Heat Stress Trackers KESTREL 4400 & 4600 INSTRUCTIONAL MANUAL AVAILABLE WITH WIRELESS DATA TRANSFER NKhome.com 800.784.
OVERVIEW ! CAUTION Features & Options..........................................4 Getting to Know Your Kestrel .......................5 Your Kestrel brand Weather & Environmental Meter is designed to provide accurate measurement of current conditions only. Depending on your location and environment, conditions may change rapidly. Getting Started................................................
Features & Options GETTING TO KNOW YOUR KESTREL FRONT Measurement Icon Units of Measure 4400 4600 Wind Speed | Air Speed mph | fpm | Bft | m/s | km/h | kt • • Wind Direction Cardinal Points, Degrees Crosswind Calculation mph | fpm | Bft | m/s | km/h | kt Headwind | Tailwind mph | fpm | Bft | m/s | km/h | kt Temperature* ˚F | ˚C • • Wind Chill ˚F | ˚C • • Relative Humidity Gpp | G/kg • • Heat Stress Index ˚F | ˚C • • Globe Temp ˚F | ˚C • • Naturally Aspirated Wet Bulb Temp ˚F | ˚C •
GETTING STARTED Battery Installation • I nsert batteries into bottom of Kestrel unit as shown on battery door. • Snap door closed. KESTREL 4600: AAA batteries have a magnetic signature strong enough to affect the Kestrel compass readings. Please follow this extra step to ensure the batteries stay in proper orientation. Before closing the door, push the plastic shim (provided with unit) between batteries and place clear ring on end over positive battery “bump.
Screen Navigation Measurements Use this setup to “hide” unwanted Measurement screens from the normal Measurement navigation. or to scroll to the desired Measurement screen. • Use • Press or to turn screen “On” and “Off”. T he Kestrel Meter will continue to log data for hidden measurements. To view logged data of the hidden measurement, go to Measurement setup, select the Measurement screen you want to view, and turn it back “On.
MEASURING HEAT STRESS The Kestrel Heat Stress Trackers will only yield accurate measurements using the following guidelines. It is important that the meter be fully acclimated to the measurement environment for accurate readings. SIX USER-SETTABLE WARNING ZONES The Kestrel Heat Stress Trackers allow you to customize the settings of your heat-related warning zones based on your specific needs. es Proper Placement The Kestrel Heat Stress Trackers should always be used at least 3 feet from the ground.
Figure 6 Figure 4 GUIDANCE FOR ATHLETIC TRAINERS Work/Rest and Water Consumption Table Applies to average sized, heat-acclimated soldier wearing BDU, hot weather. (See TB MED 507 for further guidance.) Easy Work Moderate Work • Weapon Maintenance • Walking Hard Surface at 2.5 mph, < 30 lb Load • Marksmanship Training • Drill and Ceremony • Manual of Arms • Walking Loose Sand at 2.5 mph, No Load • Walking Hard Surface at 3.
THERMAL WORK LIMIT (TWL) (4400 ONLY) Measuring The unit will also display a measure of human heat stress known as “Thermal Work Limit,” or “TWL.” TWL is based upon Globe Temperature, Relative Humidity, Ambient Temperature, Barometric Pressure, Wind Speed, and parameters specific to the population using the Thermal Work Limit measurement. These parameters are the Intrinsic Clothing Insulation Factor (IClo), Vapor Permeation Factor (VPF), Position of the body (Pos), and surface area of the person (Area).
BLUETOOTH® SETUP BAROMETRIC PRESSURE & ALTITUDE SETUP BLUETOOTH SETUP (BLUETOOTH ENABLED METERS ONLY) To transfer your Kestrel’s real-time and logged data wirelessly and automatically to a laptop or PDA, follow these set up steps. Enable the Kestrel’s BLUETOOTH Capability • Press to enter the Main Menu. • Use or to highlight “Bluetooth,” then press . • Use or to change from “Off/Disabled” to “On/Ready”. Set BLUETOOTH Range In Bluetooth screen: • Use or to highlight “Range”.
IMPELLER REPLACEMENT COMPASS CALIBRATION (4600 ONLY) Replacing the Kestrel impeller In addition to Wind Speed and Wind Chill, the Kestrel 4600 also measures Direction, Headwind/Tailwind and Crosswind. ress only the sides of the impeller when removing and inserting to avoid damaging the precision P hub bearing. (Figure 1) . •P ress FIRMLY on the impeller module to remove it.
VANE MOUNT ASSEMBLY Measuring Direction T he Kestrel 4600's digital compass must be vertical to achieve accurate readings. Keep the unit positioned as close to vertical as possible when using any compass-related feature. After opening the battery door, you must re-run the calibration routine or readings will not register. For maximum accuracy, the impeller should be spinning while measuring to eliminate its magnetic pull. True North vs.
DATA LOGGING AND MIN/MAX/AVERAGE When Autostore is on and the unit is off, the heat stress measurements will not be stored because they use calculations that cannot be performed without power. When reviewing data in the graphical display, the symbol “–“ will appear at the top of the display for any points not logged due to the above condition. In wind-related measurements, a timer will appear at the bottom of the screen after starting the MMA feature – this timer displays the elapsed time.
Maintenance & Service Maintenance & Storage To avoid scratching the window, store the Kestrel Heat Stress Tracker in the soft pouch and/or use the Kestrel lens cleaning kit. Software To download the Kestrel Communicator software, visit: www.nkhome.com/kestrel-software. Calibrations, Certifications & Service Every NK product is tested and calibrated before it leaves our factory. We warrant that it will perform within specifications when you receive it.
5-Year Limited Product Warranty NOTES: 5-YEAR LIMITED WARRANTY Your Kestrel Heat Stress Tracker is warrantied to be free of defects in materials and workmanship for a period of FIVE YEARS from the date of its first consumer purchase. NK will repair or replace any defective meter or part when notified within the warranty period, and will return the meter via domestic ground shipping or NK’s choice of method of international shipping at no charge.
NIELSEN-KELLERMAN 21 Creek Circle, Boothwyn, PA 19061 Phone: (610) 447-1555 Fax: (610) 447-1577 Web: NKhome.com Email: info@NKhome.com Kestrel® Weather & Environmental Meters are designed and manufactured in the USA This device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) this device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation. NK#xxxx_1_13.3.
