14Industrial RadioThe operation procedures are as follows:1. Press [SCAN] while holding down [MONI] to lock keys.When keys are locked, [UP],[DOWN] and [SCAN] keysare inoperable, but [PTT] and [MONI] keys will stillfunction.2. Press [SCAN] while holding down [MONI] to unlock keys.3. lock symbol appears on LCD:222222222222222222222222222222 2Time Out Timer (TOT)Time Out Timer is to prevent user from transmitting on the samechannel for extended periods of time. This also protects the radiofrom damage caused by accidental transmissions.If transmission exceeds the preset time, (the TOT time can bepreset by the dealer), the radio will stop transmitting and returnto the receive mode. Alert beeps will sound to indicate the halt intransmission. Releasing the PTT button will cause the beepsstop. 2Battery SaveWhile no activity is on channel and no operation is performed for5 seconds, the Battery Save feature will automatically be switchedon to reduce power consumption. When a signal is received or anoperation is performed, the Battery Save feature is automaticallyswitched off.