Emerson PN 51-1055pHC/rev.K instruction manual General, Preamplifier is in the Sensor

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FIGURE 8-2. Simulating Inputs When the Preamplifier is in the Analyzer

MODEL SOLU COMP II

SECTION 8.0

 

TROUBLESHOOTING

8.6 SIMULATING INPUTS — pH

8.6.1 General

This section describes how to simulate a pH input into the Solu Comp analyzer. To simulate a pH measurement, connect a standard millivolt source to the transmitter. If the transmitter is working properly, it will accurately meas- ure the input voltage and convert it to pH. Although the general procedure is the same, the wiring details depend on the location of the preamplifier.

8.6.2 Simulating pH input when the preamplifier is in the analyzer.

1.Turn off automatic temperature correction and solution tempera- ture correction. From the Program menu, choose Temp. Then choose Live/Manual and enter 25°C. See Section 5.6 for details.

2.Disconnect the sensor and connect a jumper wire between termi- nals 1 and 6 and terminals 4 and 6 on TB4. See Figure 8-2.

3.From the display menu choose the pH/temperature/mV screen. The measured voltage should be 0 mV and the pH should be 7.00. Because calibration data stored in the analyzer may be off- setting the input voltage, the displayed pH may not be exactly

7.00.

4. If a standard millivolt source is available, disconnect the jumper wire between terminals 1 and 6 and connect the voltage source

as shown in Figure 8-2. Be sure to jumper the reference and solution ground terminals.

5.Calibrate the analyzer using the procedure in Section 6.3. Use 0.0 mV for Buffer 1 (pH 7.00) and -177.4 mV for Buffer 2 (pH 10.00). If the analyzer is working properly it should accept the calibration. The slope should be 59.16 mV/pH and the offset should be zero.

6.To check linearity, return to the main display and the pH/temperature/mV screen. Set the voltage source to the values shown in the table and verify that the pH and millivolt readings match the values in the table.

 

Voltage (mV)

pH (at 25°)

 

 

295.8

2.00

 

 

177.5

4.00

 

 

59.2

6.00

 

 

-59.2

8.00

 

 

-177.5

10.00

 

 

-295.8

12.00

 

 

 

 

 

8.6.3Simulating pH input when the preamplifier is in a junction box.

The procedure is the same as described in Section 8.6.2.

 

Keep the connections between the analyzer and the junction

 

box in place. Disconnect the sensor at the sensor side of the

 

junction box and connect the voltage source as shown in

 

Figure 8-3.

FIGURE 8-3. Simulating pH Input When the

 

Preamplifier is in the Sensor.

8.6.4 Simulating pH input when the preamplifier is in the sensor.

The preamplifier in the sensor simply converts the high impedance signal into a low impedance signal without amplifying it. To simulate pH values, follow the procedure in Section 8.6.2.

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Contents Model Solu Comp Essential Instructions Quick Start Guide ORP Quick Reference Guide Model Solu Comp List of Tables Table of Contents CONT’DIii List of FiguresAbout This Document Section Description and Specifications Terminal Connections Rating 26-14 AWG wire size DimensionsHazardous Location Ordinary Location -68 onlyAnalyzer Conductivity Input Performance SpecificationsRecommended Sensors for Conductivity Range, µS/cm Cell constant, /cmMeasurement Range see table below Toroidal Conductivity Codes -21 and/orTemperature Correction none required Performance Specifications Analyzer ORP InputWhen used with conductivity -20-32 or Recommended Sensors for ORPRecommended Sensors Frequency Range 0.5 4000 HzRepeatability ±1% Recommended Sensor Loop Specifications with a Model 499A OZ SensorInput filter 1- 255 samples Measurement Range 0-10 ppm mg/LModel 1055 Solu Comp II Analyzer Ordering InformationCombination Guide Part Number Description Weight Installation Section InstallationUnpacking and Inspection General InformationPanel Mounting Panel Mount InstallationPipe Mounting Pipe Mount InstallationSurface Mounting Surface Mount InstallationSection Wiring POWER, ALARM, OUTPUT, and Sensor ConnectionsPreparing Conduit Openings Model Solu Comp Section Wiring Model Solu Comp Section Wiring 41055105 41055106 41055107 41055108 41055109 41055110 40105536 40105559 Section Display and Operation DisplayKeypad Programming and Calibrating the Solu Comp II Tutorial Security Using HoldSection Programming the Analyzer Output Dampening Or 4 mA Mode Section Default SettingsAlarm Section Sensors Output SectionDefault Settings Assigning Outputs 1 DefinitionsChoose Output1 or Output2 Choose Output ConfigureChoose 4-20 mA or 0-20 mA Choose Output Range. Choose Output1 or Output2Alarm Relays Must be Configured Before Assigning Setpoints Choose Measurement or Temp Choose Alarm ConfigureChoose Alarm Setpoints Definitions pH/ORP Definitions conductivity/resistivity Choose Soln Temp Corr or Sensor Isoptntl Choose MeasurementDefinitions pH OutputsAlarms Measurement Choose Noise Rejection Choose ResetAnalyzer Choose Default Display Procedure Choosing a LanguageProcedure Changing Screen Contrast Introduction Section CalibrationCalibrating Temperature Procedure Calibration Slope and Offset PH at 25C Standards Nominal pHEnter Choose Measurement Choose BufferCalManual Calibration pH S1ManualCal? Choose Measurement Choose Standardize Standardization pHEntering a Known Slope Value pH ORP Calibration Preparation of ORP standard solutionsProcedure-Calibration against a standard meter and cell Calibrating AN IN-SERVICE Sensor ConductivityChoose Measurement Choose InProcess Procedure-Calibration against a standard solution ProgramDisplay Calibrate? Choose Measurement Choose CellConst Placing a NEW Sensor in Service ConductivityCell constant Conductivity µS/cm Resistor k Ω Calibrating the Analyzer ConductivityTo Reset the Factory Resistance CALIBRATION, see Section Replacement Parts Section MaintenanceOverview Model Description See FigureExploded View of Solu Comp II Panel Mount Version Exploded View of Solu Comp II Pipe/Surface Mount Version Overview Troubleshooting Using Fault Codes Section TroubleshootingSimulating Inputs Conductivity Simulating Temperature Absolute Value of Measured Voltage Exceeds 2500 mVConductivity Sensor Open or Shorted PH Sensitive Glass Membrane is BrokenRTD Sense Line for Sensor 1 or Sensor 2 is Open Eeprom FailureCalibration Error During Two-Point Calibration Problem See SectionCalibration Error during Standardization Invalid Input While Manually Entering SlopeSensor Does Not Respond to Known pH Changes Model Solu Comp Section Troubleshooting Calibration Error Using Standard Resistors Measurement seems wrong Alarm Relays Do Not WorkConductivity, µS/cm Cell constant, /cm Current Output Too LowSimulating pH input when the preamplifier is in the sensor GeneralPreamplifier is in the Sensor Simulating Inputs Conductivity Set the temperature correction to raw SectionThree-Wire RTD Configuration Simulating temperatureChecking for a Poisoned Reference Electrode Measuring Reference VoltageNON-WARRANTY Repair Warranty RepairSection Return of Material GeneralWarranty Specifications subject to change without notice

PN 51-1055pHC/rev.K specifications

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