Vaisala HM40 - Manual (Page 4)

3
First Startup
1.
Check that the HMP113 probe is securely attached and
remove the yellow transport protection cap from the
probe.
2.
Open the battery cover and insert two AA-size
batteries.
3.
Close the battery cover and turn on the meter by
pressing the Power button. If the meter does not turn
on, check the battery orientation. Replace the batteries
with fresh/recharged ones if needed.
Initial Settings
When you power on the HM40 for the first time (or after
a factory reset of the settings), you must first select the
operation language. The meter will then ask if you want to
change the following settings:
- Units
- Date
- Time
If you answer Yes to the question (recommended), the
meter will show the settings screens before showing the
measurement view. Use the arrow and function buttons to
select. For more information, see section Settings
Submenu on page 24.
HM40 will retain the date and time even during
battery changes. The clock will have to be set
again only if the meter is without battery power
for several hours.