Nova-Tech PGW Series - Manual (Page 40)

Page 40 of 44
Poor Linearity Usually a mechanical
problem
Electronic Problems
Re-check repeatability
*Inspection of the flexures for damage
or loose hardware may be required
*Use the Linearity Function in the
service menu to reset linearity
*A problem in the analogue circuit board
or power supplies can cause poor
linearity. Make sure all mechanical
problems have been eliminated first
OTHER PROBLEMS:
Cannot calibrate Zero shifted more
than allowed
Calibration timeout
*Check all flexures for damage
*Reset factory calibration
*Verify linearity and repeatability
*The balance may be unstable. Verify
stability as above. Try using a more
aggressive filter
Calibration weight
motor does not stop *Check the cables to the motor, try
plugging the balance into the power
again
*Look for friction in the calibration
weight movement
*Check the opto-coupler that controls
the motor position.
RS-232 not working Doesn’t print Check parameters match the device
connected
Verify cable is correct
*RS-232 circuits damaged
Display dark, keys
beep Display contrast poor
Cable unplugged or
damaged
*Check the cables to the display
*Replace the display which could be
damaged
*To be carried out by authorised technicians only.
© Adam Equipment Company 2007