Emerson Micro Motion 3711 Configuration And Use Manual page 202

Calibration
3. Open the AI Calibration panel.
4. To get a current AI value, enable
5. Click
6. If you are calibrating an RTD, disconnect the RTD input from the Model 3711 RTD terminals,
and connect a decade box (or comparable equipment).
7. Click
dialog box displays actual input from the test device in the
actual input from the test device, and allows you to specify the position of midpoints.
Figure B-1
8. To set the zero point:
a. Set the input from the test device to the level that is equivalent to the Low Reading EU of
the process variable.
b. Click
9. To set the span:
a. Set the input from the test device to the level that is equivalent to the High Reading EU of
the process variable.
b. Click
10. To complete the calibration at this point, click
a. Set the input from the test device to the first midpoint value.
b. Enter the midpoint value in EUs in the
c. Click
d. Repeat for midpoints 2 and 3, or click
11. At the AI Calibration panel, click
unfrozen and returned to normal operation.
12. Reconnect the RTD input if required.
194
. This holds the AI value from Step 4.
Freeze
. The dialog box shown in Figure B-1 is displayed. During calibration, this
Calibrate
Calibration dialog box
.
!Set Zero
.
!Set Span
.
!Set Mid 1
or click
Auto Scan Update
. To enter one or more midpoint values:
Done
Dead Weight/Tester Value
.
Done
. The calibration is saved and the analog input is
OK
Micro Motion
.
field displays the
Live Reading
field.
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Model 3711 Gas Flow Computers