Kestrel 4000 Instruction Manual page 26

Kestrel 4000 Pocket Weather Tracker
® ®
accurate temperature and humidity readings. You can ensure airflow by either placing the Kestrel Meter in
a breeze, or by waving it back and forth. If no airflow can be provided, you must allow up to 20 minutes for
the values to stabilize and accurate readings to be displayed.
Can my Kestrel Meter measure water speed by placing it in wind speed mode and submerging it?
Even though your Kestrel Meter is fully waterproof and can be submerged without damage, the viscosity
of water is different than that of air. The Kestrel Meter will display a value, but the readings will not be the
accurate water speed.
Why does my screen turn black in the heat? Why does screen become sluggish or blank in the cold?
The liquid crystal display used in Kestrel Meters has an operational temperature range of –14.0 to 131.0°F
(–10.0 to 55.0°C). Above this temperature, the whole screen will turn black. Below this temperature, the
liquid crystals will freeze and not display a reading. Even in these conditions, your Kestrel Meter will still
continue to measure and record readings as specified by the automatic and manual data storage rates,
you will just not be able to read the display until the environment's temperature is within the operational
range. In cold environments, you can keep the Kestrel Meter warm in your pocket and remove it only to
take readings. Be sure to wave the unit back and forth to create airflow over the sensors to ensure the most
accurate reading possible.
Why doesn't my Kestrel Meter match the local Weather Report?
Obtaining a weather report from a local television station, airport or internet site will give you the weather
where those instruments are, which is not necessarily the same as where you are. Your Kestrel Meter is
measuring the conditions right where you are. The nature of microclimates and weather fronts is that they
are varied, and even locations as close as a mile apart can have different weather readings. You can certainly
use these weather reporting services for good estimates of what the conditions will be, but for the most
accurate readings at your particular location, the Kestrel Meter is better.