Manual Calibration Of Scale [769|780|799|869|899]; Linear Calibration - Seca 334 LC Service Manual

Calibration of Scales
Manual calibration of scale
2.3
Manual calibration is activated either by plugging a jumper or with newer models, by
actuating a sliding switch on the printed circuit board (see Figure 6). These contacts are
only accessible after breaking the seal and opening the scale. After plugging the jumper
or actuating the sliding switch, the scale has to be switched on to start manual
calibration. Depending on the subsequent loading method (in the centre or a corner of
the weighing surface) either linear calibration of the scale is performed or calibration of
corner loading, which is essential when a load cell is replaced.
Figure 6: Jumper contacts or slide switch to activate manual calibration

2.3.1 Linear calibration

The following steps are necessary to perform manual calibration:
1. Switch on the scale and check the battery charge. If the battery voltage
is insufficient, either the battery warning symbol or the "bAtt" display will
be activated. If one of these displays appears before, during or
immediately after calibration, the batteries should be replaced and the
calibration procedure repeated.
2. Then switch the scale off and open the display housing by releasing the
four screws after having removed the seals.
03.04.2013/JEG
[769|780|799|869|899]
11 (24)
seca
30-34-00-864