Product Calibration - HE-VA AC-LITE User Manual

6.5 Product Calibration

Ensure the feed roll setup is appropriate for the intended seed type, application
rate and forward speed range for application. Please refer to the relevant
sections of the HE-VA ApS Fitting and Operating Instructions if necessary.
1. Place a container under the seed outlet of the metering
unit then press and hold the PRIME button to dispense
the product.
2. The instrument automatically switches to the programme mode, and the display will
count up the theoretical weight (in grams) of product based on the calibration factor
currently stored in memory.
3. Once you have dispensed sufficient product, release the priming switch and weigh
the product metered out. The theoretical weight will remain flashing on the display.
NOTE: If the priming switch is held for long enough to exceed 9999 grams then the
instrument will simply show 'HiGh', informing the operator that he must re-test to
ensure the weight does not exceed 9999 grams. Simply release the PRIME button
and press again when ready to restart the count from zero.
4. Adjust the displayed weight to match the measured weight using the RATE + or
RATE - buttons.
5. Press the Ha>0 button once to display the calculated minimum forward speed
(see note).
6. Press the Ha>0 button again to save the new calibration factor. The instrument
displays 'donE' to indicate the new factor is now stored. After 3 seconds, the
instrument reverts back to the normal operating mode.
NOTE : The instrument makes the calculation from the entered working width, target
application rate, and the metered weight delivered whilst calibrating. If you find that
you cannot achieve your desired field speed, then re-configure the feed roll assembly
and repeat the calibration procedure.
HE-VA Auto-Controller AC-Lite - May 2016
19