Apollo IMY instruction manual Temperature Monitoring Example

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TEMPERATURE MONITORING EXAMPLE

An IMY is installed as a monitoring device and back-up controller for a freezer storage facility. Normally, the freezer temperature is maintained at about -29C 2. The absolute maximum allowable temperature of the freezer is 0C. In the event of a system failure, alarm output #1 of the IMY is programmed to start a secondary cooling system should the temperature reach 0C. The additional alarm of the IMY is used to signal personnel with a warning bell when the temperature rises above -17C (indicating a possible failure of the main cooling system). This alarm is programmed to latch in order to assure that personnel inform maintenance of a possible problem. Key switches are installed to lock out the front panel from unauthorized personnel and to provide a means of resetting the latched alarm. The Integrator/totalizer option is specified to store peak and valley temperatures overnight, weekly, etc. Programming module #5 (Pro 5) is used to set up the integrator. The re-transmitted analog output is specified to drive a chart recorder with 4-20 mA for a hard copy of temperature profiles for later evaluation.

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Contents Apollo Intelligent Meter Series Introduction Table of Contents Page Safety Information Safety SummaryDefinition of Terms General Description Theory of OperationBlock Diagram Programming and Operating the IMY Programming the IMYDisplay Module #2 Program Temperature Display Offset and Slope Display Alarm Values Enter Alarm ValuesReset Latched Alarms Reset PEAK/VALLEY Memory BufferTemperature Offset Value Enter Offset ValueModule #4 Program Digital Filter and Remote Input Program Digital FilteringProgram Function of E1-CON and Optional E2-CON Cont’d Module #5 Program INTEGRATOR/TOTALIZER Program Decimal Point Position for the INTEGRATOR/TOTALIZERProgram INTEGRATOR/TOTALIZER Time Base Module #6 Program ALARM/SETPOINT Alarm #2 Assignment to Input or INTEGRATOR/ Totalizer Program Value for Alarm #2Alarm #2 High or LOW Acting Baud Rate Unit Address NumberPrint Request Function Full or Abbreviated TransmissionModule #8 Program RE-TRANSMITTED Analog Output Analog Output SourceAnalog Output LO Display Value Analog Output HI Display ValueModule #9 Service Operations Enter Access CodeEnter Zero Reference Apply Precision ResistanceOperating the IMY Quick ProgrammingFactory Configuration SlopeProgramming Example Temperature Monitoring Example Offset and Slope Display Temperature INTEGRATOR/TOTALIZERPEAK/VALLEY INTEGRATOR/TOTALIZER Example Basic SET-UPINTEGRATOR/TOTALIZER SET-UP 125 x 827 Alarms Optional Alarm Timing DiagramsGeneral Description Communication FormatSending Commands to the IMY Command String ExamplesTiming Diagrams Current Loop Installation Wiring ConnectionsReceiving Data from the IMY Serial Terminal DescriptionsConnecting to AN RLC Printer Serial Communications ExamplesProcess Controlling System RE-TRANSMITTED Analog Output Optional Analog Output Calibration To 20 mA CalibrationAppendix a Installation & Connections Installation EnvironmentSelect AC Power 115/230 VAC EMC Installation Guidelines Wiring Connections Power WiringAppendix B Specifications and Dimensions Open Thermistor Detection Display UlululTo 20 mA Certifications and Compliances Safety Appendix C Troubleshooting Guide Problem Possible Cause RemediesAppendix D Programmable Functions Decimal Point PositonAppendix D Programmable Functions Cont’d Appendix E Ordering Information E2-CONLimited Warranty IMY/IM-A 3/02 Drawing NO. LP0311