JRC JHS-207, Instruction Manual

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13.1.1. Inspect the battery connection pins, the gasket and the lock/release device.
13.1.2. Inspect the housing for defects regularly. This is important as defects can
affect water sealing.
CAUTION
Ensure that the antenna and jack cover are assembled correctly, if not
the radio is not waterproof.
13.2 Regular testing
It is important to perform regular testing of equipment to ensure proper operation.
This also ensures the radio is in good working order and therefore ready for use in a
potential emergency situation.
Important
Ensure you have a rechargeable battery available for use during testing to avoid
using a sealed lithium battery.
Testing should occur according to the requirements indicated in the on board
radio log.
To test, do the following:
13.2.1. Use the rechargeable battery.
13.2.2. Turn the radio on and choose an appropriate channel other than 16.