Operating manual EMGZ307
5
4
System Description
fig. 1: Basic structure of the EMGZ307 Tension Measuring Amplifier
E307001e
4.1
Functional Description
The force sensors measure the tension force in the processed material and transmit the
measuring value as a mV signal to the hybrid module in the measuring amplifier
EMGZ307. The measuring amplifier amplifies the mV signal depending on
configuration. The resulting feedback value can be transmitted to an analog
instrument, a PLC or equivalent devices.
4.2
Force Sensors
The force sensors are based on the flexion beam principle. The flexion is measured by
strain gauges and transmitted to the measuring amplifier as mV signal. Due to the
wheatstone wiring of the strain gauges, the measured value is according also to the
power supply. So, the force sensors are supplied from the EMGZ307 by a very
accurate power supply.
4.3
Measuring Amplifier EMGZ307
The EMGZ307 is a single channel analog Tension Measuring Amplifier based on a
hybrid circuit. It is developed specially for use under hard conditions. It is delivered in
a sealed housing compliant with IP67. There can be connected 1 or 2 force sensors of
350
Ω
. The hybrid module provides the highly accurate 5V power supply and amplifies
the mV signal of the force sensors to a level of 10V and 20mA. Tension and current
output are active the same time. The hybrid technology ensures both good thermal and
electrical characteristics. Measuring circuit and power supply are galvanic insulated.
All settings are done alternatively by 2 trimmers or fixed by jumpers. For filtering of
the signals, non-polarized capacitors can be soldered.
