Yokogawa ISC450 4-Wire Analyzer for Inductive Conductivity Manual de usuario descargar pdf (Pagina 10)

IM 12D06D05-01E

2. GENERAL SPECIFICATIONS OF EXAxt ISC450G

A) Input specifications :CompatiblewiththeYokogawainductiveconductivityISC40serieswith

integrated temperature sensor: NTC30k or Pt1000

B) Input range

 Conductivity : 0to1999mS/cmat25°C(77°F)referencetemperature

 Minimum : 1µS/cm(atprocesstemperature)

 Maximum : 2S/cm(atprocesstemperature)

 Temperature : -20to+140ºC(0to280ºF)

Cable length : max. 60 metres (200 feet)

10 metres (35 feet) fixed sensor cable + 50 metres (165 feet)

WF10extensioncable.Influenceofcablecanbeadjustedbydoing

anAIRCALwiththecableconnectedtoadrycell

C) Accuracy (under reference conditions):

 Conductivity : ≤0.5%ofreading±1.0µS/cm

 Temperature : ≤0.3ºC(0.6ºF)

 Temp.compensation: ≤1%forNaCl,≤3%forMatrix

 Stepresponse : ≤4secondsfor90%(fora2decadestep)

Note on performance specifications

The following tolerance is added to above performance.

 mAoutputtolerance:±0.02mAof“4-20mA“

D) Transmission signals

 General : Twoisolatedoutputsof4-20mA.DCwithcommonnegative.Maximum

load600Ω.Bi-directionalHART

digital communication, superimposed

onmA1(4-20mA)signal.

 Outputfunction : Linearor21-steptableforConductivity,ConcentrationorTemperature.

Control function : PID control.

 Burnoutfunction : Burnup(21.0mA)orburndown(3.6mA)tosignalfailure.acc.

NAMURNE43.

Parameters : Adjustable damping

: Expire time

Hold : The mA-outputs are frozen to the last/fixed value during calibration/

commissioning

 Cond.range : minspan10µs/cm≥10%ofhighvalve(20mA)

maxspan1999mS/cm

E) Contact outputs

 General : FourSPDTrelaycontactswithdisplayindicators

 Switchcapacity : Maximumvalues100VA,250VAC,5Amps.(*)

Maximumvalues50Watts,250VDC,5Amps.(*)

 Status : High/Lowprocessalarms,selectedfromconductivity,concentrationor

temperature. Configurable delay time and hysteresis

: PID duty cycle or pulsed frequency control

  : FAILalarm

 Controlfunction : On/Off

: Adjustable damping

: Expire time

1 2 ... 5 6 7 8 9 10 11 12 13 14 15 ... 68 69

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Yokogawa ISC450 4-Wire Analyzer for Inductive Conductivity Manual de usuario Pagina 10

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