Manual - Global Test Supply

Manual - Global Test Supply
Certificate of
This instrument was produced under rigorous factory production control and documented
standard procedures. It was individually inspected and leak tested and the functioning of the
display, backlight, buttons and firmware were verified. The accuracy of each of its primary
measurements was individually calibrated and /or validated according to documented standard
test procedures against the standards detailed below. This instrument is warrantied to perform
at the date of first consumer purchase in compliance with the published specifications, including
stated drift since the date of manufacture, for the specific measurements and features of its model
number. (See Kestrel Limited Warranty for full warranty terms.)
Standards Used in Testing
Wind Speed:
The Kestrel Weather & Environmental Meter
impeller installed in this unit was individually
tested in a subsonic wind tunnel operating at
approximately 300 fpm (1.5 m/s) and 1200 fpm
(6.1 m/s) monitored by a Gill Instruments Model
1350 ultrasonic time-of-flight anemometer. The
Standard’s maximum combined uncertainty is
±1.04% within the airspeed range 706.6 to
3923.9 fpm (3.59 to 19.93 m/s), and ±1.66%
within the airspeed range 166.6 to 706.6 fpm
(0.85 to 3.59 m/s).
Temperature response is verified in comparison
with an Ametek DTI-050 Digital Temperature
Indicator and STS Reference Sensor. The
DTI-050 is calibrated annually and is traceable
to NIST with a maximum relative expanded
uncertainty of ± 0.40C.
Direction / Heading
magnetic field output. The compass output is
accurate to within ± 5 degrees as compared to a
Suunto KB-14/360R G precision compass.
Relative Humidity:
Relative humidity is verified in comparison with
an Edgetech HT120 Humidity Transmitter. The
HT120 is calibrated annually and is traceable
to NIST with a maximum relative expanded
uncertainty of ±1.0%RH.
Barometric Pressure:
Pressure response is verified against a Vaisala
PTB210A Digital Barometer. The Vaisala
Barometer is calibrated annually and is traceable
to NIST with a maximum relative expanded
uncertainty of ± 0.3hPa.
Approved By:
Nils Steffensen, Director of Engineering
The sensitivity of the magnetic directional sensor
is verified after assembly by orienting the unit
to the cardinal directions and confirming the
© 2016. The enclosed Kestrel Weather & Environmental Meter was manufactured by Nielsen-Kellerman Co. at its facilities located at 21 Creek Circle, Boothwyn, PA 19061 USA.
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Product Specifications for Kestrel 5 Series Weather/Environmental Meters
Larger of 3% of reading,
least significant digit or 20
0.1 m/s
1 ft/min
0.1 km/h
0.1 mph
0.1 knots
1 B*
0.1 F/S*
0.6 to 40.0 m/s
118 to 7,874 ft/min
2.2 to 144.0 km/h
1.3 to 89.5 mph
1.2 to 77.8 knots
0 to 12 B*
1 inch|25 mm diameter impeller with precision axle and low-friction Zytel® bearings. Startup speed stated
as lower limit, readings may be taken down to 0.4 m/s | 79 ft/min| 1.5 km/h | .9 mph | .8 kt after impeller
startup. Off-axis accuracy -1% @ 5º off-axis; -2% @ 10º; -3% @ 15º. Calibration drift < 1% after 100
hours use at 16 MPH | 7 m/s. Replacement impeller (NK PN-0801) field installs without tools (US Patent
5,783,753). Wind speed calibration and testing should be done with triangle on impeller located at the top
front face of the Kestrel. Measuring wind speeds above 60 m/s / 134.2 mph can damage the impeller.
*F/S only in Ballistics units. Beaufort not available in Ballistics units.
0.9 °F
0.5 °C
0.1 °F
0.1 °C
-20.0 to 158.0 °F
-29.0 to 70.0 °C
Airflow of 2.2 mph|1 m/s or greater provides fastest response and reduction of insolation effect. For
greatest accuracy, avoid direct sunlight on the temperature sensor and prolonged sunlight exposure to the
unit in low airflow conditions. Calibration drift is negligible for the life of the product. For further details,
see Display & Battery Operational Temperature Limits.
Relative Humidity
0.1 %RH
10 to 90% 25°C
To achieve stated accuracy, unit must be permitted to equilibrate to external temperature when exposed
to large, rapid temperature changes and be kept out of direct sunlight. Calibration drift is typically less
than ±0.25% per year.
1.5 hPa|mbar
0.022 PSI
0.01 inHg
0.1 hPa|mbar
0.01 PSI
20.67-32.48 inHg
700-1100 hPa|mbar
10.15-15.95 PSI
Monolithic silicon piezoresistive pressure sensor with second-order temperature correction. Between
1100–1200 mbar, unit will operate with reduced accuracy. Sensor may not operate above 1200 mbar
and can be damaged above 6,000 mbar or below 10 mbar. Calibration drift is negligible for the life of the
1/16th Cardinal Scale
0 to 360°
2-axis solid-state magnetoresistive sensor mounted perpendicular to unit plane. Accuracy of sensor
dependent upon unit’s vertical position. Self-calibration routine eliminates magnetic error from batteries or
unit and must be run after every full power- down (battery removal or change). Readout indicates direction
to which the back of the unit is pointed when held in a vertical orientation. Declination/variation adjustable
for True North readout.
Wind Speed | Air
Air Density
0.0002 lb/ft3
0.0033 kg/m3
0.001 lbs/ft3
0.001 kg/m3
Temperature, Relative
Humidity Pressure
Air Flow
1 cfm
1 m3/hr
1 m3/m
1 L/s
Air Flow,
User Input (Duct Shape
& Size)
typical: 23.6 ft/7.2 m
from 750 to 1100 mBar
max: 48.2 ft/14.7 m
from 300 to 750 mBar
1 ft
User Input (Reference
Barometric Pressure
0.07 inHg
2.4 hPa|mbar
0.03 PSI
0.01 inHg
0.1 hPa|mbar
0.01 PSI
User Input (Reference
Crosswind & Headwind/
1 mph, 1 ft/min,
0.1 km/h, 0.1 m/s,
0.1 knots
Wind Speed, Compass
Delta T
3.2 °F
1.8 °C
0.1 °F
0.1 °C
Temperature, Relative
Humidity Pressure
Density Altitude
226 ft
69 m
1 ft
Temperature, Relative
Humidity Pressure
Dew Point
3.4 °F
1.9 °C
15-95% RH. Refer to Range for
Temperature Sensor
0.1 °F
0.1 °C
Temperature, Relative
Evaporation Rate
0.01 lb/ft2/hr
0.06 kg/m2/hr
0.01 b/ft2/hr
0.01 kg/m2/hr
Wind Speed, Temperature
Relative Humidity
Pressure, User Input
(Concrete Temperature)
Heat Index
0.1 °F
0.1 °C
Temperature, Relative
Moisture Content |
Humidity Ratio (“Grains”)
0.1 gpp
0.01 g/kg
Temperature, Relative
Humidity Pressure
Probability of Ignition (PIG)
Max: 10%PIG
Accuracy dependent on
proximity to reference table
Temperature, Relative
Relative Air Density
Temperature, Relative
Humidity Pressure
Wet Bulb Temperature Psychrometric
3.2 °F
1.8 °C
0.1 °F
0.1 °C
Temperature, Relative
Humidity Pressure
Wind Chill
1.6 °F
0.9 °C
0.1 °F
0.1 °C
Wind Speed, Temperature
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Display & Backlight
Multifunction, multi-digit monochrome dot-matrix display.
Choice of white or red LED backlight.
Response Time & Display
Display updates every 1 second. After exposure to large
environmental changes, all sensors require an equilibration
period to reach stated accuracy. Measurements employing
RH may require longer periods particularly after prolonged
exposure to very high or very low humidity.
Data Storage & Graphical
Display, Min/Max/Avg
Logged history stored and displayed for every measured value.
Manual and auto data storage. Min/Max/Avg history may be
reset independently. Auto-store interval settable from 2 seconds
to 12 hours, overwrite on or off. Logs even when display off
except for 2 and 5 second intervals. Kestrel 5 series units hold
over 10,000 data points.
Data Upload & Bluetooth®
Data Connect Option
Wireless range up to 100ft. Connection requires optional USB
data transfer cable or Kestrel Link Dongle or Kestrel LiNK app.
Employs Kestrel Link protocol for data transmission with Link
supported devices. (Kestrel LiNK for iOS/Android, Kestrel Link
for PC/MAC).
Clock / Calendar
Real-time hours:minutes:seconds clock, calendar, automatic
leap-year adjustment.
Auto Shutdown
User-selectable – Off, 15-60 minutes with no key presses.
English, French, German, Spanish.
CE certified, RoHS and WEEE compliant. Individually tested to
NIST-traceable standards.
Designed and manufactured in the USA from US and imported
components. Complies with Regional Value Content and Tariff
Code Transformation requirements for NAFTA Preference
Criterion B.
Battery Life
AA Lithium, included. Up to 400 hours of use, reduced by
backlight or Bluetooth radio transmission use.
Shock Resistance
MIL-STD-810g, Transit Shock, Method 516.5 Procedure IV; unit
only; impact may damage replaceable impeller.
Waterproof (IP67 and NEMA-6)
Display & Battery
Operational Temperature
14° F to 131° F | -10 °C to 55 °C Measurements may be taken
beyond the limits of the operational temperature range of
the display and batteries by maintaining the unit within the
operational range and then exposing it to the more extreme
environment for the minimum time necessary to take reading.
Storage Temperature
-22.0 °F to 140.0 °F | -30.0 °C to 60.0 °C.
Size & Weight
5.0 x 1.9 x 1.1 in / 12.7 x 4.5 x 2.8 cm, 4.3 oz / 121 g. (Lithium
battery included)
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