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AW Company 8809 Industrial Drive, Franksville, WI 53126 à web: www.awcompany.com
Tel: 262-884-9800 Fax: 262-884-9810 | Email: aw@awcompany.com
REV. 4 10/05 EMO-500 Manual.DOC
20
NOTE: The pulses being counted are straight from the flow meter,
not scaled engineering unit values.
5. Units for Rate.
This variable will display the Engineering Units required for the flow rate display. This
is strictly a display and does not perform the actual conversion of raw counted impulses.
Those calculations are handled by the KFR. Enter the two digit number for the desired
Units for Rate.
00 - cc/min 06 - gram/sec
01 - liter/min 07 - lb/min
02 - gallon/min 08 - Kg/min
03 - ounce/min 09 - Kg/sec
04 - RPM 10 - lb/sec
05 - gram/min 11 - lb/Hr
12 - Hz (Impulses/sec)
6. Enter Units for Total.
This variable will determine the Engineering Units for Total displayed after the
totalizer value. It is also a display function only and doesn't perform the actual
conversion of total impulses to the correct value. Those calculations are handled by the
KFT.
Enter the two digit number for the desired Units for Total.
00 - cc 04 - revolution
01 - liter 05 - gram
02 - gallon 06 - lb
03 - ounce 07 - kg
08 - Impulses
7. Sample Size..................................................................................................Default 200
To determine the ratio the total number of pulses from both flow meters are separately
counted until one of them reaches the programmed Sample Size. The number of pulses
from flow meter A is then divided by the number of pulses received from flow meter B.
The accuracy and response time of the ratio calculation are therefore dependent on
the Sample Size.
To determine a reasonable number to program for Sample Size the main factor will be
the flow meter with the lowest pulse rate should produce at least 100 pulses before the
Ratio calculation. If 100 pulses are counted on the slowest moving totalizer then the
accuracy of the ratio calculation should be about " 1 %.
The display screen #7 (Status Disp. 2) is a useful guide in this selection. The lower line
shows the incoming raw pulse count. If the Sample Amount is say 1000, the ratio display
will update each time the fastest total increments by 1000. Also by this method, the
slower pulse count can be observed. The default value is 200