Pulsafeeder Pulsar DLCM - Manual (Page 30)

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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 DLCM uses the shaft attached to this knob to make its automatic adjustments.
Visually, the knob is a good indication of what the DLCM is doing. For example, if the DLCM 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 try to force the adjustment, the DLCM will automatically react to adjust the position to the
programmed setting. If you manually adjust the knob while performing a pump calibration, the
calibration session will be terminated
While in the Analog Signal or MODBUS Mode – 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
DLCM to make a correction.
The Manual Adjustment Knob should not be adjusted while power is removed from the DLCM. If
the knob is moved while the DLCM power is out, upon re-starting the DLCM will detect the
movement and perform a Zero Calibration .
W HEN THE DLCM 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 DLCM IS SEARCHING FOR A HARD MECHANICAL STOP . A NY MANUAL
INTERVENTION COULD CAUSE THE
DLCM
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 DLCM
appears to 'over-shoot' its destination and reverse direction for approximately 1/16 of a revolution.
This behavior is normal. The DLCM 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.