Atec Zimmer-Electronic-Systems-LMG95 - Manual (Page 4)

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Technical data
Voltage measuring ranges
Rated Range value /V
6 12.5 25 60 130 250 400 600 Also available with ranges:
Permissible trms value /V 7.2 14.4 30 60 130 270 560 720 25mV...3mV,
Permissible peak value 12.5 25 50 100 200 400 800 1600 100mV...12V
for full scale /V 400mV...60V
Overload capability 1500V for 1s 12V...650V (3200V pk )
Input resistance 1M Ω, 20pF
Current measuring ranges
Rated range value /A
0.15 0.3 0.6 1.2 2.5 5 10 20 120 240 480 960 Also available with ranges:
Permissible trms value /A 0.3 0.6 1.3 2.6 5.2 10 21 21 21 21 21 21 0.6mA...80mA
Permissible peak value 0.469 0.938 1.875 3.75 7.5 15 30 60 120 240 480 960 10mA...1200mA
for full scale /A 40mA...5A
Overload capability 160A for 1s
Input resistance 5m Ω
Voltage inputs for current measuring
with shunt / transducer
Rated range value /V
0.03 0.06 0.12 0.25 0.5 1 2 4
Permissible trms value /V 0.06 0.13 0.27 0.54 1 2 4 8
Permissible peak value 0.0977 0.1953 0.3906 0.7813 1.563 3.125 6.25 12.5
for full scale /V
Overload capability
250V for 1s
Input resistance 100k Ω
Measuring range selection Auto, manual or remote controlled
Isolation Current and voltage path are isolated against each other and may float against earth with 600V. Testing voltage 3250V
Measuring method Simultaneous sampling of the current and voltage inputs and A/D conversion of the instantaneous values (100kHz).
Memory for up to 2.10
6 sampling values.
Measuring cycle, synchronization, For measurements of the trms values for current, voltage and active power the measuring cycle time is adjustable in the range
averaging of 50ms to 60s. The synchronization can be performed on the measuring signal, the fundamental harmonic, the envelope, the
mains or an external signal. Single measurings with stop after one or more cycles are possible, averaging over 1 to 16 cycles.
Measuring accuracy (Standard version)
g n ir u s a e M
y c a r u c c A
) e g n a r g n ir u s a e m % + e u l a v g n ir u s a e m f o % ( ±
C D z H 5 1 .. . 5 0 . 0 z H 5 4 .. . 5 1 z H 5 6 .. . 5 4 z H k 1 .. . z H 5 6 z H k 3 .. . 1 z H k 5 1 .. . 3 z H k 0 5 .. . 5 1
e g a tl o V 6 0 . 0 + 2 0 . 0 4 0 . 0 + 2 0 . 0 3 0 . 0 + 5 1 0 . 0 2 0 . 0 + 1 0 . 0 3 0 . 0 + 5 1 0 . 0 6 0 . 0 + 3 0 . 0 2 . 0 + 1 . 0 0 . 1 + 5 . 0
t n e rr u C 6 0 . 0 + 2 0 . 0 4 0 . 0 + 2 0 . 0 3 0 . 0 + 5 1 0 . 0 2 0 . 0 + 1 0 . 0 3 0 . 0 + 5 1 0 . 0 6 0 . 0 + 3 0 . 0 2 . 0 + 1 . 0 0 . 1 + 5 . 0
e g a tl o V t n u h S
t u p n I
6 0 . 0 + 2 0 . 0 4 0 . 0 + 2 0 . 0 3 0 . 0 + 5 1 0 . 0 2 0 . 0 + 1 0 . 0 3 0 . 0 + 5 1 0 . 0 6 0 . 0 + 3 0 . 0 2 . 0 + 1 . 0 0 . 1 + 5 . 0
r e w o P e v it c A 6 0 . 0 + 3 0 . 0 4 0 . 0 + 5 3 0 . 0 3 0 . 0 + 5 2 0 . 0 2 0 . 0 + 5 1 0 . 0 3 0 . 0 + 5 2 0 . 0 6 0 . 0 + 5 0 . 0 2 . 0 + 2 . 0 0 . 1 + 0 . 1
Graphical display
Real-time visualisation, 4 or 8 measured values, measured signals in the time and frequency domain:
• You see the signals which you measure • You can estimate whether the measurement is running correctly • You discover new
things depending on current, voltage and power • You better understand the dependencies of the components in the circuit
Core losses at small cos
ϕϕϕϕϕ and high frequencies
(with optional 500kHz precision band
width and delay compensation to 4ns)
The magnetising current I flowing in the primary winding is fed into the current input of the LMG95, and the induced voltage at
the open secondary winding is fed into the voltage input. In this way, only the core losses (magnetising losses) are measured,
and not the copper losses. The half-wave rectified voltage value, also measured with the LMG95, is a measure of the voltage
time area, and therewith for the induced flux. With the formula editor, the values for a B-H characteristic curve can be calcu-
lated from the measured electrical values and the geometrical data of the core.
Device settings
Up to 8 device settings can be stored with name, datas of the test sample, etc.,
with “Save” and called up again with “Recll”.
A high level of user convenience if measurements should be made alternatively on
different samples.