Rc1 + Rc2. ...................................................... 5 Ω max.
Rp1 + Rp2 ....................................................... 5 Ω max.
Automatic connection test ........................... yes [C1, P1, P2, C2]
Automatic range selection ............................ yes
Automatic test of voltage noise .................... yes
15.7 Current [I]
15.7.1 Iron Clamp Meter RMS
Measurement principle: ............................... Current measurement (RMS)
Current RMS
Measuring range
Resolution
Uncertainty (* See note)
I
1,0 mA … 99,9 mA
0,1 mA
(2 % of r 3 digits)
100 mA … 999 mA
1 mA
1,00 A … 7,99 A
0,01 A
Test mode ...................................................... continuous
Input impedance ........................................... 10
(1/4W max)
Nominal frequency ........................................ 45 Hz … 1,5 kHz
Measuring refresh rate .................................. typical 1 s
Limit range (I) ................................................ 10 mA … 9,00 A (OFF)
Measurement Clamp type ............................ A1018
Automatic range selection ............................ yes
* Note:
Do not measure close to other current-carrying conductors if possible. An external magnetic field
can cause an additional measurement uncertainty.
Clamps
External magnetic field
Additional uncertainty
Iron clamp (A1018)
30 A/m
(15 % of reading)
