OM-CP-RF Series Operations Manual
Omega Engineering, Inc.
Revised 04/07/05
Page 5 of 18
menu item, switch to the “Device Detail” tab, and click the “Wireless Configuration” button.
To edit the configuration, press the “Change” button in the dialog, make the appropriate
changes, then press the “Save” button to commit the changes to the device. Note: Closing
the dialog or exiting with the “OK” button will not store the changes in the device.
To comply with FCC regulations, saving a configuration change may cause the device to
inhibit output from the transmitter while the internal timers synchronize to the new
configuration (this may be the longer of the reading interval or custom transmit interval).
To force synchronization of the timers and enable output before the aforementioned interval
has passed, restart the device from the software.
Transmitter Output Modes
Real-time data transmissions may be sent through the RF antenna, the device’s serial
port, both or neither. If both the serial and RF transmitters are disabled, the device will
function strictly as a standard data logger. The typical user will configure the device for
wireless transmission only thus transmitting data from the device to the RFC101A receiver.
However, serial transmission may be desirable for some systems where the built-in
transmitter is not powerful enough to maintain a reliable link, the signal must be brought
outside of an environment that blocks RF, or when a hardwired connection to an alternate
transmitter is required. Additionally, both modes may be enabled for combined local and
long-distance monitoring of the signal. See “Increasing Range with the RFExtender” later in
this manual.
Transmitter Options
The transmitter module has four configuration options. Two of these options pertain to
enabling and disabling the transmitter under different operating conditions and two pertain
to the timing and format of the transmitted signal. These options are summarized below.
1.
Transmit only while logging
– If this option is selected, the transmitter will only
output data when the logger is recording data to memory. When memory is filled
and the device stops logging, the transmitter will stop as well to indicate the logger
needs to be offloaded and restarted. If the memory wrap-around mode of the logger
is enabled, the device will continue to overwrite the oldest internal data and continue
transmitting data wirelessly. If this transmitter option is not selected, the transmitter
will continue to operate regardless of whether the device is recording data.
2.
Transmit under switch control
– If this option is selected, the on/off switch may
be used to inhibit the transmitter output. This allows the user to manually stop the
transmitter without affecting the logger operation or transmission timing. This may
be useful for transporting the device through an area where other devices are
operating on the same frequency band, disabling the transmitter until the device is
placed in-system, or disabling individual devices to evaluate system performance and
troubleshoot interference or collisions. In systems where a manual override is not
desirable, this option may be left unchecked, and the transmitter will not be affected
by the position of the switch.
Note: The above two transmitter options function as such: if either one of the
modes would disable the transmitter under given conditions, the transmitter will be
disabled. For the transmitter to be enabled, the required conditions must be met for
both options to allow the transmission.
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