Hydrotech C, C PLUS, A PLUS, E, E-DC and E PLUS Series PULSAtron - Manual (Page 13)

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5.3 CAPACITY CONTROL
Capacity can be controlled by means of the stroke length adjusting knob and/or
stroke rate adjusting knob (except model C pumps). Control knobs provide coarse
adjustment; use a calibration column for accurate calibration. Contact your pump
supplier for proper calibration equipment.
5.3.1 Stroke Frequency Adjustment (E, E-DC, E Plus, A Plus & C Plus only)
• Stroke frequency can be controlled
from 10 to 100% (12 to 125 strokes per
minute) by means of the electronic
circuit.
• Stroke frequency can be set by means
of the stroke rate adjusting knob even
while the pump is in operation. (See
Figure 10)
5.3.2 Stroke Length Adjustment
• Stroke length can be controlled within
0 to 100% of the diaphragm displace-
ment. It should be controlled within 20
to 100% for practical use.
• Stroke length can be set by means of
the stroke length adjusting knob while
the pump is in operation. Do not turn
the knob while the pump is stopped.
5.3.3 Controlling Procedure
Proper set points for stoke length and stroke frequency should be determined
after consideration of the pump and characteristics of the fluid. The following
procedure is recommended from the viewpoint of pump performance. Note:
The closer the stroke length is to 100%, the better the pump performance
will be.
• Set the stroke length to 100% then adjust the stroke frequency for
coarse capacity control.
• Measure the capacity.
• When the measured capacity is less than the required value,
increase the stroke frequency and measure the capacity again.
• Then, adjust the stroke length for fine capacity control.
• Finally, measure the capacity and make sure that the required value
is obtained.
FIGURE 10