Dynasonics MFX Series Insertion MagProbe Flow Meter - Manual (Page 59)

Rev. 01/11
-4.7- MFX
4-20 mA Module Configuration
If the 4-20 mA output has been installed, the screen shown in Figure
4.4 on page 4.6 will appear in ULTRALINK™ at the OUTPUT tab:
x Flow @4mA and Flow @20mA set the span of the 4-20 mA
output. The entry is made in the same flow measurement units
that were entered in the Flow tab. The output can be set to span
across zero (4 mA can be set to a negative flow value) so that
the module will output bi-directional flow. For example, if a flow
range spans from –100 to +100, the MFX will output 4 mA
at –100 and 20 mA at +100 and output 12 mA (50% of the
output) at 0.
x Calibration/Test is used to adjust the factory calibration span
of the 4-20 mA output and to test (simulate) the output. The
4-20 mA output is factory calibrated and should not require
adjustment in the field. Should the module be replaced or if
recalibration is required, the following procedure is used to
calibrate the span of the module:
1. Connect a milliamp meter serially within the 4-20 mA module
output.
2. Check the Calibration/Test box.
3. Select the 4 mA Calibration box.
4. Adjust the count value to the right of the 4 mA button until
the milliamp meter registers 4.00 mA.
5. Select the 20 mA Calibration box.
6. Adjust the count value to the right of the 20 mA button until
the milliamp meter registers 20.00 mA.
7. Press the Test button.
8. Adjust the count value to 12.
9. Verify that the milliamp meter registers 12.00 mA.
10. Uncheck the Calibration/Test box.
PART 4 - SOFTWARE UTILITIES