Micro Motion RFT9709 Manual de instrucciones descargar pdf (Pagina 76)

Using ProLink

Software with Micro Motion

Transmitters

View Menu: Status

continued

Operational indicators

"Analog Input Error" and

"Pressure Input Failure"

Analog Input Error applies only to versions 2.0 and higher RFT9739

transmitters. Analog Input Error switches ON when the pressure input to

the RFT9739 is less than 4 mA or greater than 20 mA, and indicates one

of the following conditions:

• Faulty wiring between a pressure transmitter and the RFT9739

• Pressure input requires characterization

Pressure Input Failure applies only to RFT9739 transmitters with

software versions 2.3 and higher. Pressure Input Failure switches ON to

indicate a loss of either the analog input signal, as above, or the HART

signal.

If Analog Input Error or the Pressure Input Failure switches ON:

• Characterize range limits for milliamp input

• Check for faulty wiring to or from pressure transmitter

• Alter fluid process

"Data Loss Possible"

Data Loss Possible switches ON when a power fluctuation occurs during

transmitter configuration, to indicate the last configuration parameters

might not have been saved.

If Data Loss Possible switches ON, open the appropriate configuration

window and check the last parameters that were entered. Re-enter any

parameters that are not correct.

7.4 Operational indicators

Operational indicators switch ON to indicate the following conditions:

• The process is operating outside control limits.

• The transmitter cannot properly calculate settings during a

calibration procedure.

• Inappropriate measurement units or inappropriate limits on output

variables are driving outputs to their limits.

• The transmitter cannot calculate the flow rate.

Table 7-7

summarizes conditions indicated by operational indicators,

and lists appropriate corrective actions.

"Calibration Failure"

Calibration Failure switches ON if the transmitter cannot properly

calculate settings during a calibration procedure. The cause of the

failure depends on the type of calibration that is being performed:

• During auto zero, failure can occur due to mechanical noise from an

external source or due to flow of fluid through the sensor.

• During a two-point density calibration, failure can occur due to use of

a low-density fluid that is too dense, a high-density fluid that is not

sufficiently dense, or mechanical noise from an external source.

For more information about flowmeter calibration, see

Chapter 14

(page

133).

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