Sigma C4 manual Su err, Software Probe Correction Calibration

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The mode switch must be subsequently turned to the SETUP position to clear the display and resume normal operations. Be sure you remember to restore any setup parameters that have been changed by the system reset.

3.7.3 Setup parameter integrity checking

Each time the system must rely on a system setup parameter the condition of the setup parameter table is checked against a replica that the system stores in another place in memory. If there is any difference between the two copies of the parameter table, the system will try to determine which table is correct and restore the incorrect copy. If restoration is not possible, the system will turn off all heating and cooling, reinitialize the setup parameters to their defaults, and display

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The mode switch must be subsequently turned to the SETUP position to clear the display and resume normal operations. Be sure you remember to restore any setup parameters that have been changed by the system reset

3.8 Software Probe Correction (Calibration)

The C4 will allow you to enter data via Setup or Remote mode that will correct any anomalies in the temperature readings and control at two points. Such adjustments are sometimes necessary to optimize accuracy at a particular temperature, or to compensate for differences between raw probe temperature data and actual temperatures.

Note: The purpose of Software Probe Correction is to allow precise calibration at two points near the critical points of the user’s testing scheme. It does not replace the hardware calibration process, nor should it. A number of system health checks as well as process limits are based upon the raw, or uncorrected, temperatures reported by the probes. It is important to optimize the hardware level calibration before using this software calibration method.

Software probe correction is achieved by entering four temperatures, U1, C1, U2,

&C2, for each probe into the setup parameter table. U1 & U2 are the uncorrected, or displayed, temperatures at two points. C1 & C2 are the corrected, or actual, temperature at those same two points. Thus to make a correction using ice water (0/C) and boiling water (100/C) when the display shows 2.3/C for the ice water and 99/C for the boiling water, the user would enter the following:

C4 Manual Rev 7.5.2

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Contents Sigma Systems Programmable Temperature Controller / InterfaceC4 Manual Rev Table of Contents Intelligent 2 Probe Control C4 Manual Rev C4 Manual Rev C4 Manual Rev C4 Manual Rev Models C4 & CC-3.5Explained IntroductionGeneral Description Release 7.5.2 Firmware Custom Features / Interchangeability WarningC4 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 Front Panel Physical DescriptionMode Switch Clear Prog J1 TOP Rear Panel ConnectionsC3-5 Rel General Operation & Error Conditions200 100c 392 148f Startup DisplaysUpdating Firmware Upgrading Firmware by Prom Replacement Making the physical connection for upload Rs load Restoring Setup Parameters to Default ValuesSu res Ee busy and then su doneC4 Manual Rev Fahrenheit Operation P1fSystem Operating Temperature Range P1 lo P1 hiProbe Out of Range Shutdown P1 err P1 -err Internal Error Shutdown Conditions Res errAll res Software Probe Correction Calibration Su errStatus 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 Displaying Temperature Local Mode Basic OperationS1 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 00.1 Substep Step Data 00.0Ramp time 00.2Maximizing Ramp Speed & Other Ramp Considerations Displaying Program Steps not during execution Clearing Program Memory Reinitializing program stepsEntering 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 System Information Queries Command Summary by functional groupSystem 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 IEEE-488 Gpib Error and Status Reporting OverviewTemperature 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 Temperature Control Terms PID Setup fields 0, 10, 11 Blower Shut-off Mode Setup fieldEntering probe correction setup data C4 Manual Rev C4 Manual Rev Programming Examples & Notes Appendix00.2 00.000.3 00.4Using shortcuts to shorten program entry time DISP/CNTLSTART/STOP 9900CLEAR/ENTRY 6 Enter 04.2 04.004.3 04.407.2 07.007.3 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 101 Field Calibration of Model C4 Controller102 103 TroubleshootingNoise Immunity 105 Firmware Upload Problems 107 Temperature Control PID Tuning & Problems108 109 110 111 Technical Support, Repairs & Returns U1f 102.7113 Index114 115 GpibIEEE488 Gpib 117 118 119 SRQ120