Omega Vehicle Security OM-550 manual Math PSEUDO-CHANNEL

Page 31

4.5 MATH PSEUDO-CHANNEL

The OM-550 has five physical channels and a sixth "channel" that can display the result of a math operation involving any two of the other channels (or a single channel, twice). The channels chosen as a basis for the Math channel are its "constituents".

The Math channel can be activated or "skipped" during programming. Math channel data will be printed only (not stored to RAM) if it and both constituent channels are active (not skipped). If the Math channel is active, its data will be printed (and included in the "run statistics") with data from the other channels, as channel #6 (refer to section 2.4.2 STATISTICS).

To inhibit the Math channel, program it as Skipped or program it as the combination of at least one other Skipped channel.

The Math channel can be used to multiply another channel by a constant or add a constant to another channel. For example, if channel 1 is a Type K Temperature channel and the user wants to log CH 6=CH 1+10°C, then

∙Program CH 5 as a Voltage channel: m=0.00000, b=000100, dp=1, units=00

∙Program CH 6 as CH 1+CH 5*

(*Other math functions can be used for desired results).

Now channel 5 will always be logged as 0010.0, regardless of the actual input voltage, and channel 6 will be logged as CH 1+10. Refer to section 4.14.4 DATA SCALING (mX + b calculation) for more information about m and b.

The format rules for printing Math channel data are the same as for other channels; a "******" will be printed if the value exceeds the available space or the decimal position selected during programming. Refer to section 4.2 PRINT FORMATTING for more information.

Although Math channel data may be calculated and printed, it is not actually stored in the cache memory. When the cached data is transferred to a PC, the software recreates the Math channel data as necessary. This has one limitation: only one cache- full of data can be sent to the PC. If more data than will fit in the cache is logged, then the oldest data is lost and the Math channel statistics (printed on STOP) will be based on data unavailable to the PC. If this is a problem, program the OM-550 to stop logging when the cache is full.

OM-550

u26u

Image 31

Contents Table of Contents Date Time ∙ The OM-550 Datalogger may be referred to as Logger IntroductionProduct Usage Warnings Operator Safety InformationFor protection of the OM-550 itself, observe the following Unpacking OM-550 Features FeaturesOM-550 features Activity LED & Horn Keypad ∙ ON-OFF ∙ RUN ∙ PROG/EXIT ∙ Stop∙ OK ∙ Optional Connectors Channel ConnectorsApplication To remove the Viewing Window Printer WindowSerial Data Port Battery CoverThermal Paper DC JackTilt Stand Gain AdjustPower Supplies Probe SET InputsVoltage Transducer Inputs ProbesType Thermocouple InputsData Cache Programmed FeaturesStatistics LOW Battery Operation POWER-SAVE ModeBattery Check Battery Installation Power ConnectionConnecting the DC Power Cable Connecting the AC Power AdapterPaper Installation PIN Adapter Data Port Connection∙ Programming outline 1. Select Channel ProgrammingProgramming Keys Position Print FormattingVoltage Channels Temperature ChannelsMath PSEUDO-CHANNEL This Interval Overrun can be avoided in two ways LOG IntervalNot Printing Operation AT Full Cache Recording Time Rejection Frequency Temperature UnitsTo return to Normal mode Calibration ModeTadjust R1 = 2 R2 = V-2 Voltage Input ScalingMatching Transducers to the OM-550 Matching a Voltage Transducer= 2.0000 VDC = R1 Matching a Current TransducerR1 = 2 Data Scaling mX + b calculation Matching and Scaling a Voltage Transducer VDC Example Matching and Scaling a Current TransducerU38u Unit Labels Programmed Information OperationLog Interval Time Temperature Units Enter a Tadjust value, or press OK to finish programming U44u Manual Reset programs the OM-550 as follows Appendix a Calibration ∙ Manual Reset∙ Performing a Manual Reset Setup ∙ Calibration Procedure∙ Thermocouple Adjustment Procedure ∙ Voltage Adjustment ProcedureTo return to normal operation ∙ Exiting CAL ModeVoltage Measurement Inputs Appendix B SpecificationsAccuracy Conversion PrinterPaper Life Digital Interface RS-232Connectors POWER/CURRENT RequirementsBattery Life Physical DimensionsOM-550 DOS Software Table of Contents Introduction How to Use This ManualFonts Used in this Manual Printer CPU, RAM, Hardware∙ Hard Drive Installation Software InstallationTo start the program Starting the ProgramMaster Menu Reading Data from the OM-550 To load a LOG file Load Existing LOG FilesModify Software Configuration U6u To list data List Data on MonitorTo save data as text Print Data on PrinterSave Text File To print dataTo edit a plot label Edit Plot LabelsHOT Plot Status BAR To Magnify a portion of the Data Graph Magnify ToolMagnify MAP Magnified Area Axis Labels To select a channel to graph Channel DataTo link plot lines Channels 4 & 5 After Linking Data Graph ∙ X-Data Cursors ∙ Data Plots∙ X-Cursor Data Table To activate the Help menu Help MenuTo list log files List Existing LOG Files on PrinterTo quit Appendix a KEY Functions