MER-2040 Software Instruction Manual
003110UB.DOC
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<R>: RAW DATA IN HEX
This option is helpful in "debugging" problems in data files, or in examining exactly how data is
transmitted from the MER. The display shows, in hexadecimal, each byte that is recorded in
the data file. A new line will begin for each new record. If you wish to use this option, refer to
the programming and data decoding section of your MER hardware manual.
<V>: FORCE ALL READINGS TO VOLTS
Normally, M24-READ will display the various sensor readings in the engineering units specified
in the calibration file. For example, the voltage output of the pressure sensor is translated to
"meters" using the calibration information in the calibration file. If you preferred to display this
measurement in "dBars", then the calibration constants and the units field must be appropriately
changed in the calibration file (see Section 7.0). The <V> option will allow you to force the
displays to volts or frequencies, which are useful in troubleshooting applications. Displays will
continue in these units until the program ends or a calibration file is reloaded using Option <C>.
Note that the <V> option cannot be used on one-meter binned data, but after this option is run,
any binned data created will be in volts.
<Z>:
CLEAR THE MIN AND MAX R(ECORD) LIMITS
Option <Z> will clear the current start and stop record numbers so that you can access the
entire data file. These reading stops are continuously displayed on the main menu. The
default value for the final record number is 30000, which was selected with the assumption that
no file would be that big and that this would cause the file to be read to the end.
3.3
M24-READ GRAPHICS AND PLOTTING OPTIONS
M24-READ supports both screen and pen plotter graphics. Most of the graphics options are
organized so that you can first preview the plot on the CRT screen to optimize the scaling and
parameter selection. When the screen plot is satisfactory, then the plotting conditions can be
written to a data file, if desired, and a pen plotter dump can then be requested. The discussion
will start with requesting a plot like that produced by the Profile program (Figure E).
<B>
PACK A BINARY DATA FILE
This option creates one-meter averages for the data and, if desired, it stores the results in a
".PAC" data file on disk. The data will remain in this format for analysis until a new data file is
selected using the <F> command.
<C>
SELECT ANOTHER CALIBRATION FILE
To change the calibration file being used to decode the recorded data, select the <C> option
and select among the available *.CFL files. This option automatically forces you to respecify a
file.
WARNING:
If you choose a calibration file for any instrument configuration (i.e. number of
channels, etc.) other than the one that recorded the data, error may result.