Sierra InnovaMass 240i Series, Инструкция по эксплуатации, Страница: 76 / 115

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Note that accuracy is still based on the original factory calibration full scale
value.
4mA for flow is always set to zero flow.
Factory calibration full scale is calculated for the application using the meter
sizing tool.
www.sierrainstruments.com/products/tools/innovamass_sizing.html
Press enter

and the units will begin flashing. As in previous examples, use the

buttons to enter the desired value, and the enter key

to save the value. This concludes
our review of the Calibration Sub-Menu. Press the exit

climb back up to the main menu.
Setting Up: 4-20mA Outputs
We will set “Flow” 4-20mA to demonstrate this function. The same routines apply for setting up
“Pressure” 4-20 mA and Temperature 4-20mA.
Flow 4mA : View, Adjust, Test
Navigate to the “Flow 4mA” screen in the Output (Sub Menu). Use Table 13 above for guidance.
From this menu, press enter to get to the flow 4mA setup screen.
This numeric value is the Digital to Analog Converter (DAC) value that produces 4mA on the
analog flow output. In the example screen DAC is 11373. Press enter (

) and the units will
begin flashing. Increasing this value will raise the 4mA output and decreasing this value will
lower the 4mA output. Use the

buttons to enter the desired numeric value, and the enter
key (

) to save the value.
Test it
You can then use the down

button to force/test flow 4mA output and hit the up

button to stop
the force/test. It will flash testing until you stop the test. You can repeat this process, if desired,
until you achieve the desired result.
Flow 20 mA : View, Adjust, Test
Flow 4mA
11373
Flow 4mA
11373 - Testing
Full Scale Flow
100.00 SCFM