Vaisala HM70 - Manual (Page 15)

Chapter 3 ____________________________________________________ Preparations Before Use
VAISALA _______________________________________________________________________ 13
CHAPTER 3
PREPARATIONS BEFORE USE
Installing and Recharging the Batteries
1. If you are using alkaline batteries, remove the back plate of the
indicator and insert the batteries. If the HM70 is ordered with a
rechargeable battery pack, it is already in place as shipped from
the factory.
2. Recharge the battery pack as follows: Plug in the recharger
connector to the base of the indicator and connect the recharger to
a wall socket. A battery symbol in the corner of the display starts
to roll.
- It is not recommended to use HM70 during the first recharging.
After the first charge cycle is complete, you can use the HM70
while recharging.
- The duration of recharging depends on the charge level of the
battery pack. 4 hours is a typical recharging time. The
recommended first charging time is 6 hours.
3. When the battery symbol stops rolling, the battery is fully
recharged. Disconnect the recharger.