Laurel-electronics LAUREATE SERIES 2 COUNTER-TIMER-SERIAL INPUT METER Uživatelský manuál stáhnout pdf (Strana 18)

• TOTAL A B INHIBIT (A_bInH) (Extended counter) displays Total A as Item #1, where

counting may be inhibited by a control input on Channel B. If the menu item SLOPE is set

to 0 for Channel B (digit 6), a low input level on B allows counting, and a high input level

inhibits counting. If the SLOPE for Channel B is set to 1, the opposite occurs. The

maximum frequency on A that can be counted is 1 MHz. Overflows are displayed as #2.

(See Total A only)

BATCH CONTROL MODE (_bAtCH)

BATCH CONTROL WITH A 36.67 PULSE/GALLON TURBINE FLOW METER

Application: Fill 55 gallon tanks, measur-

ing flow with a 36.67 pulses/gallon

flow

meter. Slow down filling at 54 gallons.

Cycle batches automatically with 20 sec

between cycles. Display batch total & fill

rate to 2 places. Track number of batches.

Solution: Use an Extended counter w

ith a

dual relay output board. Apply the flow

meter signal to Chan

nels A & B. Set Input

to “Rate Batch.” Set Batch to count up to

Setpoint1. Use Gate Time as delay be-

tween batches. Make Item #2 the number

of batches. Set Gate Time to 20 sec. Set

an adapt

ive moving average filter, which

will apply to rate only, not totals. Set

DecPt1 and DecPt2 to two decimal places

for Items #1 and #3 (Batch Total and Rate).

Scale Item #1 (Batch Total) by entering a

Scale1 of 2.72702 (counts per pulse) and a

Setpoint1 of

55.00, which will serve as the

batch setpoint in gallons. Scale Item #3

(Rate) using the co

ordinates of 2 points

method so that 36.67 pulses/sec will be

dis

played as 60.00 GPM. Set Setpoint2 to

54.00 to activate Relay 2 to slow the fill

rate at 54.00 gallons.

Batch control (Extended counter) uses the meter with a dual relay controller board to

control repetitive fill operations. Relay #1 is used as the batch relay. Relay #2 (or Setpoint

#2) can be assigned to another limit, such as pre-warn to slow filling near the setpoint, end-

of-process, or rate alarm. The same signal is applied to Channels A and B. When digit 6 of

bAtCH (Action after Meter Reset) is set to zero, the following applies:

• In batch control mode without external resets, the meter waits until the RESET key is

pushed. It then energizes Relay #1 and displays the changing Batch Total. When the

preset value is reached, Relay #1 de-energizes for the duration of the gate time setting.

Relay #1 then re-energizes, the Batch Total resets, and the fill cycle repeats.

1 2 ... 13 14 15 16 17 18 19 20 21 22 23 ... 79 80

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Laurel-electronics LAUREATE SERIES 2 COUNTER-TIMER-SERIAL INPUT METER Uživatelský manuál Strana 18

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