YZ Systems NJEX 7300L, Instructions & Operating Manual, Page: 54 / 126

YZ Systems, Inc. • 3101 Pollok Drive • Conroe, Texas • USA • 77303 • P: 936.788.5593 • F: 936.788.5720
Page 44
NJEX 7300L ver.09042003
SSSSS
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
Pulse Flow Input Calibration,
Dry Contact & Voltage Pulse
Choose *Set from the main menu, figure 101.
Choose *Cal from the set select menu, figure 102
Choose *Inputs from the calibration set menu,
figure 103.
Choose *Flow from the flow input type menu,
figure 104.
Choose *Pulse from the flow input type menu for digital
pulse inputs, i.e. dry contact, voltage pulse, etc, figure
105.
Calculate Pulse Input Frequency
Using example 1 or 2 on page 45 a technician can
calculate the Pulse Input Frequency required to
effectively calibrate the NJEX System.
The pulse input frequency must be between
10 -1000 pulses per second (Hz). Choose PPS,
figure 106.
Span Adjustment, is used to calibrate the N-300 control-
ler for 100% of metered flow at maximum input fre-
quency, i.e. 50 pulses per second at maximum gas flow.
To set the span adjustment, figure 107, 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.
Figure 101
pmp bat vmtr sig tnk
PropFlow
Idle
*Strt *Dsp *Set
pmp bat vmtr sig tnk
Set Selection
*Par *Cal *Esc
pmp bat vmtr sig tnk
Calibration Set
*Clk *Inputs *Esc
pmp bat vmtr sig tnk
Calibration
*Flow *Pres *Esc
pmp bat vmtr sig tnk
Flow Input Type
*Ang *Pulse *Esc
Figure 102
Figure 103
Figure 104
Figure 105
pmp bat vmtr sig tnk
Span Adjustment
50 Pul/sec *Esc
Figure 107
pmp bat vmtr sig tnk
Pulse Input
*PPS *PPMV *Esc
Figure 106