DORAN MODEL 8000
OPERATING AND SERVICE MANUAL
MAN0002-42 of 33
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7.1 PROBLEMS/SOLUTIONS
Problem : Scale locked or in a display loop.
Remedy : Press and hold the TARE and CONV push buttons at the same time for 1-2
seconds. The scale should shut off. Press the ON/RESTART to operate
scale.
Problem : Weight reading will not repeat or scale does not return to zero when weight
is removed.
Remedy : Make sure that there is nothing caught in the platform under or around the
load cell or spider interfering with their movement.
Problem : Scale overloads early.
Remedy : Check to make sure all four overload stops are properly set.
1. Invert platter.
2. Place 1/2 capacity in test weights on the corner of the platform.
3. Check/or adjust the gap between the stop and the bottom of the spider
to 1/32"
4. Check all four corners then recalibrate the scale.
If the problem persists,it's possible that the scale is being shock-loaded
causing the zero to be shifted. Review Section 2.0 of the manual.
Problem : Scale will not indicate full capacity or go into overload.
Remedy : Make sure that there is nothing caught in the platform under or around the
load cell or spider interfering with their movement. If not, check the overload
stops using the above procedure. Recalibrate the scale.
Problem : Scale will not come to zero when ZERO or TARE is pressed.
Remedy : Make sure that the scale is stable ("MOT" light is off) when either pushbutton
is pressed. If the scale is stable, there may be a problem with the touch-
panel or PCB.
Problem : Weight readings don't seem to be correct.
Remedy : Check the scale calibration with test weights. Recalibrate the scale if necessary.
Problem : Scale drifts off of zero.
Remedy : Check for air currents and/or vibration around the scale platform. If that is the
cause, it may be necessary to set the AZT aperture to a wider setting
Problem : Scale reading is bouncing.
Remedy : Check for air currents and/or vibration around the scale platform. If that is
the cause, it may be necessary to set the Digital Averaging to a higher
setting to stabilize the reading (See Section 3.4.1).
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