13.1 BATTERY CONDITION – The battery condition is tested at switch ON and after each activation. If it is found to be low it gives a distinctive double descending tone warning that is also transmitted to the Rx-D. Replace the battery as soon as possible. Replacing a battery - Disconnect the battery and press both PBs for 2 seconds. Fit the replacement battery and the Txi-D will switch ON automatically. Replacing a battery does not affect anything memorised.
