Yokogawa ADMAG AXR Uživatelský manuál stáhnout pdf (Strana 146)

<11. MAINTENANCE>

11-6

IM 01E30D01-01EN

11.4 Adhesion diagnostic

function

Thelong-termmeasurementofadhesiveuids

mayadverselyaffecttheowmeasurementdue

to insulating materials adhering to the electrode,

which could cause the output vibration to increase

ormakeitimpossibletomeasuretheowrate.

This function checks the level of adhesion by

measuring the resistance value.

NOTE

Adhesion Diagnostic Function

• This function diagnose adhesion using

electrode resistance values.

• T

he result of adhesion diagnosis is displayed

at K12:Adh Measure Value.

• When “Adhesion check” has been set for

B41/H11:DisplaySelect2 or B42/H12:

Display Select 3, the diagnose adhesion

is indicated on the display unit using four

different levels.

• If the judgment value for Level 3 is

exceeded, a warning is displayed; and if

the value for Level 4 is exceeded, an alarm

or warning is displayed depending on the

setting condition at G29.

• Available conductivity for this function is

limited to:

Nominal size 25 mm or larger: 10 µS/cm

Make sure to use the adhesion diagnostic

function with the greater conductivity than

the above mentioned value.

IMPORTANT

• Parameters cannot be set during execution

(approximately 5 minutes).

• Adhesion diagnosis should only be carried

outwhentheuidvelocityiscompletelyzero

by closing the valve.

• Flow measurement is not performed during

execution. While adhesion diagnosis is being

carried out, normally a current of 4 mA is

output. When adhesion diagnosis is carried

out, change the control loop to the manual

moderst.

• Adhesion diagnosis cannot be carried out

while an alarm is occurring.

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