Pulsafeeder PULSAtron Series MP EN - Manual (Page 14)

14
EXTERNAL PULSE CONTROL - MULTIPLICATION
The pump operates as described previously except that incoming pulses are multiplied by a value from 1 to 999 prior to
actuating the pump and then worked off at a selected stroking rate. For example, at a multiplier of 5 and a stroking rate of
25%, each incoming pulse causes the pump to stroke five times at 25% stroking rate and then stop. During operation, the
display shows the present value and the present count on a running basis. Unless Pulse Storage is in effect, additional
external pulses received while responding to a previous pulse are ignored.
This option is similar to Stroke Counting (see below) except that action is initiated automatically by one or more external
pulses rather than once manually by the user. There is no Full Count alarm as in Stroke Counting since it is always
possible to receive additional external pulses.
The Pulse Storage option operates as described above.
EXTERNAL CURRENT SIGNAL CONTROL
In the 4-20 mA option, the pump responds linearly to a current signal from the incoming signal port over the programmed
operating rate. The rate can be any value from 0% to 100% and the current signal can be any value between 3.5 to 20.5
mA. The actual current signal can be calibrated to match that of the sending device.
For example: if the pump was set for a low signal of 4mA, a high signal of 12mA, a low rate of 0%, and a high rate of 80%
- an incoming signal of 10mA would cause the pump to stroke at 60%.
The pump software allows the high and low rates to be inverted to produce a slower rate as the input signal is increased.
For example: if the pump was set for a low signal of 4mA, a high signal of 12mA, a low rate of 100%, and a high rate of
20% - an incoming signal of 8mA would cause the pump to stroke at 60%.
A Signal Loss alarm is triggered whenever the signal drops below approximately 2 mA. The pump stops operating during
the loss of signal condition, and automatically resumes normal operation when the signal is restored.
STROKE COUNTING
The pump delivers a preset number of up to 9,999 strokes at a selected stroking rate. During operation, the display
shows the preset value and the present count on a running basis. When the preset number of strokes has been
delivered, the pump stops and the Full Count alarm is triggered. Pressing Yes when the Full Count alarm is displayed
brings up the reset prompt. Continue pressing Yes to repeat the same stroking cycle or change the displayed values as
they are presented to change the stroke count.
This option is similar to External Pulse Control - Multiplication (see above) except that action is initiated once manually by
the user rather than by one or more external pulses.
TIMED OPERATION*
The pump operates for selected run times from 1 to 999 minutes (16.65 hours) at selected intervals from 1 to 999 hours
(41.625 days) at a selected stroking rate. For example, the pump might be set to operate for 60 minutes every 168 hours
(7 days), at a 50% stroking rate. During operation the pump displays the run time in minutes and the interval in hours.
RELAY SETTINGS
The following relay output options can be brought up on the menu by pressing the Yes button while the pump is in the
menu settings (Relay options vary with operating condition). Press the No button to scan through the options available.
Only one relay output option may be selected. When the desired option is displayed, press the Yes button. This will set
the relay for the chosen option.