User's Manual

Sensitech TempTale RF
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System Installation Manual Revision 8
Page 13
5. TempTale RF
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Datalogger
The TempTale RF
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Datalogger will travel with the cargo and continuously store temperature information
and a corresponding time stamp. The Datalogger will start operation when the “Start” button is
pressed.
The Datalogger also has two LEDs visible on the front panel; the greed LED blinks to indicate that the
Datalogger is operating, taking data points, while the red LED blinks to indicate an error or alarm
condition.
Until a Datalogger enters a TempTale RF
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network, it will remain in low power mode where it does not
transmit but instead wakes up on a specific time interval to collect data. Each time the Datalogger
wakes up, it also checks if it can ‘hear’ the RF signals from a TempTale RF
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infrastructure network. If it
does hear the RF signals, it communicates with the network. The Gateway can then determine what
information it needs from the Datalogger and send the appropriate commands.
Dataloggers also support a secondary download to a local PC using a Sensitech RF download cable. The
Datalogger can be downloaded using the Sensitech ColdStream or TempTale Monitor Download
application (TTMD).
The Datalogger and secondary download cable are pictured in the next section.
5.1. Datalogger Components
5.2. RF Auto-Roaming
The TempTale RF
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Gateway and Repeater infrastructure devices can be configured for operation at 868
MHz or 915 MHz, depending where they are installed. The Datalogger will automatically detect the
frequency of the infrastructure and switch to the corresponding frequency for the network detected.