Chapter 8. Maintenance and Troubleshooting
Model PM880 Portable Hygrometer User’s Manual 153
8.10.3 Charging the Battery Pack
1. Plug the pack into the battery charger.
2. Connect the charger to AC power. When power is applied, the amber
LED glows and the charger automatically begins charging the pack.
3. The pack is fully charged when the amber LED goes out
(approximately 4-5 hours).
IMPORTANT: When you receive your unit, you should charge the battery
pack completely before using it for the first time.
4. Remove the pack from the charger and reinstall it in the PM880. Refer
to Checking the Battery Status on page 133 for details on monitoring
the battery.
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