Hydrotech MP Series PULSAtron - Manual (Page 13)

13
EXTERNAL PULSE CONTROL - MULTIPLICATION
The pump operates as described previsously 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 (direct) option, the pump responds linearly to a current signal from the incoming signal port over
the full operating span from 0% (4 mA) to 100% (20 mA). For example, a 12 mA signal causes the pump to operate
at 50% of full.
In the 20-4 mA (reverse) option, pump response is the reverse of the above: from 0% (20 mA) to 100% (4 mA).
In both the 4-20 mA and 20-4 mA options, a Ratio from 1 to 99% can be applied to step down the response. For
example, a 12 mA signal at a 50% ratio causes the pump to respond as if the signal were only 6 mA (50% of 12
mA).
In all the above options, the Signal Loss alarm is triggered whenever the signal drops below approximately 2 mA
for several seconds. 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.
* Pumps with version numbers "B4" and "GB4" (displayed on power-up) use settings of seconds and minutes.
RELAY SETTINGS
The following relay output options can be brought up on the menu by pressing the Yes button while the pump is
in an operating condition (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 and the display will automatically return to the previous
operating display.