MER-2040 Software Instruction Manual
003110UB.DOC
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<H>
HARD COPY DUMP
This option will print selected parameters in engineering units on your printer. The selected
channels are those specified in the DEFAULTS.CFG file. Other printed dumps of all channels
can be obtained using the <PRTSCRN> key function during the desired CRT display.
<I>
I/O CONTROL
This option allows you to program the MER to set various parameters including turning the
pump on and off, turning the fluorometer on and off, arming and firing the rosette, and changing
the number of averages, samples and delay in the instrument.
<L>
LOG A CALIBRATION RUN
This option calculates the average, standard deviation, minimum, maximum and raw voltages of
a range of channels on the instrument. After the instrument, channels to be sampled and
number of samples to be taken have been chosen, the program calculates the values and
displays them. It then offers the choice to write the values to disk, normalize them, repeat the
calibration run, repeat test without change to normalization, or exit to the main menu.
<O>
VIEW ONE CHANNEL ONLY
The <O> option presents you with a list of the available channels. This list will include both the
"real" and the computed or derived pseudo channels. For example, salinity is a derived channel
since the salinity measure is derived from conductivity, temperature, and depth. The channel
display shows the instrument number, the channel number, the channel label, the raw units
(volts or frequency), the computed parameter, calibration data applied, and the units of
measure.
<R>
DISPLAY RAW DATA IN HEX
This option is helpful in "debugging" problems in data files or in the data scan transmitted from
the MER. Each byte is displayed in hexadecimal. A new line will be begin for each new
record/scan.
<S>
STATUS BYTE DISPLAY
This option will quickly read the recorded data and display the contents of the "status byte" that
is transmitted by the MER with each data scan. Reviewing this will allow you to see if the
recorded data has transmission errors or power dropouts, which will block power-ups (see the
programming and data recording section of your MER hardware manual).
<T>
TEST THE DATA TRANSMISSION
This option is provided to quickly scan the data from the instrument looking for transmission
errors as detected by either a checksum or header error, and to measure the instrument cycle
rates. The display will show the buffer pointer, which is the number of data characters in the
