Yokogawa ISC450 4-Wire Analyzer for Inductive Conductivity Manual do Utilizador descarregar pdf (Página 36)

IM 12D06D05-01E

5-8. Fail

A fail contact is energized when a fail situation

occurs.Failsituationsareconfiguredinsecton

5-11.ForSOFTFailsthecontactandthedis-

playonLCDarepulsating.ForHARDFailsthe

contactandthedisplayonLCDareenergized

continuously.

Hard fail only

ThecontactreactstoHardFailsOnly

Hard + soft fail

ThecontactreactstoHardandSoftFails

OnlycontactS4isprogrammedasafail-safe

contact.ThismeansthatcontactS4wilbe

de-energized when a fail situation occurs.

5-9. Simulate

The contact can be switched on/off or a

percentageofoutputcanbesimulated.On/Off

enables the user to manually switch a contact

on or off. The percentage is an analogue value

and represents the on time per period.

TheDutycydePeriodtime(seefigure5-4)is

used as a period for percentage simulation.

Note that the (simulated) settings of the con-

tacts become visible in measuring mode and

afterHOLDhasendedc.q.hasbeenoverruled.

A warning is activated in case of a simulated

output contact.

5-10. Input contacts

TheterminaloftheISC450Gprovidesforanin-

putcontact(seeFigure3-7).Thisinputcontact

can be used to switch the range of the outputs.

The range can be increased by 1 decade.

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Yokogawa ISC450 4-Wire Analyzer for Inductive Conductivity Manual do Utilizador Página 36