Emerson FIELDVUEDVC2000 Manuale delle Istruzioni Scaricare il pdf (Pagina 55)

Instruction Manual

D103176X012

Detailed Setup and Calibration

April 2014

2. Place the instrument In Service and verify that the travel properly tracks the current source.

Manual Calibrate Travel

Two procedures are available to manually calibrate travel:

D Analog Adjust

D Digital Adjust

Analog Calibration Adjust

Connect a variable current source to the instrument LOOP + and LOOP - terminals. The current source should be

capable of generating 4 to 20 mA. Follow the prompts on the Field Communicator display to calibrate the instrument's

travel in percent.

Note

0% Travel = Valve Closed

100% Travel = Valve Open

1. Adjust the input current until the valve is near mid-travel. Press OK.

Note

In steps 2 through 4, the accuracy of the current source adjustment affects the position accuracy.

2. Adjust the current source until the valve is at 0% travel, then press OK.

3. Adjust the current source until the valve is at 100% travel, then press OK.

4. Adjust the current source until the valve is at 50% travel, then press OK.

5. Place the instrument In Service and verify that the travel properly tracks the current source.

Digital Calibration Adjust

Connect a variable current source to the instrument LOOP + and LOOP - terminals. The current source should be set

between 4 and 20 mA. Follow the prompts on the Field Communicator display to calibrate the instrument's travel in

percent.

Note

0% Travel = Valve Closed

100% Travel = Valve Open

1. From the adjustment menu, select the direction and size of change required to set the travel at 0%.

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Emerson FIELDVUEDVC2000 Manuale delle Istruzioni Pagina 55