11
LOAD CELL VERIFICATION
Load cells resistance measure:
Use a tester with a supply not higher than 9 Vdc.
- Disconnect the load cells from the AWT20L, make sure that there is not any moistness caused by
condensed water or infiltration of water. If so, keep cleaning the system or replace it, if
necessary.
- Carry out the measurement of the resistance as follows:
- The value between the positive supply and the negative supply must be about 350 ohm or similar to the
one indicated on the load cell data sheet.
- Value between the positive signal and the negative signal must be about 350 ohm or similar to the one
indicated on the load cell data sheet.
- The insulation value between the shield and any other cores must be higher than 20 millions ohm.
Load cells tension measure:
Use a tester with a supply not higher than 9Vdc.
- From underneath the container take out the cell you intend to check
- Connect the positive and negative supply of the load cell to the AWT20L and make sure that there is a
supply of 10 Vdc + / - 3 %.
- Measure the signal between the positive and the negative signal wires directly connected to the
multimeter, make sure that there is a signal between 0 and 0,5 mV dc ( thousandth of a Volt ).
- Load the cell and make sure that there is an increase of the signal.
IN CASE ONE OF THE ABOVE CONDITIONS IS NOT MET, PLEASE CALL THE TECHNICAL
ASSISTANCE SERVICE.
