Milltronics ACCUMASS BW500 - Auto Zero

PL-565 Accumass BW500 Page 47
Recalibration
Auto Zero
The Auto Zero function provides automatic zero calibration in the Run mode under
the following conditions.
• the auto zero input (terminals 29/30) is in a closed state; jumper or remote contact
• the load on the belt is less than
±
2% of the design load (P952)
• the terminal and load status coincide for at least one belt revolution
The rate display is interrupted by the Auto Zero routine
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The duration of the auto zero is one or more belt revolutions (P360). If either
condition is interrupted during that period, the auto zero is aborted and the run
display is resumed. After one belt revolution, another auto zero will be attempted if
the input and load conditions are met.
If the resulting zero deviation is less than an accumulated 2% from the last operator
initiated zero, the auto zero is accepted.
If the deviation is greater than an accumulated 2%, an error message is displayed.
The error message is cleared after five seconds, however if a relay is programmed
for diagnostics, it remains in alarm so long as the Auto Zero conditions are being met.
If material feed resumes during an auto zero function, the totalizing function is
maintained.
Routine Span
Note:
In order to obtain an accurate and successful calibration, ensure that the required
criteria are met. Refer to Calibration Criteria on page 139.
Press
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e.g. typical zero and deviation values
for example, the current span count
do a zero calibration or press