Flowserve ValveSight Diagnostics User Manual

Page 56

ValveSight Diagnostics for HART User Manual FCD VSENSF0001-02-AQ 03/15

Indicator

Implications

Possible

Solutions

Default

Settings

Enable/

Disable

Refer to

DTM

Screen

Blink

Code

Pressure

Port 2

Range

Small

Warning

Indicates that during a pressure sensor cali-

bration, the range of applied pressures to Port

2 was too small for optimum performance.

Adjust the supply pressure to a

higher value so the positioner

can properly span the sensors,

then recalibrate. Briefly push

the QUICK-CAL button to

acknowledge this condition

and the positioner will operate

using the current short stroke

calibration values, if valid.

N/A

Calibration

> Actuator/

Stroke/Fric-

tion

YYGY

Pneumatic

Leak

Warning

Indicates that the positioner has detected a

leak in the actuation assembly. Leakage from

the actuator can cause decreased responsive-

ness and excessive air/gas consumption. Low

supply pressure can also trigger this warning.

Repair pneumatic leaks at the

tubing junctions and actuator

seals. Ensure proper supply

pressure.

Start:

0.3 scfm

End:

0.7 scfm

Yes

Health >

Actuator

Health

YRGR

Pilot Relay

Response

Warning

Indicates that the pilot relay is sticking or

slow to respond. This affects the responsive-

ness, increases the chance of limit cycling

and excessive air consumption. The pilot relay

is part of the inner loop and consists of the

driver module assembly with piezo (I-P relay)

which is coupled to the pilot valve. The value

of this indicator corresponds with inner loop

lag. Delayed response can be caused by a par-

tially clogged piezo or debris, oil, corrosion,

ice, or low supply pressure.

Check response of the valve. If

it’s OK, adjust the Pilot Relay

Response limits. Check the

spool for debris, oil, corrosion,

and ice on the spool. Clean or

replace the spool assembly.

Replace the piezo or drive

module assembly. Maintain a

clean, water-free air/gas supply.

300 ms

Yes

Health >

Positioner

Health

YRGG

Pilot Relay

Response

Alarm

Indicates that the pilot relay is sticking or

extremely slow to respond. This affects the

responsiveness, increases the chance of limit

cycling and excessive air consumption. The

pilot relay consists of the driver module as-

sembly with piezo (I-P relay) which is coupled

to the pilot valve. Delayed response can be

caused by a partially clogged piezo or debris,

oil, corrosion, ice, or low supply pressure.

Check response of the valve. If

it’s OK, adjust the Pilot Relay

Response limits. Check the

supply pressure. Check the

spool for debris, oil, corrosion,

and ice on the spool. Clean or

replace the spool assembly.

Maintain a clean, water-free air/

gas supply.

700 ms

Yes

Health >

Positioner

Health

RRGG

Pilot Relay

Cycles Limit

Alert

Indicates the pilot relay cycle limit set by the

user has been exceeded. The pilot relay cycles

indicate the activity level of the pilot relay as it

maintains a valve’s position. Excessive cycles

can contribute to a worn pilot relay which can

lead to high air consumption.

Inspect for high air consump-

tion and signs of wear.

Start:

45,000,000

End:

50,000,000

Deadband:

.5%

Yes

Health >

Positioner

Health

GRGG

Pilot Relay

Travel Limit

Alert

Indicates the total accumulated pilot relay

travel (% of full pilot relay span) set by the

user has been exceeded. The pilot relay travel

indicates the activity level of the pilot relay

as it maintains a valve’s position. Excessive

travel can contribute to a worn pilot relay

which can lead to a high air consumption.

Inspect for high air consump-

tion and signs of wear.

Start:

360,000,000

End:

400,000,000

Deadband:

.5%

Yes

Health >

Positioner

Health

GRGG

Hall Sensor

Upper

Position

Alarm

Indicates the pilot relay (spool or poppet)

appears to be unable to move in the upper

(pressurized) direction and is not responding.

This could be due to low supply pressure, a

hall sensor that is out of calibration, a broken

piezo, stuck relay, or a wire connection

problem.

Check for adequate supply

pressure. A hall sensor prob-

lem may be cleared by briefly

pushing the QUICK-CAL button,

which will force the positioner

to use the parameters from

the last valid calibration. Check

the internal wiring harnesses

for good connections. Check

the spool valve for sticking

problems. If the positioner still

does not operate, replace the

piezo, driver module assembly,

and/or spool assembly.

N/A

Yes

N/A

RRYR