Emerson MICRO MOTION 2700 Instrukcja Instalacji Pobierz pdf (Strona 45)

Transmitter Configuration and Use: Series 1000 and 2000 Transmitters 35

Flowmeter Startup continued

Required Configuration Optional ConfigurationUsing the TransmitterFlowmeter Startup

5.4 Trimming the milliamp outputs

Trimming the mA output creates a common measurement range between the transmitter and the device

that receives the mA output. For example, a transmitter might send a 4 mA signal that the receiving

device reports incorrectly as 3.8 mA. If the transmitter output is trimmed correctly, it will send a

signal appropriately compensated to ensure that the receiving device actually indicates a 4 mA signal.

You must trim the mA output at both the 4 mA and 20 mA points to ensure appropriate compensation

across the entire output range.

Perform a milliamp trim on all mA outputs available on your transmitter. Before performing the trim,

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

application (see Section 6.3).

You can trim the outputs with ProLink II or a Communicator.

5.4.1 Milliamp output trim with ProLink II

See Figure 5-5 for the mA output trim procedure.

Note the following:

• If you are trimming the primary mA output, and you are connected to the

transmitter via HART/Bell202, the HART/Bell202 signal to ProLink II will

affect the reading. Disconnect ProLink II before reading the output, then

reconnect and resume the trim, after taking the reading. If you are using any

other protocol, this is not required.

• Any trimming performed on the output should not exceed ± 200 microamps.

If more trimming is required, contact Micro Motion customer support.

• Model 1500 AN

• Model 1700 AN

• Model 1700 IS

• Model 2500 CIO

• Model 2700 AN

• Model 2700 IS

• Model 2700 CIO

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Emerson MICRO MOTION 2700 Instrukcja Instalacji Strona 45