Kestrel
®
4500 Pocket Weather
®
Tracker
System
The display Contrast and Auto Shutdown can be reconfigured as required. The relative humidity and
pressure sensors can also be recalibrated. Press the or
buttons to highlight the appropriate
selection, and the or button to adjust or select.
The Contrast can be adjusted for better visibility depending on the ambient lighting conditions. Press
the or button to increase or decrease the contrast from 0 to 20 (0 is lightest, 20 is darkest).
The display can be set to automatically turn off in order to conserve the battery life. Auto Shutdown will
only occur after the preset time has elapsed without any button presses. Press the or button to scroll
through the Auto Shutdown options (15 minutes, 60 minutes, Off). Battery life will be shortened if the
Auto Shutdown is turned to Off.
Baro Cal -
Recalibration of this sensor is not typically required, and it is not recommended that you recalibrate
without speaking to an NK technician.
The pressure sensor can be calibrated if necessary. It is extremely
important to know the precise altitude and mean sea level barometric pressure at the time of calibrating
the sensor. First, set the reference altitude on the BARO measurement screen to the known altitude
(see Pressure Adjustment section for instructions). Then adjust the calibrating setting on the Baro Cal
screen to the known mean sea level barometric pressure. If recalibration is desired, the unit may also be
returned to NK for service.
Humidity Cal -
Recalibration of this sensor is not typically required, and it is not recommended that you
recalibrate without speaking to an NK technician.
The humidity sensor can be calibrated by “teaching” it
the correct humidity. Some special equipment is required for this calibration, including two hermetically
sealed containers and saturated salt solutions. NK offers a calibration kit, and instructions are available
on www.nkhome.com. If recalibration is desired, the unit may also be returned to NK for service.
