Sigma C4 manual P1 lo P1 hi, System Operating Temperature Range, Probe Out of Range Shutdown

Page 30

3.5 System Operating (Temperature) Range

The C4 controller operates within the limits of the system devices. There are 3 pairs (low-high) of temperature limits that constrain the range of operations.

1.The range of the C4 as it is set at the factory

2The range of the controlled device (chamber or platform) as described by setup parameters F25 & F26.

3The range of the UUT (unit under test) as described by setup parameters F27 & F28.

Each of these ranges is characterized by a low limit and a high limit. The highest of the 3 low limits is the low temperature System Operation Limit. The lowest of the 3 high limits is the high temperature System Operation Limit. In other words, the controller will respect the most restrictive limits that are described by the combination of the 3 ranges listed above.

The low and high temperature System Operating Limits define the System Operating Range. The controller will not accept setpoints outside the System Operating Range and will report error conditions and stop controlling if the controlling probe(s) report a temperature too far outside that range.

Note: Probe 1 is always in the chamber airstream or platform and is always monitored for conformance with the System Operating Range. Probe 2 is monitored for conformance only if it is being used for control.

3.6 Probe Out of Range Shutdown

When the C4 is actively controlling the temperature of a chamber or platform, it frequently checks to be certain that the control temperature, as reported by any active control probe, is within the System Operating Range.

In the event that the temperature reported by the active control probe is more than 20/C, and less than 50/C, outside the controller’s System Operating Range, then the controller will presume that a “run away” condition exists. The controller will turn off all heating and cooling and stop controlling. Blowers will be left in the condition determined by setup parameter F15 (Blower shut-off mode). The controller display will show

p1 lo

p1 hi

30	C4 Manual Rev 7.5.2

Image 30

Contents Programmable Temperature Controller / Interface Sigma SystemsC4 Manual Rev Table of Contents Intelligent 2 Probe Control C4 Manual Rev C4 Manual Rev C4 Manual Rev C4 Manual Rev Introduction Models C4 & CC-3.5ExplainedGeneral Description Custom Features / Interchangeability Warning Release 7.5.2 FirmwareC4 vs. CC-3 Differences What’s New Firmware Uploads Forced Start from Prom Firmware Internal Error Shutdown Conditions Intelligent 2 Probe Control Probe Averaging Program Mode Step Insert & Delete RSA Remote Mode Setup Parameter Commands Physical Description Front PanelMode Switch Clear Prog Rear Panel Connections J1 TOP200 100c 392 148f General Operation & Error ConditionsC3-5 Rel Startup DisplaysUpdating Firmware Upgrading Firmware by Prom Replacement Making the physical connection for upload Su res Restoring Setup Parameters to Default ValuesRs load Ee busy and then su doneC4 Manual Rev P1f Fahrenheit OperationSystem Operating Temperature Range P1 lo P1 hiProbe Out of Range Shutdown P1 err P1 -err Internal Error Shutdown Conditions Res errAll res Su err Software Probe Correction CalibrationStatus and Error Reporting Fail-safe System C4 Manual Rev Intelligent 2 Probe Control How Intelligent 2 Probe Control functions Preparing for Intelligent 2 Probe Control Using Intelligent 2 Probe Control Local Mode Basic Operation Displaying TemperatureS1 102.6 s1f S1 nsp S1f nspDisplaying and Changing the Setpoint Sor -sor Sp errControlling to a Setpoint C4 Manual Rev Program Mode 06.0Description of a Program Step Ramp time Substep Step Data 00.000.1 00.2Maximizing Ramp Speed & Other Ramp Considerations Clearing Program Memory Reinitializing program steps Displaying Program Steps not during executionEntering or Changing a Program Step Insert Program StepPress CLEAR/ENTRY Delete Program step Press CLEAR/ENTRY Press CLEAR/ENTRY againRunning Executing a Program Program Run Time Information/Considerations 007 nop2 Loop005 sor Sor Special Commands External Compressor On Common Programming Issues C4 Manual Rev Remote Mode EIA-232 InterfaceIEEE-488 Interface Command Summary by functional group System Information QueriesSystem Information Queries For Celsius mode For parameters numbered 0 through C4 Manual Rev Operation Information Queries & Commands REerror byteCRLF C4 Manual Rev Qccrlf PTnCRLF Setup Parameter Commands SC1 0 2.3 100 WP 6 5 5CRLF Upcrlf System Operation Commands Celsius mode Will hold the current setpoint for 1 hour and 20 minutes U1c 65.0 u1f Error and Status Reporting Overview IEEE-488 GpibTemperature in 20 minutes C4 Manual Rev Error/Status String Bit Definitions C4 Manual Rev Setup Mode PID controller, Integral term Adjustment not Displaying the Field Values Changing the Value of a Setup Field Two Probe Mode Setup fieldAuto-start Mode Setup field Blower Shut-off Mode Setup field Temperature Control Terms PID Setup fields 0, 10, 11Entering probe correction setup data C4 Manual Rev C4 Manual Rev Appendix Programming Examples & Notes00.3 00.000.2 00.4Using shortcuts to shorten program entry time 9900 DISP/CNTLSTART/STOPCLEAR/ENTRY 6 Enter 04.3 04.004.2 04.407.3 07.007.2 07.4C4 Manual Rev Sigma Systems C4 Programming Worksheet Sample Command Structure for IEEE-488 Gpib Operation Disp A$ Installation and Use of TTL Outputs and Input Field Calibration of Model C4 Controller 101102 Troubleshooting 103Noise Immunity 105 Firmware Upload Problems Temperature Control PID Tuning & Problems 107108 109 110 111 U1f 102.7 Technical Support, Repairs & ReturnsIndex 113114 Gpib 115IEEE488 Gpib 117 118 SRQ 119120