It is important that all transceivers in a group are checked for proper functioning before starting a trip or task to ensure all units have the capability to send and receive a signal. There are several different transceiver checks.
The battery test should be performed as soon as the transceiver is turned on. The recognized standard for avalanche transceivers requires that the device can still send a signal for a minimum of 24 hours, and perform in search mode for a minimum of two hours, even at 0% indicated battery strength. The search function uses considerably more power, so it is important to have a good power reserve in case a long search is required. When choosing batteries for your transceiver, consider the following:
A full function check can be performed quickly and has the benefit of ensuring all transceivers are properly functioning in transmit and receive modes. It should be performed at the start of each trip or operation. For multi-day trips with the same group, the full function check does not need to be performed daily.
Checking the transmit function is critical because it confirms that each transceiver is switched on and transmitting a signal. It is performed daily, and should be repeated when necessary (e.g. after a search exercise, change of clothing, new members joining a group, or any situation when the transceiver may have been turned off).
The procedure for a transmit check depends on the type of transceiver and whether or not it has a group-check mode. This special mode checks for full output strength of the signal at close range and is equivalent to a full function check.
Procedure for transceiver with a group-check mode:
Procedure for transceiver without a group-check mode: