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Chapter 6 Troubleshooting and Instrument Maintenance
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6.2 Maintenance

This instrument is powered by four AAA batteries. For
long period use, 5V/1A adapter is recommended to
avoid low battery.
 If a mobile phone adapter is used for power supply,
make sure that its output current is 1000 mA.
 This instrument is not waterproof, so do not use it in a
high-moisture environment.
 Avoid placing this instrument in an unstable position
or where it may be affected by violent shocks.
 Avoid placing this instrument outdoors or in a place
with high moisture, dust, direct sunlight, or any heat
sources.