Hamilton Electronics manual PH ARC Sensors Modbus RTU Programmer’s Manual EPHUM011

Page 36

pH ARC Sensors Modbus RTU Programmer’s Manual (EPHUM011)

Standard Calibration with Automatic Recognition of the Standard

Prior to calibration, the specialist selects - for each set of calibration standards - a list of calibration standards allowed for automatic recognition (register 9530).

When the calibration is initiated, the sensor screens this list of allowed calibration standards and checks if the currently measured electrical potential is within the allowed range of electrical potentials, defined for the individual calibration standards in this list.

If the sensor does find a corresponding calibration standard, the nominal pH value of the specific calibration standard is assigned to the currently measured electrical potential. The temperature dependency of the calibration standard is considered during the assignment.

Temperatue dependency of Hamilton pH buffer solutions

 

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Figure 2.7.3.1.2: Temperature dependency of the pH value of HAMILTON DURACAL calibration standards.

If the sensor does not find any corresponding calibration standard, the bit representing the corresponding status “no matching calibration standard”is set in the calibration status register.

Note that only the nominal value of the calibration standard is used for calibration. The actual value of the calibration solution, which may deviate from the nominal value, is not taken into account and cannot be set by the operator.

Standard Calibration with Manual Selection of the Calibration Standard

If the operator knows in what calibration standard the sensor is immersed, he can initiate the calibration procedure by means of setting the pH value to the actual value of the calibration standard. The sensor now screens the list of calibration standards that are allowed for manual selection (register 9530). If the pH value entered by the operator fits in the allowed pH range of one of the allowed calibration standards, the entered pH value is assigned to the currently measured electrical potential. The temperature dependency of the calibration standard is considered during the assignment.

If the sensor does not find any corresponding calibration standard, the bit representing the corresponding status “no matching calibration standard”is set in the calibration status register.

Note: using manual selection only, the actual pH value of the calibration standard can be set. However, the actual value must be within the given tolerance of the standard in use.

624300/01

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Contents PH ARC Sensors Important Notice Configuration of the Serial RS485 Interface Configuration of the Analog InterfacesConfiguration of the Measurement Sensor Identification and InformationIntroduction Visiferm do Modbus RTU Programmer’s Manualp/n 624179/01EPHUM011 Operator levels and Passwords Reading / Setting Operator LevelGeneral 0x03Changing Passwords for Operator Level 0x300x0C 18111978 0x0B 18111978Configuration of the serial RS485 Interface Device AddressReading and Writing the Device Address Reading the Device Address LimitsBaud Rate Reading and Writing the Baud RateReading the Baud Rate Limits Configuration of the Analog Interfaces Available Analog InterfacesAvailable Analog Interface Modes 0x07Selection of an Analog Interface Mode Description of the Analog Interfaces 1MA interface #1 MA interface #2Configuration of the 4-20 mA Interface 0x210x01 PH ARC Sensors Modbus RTU Programmer’s Manual EPHUM011 Reading the Selected Physical Unit for Analog Interface 0x001000Defining the Measurement Values for 4, 12 and 20 mA Output PH ARC sensor 4-20mA inte rface linear Defining a Constant Current Output for Testing 0x010001 Reading the Internally Measured Output Current 99186 99742Measurement Definition of Measurement Channels and Physical UnitsSpecial Primary Measurement Channel 1 pH Description of PMC1Selecting the Physical Unit for PMC1 0x201000Reading the measurement value of PMC1 0x1000 02503 0x000x200000 175.9922 0x00 954.6541 Primary Measurement Channel 6 Temperature Description of PMC6Selecting the Physical Unit for PMC6 0x06Input of an Externally Measured Temperature Definition of the Measurement Status for PMC1 / PMC6Reading the measurement value of PMC6 0x04 24.35834 0x00 130Secondary Measurement Channels Description of SMCReading the measurement value of SMC 0x8000 247.56Configuration of the Measurement Available Parameters2 PA9 Moving Average Effect of Moving Average n=1 vs n=16Description of PA9 Moving Average Selecting the Physical Unit and Writing the Value for PA9Reading all Values for PA9 3 PA12 Moving Average R Description of PA12 Moving Average RSelecting the Physical Unit and Writing the Value for PA12 Reading all Values for PA12 Calibration Available Calibration PointsDefinitions of Calibration Points Calibration Points 1 and 2 Standard CalibrationCP1 CP2Calibration Point 6 Product Calibration CP6Calibration Procedure Calibration at CP1 and CP2 Standard CalibrationPH ARC Sensors Modbus RTU Programmer’s Manual EPHUM011 Choose one of the calibration points CP1 or CP2 0x00000000 0x00001000 100 Calibration at CP6 Product Calibration200 Definition of the commands for product calibration Product calibration Initial measurementProduct calibration Cancel Product calibration AssignmentProduct calibration Restore standard calibration Product calibration Restore product calibrationReading the Calibration Status Reading the Calibration Status of CP1 and CP20x00000080 0x00001000 0x00000180 0x00001000Reading the Calibration Status of CP6 Product Calibration 0x01000000 0x00001000 0x08000000 0x000010000x0A000000 0x00001000 0x14000000 0x000010000x10000000 0x00001000 Currently active Calibration Parameters part 0x00000004 24.35184 23.780x00000004 24.37691 16.45 0x00000004 29.93368 379.5167003401 179.927 297.1378 006804 099747 296.690110469 298.3302 607782 59.47631 298.15Special Commands for Calibration with Visical Calibration Standards Available Sets of Calibration StandardsLSB 0x00000001 Set 0x0000003FDefinitions for Individual Sets of Calibration Standards 1800x0FFF0FFF 0x02480FFF 0x05540FFFDIN Nist StandardMettler Toledo Radiometer Temperature Ranges Sensor StatusOperating Hours and Counters 168.3667Currently Active Warnings History of WarningsDefinition of Warnings Errors Currently Active ErrorsHistory of Errors Definition of Errors Reading Definition of SIP and CIP SIPCIP Reading the Sensor’s Quality Indicator 120 130Sensor Identification and Information General InformationSensor Identification EPHFI010Free User Memory Space 0001001Freeuserspace System Commands Recall Sensor’s Factory SettingsHello World 732255PH ARC Sensors Modbus RTU Programmer’s Manual EPHUM011
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