Emerson MICRO MOTION 2700 Manuel d'installation télécharger pdf (Page 41)

Transmitter Configuration and Use: Series 1000 and 2000 Transmitters 31

Flowmeter Startup continued

Required Configuration Optional ConfigurationUsing the TransmitterFlowmeter Startup

5.3 Performing a loop test

A loop test is a means to:

• Verify that analog outputs (mA and frequency) are being sent by the transmitter and received

accurately by the receiving devices

• Determine whether or not you need to trim the mA outputs

• Select and verify the discrete output voltage

• Read the discrete input

Perform a loop test on all inputs and outputs available on your transmitter. Before performing the loop

tests, ensure that your transmitter terminals are configured for the input/outputs that will be used in

your application (see Section 6.3).

You can perform a loop test with the display, with ProLink II, or the Communicator.

5.3.1 Loop testing with the display

See Figure 5-2 for the loop test procedure. Not all options are available on all

transmitters.

Note the following:

• The display cannot be used to test the discrete input. If your transmitter has a discrete input,

use ProLink II or a Communicator to perform the discrete input loop test.

• The mA reading does not need to be exact. You will correct differences when you trim the mA

output. See Section 5.4.

• While the output is fixed:

- Dots traverse the top line of the display.

- The status LED blinks yellow.

• When the output is unfixed:

- The dots disappear.

- The status LED returns to the state it was in before the output was fixed.

• Model 1700 AN

• Model 1700 IS

• Model 2700 AN

• Model 2700 IS

• Model 2700 CIO

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Emerson MICRO MOTION 2700 Manuel d'installation Page 41