Omega Engineering CYD201 and CYD208 Verifying SoftCal Operation, Erasing SoftCal Compensations

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OMEGA Model CYD201/CYD208 User’s Manual

3.6.2Verifying SoftCal™ Operation

Check the status of SoftCal™ by holding UNITS for 2-3 seconds. If SoftCal™ is not in operation, "-000-" displays.

If the first digit of the display is 1, SoftCal™ is set for below 28 K. If either the second or third digit is 1, SoftCal™ is set for above 28 K.

3.6.3Erasing SoftCal™ Compensations

When SoftCal™ compensations are erased, the thermometer returns to normal operation.

1.Move the SET switch to position 1.

2.Hold UNITS until the front panel displays 0. This key is a toggle. If the display moves in the wrong direction, release and press again.

3.Press CAL ENABLE on rear panel using a pen tip. The display changes from 0 to "-SOF-". The alarm setpoint displays after erasing SoftCal™ compensation.

4.Move the SET switch to position 0.

Operation

3-5

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Contents M789-038A June Return Requests / Inquiries WarrantyTable of Contents Table of Contents List of Illustrations This Page Intentionally Left Blank Table of Contents Chapter Introduction GeneralModel CYD201/CYD208 General Description Resolution Model CYD201/CYD208 SpecificationsLHe and LN2 Safety Precautions Handling Cryogenic Storage DewarsHandling Liquid Helium and Liquid Nitrogen Electrostatic Discharge Recommended First AidGround The Instrument Safety SummaryIdentifying Esds Components Handling Esds ComponentsDo Not Substitute Parts Or Modify Instrument Safety SymbolsDo Not Operate In An Explosive Atmosphere Keep Away From Live CircuitsChapter Installation Inspection and UnpackingRepackaging for Shipment Sensor Installation Recommendations Power and Ground RequirementsTwo-Lead Vs Four-Lead Measurements Two-Lead MeasurementFour-Lead Measurement Sensor Mounting Connecting Leads To The SensorMeasurement Errors Due To AC Noise Sensor Input Connections J1 InputTerminal Description Rack Mounting Sensor Curve DefinitionModel CYD208-DIN Rack Mounting Hole SizesPower UP Errors Initial Power UP SequenceThis Page Intentionally Left Blank Installation Units KEY Chapter OperationAlarm Operation Alarm SetpointScan Mode Model CYD208 Only Setting Dwell Times Model CYD208 OnlyLatched And Unlatched Alarms Alarm Fix Function Model CYD208 OnlySoftcal Compensations SoftCal Calibration Procedure Erasing SoftCal Compensations Verifying SoftCal OperationOperation Chapter Remote Operation Serial Interface ConnectionsSerial Interface J2 Serial I/O Serial I/O RJ-11 Connector Pin DefinitionsSample Basic Program Serial Interface OperationReturned Serial Interface Command SummarySample Quick Basic 4.0 Program InputInput R Returned Nothing Input F0x Returned NothingInput Hxxx.x Returned Nothing Input Lxxx.x Returned NothingEnd Scanning Model CYD208 Only Switch ID and Alarm DataHigh or Low Parameter H = high alarm, L = low alarm Input YCx Returned NothingSign,sensor reading,units,alarm status Crlf Current channel,sign,sensor reading,units, alarm statusCRLFScan Status Model CYD208 Only This Page Intentionally Left Blank Remote Operation Model CYD201 Rear Panel Connections Chapter ServiceModel CYD208 Rear Panel Connections Model CYD208 Rear Panel ConnectionsGeneral Maintenance Error Code TroubleshootingLine Voltage Configuration Fuse ReplacementCurrent Source Calibration RecalibrationModel CYD201 Model CYD208 Serial Interface Cable and Adapters 2 A/D Converter CalibrationModel CYD200-B RJ-11 to DE-9 Adapter Wiring Details Page Accessories Model Description of Accessory Chapter Options and AccessoriesModel Description of Accessory Model CYD201/CYD208 Wires Lsci P/N Description of CableDIN Series CY-7 Model CYD201/CYD208 Sensors Sensor no Description of SensorSeries DT-420 Series DT-450Options and Accessories A1.0 General Appendix a Curve TablesTable A-2. Curve 1 DT-500DI-8A Voltage-Temp. Characteristics Table A-3. Curve 2 DT-500DRC-D Voltage-Temp. Characteristics 6591 18.0 Table A-5. Curve 4 CTI Diode Voltage-Temp. Characteristics Table A-6. Curve 5 DT-500DI-8C Voltage-Temp. Characteristics Table A-7. Curve 6 CY-7 Voltage-Temp. Characteristics 305.0 50689 Page Page Temperature PRESSURE/STRAINFlow