Pulsafeeder Pulsa Series Pulsamatic Controls - Manual (Page 7)

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1.4 Control Modes
Ratio Control- When ratio control is applied, the range of stroke adjustment is proportionally
reduced to a level equal to the ratio setting. For example, at a ratio setting of 60%, the full span of
the input signal commands the pump to operate between zero and 60% of full stroke rather than
over the full range of the stroke. The ratio is manually set between zero and 100% using a remote
potentiometer.
Split Ranging- A single control signal command s two pumps, each pump responding only to a
portion of the total range of the signal. The PULSAmatic controller operates specifically as
follows: One pump is commanded from zero to full stroke over the lower half of the input signal,
and a second pump is commanded, in the reverse-acting mode, from full to zero stroke over the
higher half of the input signal. For example, a 4-20 mA input signal controls the first pump
between zero stroke at 4mA to full stroke at 12 mA and controls the second pump between full
stroke at 12 mA and zero stroke at 20 mA
Manual- Remote manual stroke adjustment potentiometer.
Auto-Manual- Remote switch selection between automatic and remote manual operation.
1.5 Current Output Signals
0-10 mA DC – 500 ohm Impedance max.
4-20 mA DC – 250 ohm Impedance max.