Emerson MICRO MOTION 2700 Manual de instalación descargar pdf (Pagina 100)

90 Transmitter Configuration and Use: Series 1000 and 2000 Transmitters

Optional Configuration continued

Example 1

Configuration:

• Flow direction = Forward only

• mA output: 4 mA = 0 g/s; 20 mA = 100 g/s

(See the first graph in Figure 8-1.)

As a result:

• Under conditions of reverse flow or zero flow, the mA output level

is 4 mA.

• Under conditions of forward flow, up to a flow rate of 100 g/s, the

mA output level varies between 4 mA and 20 mA in proportion to

(the absolute value of) the flow rate.

• Under conditions of forward flow, if (the absolute value of) the flow

rate equals or exceeds 100 g/s, the mA output will be proportional

to the flow rate up to 20.5 mA, and will be level at 20.5 mA at

higher flow rates.

Example 2

Configuration:

• Flow direction = Reverse only

• mA output: 4 mA = 0 g/s; 20 mA = 100 g/s

(See the second graph in Figure 8-1.)

As a result:

• Under conditions of forward flow or zero flow, the mA output level

is 4 mA.

• Under conditions of reverse flow, up to a flow rate of 100 g/s, the

mA output level varies between 4 mA and 20 mA in proportion to

the absolute value of the flow rate.

• Under conditions of reverse flow, if the absolute value of the flow

rate equals or exceeds 100 g/s, the mA output will be proportional

to the absolute value of the flow rate up to 20.5 mA, and will be

level at 20.5 mA at higher absolute values.

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Emerson MICRO MOTION 2700 Manual de instalación Pagina 100