7
MAIN UNIT
2
INPUTS/RANGES
2
INPUTS/RANGES
NOTE !
To get good results it is of utmost importance that all signals to be
measured are connected correctly.
Experience tells us that 95% of all problems (like noise, electrical
interference, measurement errors etc.) are the result of incorrect
connections and wiring.
A careful study of sections 2 and 3 is therefore highly recommended.
All analog inputs are differential and have no internal connection to signal
ground. The impedance between the positive and negative inputs to ground is
of the order of several megohms. They must therefore never be allowed to float
outside the specified common mode range, but must be referenced to ground in
some way.
The inputs are also balanced making them very unsusceptible to electrical
noise. Sensor wiring can be very long if a pair of twisted wires is used and the
ground reference is connected to the lowest potential of the signal source via a
separate wire.
