METTLER TOLEDO 2158/2160/2162 Vertex Floor Scales Service Manual
(11/96)
8-2
1. Successively place the test weight at each of the four designated
locations (center of each scale quadrant). Note and record the
displayed indications.
2. Determine the location with the lowest indication. The corresponding
load cell is NOT trimmed.
3. Place the test weight at the location with the lowest indication. Note
and record the indication.
4. Proceeding clockwise, place the test weight at each designated
location; if necessary, adjust the trimming potentiometer
corresponding to that location to obtain the indication recorded in
step 3.
5. Repeat this procedure until all indications at the designated locations
are the same or within the tolerances as specified by local weights
and measures.
6. Reinstall junction box lid and platform access plate.
Shift Adjustment for
Model 2160
The shift adjust is made at the indicator in the setup mode. Shift
adjustment procedure for model 2160, refer to manual for weight
indicator used with 2160 Vertex scale.
Shift Adjustment for
Model 2162
The shift adjustment is made by adjusting load cell trim potentiometers
mounted on the ID Net junction box PCB.
1. Successively place the test weight(s) at the designated locations and
record each reading. If the readings are within the tolerances desired,
shift adjustment will not be required. However if the readings are
not within the desired tolerances continue with the Steps 2 - 8.
2. Activate the trim potentiometers by opening all eight (8) of the hook
switches (if they are not already open) located on the PCB (see
Figure 8-b), once activated they will remain open, DO NOT close the
latches, even after the shift adjustment procedure is complete.
3. Start the adjustment at the load cell with the highest positive reading,
this process will trim the load cells to match the value of the lowest
value recorded.
4. For minor adjustments the trim potentiometers (each load cell has
two) may be turned clockwise which will result in a positive increase,
or counter-clockwise for negative results. Should the scale require
more adjustment turn all potentiometers counter-clockwise, you will
know when to stop when the indication on the instrument or meter
stabilizes.
Note: Because of the trim pots
interaction with each other, any
adjustment will affect all corner
indications.
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