Pulsafeeder Pulsar DLC - Manual (Page 29)

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6.1.1.3 Manual Adjustment Knob:
The manual adjustment knob is mechanically attached to the PULSAR stroke length adjustment
mechanism. The DLC uses the shaft attached to this knob to make its automatic adjustments. Visually,
the knob is a good indication of what the DLC is doing. For example, if the DLC is increasing the
pump stroke length – moving from 0 to 100% -- the knob will turn counter-clockwise until the desired
position is achieved.
If you manually adjust the knob while performing a pump calibration, the calibration session will be
terminated.
While in the Analog Signal, MODBUS Mode or while under Batch Control– any attempts you make to
change the stroke setting using the Manual Control Knob to a value other than that specified by the
remote signal will cause the DLC to make a correction.
The Manual Adjustment Knob should not be adjusted while power is removed from the DLC. If the
knob is moved while the DLC power is out, upon re-starting, the DLC will detect the movement and
perform a Zero Calibration .
W HEN THE DLC IS PERFORMING A Z ERO C ALIBRATION ( THE DISPLAY WILL READ
{CALIBRATING ZERO}), DO NOT TO TOUCH THE M ANUAL A DJUSTMENT K NOB . D URING A
Z ERO C ALIBRATION THE DLC IS SEARCHING FOR A HARD MECHANICAL STOP . A NY MANUAL
INTERVENTION COULD CAUSE THE DLC TO INCORRECTLY DETECT THIS STOP . T HIS WILL
RESULT IN AN IMPROPER CALIBRATION .
You may notice that when adjusting from a lower to a higher value (e.g., 10% to 20%) the DLC
appears to 'over-shoot' its destination and reverse direction for approximately 1/16 of a revolution.
This behavior is normal. The DLC always approaches a new position from the same direction to
eliminate backlash in the stroke adjustment mechanism.
6.1.2 Check Wiring and Close Access cover
Double check all of your electrical connections. Pay attention to polarity of all inputs and outputs –
both low and high voltage. Additionally, insure that all clamp style terminals are clamping onto the
bare conductor, not on its insulation.
Replace the wiring access cover and its 4 retaining screws with associated washers.
Use a screwdriver to tighten the retaining screws evenly. Failure to do so may cause the cover to leak
and void the Warranty. The supplied teflon washers are required to properly seal this cover. Failure
to replace these components will void the warranty.