Marathon Computer AACC 2000 manual User calibration

Page 85

Marathon Monitors Inc.

User calibration

This chapter has five topics:

∙WHAT IS THE PURPOSE OF USER CALIBRATION?

∙USER CALIBRATION ENABLE

∙OFFSET CALIBRATION

∙TWO POINT CALIBRATION

∙CALIBRATION POINTS AND CALIBRATION OFFSETS

To understand how to select and change parameters in this chapter you will need to have read Chapter 2 - Operation, Chapter 3- Access Levels and Chapter 6 - Configuration.

WHAT IS THE PURPOSE OF USER CALIBRATION?

The basic calibration of the controller is highly stable and set for life. User calibration allows you to offset the ‘permanent’ factory calibration to either:

1.Calibrate the controller to the your reference standards.

2.Match the calibration of the controller to that of a particular transducer or sensor input.

3.Calibrate the controller to suit the characteristics of a particular installation.

4.Remove long term drift in the factory set calibration.

User calibration works by introducing a single point, or two-point, offset onto the factory set calibration.

AACC 2000 Carbon

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Nov. 1, 1997

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Contents Copyright Marathon Monitors INC Marathon Monitors Inc Mechanical Installation Electrostatic discharge precautions SafetyCleaning Electromagnetic compatibilityWiring Safety SymbolsPower Isolation PersonnelOvercurrent protection Over-temperature protectionVoltage rating Conductive pollutionGrounding of the temperature sensor shield Installation requirements for EMCRouting of wires Equipment ratings Environmental ratingsGeneral Electrical safetyMarathon Monitors Inc Installation Outline dimensions Model 2000 controller Outline dimensions ModelIntroduction To install the controllerController labels Unplugging and plugging-in the controllerModel Aacc 2000 rear terminal layout Rear terminal layoutsMarathon Monitors Inc Module 1, 2 Sensor input connectionsSnubbers Two terminal modulesCOM Four terminal modulesDual output modules Connections for Process Value 2 PV2 Connections for Process Value 3 in module positionCommunication module EIA-485 wiring Wiring of 2-wire EIA-485 serial communications linkMarathon Monitors Inc Operation Front Panel LAYOUTs 26.0OP1 Button or Name ExplanationOP2 SP2Basic operation AlarmsOperating modes Output power demand Automatic modeHome display Display unitsSetpoint Manual ModeList header displays Parameters and HOW to Access ThemMarathon Monitors Inc Parameter displays Parameter namesTo change the value of a parameter 1OFF ListOFF PID.1 PIDSTD FactPass Millivolt input Offset Name Description Prob Probe list Process FactorHydrogen or CO constant Name Description DrA TunEDrA.t AdcSEt Pid PID listRES HcbInput list Setpoint listCmS Comms list Output listInFo Information list FF.OP Access ListAlarms Display What it means What to do about it Shows Diagnostic alarms2b Diagnostic alarms Access Levels Password entry Access list headerAccess to Read-only Configuration Configuration level Configuration passwordLevel selection Edit level Setting operator access to a parameterReturning to Operator Level Hiding or revealing a complete listPromoting a parameter This sheet intentionally left blank Parameter Code Meaning or Function TuningHow to tune One-shot TuningCalculation of the cutback values Typical automatic tuning cycleAdaptive tune Manual Tuning Proceed as follows Setting the cutback valuesAutomatic droop compensation Adc Integral action and manual resetMotorized valve control Name Description Values Mtr Motor list Min Max DefaultInertia and backlash settings Adjusting the minimum on-time ‘mp.t’Marathon Monitors Inc Gain scheduling Enable in configuration levelSet the transfer point Configuration Press to enter configuration Selecting configuration levelChanging the passwords Leaving Configuration LevelLIN REUD1SA Enab SB.OPCMS RelyNone YES DIGPMV Name Description Values Meaning InSt Instrument configurationH2O SP.FFInput configuration Process value configCJC VAL.L Setpoint configurationVAL.H Table a Alarm types Value Alarm configuration ValuesAlarm Modes Digital input 2 configuration Action on contact closure Digital input 1 configuration Action on contact closureIMP Vflt Alarm relay configurationPflt Combining several digital events on to one output Comms 1 module config1A b C1 Module 1 configuration Module configCool For ‘id’ = ‘LoG.i’ i.e logic input use the LA Conf’ list on 2A/b/C Module 2 configurationDisplayed value low SEL 3A/b/C Module 3 configurationModule configuration C Module configurationVAL.1 Point Custom LinearisationVAL.8 CAL Exit Exit configuration Password configurationDC Output Calibration User calibrationUser calibration Calibration Configuration List User Calibration EnableUser Calibration Enable Exit configurationInput list header Offset calibrationCalibration type Set Offset See table on the right for additional parametersDisplayed Value Two-point calibrationSelect Low-point Calibration Adjust low-point calibrationSelect High-point Calibration Adjust High-point CalibrationName Parameter description Meaning Calibration points and Calibration offsetsParameter Table Default HY1 Ssel FLT3 Marathon Monitors Inc AL1 Module 2A High Value VAL.1 101 Index Two-point calibration User calibration Aacc 2000 Carbon