Vaisala HM40 - Manual (Page 14)

13
Indicators
Battery charge indicator
Fresh batteries will always show three
bars.
When the indicator shows two bars, the
voltage of the batteries has started to
drop. When there is a single (blinking)
bar left, you should replace the batteries.
The meter will turn off automatically
when the battery voltage drops too low.
Alert indicator
This indicator is shown next to the
battery charge indicator if there is a
measurement problem. The most likely
causes are low battery and probe
problems, for example:
- Battery voltage too low to power the
probe. The measured values may show
asterisks "*" instead of numbers.
- Probe has been disconnected
- Probe has been damaged
- Probe is incompatible
Parameter indicator
The selected parameter is highlighted by
a light frame. The symbol on the right
stands for all parameters.
For the list of parameters, see section
Parameters Explained on page 11.