11 Maintenance and servicing
SCHMIDT
®
PressControl 3000 – V1.3
52
Figure 11-2: Amplifier board
1
Potentiometer for the force offset
2
Potentiometer for the amplification
If you turn the screw on the potentiometer, but the value in the “Offset force”
does not change:
Switch the control unit off.
Switch the control unit on again.
Try again to set the force offset.
11.2 Calibrating the force sensor
Since the force measuring system is usually used for measuring quality-
relevant specifications, it should be inspected and, if necessary, calibrated at
reasonable intervals established by the user. As specified by the DIN EN
ISO 9000, a calibration of the system must be carried out at regular
intervals.
The calibration is also offered by SCHMIDT Technology as part of its
customer service.
A reference measuring system is needed for the calibrating of the force
measuring system. A calibration value is calculated using the measured
value of the reference measuring system and the measured value of the
machine.
SCHMIDT Technology optionally offers the SCHMIDT
®
LoadCheck
reference measuring system for the calibration of your system.
Select the "Data Output" system function key.
Press the "Data Output" system function key again to display the "Data
Output 2".
Place the force sensor of the reference measuring system beneath the
ram.
Subject the force sensor to the nominal pressing force.
Read the reference measured value on the display module (display in
kN) and the measured value of the press system.
1
2
Prerequisite
Preparing press system
Recording
measured values