Omega Speaker Systems Rercorder RD8300 - Manual (Page 82)

Section 5 – Recorder Setup
Page 73
09/11/2008 REV 0.99
5.7.2.2 Modbus Settings
This is only applicable if the serial port option is installed in the unit. Modbus is a communication protocol
which runs over RS232 (single unit) or RS485 (multiple units). The ID uniquely identifies the device in a
multidrop environment and can be set from 1 to 255. Note that this does not imply that 255 units can be
on line at a time. The limit is usually 32 to 64. The Baud Rate is the serial communication speed which
must match that of the host controller. This can be set from 9600 to 115200 baud.
5.7.2.3 Mouse Pointer Enable
Check this Enable checkbox if you plan on using an external mouse or other pointing device. This will
keep the mouse pointer or cursor visible at all times. Note: This setting only takes effect AFTER you
power down the unit and restart it.
5.7.2.4 Config Auto Save
Check this Enable checkbox to have the Configuration file saved automatically each time a change is
made to the unit configuration. If you are setting the system up for the first time you can disable this
feature by unchecking this box so the process is a little quicker, however DO NOT FORGET TO SAVE
THE CONFIGURATION using the
Quick Save button in the Utility Setup Menu.
5.7.2.5 Menu Timeout
The Menu Timeout sets the time in seconds after which any menu visible on the screen will collapse and
the display will revert back to the live display. Select 60 to 300 seconds from the dropdown box.
5.7.2.6 50/60 Hz Filter
In noisy environments the AC mains frequency interference can affect the readings on the most sensitive
(millivolt) ranges when running at sample rates asynchronous to the AC mains frequency. If the sample
rate can be made to run synchronously with the AC mains frequency, the noise effect of that frequency is
minimized because the recorder has differential inputs and samples at the same place on AC wave for
every sample. This does however place a limit on what the sample rates can be. The common
denominator for 50 and 60 Hz is a sample rate of 16.66 samples per second to eliminate the AC hum.
This means that the fastest sample rate to meet this requirement is around 1.5 to 2.2 samples per second
depending on the number of analog input channels in the recorder. Checking the box will activate the filter
but will limit the maximum sample rate irrespective of what is selected elsewhere. This is usually not an
issue for thermocouples and RTDs which are typically the most affected by AC noise.
5.7.2.7 Unit Tag
The Unit Tag identifies the recorder. It appears in the task bar and all data files. Enter up to 22
characters. The unit tag is Process Recorder in the figure
above .
Once the changes have been made press the accept button to exit or the cancel button
to quit without saving the changes.
5.7.3 Date/Time Setting
Tapping the Date/Time icon shown left will bring
up the Date/Time dialog. Here the user can set
the current Date, Time and Time Zone as well as
the date format
To change the time – tap on the hour, min, secs accordingly
then adjust using the up and down arrow keys. Select the
current time zone from the pull down menu
Fig 5.7.3 – Date – Time Setup