5
FI002K0018v1530hUK – THS/21 Instruction manual for installation, use and maintenance
MAINTENANCE
188 ORIGINAL INSTRUCTION
5.5.4 Checking belt contamination
The presence of metallic contaminations or irregular accumulations of product residues on the belt,
can cause false Alarms in operative conditions or wrong detection settings.
The belt contamination check should be performed with the Metal Detector set with the correct
detection parameters; in case these parameters could be incorrectly determined because of an
Autolearn performed with the belt already contamined, follow the procedure described below:
1) Select the Product to be checked
2) With the belt stopped, perform again the product Autolearn, passing it by means of plastic
supports, invisible for the Metal Detector, and simulating the transit operative conditions.
3) With the belt in movement, without product, check that on display is not shown any false alarm
or a residual signal due to the belt, otherwise clean the belt until the false alarms are eliminated
or the residual signal is reduced; if needed, replace the belt.
4) With the belt in movement, perform again the product Autolearn under the normal operative
conditions; then check that with the product in transit there are no false alarms and that each
Sample is correctly detected. In case false alarms are still present, repeat step 3.
It is recommended to disable the Product tracking parameter (FO) in case that periodic cleaning or replacing of the belt
has not been performed regularly.
It is recommended to periodically check the belt status, cleaning and, expecially for flat belts, replacing it, as also
indicated in the Maintenance procedures for CEIA Integrated Systems. In case of a CEIA conveyor belt, refers to the
Installation Manual for instructions on how to disassembly it.
After the procedure described above, you can have an approximate measure of the current cleaning
status of the belt, to be carried out without product in transit.
- Access programming in the
Configuration > Compatibility chk
menu and check that the full
extended length of the belt has been set correctly in
Belt length
.
- Access the
Configuration > Compatibility chk > Belt contam.check
menu and press the E
key to start the procedure. The Metal Detector will ask to stop or start the conveyor belt,
according to the sequence given below:
Step 1 Step 2 Step 3 Step 4
Transport stopped Transport stopped Transport running Transport running
During the procedure the execution of more steps may be requested.
At the end of the procedure the Metal Detector will show the estimated level of belt contamination:
VERY HIGH, HIGH, LOW, NO CONTAMINATION, together with the signal values (av and pk)
received in the steps performed during the procedure.
The result takes account of the current Metal Detector settings, without considering the signal related to the product,
therefore it is necessary to check that, with the product in transit, the belt contamination level will not cause false alarms.
If there is a mechanical or electrical disturbance, the Metal Detector gives the message that the belt
contamination state cannot be shown and that the general compatibility of the Metal Detector must
be assessed first (IMPROVE COMPATIBILITY).
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