Operating manual EMGZ308
13
7.5 Calibrating the measuring amplifier
Proceed the calibration for each channel as follows:
•
Connect gauge to the tension or current output.
•
Connect the first force sensor.
•
Check if a positive output signal is appearing when loading the sensor in measuring
direction. If not, exchange the two signal wires of the referring force sensor in the
terminal block (
+Signal
and
–Signal
).
•
If used, connect the second force sensor.
•
Check if a positive output signal is appearing when loading the sensor in measuring
direction. If not, exchange the two
signal wires of the referring force
sensor in the terminal block (
+Signal
and
–Signal
).
•
Insert material or a rope loosely to the
machine.
•
Adjust the offset trimmer until the
output value is zero.
•
Load material or rope with a defined
weight (fig. 11).
•
Adjust the gain trimmer until the
output value shows the needed value
(i.e. 10V corresponding to 500N).
Notice
If the measuring amplifier is operated with fixed gain and offset, signal conditioning has
to be done with additional equipment (for ex. PLC).
7.6 Scaling the integrated display
After configuring offset and gain, scale the
value shown in the display of the respective
channel as follows:
•
Scale the display value with trimmer
„scale display“ (fig. 12).
•
Set the jumper „set decimal point“
(fig. 12) in the position which gives a
correct decimal point in the display.
•
Close the housing.
fig. 11: Calibrating the measuring amplifier
fig. 12: Display setting elements
E308011e
