Ohaus Scales V71P1502T

Place the test weight in the center of the Weighing Pan.

Place half of the scale’s capacity in the center of the Pan

Enter the reading from the center of the Pan

Move the mass halfway to the front of the Pan and note any differences in the displayed weight reading

Move the mass halfway to the back of the Pan and note any differences in the displayed weight reading

Move the mass halfway to the left of the Pan and note any differences in the displayed weight reading

Move the mass halfway to the right of the Pan and note any differences in the displayed weight reading

Check maximum allowable change in displayed weight readings for each position

Is the maximum allowable change exceeded in any position?

If maximum is exceeded, follow procedures in Section 4.4.5, Adjusting Off Center Load

Power on the balance and check the display reads 0g

Select a mass weighing near the maximum capacity of the balance and place it on the center of the Pan

Remove the mass and check the reading returns to 0g ±2 count

Repeat the test three times and check if the reading is within ±2 count of the recorded reading

Is the deviation for any set of readings greater than ±2 d?

Inspect for mechanical obstructions and correct if necessary

Move the scale to a suitable location, ensure it is level, and try again if necessary

Disconnect the cable connecting the Main PCB to the scale’s power system.

Remove the four screws that secure the PCB to the bottom housing.

Note the order of the wire colors and disconnect the Load Cell Cable from the Main PCB.

Installation of Replacement PCB

Position the replacement PCB as in Figure 3-2.

Insert and tighten the screws to secure the PCB to the bottom housing.

Re-connect the Load Cell Cables to the PCB in the original position.

Re-connect the cable connecting the Main PCB to the scale’s power system.

Ensure the scale has passed the Precision and Repeatability Tests.

Ensure the scale is calibrated before performing the Linearity Test.

Place the test mass on the Scale and record the weight.

Place Load 1 on the Scale and press ON/ Zero - Off.

Place the test mass on the Scale, record the weight and remove.