Hoffer Flow Controls CAT3-DC-MIL User Manual page 20

12 Installation
significant digit of the total. When observing metered flow on an
external counter or oscilloscope, the pulse output will display bursts of
metered units due to the number of pulses in each 1 second increment
of time determined by the Pulse Frequency setting. For steady flow, an
oscilloscope will show the pulses per second for each second, a counter
may seem erratic and increase 2 units for the first second then 3 units
for the second (displaying as follows; 0, 2, 5, 7, 10...). The maximum
number of pulses per second is 100.
The following configuration parameters affect the operation of pulse
output.
Total Decimal Places: Sets location of the total decimal places after the
decimal. Select 0, 1, 2, or 3 (xxx, xxx.x, xxx.xx, xxx.xxx). Total decimal
point determines the resolution of flow total.
E.g. If total decimal point is set to 2 (xxx.xx), one output pulse
represents 0.01 of total in selected units of measure.
If flow rate is 30GPM, which equals to 0.50 gal per second, there will be
50 output pulses per second.
Pulse Scale: Allows the user to reduce the output frequency when the
turbine pulse frequency is too high. If Pulse Scale OFF is selected, then
the pulse output is disabled. Select 1, 10, 100. Number of output pulses
can be divided by 1, 10, 100. The divider is used when output frequency
exceeds the CAT3 max allowable number of 100Hz.
Note: Number of output pulses can be also reduced by changing Total
Decimal Places.
Pulse Frequency:
1, 2, 4, 8, 100 cps. (cps - cycles per second).
HP-324-5
Example of 4Hz pulse output
Sets Frequency/Pulse Width for output pulse. Select