Why do the KERN EW - 300 - 2M Scales display not light up?
The display might not light up due to several reasons: * A defective EW/EG board – consider replacing it. * A defective AC adapter – consider replacing it. * Incorrectly connected cords inside – check and correct their connections. * A discharged built-in battery (if applicable) – consider replacing it.
What to do if the KERN EW - 300 - 2M Scales display doesn't settle down or the zero point drifts?
If the display doesn't settle, repeat correctly, or the zero point drifts, it could be due to: * Some parts, like the stopper, touching others – adjust the position of the stopper. * The weighing pan touching other parts – ensure it doesn't touch anything. * A foreign substance inside – remove it. * A defective tuning-fork sensor or mechanism unit – consider replacing it. * Environmental factors like wind or oscillation – check the environment, working base, and stabilization time setting.
What does o-Err mean on KERN Scales when the load is less than specified?
An 'o-Err' message with a net load less than specified capacity could mean: * The weight on the scale pan (net weight + tare value) exceeds the scale capacity – reduce the weight. * Coefficient memories have changed due to noise or static electricity – adjust linearity. * There's a mistake in the setting of address data – correct the setting. * The calibration weight is incorrect – use the correct calibration weight.
What to do if the display on my KERN EW - 300 - 2M suddenly disappeared?
If the display suddenly disappears during operation, it could be due to: * A consumed built-in battery (if applicable) – consider replacing it. * A defective EW/EG board – consider replacing it. * A defective AC adapter – consider replacing it.
What does 'u-Err' or 'o-Err' after self-test mean on KERN EW - 300 - 2M?
If you see 'u-Err' or 'o-Err' after the self-test, it might be caused by: * Using the wrong weighing pan – use the correct one. * A defective tuning-fork sensor or mechanism unit – consider replacing it. * A defective EW/EG board – consider replacing it. * A mistake in the setting of address data – correct the setting. * Coefficient memories changed by noises or static electricity – adjust linearity.
Why is the span out of the specified range on my KERN Scales?
If the span is out of the specified range, it could be due to: * A defective tuning-fork sensor or mechanism unit – consider replacing it. * A defective EW/EG board – consider replacing it. * A mistake in the setting of address data – correct the setting. * Coefficient memories changed by noises or static electricity – adjust linearity.
Why is linearity out of the specified range on my KERN Scales?
If linearity is out of the specified range, it could be caused by: * A defective tuning-fork sensor or mechanism unit – consider replacing it. * A mistake in the setting of address data – correct the setting. * Coefficient memories changed by noises or static electricity – adjust linearity. * Using an incorrect calibration weight – use the correct weight.
What to do if KERN EW - 300 - 2M Scales show too much corner error?
If there's too much corner error, it might be because: * The mechanism unit is defective, such as a bent or twisted Roberval plate (spring) – consider replacing the mechanism unit. * The pan base is touching other parts – adjust the position of the pan base.
What does 'b-Err' mean on KERN EW - 300 - 2M?
A 'b-Err' message indicates that: * The EW/EG board is defective – consider replacing it. * Coefficient memories (address data) have changed due to noises or static electricity – adjust linearity.
What does '1-Err' mean on KERN EW - 300 - 2M Scales?
A '1-Err' message indicates that the calibration weight is less than ½ F.S. Use a calibration weight that is at least ½ F.S.
Block diagram for KERN EW type electronic balances.
Block diagram for KERN EG type electronic balances.
Wiring diagram for KERN EW type electronic balances.
Wiring diagram for KERN EG type electronic balances.
Flowchart for troubleshooting electronic precision balances.
Table of common symptoms, causes, and remedies for balance issues.
Initial checks to perform before troubleshooting balance problems.
Step-by-step guide on disassembling the balance case.
Explanation and illustration of the lock switch function.
Instructions for reassembling the balance case.
Procedure for calibrating the span on EW type balances.
Steps to adjust corner errors on the balance.
Guide for adjusting the overload stopper mechanism.
Procedure for calibrating built-in weight on EG scales.
Steps for replacing the weighing mechanism unit.
Procedure for installing a new DJD circuit board assembly.
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