Rev. 01/11 -3.10- TFXL-X
To adjust the range of the 4-20 mA output, simply enter the flow rate
that corresponds to 4 mA output in the box titled Flow@100Hz, then
enter the flow rate corresponding to 20 mA at @10kHz. Click the
Download button and the new range will be established. The flow
rate units must be identical to the Flow Rate Units entered in the
Flow TAB. See Figure 3.4 on page 3.4.
To alter the factory set K-factor setting, two pieces of information
must be known—maximum flow rate and desired K-factor. Convert
the maximum flow rate to gallons/second, then multiply by the
desired K-factor (pulses/gallon). This value equals the maximum
frequency output from the flow meter. Multiply this value by four to
calculate the value to be entered into the 10 kHz Calibration box.
Press the Download button to save and establish the new K-factor.
By altering the factory setting, the 20 mA setting will not be correct.
Example:
Maximum Flow Rate = 400 GPM
Desired K-factor = 52 pulses/gallon
6.67 Gallons/second = 400 Gallons/minute
346.67 Hz = 6.67 Gallons/second 52 pulses/gallon
1,386.67 = 346.67 Hz 4
Enter 1,387 into the box at Calibration 10 kHz
NOTE: An entry of 4,000 in the Calibration 10 kHz box will cause
an output of 1,000 Hz to occur at full scale flow rate.
PART 3 - PROGRAMMING
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