6. Operation
Projekt Elektronik
MESS - UND REGELUNGSTECHNIK GMBH
Page 72
6.5.2
Structure
Figure 59 Structure AS-probe adapter
The AS-probe adapter basically consists of two components, the voltage
converter and the amplifier.
The voltage converter has a wide input range which allows to supply the
adapter with any constant voltage between 9 V and 36 V. The voltage
converter also generates a galvanic isolation form the supply voltage. The
potential difference between primary and secondary side is limited to 130 V
by a varistor. Therefore the potential difference during operation should not
exceed 100 V.
The voltage converter generates high stable ±3 V necessary to supply the
AS-active-probes. Furthermore it provides the voltage to supply the rest of
the circuit.
The amplifier boosts the probe signal from ±2 V to ±10 V (gain x5). With a
switch an again ten times higher amplification (x50) can be selected. In this
setting ±0.2 V are converted to ±10 V.