Laurel Electronics LAUREATE SERIES 2 COUNTER-TIMER-SERIAL INPUT METER - Manual (Page 16)

16
• RATE A, TOTAL B (A_btot) (Extended counter) displays Rate for Channel A as Item #1
and Total for Channel B as Item #2.
• RATES A+B, A-B, AxB, A/B, A/B-1 (Extended counter) display arithmetic combinations
of Rates A and B as Item #1, Rate A as Item #2, and Rate B as Item #3. With rates A and
B scaled to produce a ratio close to 1 and an offset of -1, the special combination A/B-1,
called “Draw,” can display percentage changes, such as elongation of material as it
passes between rollers.
TOTAL MODES
DISPLAY TOTAL IN GALLONS FROM 36.67 PULSE/GALLON TURBINE FLOW METER
Application: Display total in gallons with
two decimal places for flow meter calibra-
ted to 36.67 pulses/gallon.
Solution: Set Input to “Total A Only.” Un-
der Setup, select “Restore totals at power-
on” and coordinates of 2 points method.
This is the preferred scaling method. Set
gate time to its minimum of 0.01 sec for
smooth display updates. Set DecPt1 to two
places. Then enter low input and desired
low reading, and high input and desired
high reading for display of 1.00 for 36.67
pulses, as shown.
DISPLAY SIMULTANEOUS RATE & TOTAL FROM 36.67 PULSE/GALLON FLOW METER
Application: Display flow rate in GPM with
two decimal places and total gallons with
no decimal places from the same flow me-
ter signal calibrated to 36.36 pulses/gallon,
applied to Channel A
Solution: Use an Extended counter, as
required for simultaneous rate and total.
Set Input to “Rate A A Total.” For flow rate
in GPM (Item #1), set DecPt1 to two deci-
mals, and scale the display by entering Lo
In1, Lo rd1, Hi In1, Hi rd1 as shown. For
total in Gallons (Item #2), set DecPt2 to no
decimals, and scale the display by entering
Lo In2, Lo rd2, Hi In2, Hi rd2 as shown.
Enter a Gate Time, such as 0.1 sec, which
is long enough to produce stable rate read-
ings, but is short enough to produce rapid
updates of total.