DI-2008 Hardware Manual
Controls, Indicators, and Connections
18
measure the output of a flow meter that can measure a maximum flow rate of 100 gallons per minute, and the output
frequency at that rate is 100 Hz, you would choose the 100 Hz range setting. A range setting of 200 Hz full scale sac-
rifices half of the instrument's resolution at 200 gallons per minute, and a range of 50 Hz allows measurements to
only 50 gallons per minute full scale.
Check the
Cycles/min
box to display and select frequencies reported in cycles per minute instead of cycles per sec-
ond (the measurement interval remains the same). Tachometer measurements in units of RPM (revolutions per min-
ute) is just one example that benefits from selecting this option. For example, if the 100 Hz range setting is selected
and
Cycles/min
is checked, the full scale range is actually 6000 cycles per minute.
W
IN
D
AQ
Counter (D3 Count)
Enable channel 11 to record Counts, or the number of falling-edge transitions that are applied to this input. The count
may be reset via W
IN
D
AQ
software or under program control as necessary. Click on
Edit
>
Channels
in the W
IN
D
AQ
