Programming the HP E1415 for PID Control
103
Creating and Loading Custom EU Conversion Tables
The HP E1415 provides for loading custom EU conversion tables. This
allows you to have on-board conversion of transducers not otherwise
supported by the HP E1415.
Standard EU Operation
The EU conversion tables built into the HP E1415 are stored in a "library"
in the module’s non-volatile Flash Memory. When you link a specific
channel to a standard EU conversion using the [SENSe:]FUNC:
…
command, the module copies that table from the library to a segment of
RAM allocated to the specified channel. When a single EU conversion is
specified for multiple channels, multiple copies of that conversion table are
put in RAM, one copy into each channel’s Table RAM Segment. The
conversion table-per-channel arrangement allows higher speed scanning
since the table is already loaded and ready to use when the channel is
scanned.
Custom EU Operation
Custom EU conversion tables are loaded directly into a channel’s Table
RAM Segment using the DIAG:CUST:LIN and DIAG:CUST:PIEC
commands. The DIAG:CUST:
…
commands can specify multiple channels.
To "link" custom conversions to their tables you would execute the
[SENSe:]FUNC:CUST <range>,(@<ch_list>) command. Unlike standard
EU conversions, the custom EU conversions are already linked to their
channels (tables loaded) before you execute the [SENSe:]FUNC:CUST
command but the command allows you to specify the A/D range for these
channels.
NOTE
The *RST command clears all channel Table RAM segments. Custom EU
conversion tables must be re-loaded using the DIAG:CUST:
…
commands.
Custom EU Tables
The HP E1415 uses two types of EU conversion tables, linear and piecewise.
The linear table describes the transducer’s response slope and offset
(y=mx+b). The piecewise conversion table gets its name because it is
actually an approximation of the transducer’s response curve in the form of
512 linear segments whose end-points fall on the curve. Data points that fall
between the end-points are linearly interpolated. The built-in EU
conversions for thermistors, thermocouples, and RTDs use this type of table.
Custom Thermocouple
EU Conversions
The HP E1415 can measure temperature using custom characterized
thermocouple wire of types E, J, K, N, R, S, and T. The custom EU table
generated for the individual batch of thermocouple wire is loaded to the
appropriate channels using the DIAG:CUST:PIEC command. Since
thermocouple EU conversion requires a "reference junction compensation"
of the raw thermocouple voltage, the custom EU table is linked to the
channel(s) using the command [SENSe:]FUNCtion:CUSTom:TCouple
<type>[,<range>],(@<ch_list>).
The <type> parameter specifies the type of thermocouple wire so that the
Содержание VXI 75000 C Series
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Страница 30: ...30 Getting Started Chapter 1 Notes ...
Страница 32: ...32 Field Wiring Chapter 2 Figure 2 1 Channel Numbers at SCP Positions ...
Страница 44: ...44 Field Wiring Chapter 2 Figure 2 11 HP E1415 Terminal Module ...
Страница 54: ...54 Field Wiring Chapter 2 Notes ...
Страница 61: ...Programming the HP E1415 for PID Control 61 Chapter 3 Programming Overview Diagram ...
Страница 124: ...124 Creating and Running Custom Algorithms Chapter 4 Figure 4 2 Algorithm Operating Sequence Diagram ...
Страница 136: ...136 Creating and Running Custom Algorithms Chapter 4 Notes ...
Страница 152: ...152 Algorithm Language Reference Chapter 5 Notes ...
Страница 304: ...304 HP E1415 Command Reference Chapter 6 Command Quick Reference Notes ...
Страница 308: ...308 Specifications Appendix A Thermocouple Type E 200 800C SCPs HP E1501 02 03 ...
Страница 309: ...Specifications 309 Appendix A Thermocouple Type E 200 800C SCPs HP E1508 09 ...
Страница 310: ...310 Specifications Appendix A Thermocouple Type E 0 800C SCPs HP E1501 02 03 ...
Страница 311: ...Specifications 311 Appendix A Thermocouple Type E 0 800C SCPs HP E1509 09 ...
Страница 312: ...312 Specifications Appendix A Thermocouple Type E Extended SCPs HP E1501 02 03 ...
Страница 313: ...Specifications 313 Appendix A Thermocouple Type E Extended SCPs HP E1508 09 ...
Страница 314: ...314 Specifications Appendix A Thermocouple Type J SCPs HP E1501 02 03 ...
Страница 315: ...Specifications 315 Appendix A Thermocouple Type J SCPs HP E1508 09 ...
Страница 316: ...316 Specifications Appendix A Thermocouple Type K SCPs HP E1501 02 03 ...
Страница 317: ...Specifications 317 Appendix A Thermocouple Type R SCPs HP E1501 02 03 ...
Страница 318: ...318 Specifications Appendix A Thermocouple Type R SCPs HP E1508 09 ...
Страница 319: ...Specifications 319 Appendix A Thermocouple Type S SCPs HP E1501 02 03 ...
Страница 320: ...320 Specifications Appendix A Thermocouple Type S SCPs HP E1508 09 ...
Страница 321: ...Specifications 321 Appendix A Thermocouple Type T SCPs HP E1501 02 03 ...
Страница 322: ...322 Specifications Appendix A Thermocouple Type T SCPs HP E1508 09 ...
Страница 323: ...Specifications 323 Appendix A 5K Thermistor Reference SCPs HP E1501 02 03 ...
Страница 324: ...324 Specifications Appendix A 5K Thermistor Reference SCPs HP E1508 09 ...
Страница 325: ...Specifications 325 Appendix A RTD Reference SCPs HP E1501 02 03 ...
Страница 326: ...326 Specifications Appendix A RTD SCPs HP E1501 02 03 ...
Страница 327: ...Specifications 327 Appendix A RTD SCPs HP E1508 09 ...
Страница 328: ...328 Specifications Appendix A 2250 Thermistor SCPs HP E1501 02 03 ...
Страница 329: ...Specifications 329 Appendix A 2250 Thermistor SCPs HP E1508 09 ...
Страница 330: ...330 Specifications Appendix A 5K Thermistor SCPs HP E1501 02 03 ...
Страница 331: ...Specifications 331 Appendix A 5K Thermistor SCPs HP E1508 09 ...
Страница 332: ...332 Specifications Appendix A 10K Thermistor SCPs HP E1501 02 03 ...
Страница 333: ...Specifications 333 Appendix A 10K Thermistor SCPs HP E1508 09 ...
Страница 334: ...334 Specifications Appendix A Notes ...
Страница 346: ...346 Glossary Appendix C Notes ...
Страница 388: ...388 Generating User Defined Functions Appendix F Notes ...
Страница 438: ...438 Index Writing the algorithm 129 values to CVT elements 120 values to the FIFO 121 Z ZERO CALibration ZERO 194 ...