Internal Calibration Procedure - KERN FCE 3K1 Service Manual

3 Internal Calibration Procedure

1. Remove the top housing of the scale.
2. Connect J1' on the main board 5052-094108 by soldering the pads together (Fig.1).
3. Place scale on a hard level surface. With weighing pan installed, turn balance on.
Display shall show the internal counts.
4. The internal counts shall fall in the range from 2 000 to 5 000.
In case out of this range, connect J9 left side or right side to increase or reduce the
reading (Fig.1).
Connecting or disconnecting pads on J5, J6 or J7 can fine tune the reading (Fig.1).
5. Press [ON/OFF] key once. Display will show [ CAL ] and then the required calibration
weight. Place the corresponding calibration weight on the center of the weighing plate.
6. The display will now show [ F ] and then return to internal counts reading.
7. Remove all weights from weighing pan and plug-off the power supply.
8. Disconnect J1'.
9. Install the top housing of scale.
In case [ E ] is display instead of [ F ], this indicates a calibration procedure error,
or wrong weight applied for calibration.
Turn the scale off and then on and repeat the procedure.
4 Display Segment Test
Whenever the scale is power on, all segments of the LCD will be turn on for 2 seconds.
Check for any missing segment.
4
J1'
Fig.1
FCE-SH-e-0910