9
G. Stroke Length
The stroke length can be adjusted on all MicroTron™ pumps. This adjustment is a
mechanical adjustment made using the large knob on the control panel. To avoid damage to
the pump, this adjustment should only be made while the pump is running at a high stroking
rate.
Always start adjusting your pump’s output down by reducing the pump’s stroking speed or
frequency. By leaving the stroke length as long as possible you decrease any chance of
loosing prime.
H.
Calculating Output
A pump’s output per minute can be determined by dividing the maximum rated gallons per
day by 1440 (minutes per day). For example, a 30 gallons per day (gpd) pump at a maximum
stroke length and speed setting of 125 strokes per minute (spm) will pump 0.000167 gallons
per stroke (gps).
30 ÷ 1440 = 0.0208 gpm ÷ 125 spm = 0.000167
With this value and the pump’s speed setting (strokes per minute) you can calculate your
pump’s output at it’s rated pressure. A 30 gpd pump set at 50 strokes per minute:
50spm x .000167gps x 1440 (minutes per day) = 12.02 gallons per day
Reducing the stroke length will reduce the pump’s output again. If the example pump above
had it’s stroke length reduced to 50% the 12.02 gallons per day output is reduced to 6.01.
(example: 12.02 gpd x 0.50 = 6.01 gpd)
A higher product viscosity will reduce the output. Pressures lower than the pump’s rating can
increase the output.
VI. Control Options
A.
Standard Control (Basic A Pump) -
See Menu Map on Page 10
Pumps continuously with speed and length adjustments.
B. 4-20mA Input (Option M) -
See Menu Map on Page 12
Option M allows the pump to accept a 4-20mA signal input to control the pump’s stroking
rate or speed from an external control device. The pump can be programmed for number
of strokes per minute at two milli-amps points on a 4-20 scale. The maximum setting is 125
strokes per minute.
C.
Selectable Timers
1.
Recycle Timer -
See Menu Map on Page 11
The recycle timer allows the pump to run based on set cycle times. The on time is adjustable
from 1 second to 99 minutes and 59 seconds. The off time is adjustable from 1 minute to 99
