Micro Motion RFT9709 Manuál s instrukcemi stáhnout pdf (Strana 129)

Using ProLink

Software with Micro Motion

Transmitters

115

Configure Menu: Transmitter Outputs

continued

Fault indicators for RFT9739

Configure Menu:

Transmitter Outputs

Configure Menu:

Transmitter Information

Configure Menu: EventsView Menu: Status

Configure Menu:

Characterize

Configure Menu:

Transmitter Variables

10.4 Fault indicators for

RFT9739

Fault indicators control milliamp outputs and the frequency/pulse output

when the RFT9739 cannot accurately measure process variables.

For Version 2 and earlier RFT9739 transmitters, fault indicators can be

configured using the ProLink program (see below). Later versions of the

RFT9739 require setting of hardware switches inside the transmitter.

See the instruction manual that was shipped with the transmitter.

To use fault indicators to troubleshoot the flowmeter, see

Section 7.2

(page 56).

Example:

Given

: Primary milliamp and frequency/pulse outputs indicate the

mass flow rate.

Problem

: To compensate for noise from a slow-acting valve,

approximately two seconds of damping need to be added to the

existing 0.8 second of internal damping on mass flow as indicated by

an RFT9739.

Solution

: Enter a value of 2.00 into the Damp text box under Milliamp 1.

The RFT9739 damps the frequency/pulse output at a filter coefficient

of 0.8 second. After rounding down to the nearest programmed

coefficient of the secondary filter, the RFT9739 damps the primary

milliamp output at approximately 0.8 + 1.6 seconds, or 2.4 seconds.

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Micro Motion RFT9709 Manuál s instrukcemi Strana 129