Liquid Controls SP2900 - Manual (Page 20)

NOTE A: Unit defaults “0” K-Factor to K-Factor
of “1” since it is impossible to
divide by “0”.
NOTE B: “Point 01” will be the “low shut-off”
frequency. Below this frequency
no rate will be displayed nor
count recorded. Point 01 should be
assigned a frequency of “0” with a
K-Factor for lowest flow especially
if very slow flow is to be counted.
NOTE C: The entry of a frequency of “0” for
“Point 03” or above will tell the
unit to continue the K-Factor slope
line calculated from the two
previous Frequency/K-Factor points
and ignore any higher point data.
If a fixed K-Factor is desired, assign
the same K-Factor to two ascending
frequency points and enter a
frequency of “0” in the next higher
point entry.
NOTE D: K-Factors are always positive
numbers. To avoid undesired
K-Factors projected around “0”
K-Factors, insure that a positive
K-Factor is assigned for the highest
used frequency.
NOTE E: The decimal in the “Total” and “Grand
Total” is a dummy. The K-Factor
should be calculated to show all
numbers as if there were no decimal
and then decimal added under DEC
LOC section of DEV TYP MENU.
Note that the autoranging decimal in the rate (R) display
will be shifted to the left as the “Dummy Decimal” is shifted
to the left so that the rate display will be the same as the
count. Example: A meter gives 33.4 pulses per gal. and it is
desired to display in 1/10 gal. Move K-Factor decimal place
to the left and key-in a decimal under DEC LOC MENU. K-
Factor for gal. and 1/10 is 3.34 Rate will show 3.34 with
decimal added while it would show 33.4 if no decimal were
added.
TEST MODE
A special “TEST” mode can be selected to help set-up the
points and K-Factors. If “TEST” is selected, the RATE (“R”
display) will show the frequency (pulses per second) of the
incoming signal. The TOTAL section will accumulate one
count for each incoming pulse.
TEST MODE K-FACTOR CALCULATION
Calculate the K-Factors for flow meters with pulse or
analog transmitters:
A) Set the 16 point units to “TEST” and ENT
point 00 to go to the run mode.
B) At the lowest desired flow rate, rest the
counter and let the unit count the incoming
signal while the rate displayed is recorded.
C) Interrupt the input signal when the known
tested volume has gone through the
flow meter. Switch to count display and
read the number of counts that came in
from the known volume as displayed on
the unit. Divide the counts by the volume
that past through the meter to determine
the number of counts for 1 unit of measure,
gallon, cubic foot, etc.
D) Record this frequency and K-Factor for later
entry into point 1 or point 2.
(See NOTE B above to determine if data
should be entered in point 1 or 2).
E) Assign ascending point numbers to
correspondingly ascending frequencies
when recording frequency/K-Factor data.
A minimum of 3 points and a maximum of
16 points must be entered.
DATA ENTRY FOR 16-POINT
Press “D” until “16 POINT” appears on
display. ENT.
Press D to step through options:
SECONDS (Scaled rate per second selected)
MINUTES (Scaled rate per minute selected)
HOURS (Scaled rate per hour selected)
TEST (Test mode-rate per second with 1
count for each input (fixed K-Factor of 1)
selected)
Press ENT when selected option is displayed.
Point 00 will appear on the display. ENT “POINT 00” to exit
the set up and go to run mode or key in a point number
from 1 to 16 and ENT.
“K” will flash with present K-Factor for that point. ENT or
CLR and key on desired K-Factor.
Continue to step through the POINT numbers to view or
change data. If a frequency of 0 is entered, in POINT 3 or
above, the unit will ignore data above that point number. A
K-Factor generated from the line slope of the 2 previous
POINT entries will be applied to higher frequencies.
Exit “point set” routine by setting to POINT 00 and ENT.
Unit will go to run mode. “BAD FREQ” will flash when
exiting the set up mode if there is a sequence error. The
unit will then display the sequence error point # so that
corrections can be made.
If “TEST” is selected, point data can be entered into
memory but when running, unit will add one count per each
input (fixed K-Factor of “1”) and display frequency (rate per
second) of incoming signal. (See TEST MODE for more
information).
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