Micro Motion RFT9709 Manuál s instrukcemi stáhnout pdf (Strana 70)

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Software with Micro Motion

Transmitters

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Fault outputs

7.2 Fault outputs

If a flowmeter failure occurs, transmitters produce fault outputs. Model

RFT9739, IFT9701, IFT9703, RFT9712, and RFT9729, produce

downscale or upscale outputs to indicate a fault. In addition, a Version 2

or earlier RFT9739 also has last measured value and internal zero fault

levels.

• To set downscale or upscale fault output levels for a Version 3

RFT9739, an IFT9701, an IFT9703, an RFT9712, or an RFT9729,

refer to the transmitter instruction manual.

• To set fault levels for a Version 2 or earlier RFT9739, open the

Configure menu, then choose Transmitter Outputs.

RFT9739

• Downscale: milliamp outputs go to 0 mA if they produce a 0-20 mA

current, or to 0-2 mA if they produce a 4-20 mA current;

frequency/pulse output goes to 0 Hz.

• Upscale: milliamp outputs go to 22-24 mA; frequency/pulse output

goes to 15-19 kHz.

• Last measured value (not available with Version 3 transmitters):

Outputs hold the values measured immediately before the fault

condition occurred.

• Internal zero (not available with Version 3 transmitters): Outputs

indicate a value of zero for the represented process variable.

IFT9701/IFT9703

• Downscale: The milliamp output goes to 2 mA; the pulse output goes

to 0 Hz.

• Upscale: The milliamp output goes to 22 mA; the pulse output goes

to 7200 Hz for version 1.2 and higher or 1200 Hz for lower versions.

RFT9712/RFT9729

• Downscale: The milliamp output goes to 2 mA; the frequency/pulse

output goes to 0 Hz.

• Upscale: The milliamp output goes to 22 mA; the frequency/pulse

output goes to 11,520 Hz.

7.3 Critical indicators

Critical indicators switch ON under the following conditions:

• Master reset defaults in transmitter software

• Transmitter failure

• Flow, temperature, or density outside sensor limits

• Faulty flowmeter wiring, cable, or connections

• Inappropriate density calibration factors

• Plugged or partially plugged flow tubes

• Loss of input signal (when pressure is enabled)

• Temperature calibration failed (RFT9712 and RFT9729 only)

• Data loss during configuration

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