Irregularities And Diagnosis - Altec EI-185 Manual De Instrucciones

ALTEC INSTRUCTION MANUAL • M-404-001 rev. 1
8.0

Irregularities and Diagnosis

8.1 Excessive Output Signal without Load
Try to zero the zero trimpots (RV1 and RV5).
An eventual misalignment of the load cells may exist, thus causing a high pre-load.
The sensor roll assembly can be excessively heavy. In most of the cases, the sensor roll should not
weigh more than the half of the maximum working force of the load cells.
8.2 Low Output Signal
The load cell may have an excessive capacity for the application. Replace by other with a lower
capacity or increase the embracing angle of the sheet on the sensor roll.
8.3 Output Signal Oscillations Increase when Increasing the Load
The load cells may be overloaded and hitting their limiters. Replace them by others with higher
capacity or reduce the load. This can be made jointly with the reduction of the embracing angle of the
sheet and/or using a lighter sensor roll.
8.4 Wrong Polarity in the Output Signal
The load cells can be wrongly oriented. Turn them 180º. If the rotation is not possible, change the
position of the cables 1 and 4 of the ALTEC cells in the tension indicator, or the cables B and C in the
CMC cells.
8.5 Non-Linear Output Signal. The Zero Reading Oscillates During Operation.
Check the load cells and sensor roll assemblies. All mounting screws must be tightened. Check
that there is no dirty or foreign materials interfering with the assembly.
8.6 No Signal
Check that all connections have been made and whether or not the cables are cut or broken.
Check the power supply in the indicator.
8.7 Very High Output without Load
Check that cables and connectors are correctly interconnected. Check the load cell wiring is appropriate.
Check whether or not the load cell resistance is compliant with the respective instruction manuals.
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