Fisher 244ER, 244EH manual FAILURE MODE Changing Switch Positions

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Figure 2-13. Transmitter Power, Sensor, and Configuration Terminals

Rosemount Models 244EH and 244ER PC-Programmable Temperature Transmitters

Figure 2-13. Transmitter Power, Sensor, and Configuration Terminals

FAILURE MODE

Changing Switch Positions

		Model 244EH		Model 244ER
			Sensor	Sensor Terminal
			Terminals
1	2	3	4		1105E01B
			Configuration
			Terminals	Failure Mode Switch

			Failure Mode	Power/Configuration	-1260B02D,
			Switch	Power/Configuration
			Switch	Terminals
				Terminals
			Power Terminal
			Power Terminal		244
					244

The Models 244EH and 244ER features software driven alarm diagnostics and an independent circuit. These features are designed to provide separate backup alarm output in case the microprocessor, electronics, hardware, or software fails. The alarm levels are user selectable using the Failure Mode Switch. The position of the jumper determines the direction in which the output is driven (HI or LO) in case of alarm. The jumper switch feeds into the Digital-to-Analog (D/A) converter, which drives the proper alarm output even if the microprocessor fails.

The values to which the transmitter drives its output in failure mode depend on whether it is factory configured to standard or NAMUR-compliantoperation. See “Failure Mode” on page A-2for these parameters.

To determine the failure mode configuration of a transmitter, review the low and high alarm levels on the SERVICE menu provided by the configuration software.

To change the failure mode on the Model 244EH or 244ER transmitter, follow the steps described below.

1. If the transmitter is mounted in an enclosure, remove the enclosure cover.

2.Locate the orange failure mode switch. The switch is located near the power terminals on the Model 244EH and in the center of the front panel on the Model 244ER (see Figure 2-13).

3.Move the switch to the desired alarm setting. To set the failure mode to high alarm, position the switch toward the “HI” mark on the terminal block; to set the failure mode to low alarm, position the switch in the opposite direction.

4. Replace the enclosure cover (if applicable). Enclosure covers must be fully engaged to meet explosion-proof requirements.

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Contents 00809-0100-4737 English Rev. EA Models 244EH and 244ER PC-Programmable Temperature TransmittersPage ¢00809-0100-4737f¤ Product ManualModels 244EH and 244ER PC-Programmable Temperature Transmitters 00809-0100-4737 Rev EA 10/00Page Maintenance and Table of ContentsInstallation TroubleshootingAPPENDIX B APPENDIX AReference Data Approvals1 Introduction SAFETY MESSAGESSection MANUAL OVERVIEW Mechanical CONSIDERATIONSGeneral ElectricalPage 2 Installation SAFETY MESSAGES WarningsFigure 2-1. Transmitter Installation Flowchart TOOLS NEEDED FOR INSTALLATIONThe tools needed for installation are as follows MOUNTING ExampleSpecial Mounting Considerations Mounting a Model 244EH to a DIN RailHead Mount Transmitter with DIN Plate Style Sensor INSTALLATION PROCEDURESTransmitter and Assembly Figure 2-6. Typical Model 244EH Transmitter Mounting ConfigurationUsing Threaded Style Sensor Head Mount Transmitter with Threaded SensorTo complete the assembly, follow the procedure described below Figure 2-7. Typical Rail Mount Transmitter Mounting ConfigurationUsing Integral Mount Sensor and Assembly 6. Run sensor lead wires from the sensor assembly to the transmitterRail Mount Transmitter with Threaded Sensor 644-0000A04BSystem Requirements Configuration SoftwareMultichannel Installations Procedure for Windows 95 or Windows NT Choose the procedure that matches the operating system you are usingProcedure for Windows 3.1 or Windows for Workgroups Screen Conventions Model 244EC Configuration InterfaceSetting Up the Model 244EC Configuration Interface FIELD WIRING Figure 2-10. Complete Transmitter Configuration SystemSensor Connections RTD or Ohm InputsGiven Sensor Lead Wire Resistance Effect RTD InputExamples of Approximate Lead Wire Resistance Effect Calculations Total cable length = 150 mThermocouple or Millivolt Inputs FAILURE MODE Changing Switch Positions Figure 2-13. Transmitter Power, Sensor, and Configuration TerminalsPOWER SUPPLY Surges/Transients 3 OperationCONFIGURATION GroundingConfiguration Window Configuring a Single TransmitterFigure 3-1. Models 244EH and 244ER Configuration Software Main Configuring Several Transmitters Identically Figure 3-2. Viewing the Process Variable with the 244EC Viewing the Process VariableINTERMITTENT SENSOR ALGORITHM Case 2 Temperature Change Greater than the Case ExamplesCase 1 Open Sensor Threshold Value2% of Output RangeIntermittent Sensor Algorithm and Damping Case 3 Temperature Change Within the Threshold Value 2 % of Rangethe damping curve at that time , and continues to calculate and Intermittent Sensor Detect Advanced Feature2.0 seconds, the transmitter outputs the reading that corresponds to continues to approach the input curveaccordingto theequation aboveTransmitter Behavior with Intermittent Sensor Detect OFF ImplementationTransmitter Behavior with Intermittent Sensor Detect ON Page TROUBLESHOOTING Model 244EH software version 4 Maintenance and TroubleshootingSAFETY INFORMATION Cause and Possible Solutions Troubleshooting ChartError Message TABLE 4-1. Models 244EH and 244ERA Reference Data TRANSMITTER SPECIFICATION FunctionalAppendix Power SupplyPower Supply Effect PerformanceUpdate Time CE Electromagnetic Compatibility Compliance TestingSensor AccuracyTABLE A-2. Model 244E Input Options and Accuracy InputTransmitters can be installed in locations where the ambient Ambient Temperature EffectElectrical Connections PhysicalWeight Materials of ConstructionProduct Description ORDERING INFORMATIONModel HeadTypical Model Number 244EC TABLE A-5. Model 244EC Configuration Interface Ordering InformationTABLE A-6. Transmitter Accessories Part DescriptionUnless specified, transmitter will be shipped as follows Standard ConfigurationCustom Configuration TaggingConfiguration Interface DIMENSIONAL DRAWINGS TransmitterEnclosure and Model 244EC Configuration Interface Model 244ERPage HAZARDOUS LOCATIONS INSTALLATIONS B ApprovalsCanadian Standards Association CSA Approvals LOCATIONS CERTIFICATIONSFactory Mutual FM Approvals Special Conditions for Safe Use Standard Australia Quality Assurance Service SAAKEMA Approvals INSTALLATION DRAWINGS GostandartFigure B-1. Canadian Standards Association CSA Intrinsic Safety Installation Drawing Rev. ABInstallation Drawing Rev. AA Figure B-2. Canadian Standards Association CSA Explosion-ProofFigure B-3. Factory Mutual FM Intrinsic Safety Installation Drawing 00644-0009, Rev. AAFigure B-4. Factory Mutual FM Explosion-Proof Installation Drawing 00644-1049, Rev. ABC Models 644 and 244E Temperature Transmitters Manual Supplement Considerations Transmitter Design Sensor Wiring Diagrams Special MountingOLD TRANSMITTER Models 644H and 244EH2. Select 1 Off-line, 1 New Configuration, Rosemount, 644 Temp NEW TRANSMITTERConsiderations HART Communicator Model 644H only Use with an Existing DIN Plate Style SensorFactory Mutual3 SPECIFICATIONSBASEFFA1 Intrinsically Safe Installation Entity Parameters Entity ParametersIndex Wiring Page Product documentation available at