Nova-Tech LMI Series HH Metering Pump User Manual

Page 27

12.2 Programming the Pulse Multiply (Batch) Value

The multiply value is altered by using the

(Up) and

(Down)

keys to change the value. The pump must be OFF and in the External

Multiply mode. Like the divide value, the valid range for the multiply

value runs from 0 to 999 pulses. When the pump is ON, a single

external pulse will initiate a batch of pump strokes. The number of

remaining pulses are displayed on the LCD screen

EXT

. When

0 is reached, the display resets to the multiply value. The pump is

now ready for another pulse input.

If a pulse is received before the countdown to 0 is complete, the E4

error code is displayed, and the pump batch count resets to the

programmed multiply value. The batch countdown then continues

from its programmed value. As the countdown continues, the E4

error code

EXT

will be displayed intermittently until the fault is

corrected. The strokes that remained from the first batch are NOT

accounted for. To clear the fault display, the pump must be stopped

and restarted.

To allow true flow proportioning, the speed in the Multiply mode
is equal to the speed set in the Internal (manual) mode. That
is, if the Internal mode speed is set at 60 SPM, in the External
Multiply mode the pump counts down at 60 SPM.