Laurel Electronics LT SERIES TRANSMITTERS ANALOG INPUT User Manual
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18. CUSTOM CURVE LINEARIZATION
Curve.exe is a DOS-based, executable PC program used to set up an Extended transmitter so
that the internal digital readings have a user-defined, non-linear relationship with the input
signal. For example, it allows a transmitter to correct for transducer nonlinearity. Calculated
linearizing parameters are downloaded from a PC into non-volatile memory of the transmitter.
The curve-fitting algorithm uses quadratic segments of varying length and curvature, and
includes diagnostics to estimate curve fitting errors. The program is self-prompting, avoiding
the need for detailed printed instructions.
To get started, download curve.exe from our website into the directory that will also contain
your data files, such as c:\curves. Connect your transmitter to the PC and double-click on
curve.exe, which is an executable file. Follow the computer prompts and extensive help
information. Pressing R (Enter) returns to the main menu. You will be given the choice of four
data entry modes, which are explained in detail.
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- LTE: Ethernet & 4-20 mA Output Transmitter for Average Time of Periodic Events (5 pages)
- LTE: Ethernet & 4-20 mA Output Transmitter for Time of Single or Accumulated Events (4 pages)
- LTE: Ethernet & 4-20 mA Output Transmitter for AC Phase Angle & Power Factor (4 pages)
- LTE: Ethernet & 4-20 mA Output Transmitter for Ratio (5 pages)
- LTE: Ethernet & 4-20 mA Output Transmitter & Totalizer for 0-1 mA, 4-20 mA or 0-10V Signals (4 pages)
- LTE: Ethernet & 4-20 mA Output Transmitter for Dual Channel Pulse Totalizer Input (4 pages)
- LTE: Ethernet & 4-20 mA Output Transmitter for Frequency, Rate or Period Input (4 pages)
- LTE: Ethernet & 4-20 mA Output Transmitter for Resistance in Ohms (4 pages)
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- LTE: Ethernet & 4-20 mA Output Transmitter for Process Signals (4 pages)
- LTE: Ethernet & 4-20 mA Output Transmitter for AC RMS Voltage or Current (4 pages)
- LTE: Ethernet & 4-20 mA Output Transmitter for DC Voltage or Current (4 pages)
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