Precautions And Preparations For Measurement - Extech Instruments K.J.E.T. 422324 Instruction Manual

IV. PRECAUTIONS AND PREPARATIONS FOR MEASUREMENT
1. Before use, examine the device to ensure that no shipping damage
has occurred.
2. Save all packing materials.
3. Ensure that the batteries are correctly placed in the case or that the
9V adaptor is correctly connected.
4. An unsecured battery cover can cause measurement error.
5. To avoid battery leakage, remove batteries if this meter will not be
used for a long period of time.
6. Do not use or store this meter outside the operating or storage
environmental specifications.