Vaisala HM70 - Manual (Page 69)

Chapter 13 _____________________________________________________________ Maintenance
VAISALA _______________________________________________________________________ 67
CHAPTER 13
MAINTENANCE
Changing the Filter
1. Remove the dirty filter from the probe; see Figure 2 on page 11. Do not try to clean
the filter. Avoid touching the sensor.
2. Install the new filter.
Changing the Battery Pack
A new rechargeable battery pack can be ordered from Vaisala. Change the battery pack as
follows, and refer to Figure 9 on page 68:
1. Open the back plate of the indicator by opening the screw of the back plate.
2. Remove the old battery pack. Detach the black connector by pulling up carefully from
the wires.
3. Connect the black connector of the new battery pack, ensure that the position of the
connector is as indicated in figure (red and black wires are on the upper edge of the
connector). Do not push the connector with conducting material, e.g. metallic
screwdriver.
4. Place the battery pack, close the back plate and tighten the screw.
5. Charge the battery pack before use; see page 13.
In case you are installing battery pack and you have a device with alkaline batteries,
remove the metal contact before installing the battery pack.