Kestrel 4400 Instruction Manual

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4400 Heat Stress Tracker

I NS TR UC TI ON AL M AN UA L

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2 3

Guidelines ..............................................................................4

Wet Bulb Globe Temperature ............................................4

Thermal Work Limit ..............................................................6

Vane Mount Assembly................................................... .... ...9

Data Logging........................................................................10

Glossary ................................................................................10

Maintenances & Services....................................................12

Warranty................................................................................13

OVERVIE W

NK, manufacturer of Kestrel Pocket Weather Trackers, is available to answer questions and provide support. Contact NK by phone: 610.447.1555; fax: 610.447.1577; email: info@NKhome.com; or NKhome.com

To maximize the accuracy and reliability of your readings:

• Ensure that your Kestrel Tracker is in good repair and within factory calibration.

• Take readings frequently and carefully according to the guidelines above.

• Allow your meter’s readings to stabilize after signicant changes in temperature or humidity (ie changing location from indoors to outdoors).

• Allow a margin of safety for changing conditions and reading errors (2-3% of reading is recommended).

To reduce the risk of injury or death to persons, read and follow these guidelines!

• Know yourself and the individuals and items you are responsible for.

• Where appropriate, seek the guidance of a medical professional.

• Know what to do in the event of heat illness.

• Be prepared with supplies to treat heat illness.

• Have and practice a heat illness action plan.

CAUTION

Your Kestrel Weather Tracker is an environmental meter, not a medical device. It is only one source of

information and must be employed with care and good judgment.

WARNING

Your Kestrel brand Weather Tracker is designed to provide accurate measurement of current conditions

only. Depending on your location and environment, conditions may change rapidly.

Rapid temperature and humidity changes (ie moving your meter from indoors to outdoors) may cause inaccurate readings of temperature and humidity as well as all readings which rely on either of these values. Before relying on a Kestrel Weather Weather Tracker readings, use care to either a) force air ow over the sensors by waving or slinging your meter through the air; or b) wait until your unit’s readings have stabilized, indicating it has equilibrated to its new environment.

Use extra care and good judgment when referring to your Kestrel Weather Tracker to make any

decisions regarding safety, health or property protection.

The Heat Stress, Wind Chill and Thermal Work Limit indices are published indices developed by the National Weather Service to provide decision guidance based on average human physiological response. Certain individuals, animals, equipment or property may be more susceptible to harm relating to environmental conditions, requiring additional precautions. For example, very young or elderly individuals, individuals with asthma or sickling trait, and individuals who have not become acclimated to hot conditions are likely to be more prone to heat illness, heat exhaustion, heat stroke or death.

Shop for Kestrel products online at:

1.877.766.5412

www.Weathe rMete rs-Dir ect.com

4 5

Measuring

The unit will calculate and display Wet Bulb Globe Temperature based on Globe Temperature, Relative Humidity, Ambient Temperature, Barometric Pressure, and Wind Speed.

WBGT in F

73 . 2

No ag

settings

To Change WBGT settings:

• Press while on the Wet Bulb Globe Temperature screen.

• Use or to change the “Type” setting between outdoor and indoor, (see glossary for more info).

• Use to scroll to “App”, then use or to change the Application.

• Press to exit the WBGT settings screen.

Note: Flags for WBGT are listed in gure 1 (page 6). If red or black ags are displayed, the number will ash to alert the user with the screen contrast inverting. Unless the screen says “No ag”, the ag color will ash. See below screenshots for examples of inverting screen contrast. For information on work/rest ratios and water consumption refer to Figure 1.

GUIDELI NES FOR USE WET BUL B GLOBE TEMPERATURE

The Kestrel 4400 Heat Stress Tracker will only yield accurate measurements using the following guidelines. It is important that the 4400 be fully acclimated to the measurement environment for accurate readings.

Proper Placement The Kestrel 4400 Heat Stress Tracker should always remain 3 feet from the ground. If the 4400 is laid on the ground, it will compromise the measurements of user’s conditions. To ensure proper placement, use the Kestrel Compact Collapsible Tripod and the vane mount (included).

Optimal Acclimating Time

If taken from a cool climate, where the Kestrel 4400 Heat Stress Tracker was stored, to an outside heat stress climate, the unit will need to adjust accordingly. Give the unit a minimum of 7 minutes to adjust to the outside climate if taken from storage (examples: air conditioned building, car glove box, truck gearbox, etc). 10 minutes of acclimatization time is recommended. If worn on the person without the Black Globe exposed, the Kestrel 4400 Heat Stress Tracker will need at least 2 minutes to display accurate measurements (examples: jeans pocket, shirt pocket, etc).

Repeat Measurements

When transporting the 4400 with the intention of taking repeat measurements, such as on a hike or march, try to keep the unit exposed as much as possible. A Kestrel Belt-Clip Carry Pouch or MOLLE-Compatible Tactical Carry Pouch is ideal for this purpose as the Black Globe sensor remains exposed to the air.

Note: the cautions and risks of using the Kestrel 4400 Heat Stress Tracker aforementioned in these instructions. Use other factors such as amount of work being completed or distance of land traveled when making judgments on heat stress and personnel capabilities.

WET BUL B GLOBE TEMPERATURE  CON'T

Figure 1: Work/Rest ratios and Water Consumption Guidelines. (Source: U.S. Army Center for Health Promotion and Preventive Medicine Health

Information Operations Division. URL: http://safety.ucanr.org/les/2091.pdf)

• The work/rest times and ﬂuid replacement volumes will sustain performance and hydration for at least 4 hrs of work in the speciﬁed heat category. Fluid needs can vary based on individual differences (± ¼ qt/hr) and exposure to full sun or full shade (± ¼ qt/hr).

• NL = no limit to work time per hr.

• Rest = minimal physical activity (sitting or standing) accomplished in shade if possible.

• CAUTION: Hourly ﬂuid intake

should not exceed 1½ qts.

Daily ﬂuid intake should not

exceed 12 qts.

• If wearing body armor, add 5°F to WBGT index in humid climates.

• If doing Easy Work and wearing NBC (MOPP 4) clothing, add 10°F to WBGT index.

• If doing Moderate or Hard Work and wearing NBC (MOPP 4) clothing, add 20°F to WBGT index.

Work/Rest and Water Consumption Table

Applies to average sized, heat-acclimated soldier wearing BDU, hot weather. (See TB MED 507 for further guidance.)

Heat

Kestrel 4400 Instruction Manual

Specifications and Main Features

Frequently Asked Questions

User Manual