Mettler Toledo Vertex Floor Scale 2162 IDNet

Initial Disconnection and Resistance Check

Remove power from the system and fully disconnect each load cell.

Check for proper input/output resistances for each load cell (see Table 10-2).

Perform shorted-signal symmetry test by shorting the signal leads and measuring resistance with multimeter.

Record resistance value with lead on +Excitation wire.

Record resistance value with lead on –Excitation wire.

Are the two resistance values approximately equal?

Reconnection and Excitation Voltage Check

WARNING: PERMIT ONLY QUALIFIED PERSONNEL TO SERVICE THIS EQUIPMENT. EXERCISE CARE WHEN MAKING CHECKS, TESTS, AND ADJUSTMENTS THAT MUST BE MADE WITH POWER ON. FAILING TO OBSERVE THESE PRECAUTIONS CAN RESULT IN BODILY HARM.

Ensure the scale has been installed and shimmed properly.

Check all mechanical parts to ensure proper functionality.

Place a test weight on the same location on the platform and record the weight reading.

Repeat the test weight placement several times and record each weight reading.

Did the scale provide the same weight reading each time?

Is there any damage found during inspection?

If damage is found, describe the issues

Contact freight carrier if damage is found

Record weight readings at each test weight location

Are the weight readings within the desired tolerance?

Activate trim potentiometers by opening the eight hook switches on the PCB

Start adjustment at the load cell with the highest positive reading

Adjust trim potentiometers for minor adjustments

Turn trim potentiometers clockwise for a positive increase

Turn trim potentiometers counterclockwise for a negative result

Further adjust scale by turning all potentiometers counterclockwise until weight reading stabilizes

Reapply test weight(s) to the location with the highest recorded weight reading and adjust potentiometers

Remove the access plate from the scale platform and open the junction box

Determine test weight placement based on scale capacity

Record weight readings at each location

Place test weight at location A and record the weight reading

Move test weight to location B and record the weight reading

Continue recording weight readings at each of the four locations

Adjust trimming potentiometer for load cell

Place test weight at location immediately clockwise from lowest reading

Adjust the trimming potentiometer to match the lowest weight reading