YZ Systems NJEX 7300L, Instructions & Operating Manual, Page: 55 / 126

YZ Systems, Inc. • 3101 Pollok Drive • Conroe, Texas • USA • 77303 • P: 936.788.5593 • F: 936.788.5720
Page 45 NJEX 7300L ver.09042003
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ECTION ECTION ECTION ECTION ECTION
7: 7:
7: 7:
7: C C
C C
C
ALIBRA ALIBRA ALIBRA ALIBRA ALIBRATING TING TING TING TING
S S
S S
S
IGN IGN IGN IGN IGNAL AL AL AL AL
I I I
I
I
NPUTS NPUTS NPUTS NPUTS NPUTS
Pulses/Metered Vol. Adjustment, is used to calibrate the
number of pulses that the N-300 will count to
determine that a particular metered volume (gallon
or liter), of LPG has flowed. This value will be
determined by the Flow Metering Device. The N-300
display will then display a count up to the predeter-
mined number of gallons or liters required for the
pump to stroke, as determined by the rest of the
parameters, and then the pump will stroke, and the
process will recycle again.
To set the PPMV value, figure 108, press and release
the Select key. The value entry will begin to flash
when it is chosen. Use the Up Arrow key to increase
the value and the Down Arrow key to decrease the
value. When a new value has been chosen press
the Enter key to store the value into memory. The
value entry will stop flashing when loaded into the
memory.
Calculation for Determining the Span Frequency
A X B= C
60
A = Number of pulses per gallon (liter) of LPG,
as determined by the flow metering device.
B = Maximum LPG flow rate in gallons (liters) per
minute.
C = Pulse Input Span frequency in pulses per second.
Example 1:
30 Pulses/Gal. X 100 Gal./min. = 50 PPS
60 sec/min.
Example 2:
10 Pulses/Liter X 300 Liter/min. = 50 PPS
60 sec/min.
Figure 109
pmp bat vmtr sig tnk
Pulses/Metered Vol
95 Pul/gal *Esc
Figure 108