Avery Berkel CX20 SERIES, Service Manual

Page: 73 / 353

7 — Calibration and Adjustments
7–3 CX20/CX30/CX34 Service Manual
7.1 Introduction
Calibration data is held in the EEPROM. Calibration data contains span, zero
and linearity settings.
During calibration the weight display is active and subdivision data displayed in
the alphanumeric display.
NOTE: If the capacity of a machine is changed the machine must be
re–calibrated.
7.2 Adjustment of Overload Stops (CX20/CX30)
There is no adjustment necessary to the central overload stop, which is located
directly underneath the transducer and the centre of the cross, as this is factory
set.
7.2.1 Adjustment of Asymmetric Overload Stops
To adjust the asymmetric overload stops, proceed as follows:
1 Switch off machine and isolate it from the mains power supply.
2 Remove weighplate and case as detailed in Section 3. Then fit
weighplate back on cross.
3 Apply full load (varies according to scale) plus 0,5 kg (1 lb) to one
corner of weigh plate.
4 Adjust asymmetric overload stop below loaded corner so that head of
stop just contacts underside of weighplate. Lock overload stop in
position by tightening lock nut.
5 Repeat Steps 3 and 4 at three other corner positions.
6 Remove weighplate and reassemble machine (refer to Section 3).
7.3 Adjustment of Overload Stops (CX9/A702)
There is no adjustment necessary to the central overload stop, which is located
directly underneath the transducer and the centre of the cross, as this is factory
set.
7.4 Adjustment of Overload Stops (CX34)
There is no adjustment necessary to the overload stops above and below the
transducer, as they are factory set.