User Guide - Eurotherm Ltda

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nanodac RECORDER/CONTROLLER: USER GUIDE4.16.2 Configuration (Cont.)MAIN PARAMETERSProbe Type Select from a variety of probe manufacturers. The subsequent parameter list dependson which manufacturer is selected.Resolution Enter the number of decimal places to be used for the value displayGas Reference Reference value for the hydrogen concentration in the atmosphere.Rem Gas Ref Remote reference value for hydrogen concentration in the atmosphere. Allows hydrogenconcentration to be read from an external source.Rem Gas Enable ‘Yes’ allows remote gas measurement. ‘No’ uses the internal Gas Reference value.Working Gas Read only. Working Reference Gas valueMin Calc Temp* The minimum temperature in at which the calculation is valid.Oxygen Exp The exponent units of the log oxygen type calculation. valid entries -24 to +24.Tolerance Sooting tolerance multiplier. Allows the user to adjust the sensitivity of the Sootingalarm, in order to reduce the incidence of nuisance alarms.Process Factor Process factor defined by the probe manufacturer.Clean Frequency Allows the interval between probe cleaning cycles to be entered in hours and minutes.Clean Time Allows Probe clean time to be entered in hours and minutes.Min Rcov Time The minimum recovery time after purging in hours and minutes.Max Rcov Time The maximum recovery time after purging in hours and minutes.Temp Input* Zirconia probe temperature input valueTemp Offset* Allows a temperature offset to be entered for the probe.Probe Input Zirconia probe mV inputProbe mV Offset Allows an offset to be entered for the probe mV inputOxygenRead only. calculated oxygen valueCarbon Potential Read only. The calculated carbon potential.Dew PointRead only. The dew point value derived from temperature and remote gas reference inputs.Soot Alarm Read only. Sooting alarm. Active if sooting is likely to take place. The sensitivity of thealarm can be adjusted by using the ‘Tolerance’ parameter, above.Probe Fault ‘Yes’ indicates a sensor break.PV Frozen Read only. Parameter set to ‘Yes’ during Probe cleaning.Clean Valve Read only. Enable the Clean valve.Clean State Read only. The burn off state of the zirconia probe: ‘Waiting’, ‘Cleaning’ or ‘Recovering’.CleanProbe‘Yes’ = Initiate probe cleaning. ‘No’ = Do not clean probe.Time to Clean Read only. The time remaining, in hours and minutes until the next cleaning cycle isdue.Probe Status Read only. Current probe statusOKNormal workingmV Sensor Brk Probe input sensor breakTemp Sensor Brk Temperature input sensor breakMin Calc Temp Probe deterioratingBalance Integral This output goes ‘true’ when a step change in the output occurs, which requires an integralre-balance if the readings are used for PID control.Carb Act CO O2 The carbon activity for the surface gas reaction between Carbon monoxide (CO) andOxygen (O2)Probe State Read only. The current state of the probe. If ‘Measuring’, then the outputs are updated.For any other state (Clean, Clean Recovery, Test impedance, Impedance Recovery,Waiting), the outputs are not updated.Oxygen Type Oxygen equation being used.Page 152HA030554Issue 7 Nov 12
nanodac RECORDER/CONTROLLER: USER GUIDE4.16.2 Configuration (Cont.)GAS REFERENCES PARAMETERSCO LocalReference value for the carbon monoxide (CO) concentration in the atmosphere.CO Remote Remote reference value for the carbon monoxide concentration in the atmosphere. allowsthe value to be read remotely.CO Remote En ‘Yes’ allows remote CO measurement. ‘No’ uses the internal value.CO in Use The CO gas measurement value currently being used.H2 LocalReference value for the hydrogen (H) concentration in the atmosphere.H2 Remote Remote reference value for the hydrogen concentration in the atmosphere. allows thevalue to be read remotely.H2 Remote En ‘Yes’ allows remote H measurement. ‘No’ uses the internal value.H2 In UseThe H gas measurement value currently being used.CLEAN PARAMETERSClean FrequencyClean TimeMin Rcov TimeMax Rcov timeClean ValveClean ProbeTime to CleanClean EnableClean Max TempClean AbortClean Rcov TimeLast CleanClean Msg ResetProbe FaultCant CleanClean AbortClean TempAllows the interval between probe cleaning cycles to be entered in hours and minutes.Allows Probe clean time to be entered in hours and minutes.The minimum recovery time after purging in hours and minutes.The maximum recovery time after purging in hours and minutes.Read only. Enable the Clean valve.Initiate probe cleaningRead only. The time remaining, in hours and minutes until the next cleaning cycle isdue.Enable probe cleaningMaximum temperature for cleaning. If the temperature exceeds this value, cleaning isaborted.Abort probe cleaningThe time taken for the probe to recover to 95% of its original value after the last clean.If the last clean did not recover within the Max Rcov time, this value is set to 0.The mV output from the probe after the last clean.‘Yes’ clears cleaning related alarms‘Yes’ means that the probe failed to recover to 95% of its original output, following aclean,Conditions exist which prevent a clean cycle starting. Can be cleared using ‘Clean MsgReset’.A clean cycle was aborted. Can be cleared using ‘Clean Msg Reset’.A clean cycle was aborted because the temperature was too high. Can be cleared using‘Clean Msg Reset’.HA030554Issue 7 Nov 12Page 153
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User Guide - Eurotherm Ltda

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