Troubleshooting Table - KERN EW - 300 - 2M Service Manual

3.2 Troubleshooting table

Symptoms
No display lights on 1. EW/EG board is defective.
u-Err or o-Err
appears after self
test of segments
Display does not
get settled down
Display does not
repeat correctly
Zero point drifts
o-Err appears
with a net load
less than specified
capacity (FS + 9d)
Span is out of
specified range
Linearity is out of
specified range
Corner error is too
Display suddently
disappeared in
operation
b-Err appears
d-Err appears
EW/EG-KB-e-9811
Causes & Remedy
2. AC adapter is defective.
3. Wrong connection of connection cords inside.
4. Built-in battery (option) is discharged.
1. Wrong weighing pan is applied.
2. Tuning-fork sensor or mechanism unit is defective.
3. EW/EG board is defective.
(888...) 4. Setting of address data has mistake.
5. Coefficient memories (address data) have changed
by noises or static electricity.
Adjust linearity.
1. Some parts such as stopper touches others.
2. Weighing pan touches other parts.
3. Foreign substance is in the scale.
4. Tuning-fork sensor or mechanism unit is defective.
5. Affected by a wind or disturbing oscillation.
Check environment or working base.
Check also setting of stabilization time.
See page 9 of operation manual.
1. Big weight applied to the scale pan (net weight
+ tare value) exceeds the scale capacity.
2. Coefficient memories (address data) have changed
by noises or static electricity.
Adjust linearity.
3. Setting of address data has mistake.
4. Calibration weight is not correct.
1. Tuning-fork sensor or mechanism unit is defective.
2. EW/EG board is defective.
3. Setting of address data has mistake.
4. Coefficient memories (address data) have changed
by noises or static electricity.
1. Tuning-fork sensor or mechanism unit is defective.
2. Setting of address data has mistake.
3. Coefficient memories (address data) have changed
by noises or static electricity.
Adjust linearity.
4. Calibration weight is not correct.
1. Mechanism unit is defective, such as Roberval
much plate (spring) has been bent or twisted.
2. Pan base touches other parts.
1. Built-in battery (option) has been consumed.
2. EW/EG board is defective.
3. AC adaptor is defective.
1. EW/EG board is defective.
2. Coefficient memories (address data) have changed
by noises or static electricity.
Adjust linearity.
1. Adress data related to determine the capacity
has been destroyed -----Contact the shipper.
2. EW/EG board is defective.
1-Err 1. The calibration weight is less than ½ F.S.
2-Err 1. The data error exceeds 0.4%.
Or perhaps the scale may be defective.
Contact the shipper.
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