Micro Motion RFT9709 Manual de instrucciones descargar pdf (Pagina 123)

Using ProLink

Software with Micro Motion

Transmitters

109

Configure Menu: Transmitter Outputs

continued

Frequency/pulse output

Configure Menu:

Transmitter Outputs

Configure Menu:

Transmitter Information

Configure Menu: EventsView Menu: Status

Configure Menu:

Characterize

Configure Menu:

Transmitter Variables

RFT9739 outputs

The RFT9739 has two milliamp outputs, a frequency/pulse output, a

control output, fault indicators, and a slug duration.

• Primary and secondary milliamp outputs can produce a 0-20 or

4-20 mA current. Milliamp outputs can independently indicate mass

flow, volume flow, density, temperature, differential pressure,

viscosity, event 1 status or event 2 status.

• The frequency/pulse output can indicate mass flow rate, mass flow

total, volume flow rate, or volume flow total.

• The 0/15 V control output can indicate forward or reverse flow;

transmitter zeroing in progress; any fault indication; event 1 status or

event 2 status.

• Outputs can produce upscale or downscale fault indicators. Most

RFT9739 can also produce internal zero or last measured value fault

indicators.

• The slug duration is a set period of time during which flow outputs

hold their last measured value after density goes outside a slug flow

limit.

Assigning a process event to an RFT9739 output changes the function

of the output, and changes the procedure for configuring the output. To

assign an event to an output, see

Chapter 12

IFT9701/IFT9703 outputs

The IFT9701 and the IFT9703 have a 4-20 mA output and a pulse

output:

• The milliamp output can indicate mass or volume flow rate.

• The pulse output can indicate mass or volume flow rate.

RFT9712/RFT9729 outputs

The RFT9712 and RFT9729 have a 4-20 mA output, a frequency/pulse

output, and a flow direction output:

• The milliamp output can indicate flow, density, or temperature.

• The frequency/pulse output can indicate mass flow rate or volume

flow rate.

• The 0/15 V flow direction output can indicate forward or reverse flow.

10.2 Frequency/pulse output

The frequency/pulse output goes to any frequency-based totalizer or

flow computer.

The output requires frequency/flow rate scaling when indicating flow

rate, or number of pulses per flow total when indicating the flow total.

The K-factor indicates the number of pulses per unit of flow. Regardless

of the scaling, the frequency is always proportional to the flow rate.

For the RFT9739:

• The pulse width is programmable for low frequencies.

• A process variable (mass or volume) can be assigned to the

frequency/pulse output. The frequency or number of pulses is always

proportional to a flow rate, regardless of the assigned process

variable. The output for each variable is described in

Table 10-1

1 2 ... 118 119 120 121 122 123 124 125 126 127 128 ... 213 214

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Micro Motion RFT9709 Manual de instrucciones Pagina 123

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