Emerson 54e pH/ORP Diagnostics, Autocal Standard, Stabilize pH 0.01 pH Stabilize time 10 sec

Page 49

MODEL 54e pH/ORP

SECTION 5.0

 

SOFTWARE CONFIGURATION

5.8 ON-LINE DIAGNOSTICS SETUP (continued)

"Cal warn" compares the on-line glass impedance with the value meas- ured at the last buffer calibration. This setting should be set to 0 (dis- abled).

"Imped comp" is used to compensate the glass impedance for tempera- ture changes. This is especially important at temperature extremes.

NOTE

The actual on-line values of the sensor diagnostics are available on the controller under the "Diagnostic Variables" header in the main menu (regardless of whether the messages have been turned on in this section).

5.9 AUTO CALIBRATION SETUP

 

 

 

 

This section describes how the controller may be set up for auto calibra-

 

Diagnostics

 

tion, which includes automatic buffer recognition and auto stabilization.

 

 

Alternatively, the controller may be configured to perform a manual cali-

 

Auto Calibration

 

 

 

 

 

bration without the automatic features.

 

Security

 

1. Beginning from the main menu, move the cursor down to "Program"

 

 

and press Enter (F4). From the program menu, move the cursor

 

 

 

 

 

Exit

Enter

down using the arrow key to highlight "Configure" and press Enter

 

(F4).

 

 

 

 

 

 

 

 

Use the arrow key again to highlight "Auto Calibration" (as shown on

 

 

 

 

the left) and press Enter (F4).

 

 

 

 

NOTE

 

 

 

 

There are three buffer groups that may be selected. Automatic

 

 

 

 

buffer recognition includes temperature curves from 0 to 60°C.

 

 

 

 

a. Standard: Includes NIST (US), BSM (Britain), JIS 8802 (Japan) and

 

 

 

 

DIN 19266 (Germany) buffers. See Table 5-2 for details.

 

 

 

 

b. DIN 19267: 1.09/4.65/6.79/9.23/12.75

 

 

 

 

c. Manual: (for manual calibration) disables automatic buffer recognition

 

 

 

 

and stabilization.

 

 

 

 

 

Autocal: Standard

Stabilize pH: 0.01 pH

Stabilize time: 10 sec

ExitEdit

2.

Menu Item

Options

 

 

 

 

Autocal

Standard/ DIN 19267/ Manual

 

 

 

 

Stabilize pH

0.01-0.50 pH

 

 

 

 

Stabilize time

0-30 sec

 

 

 

The values now being used by the controller are displayed. To change any of these items, use the arrow key to highlight the desired item and press Edit(F4). Use the arrow keys to make the change and press Save (F4) to enter the change into memory.

The pH reading must not change by more than the stabilize pH value over the stabilize time to be considered stable. Using a smaller pH value and a larger time provides the best protection against calibration while the reading is still changing.

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Contents Model 54e pH/ORP PH/ORP Hart Analyzer/ControllerElectrical Shock Hazard Essential InstructionsPage Model 54E PH/ORP Microprocessor Analyzer Description and SpecificationsSection Title List of Tables Appendix TitleTable No Title About This Document Table of Contents List of FiguresGeneral Description Section Description and SpecificationsDescription of Controls Power Specifications Physical Specifications GeneralRelative Humidity 95%, non condensing Alarms Current OutputsRecommended Sensors Analyzer Specifications @ 25CCode Options Ordering InformationPart NO. Description Mechanical Installation Section InstallationLocating the Controller Unpacking and InspectionPanel Mounting Power Input Wiring Section WiringAnalog Output Wiring Alarm Relay Output Wiring454EPH02 PH Sensor Compatibility PH Sensor WiringTions will Result in Controller MALFUNC- Tion 454EPH01 Cable Dressing Final Electrical Check Wiring to Model Introduction Section CalibrationAdjust temp 25.1 C Hold Mode OffTemperature Calibration Buffer 1 -- Wait Autocal bufferAutomatic TWO-POINT Calibration Use the arrow keys to select the correct buffer Auto buffer cal doneCalibration Notes Pt 04.00pH 25C Calibrate pointPt calibration done Manual TWO-POINT CalibrationSINGLE-POINT pH Calibration Standardize 7.01 pHTemp comp Auto Temperature Compensation OptionsOutput trim 59.16 mV/pHOutput trim Hold ModeTrim Outputs PH Settings List Section Software ConfigurationRanges Factory Settings User Settings Diagnostics Section Outline of Menu Levels Changing Alarm Setpoints Alarm High 14.00pHSimulate tests Setpoint 07.00 pH4mA 0.00 pH 20mA 2.00 pH Setpoint 7.00 pHSetpoint + 06.90 pH Changing Output Setpoints PID onlyOutput OutputMA 0.00 pH 20 mA 14.00 pH Output 1 12.00 mA MA +00.00 pHTest output Test alarm Alarm setpoints Output setpointsTesting Outputs and Alarms Simulated testsTest alarm 1 Open Test alarm 1 OpenMeasure pH Display right AL2Security Caution Display contrast Timeout OnDisplay Control ModeChanging Output Parameters Output Control ParametersRange 4-20 mAl Fault 22.00 mARange 4-20 mA Output 2 control Output 2 setup Fault 22.00mAHold feature setup Hold Disable featureAlarm 3 control AlarmsInterval timer Setpoint 0.01 pH Delay 0 sec Alarm LowHysteresis 0.01 pH Delay 0 sec Relay Default NoneSetpoint +07.00 pH Relay default NoneTime period 30 sec URV 2.00 pHFeed limit Disable Alarm FaultTimeout 3600 sec Alarm 4 SetupRecovery 600 sec Timer DisableOn time 120 sec Interval Timer Examples Diagnostics Off DiagnosticsZero offset 60 mV Auto Calibration Setup DiagnosticsAutocal Standard Stabilize pH 0.01 pH Stabilize time 10 secStandard Buffers Auto Calibration SetupSection Theory of Operation Continuous Sensor DiagnosticsTypical set points Interval TimerSee .8 for instructions on chang- ing these setpoints Time Proportional Control TPC Mode Code Alarm RelaysAnalog Outputs Normal ModeController Mode Priority Chart Controller Mode PriorityCondition Definitions Action DefinitionsPID Control Code PID Control Mode CombinationsPID Control Measurement and Set Point Feedback ControlProportional Gain Plus Integral Reset Proportional Mode GainControl Loop Adjustment and Tuning Process Reaction Curve Process Reaction Curve MethodPID Control Password Protection Section Special Procedures and FeaturesLevel 1 3 Password Privileges Security Configuring SecurityCustom Curve Lock allTemp coeff +.000 Solution Temperature CompensationSensor iso 07.00 pH Operate iso +07.00 pH Troubleshooting is easy as 1, 2, 3… Section TroubleshootingDiagnostic Messages Description of problem Diagnostic MessagesSymptom Action Quick Troubleshooting GuideDiagnostic Variables Theoretical pH vs. Millivolt Values at 25C 77F Temperature Compensation Circuit Troubleshooting GuidelinesTroubleshooting Procedure Ohms Ambient TemperaturePreamp in a junction box Figure Preamplifier Troubleshooting ProcedureController preamp check Figure Junction Box Preamplifier Check No Power Troubleshooting GuideCoated glass electrode Clean with soft cloth and clean water Password protected Part Number Description Replacement PartsNON-WARRANTY Repair Warranty RepairSection Return of Material GeneralQuick Startup ORP Appendix a ORP ConfigurationItem Choices ORP Settings User Settings Table A-1. ORP Settings ListDiagnostics Section Choices ORP Settings User SettingsSimulated tests Output setpointsORP Calibration Standardize 400 mVSensor or Circuit Board only Return of Materials RequestReturn of Material WarrantySpecifications subject to change without notice
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