Fisher 244EH, 244ER manual Mounting, Example

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MOUNTING

MOUNTING

Figure 2-2. Model 244EH Connection Head Temperature Rise vs. Extension Length

The Model 244EH installs in a connection head or universal head mounted directly on a sensor assembly, apart from a sensor assembly using a universal head, or to a DIN rail using an optional mounting clip. The Model 244ER mounts directly to a wall or to a DIN rail.

The Models 244EH and 244ER transmitters will operate within specifications for ambient temperatures between –40 and 185 °F (–40 and 85 °C).

In a direct mounting configuration using a Model 244EH transmitter, process heat is transferred from the thermowell to the transmitter via the connection head. If the expected connection head temperature is near or beyond specification limits, consider the use of additional thermowell lagging, an extension nipple, or a remote mounting configuration to isolate the transmitter from excessive temperatures. Figure 2-2provides an example of the relationship between transmitter housing temperature rise and extension length. Use Figure 2-2as a guide for determining adequate thermowell extension length.

(°C)

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Extension Length (mm)

 

Example

The transmitter specification limit is 85 °C. If the ambient temperature is 55 °C and the process temperature to be measured is 800 °C, the maximum permissible connection head temperature rise is the transmitter specification limit minus the ambient temperature

(85 –55 °C), or 30 °C. In this case, an extension of 100 mm meets this requirement, but 125 mm provides a margin of 8 °C, thereby reducing any temperature effects in the transmitter.

2-3

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Contents Models 244EH and 244ER PC-Programmable Temperature Transmitters 00809-0100-4737 English Rev. EAPage Models 244EH and 244ER PC-Programmable Temperature Transmitters Product Manual¢00809-0100-4737f¤ 00809-0100-4737 Rev EA 10/00Page Installation Table of ContentsMaintenance and TroubleshootingReference Data APPENDIX AAPPENDIX B ApprovalsSection SAFETY MESSAGES1 Introduction MANUAL OVERVIEW General CONSIDERATIONSMechanical ElectricalPage SAFETY MESSAGES Warnings 2 InstallationThe tools needed for installation are as follows TOOLS NEEDED FOR INSTALLATIONFigure 2-1. Transmitter Installation Flowchart Example MOUNTINGMounting a Model 244EH to a DIN Rail Special Mounting ConsiderationsTransmitter INSTALLATION PROCEDURESHead Mount Transmitter with DIN Plate Style Sensor Using Threaded Style Sensor Figure 2-6. Typical Model 244EH Transmitter Mounting Configurationand Assembly Head Mount Transmitter with Threaded SensorUsing Integral Mount Sensor and Assembly Figure 2-7. Typical Rail Mount Transmitter Mounting ConfigurationTo complete the assembly, follow the procedure described below 6. Run sensor lead wires from the sensor assembly to the transmitter644-0000A04B Rail Mount Transmitter with Threaded SensorMultichannel Installations Configuration SoftwareSystem Requirements Procedure for Windows 3.1 or Windows for Workgroups Choose the procedure that matches the operating system you are usingProcedure for Windows 95 or Windows NT Setting Up the Model 244EC Configuration Interface Model 244EC Configuration InterfaceScreen Conventions Figure 2-10. Complete Transmitter Configuration System FIELD WIRINGRTD or Ohm Inputs Sensor ConnectionsExamples of Approximate Lead Wire Resistance Effect Calculations Sensor Lead Wire Resistance Effect RTD InputGiven Total cable length = 150 mThermocouple or Millivolt Inputs Figure 2-13. Transmitter Power, Sensor, and Configuration Terminals FAILURE MODE Changing Switch Positions3 Operation POWER SUPPLY Surges/TransientsGrounding CONFIGURATIONFigure 3-1. Models 244EH and 244ER Configuration Software Main Configuring a Single TransmitterConfiguration Window Configuring Several Transmitters Identically INTERMITTENT SENSOR ALGORITHM Viewing the Process VariableFigure 3-2. Viewing the Process Variable with the 244EC Case 1 Open Sensor Case ExamplesCase 2 Temperature Change Greater than the Threshold Value2% of Output RangeCase 3 Temperature Change Within the Threshold Value 2 % of Range Intermittent Sensor Algorithm and Damping2.0 seconds, the transmitter outputs the reading that corresponds to Intermittent Sensor Detect Advanced Featurethe damping curve at that time , and continues to calculate and continues to approach the input curveaccordingto theequation aboveTransmitter Behavior with Intermittent Sensor Detect ON ImplementationTransmitter Behavior with Intermittent Sensor Detect OFF Page SAFETY INFORMATION 4 Maintenance and TroubleshootingTROUBLESHOOTING Model 244EH software version Error Message Troubleshooting ChartCause and Possible Solutions TABLE 4-1. Models 244EH and 244ERAppendix TRANSMITTER SPECIFICATION FunctionalA Reference Data Power SupplyUpdate Time PerformancePower Supply Effect CE Electromagnetic Compatibility Compliance TestingTABLE A-2. Model 244E Input Options and Accuracy AccuracySensor InputAmbient Temperature Effect Transmitters can be installed in locations where the ambientWeight PhysicalElectrical Connections Materials of ConstructionModel ORDERING INFORMATIONProduct Description HeadTABLE A-6. Transmitter Accessories TABLE A-5. Model 244EC Configuration Interface Ordering InformationTypical Model Number 244EC Part DescriptionCustom Configuration Standard ConfigurationUnless specified, transmitter will be shipped as follows TaggingEnclosure and Model 244EC Configuration Interface DIMENSIONAL DRAWINGS TransmitterConfiguration Interface Model 244ERPage B Approvals HAZARDOUS LOCATIONS INSTALLATIONSFactory Mutual FM Approvals LOCATIONS CERTIFICATIONSCanadian Standards Association CSA Approvals KEMA Approvals Standard Australia Quality Assurance Service SAASpecial Conditions for Safe Use Gostandart INSTALLATION DRAWINGSInstallation Drawing Rev. AB Figure B-1. Canadian Standards Association CSA Intrinsic SafetyFigure B-2. Canadian Standards Association CSA Explosion-Proof Installation Drawing Rev. AA00644-0009, Rev. AA Figure B-3. Factory Mutual FM Intrinsic Safety Installation Drawing00644-1049, Rev. AB Figure B-4. Factory Mutual FM Explosion-Proof Installation DrawingC Models 644 and 244E Temperature Transmitters Manual Supplement OLD TRANSMITTER Transmitter Design Sensor Wiring Diagrams Special MountingConsiderations Models 644H and 244EHConsiderations HART Communicator Model 644H only NEW TRANSMITTER2. Select 1 Off-line, 1 New Configuration, Rosemount, 644 Temp Use with an Existing DIN Plate Style SensorBASEFFA1 Intrinsically Safe Installation Entity Parameters SPECIFICATIONSFactory Mutual3 Entity ParametersIndex Wiring Page Product documentation available at