Emerson MICRO MOTION 2700 Installationshandbuch PDF herunterladen (Seite 98)

88 Transmitter Configuration and Use: Series 1000 and 2000 Transmitters

Optional Configuration continued

Note: Most users should select the Normal update rate. Use the Special update rate only if required

by your application. Contact Micro Motion before setting the update rate to Special.

Note: If you change the update rate, the setting for damping is automatically adjusted. See

Section 8.7.3.

8.9 Configuring the flow direction parameter

The flow direction parameter controls how the transmitter reports flow rate and how

flow is added to or subtracted from the totalizers, under conditions of forward flow,

reverse flow, or zero flow.

• Forward (positive) flow moves in the direction of the arrow on the sensor.

• Reverse (negative) flow moves in the direction opposite of the arrow on the

sensor.

Options for flow direction include:

• Forward only

•Reverse only

• Absolute value

• Bidirectional

• Negate/Forward only (Model 1500/2500 transmitters only)

• Negate/Absolute value (Model 1500/2500 transmitters only)

For the effect of flow direction on mA outputs:

• See Figure 8-1 if the 4 mA value of the mA output is set to 0.

• See Figure 8-2 if the 4 mA value of the mA output is set to a negative value.

For a discussion of these figures, see the examples following the figures.

For the effect of flow direction on frequency outputs, totalizers, and flow values reported via digital

communication, see Table 8-6.

• 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 Installationshandbuch Seite 98