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Pocket Weather
Thank you for purchasing the Kestrel 3500 Pocket Weather Meter.
This instrument will measure the following environmental conditions:
• wind speed
• maximum wind gust
• average wind speed
• temperature (air, water snow)
• wind chill
• relative humidity
Plus additional features:
• clock
• data hold function
• automatic power-down function
INSTRUCTION MANUAL
Mode
Hint
Humidity
r.h.
Heat Stress Index
H.I.
Delta T
dELt
Dewpoint
d.P.
Wet Bulb Temp
bulb
Barometric Pressure*
bAro
Altitude
Alt
* Only one of the pressure icons will be displayed, indicating the 3-hour pressure trend.
pressure rising quickly (rise more than +0.18 inHg)
pressure rising (rise within +0.06 inHg and +0.18 inHg)
pressure stable (remain within -0.06 and +0.06 inHg)
pressure falling (drop within -0.06 inHg and -0.18 inHg)
pressure falling quickly (drop more than -0.18 inHg)
or
5. Hold mode. While holding
, press
The word "HOLD" will blink to indicate the Hold Mode. Press
h
p
m
h
p
measurements in Hold Mode. While holding
G
V
A
G
V
A
mode can be useful for taking measurements when unable to view the display.
d
i n
W
e
a g
e r
A v
e
n c
S i
d
e e
S p
n
O
e r
w
P o
n
3500 Delta T
Meter
®
with Backlight
• heat stress index
• dewpoint
• wet bulb temperature
• barometric pressure
• altitude
• delta T
• 3-hour pressure trend
• backlight
Icon
Units of Measure
%
C, F
C, F
C, F
C, F
hPa, inHg
m, ft
h
p
m
G
V
G
V
A
d
i n
W
e
n c
S i
n
O
or
h
p
m
G
V
o r
or
to hold the time and all of the measured values.
G
V
A
or
or
to view the other
or
mph
mph
mph
mph
d
i n
W
mph
MAX
MAX
AVG
e
n c
S i
n
O
m
h
p
m
MAX
, press
to exit the Hold Mode. This
X
A
M
MAX
AVG
Current
Maximum 3-
Average Wind
X
A
M
Speed Since
Wind Speed
Second Gust
Average Wind
Current
Maximum 3-
mph
Since Power On
3 -
m
u
i m
a x
M
Wind Speed
n t
r e
u r
C
Second Gust
Speed Since
t
u s
G
d
n
c o
S e
d
e e
S p
d
i n
W
Since Power On
Power On
O
e r
w
P o
e
n c
S i
2
OPERATION
1. Slide off cover.
2. Turn on. Press the center button (
3. Select operating mode. Press the right arrow (
listed below. Press the left arrow (
order. The instantaneous measurements will be displayed. Each measurement screen
is preceded by a brief hint to clarify which measurement is being displayed. (See
Understanding the Measurements section for more information.)
4. Select the unit of measure. While holding
measure listed below.
Mode
Clock
Wind Speed
Max Gust
Avg Speed
Temperature
Wind Chill
Revised 06/07
3
4
6. Turn on the backlight. Press
are pressed while the backlight is illuminated, the backlight will remain illuminated for
another 10 seconds. Press
the backlight.
7. Adjust the clock. Simultaneously press
blinking, press
h
p
m
G
V
A
Simultaneously press
h
p
m
h
p
m
h
p
m
G
V
A
G
V
A
X
A
M
d
i n
W
e
a g
h
p
m
h
p
m
G
V
A
X
A
M
e
n c
S i
d
G
V
A
8. Adjust the reference altitude. Obtain your altitude from a topographic map or landmark
X
A
M
n
O
e r
d
i n
W
e
a g
e r
A v
3 -
m
u
i m
a x
M
n t
r e
u r
C
G
V
A
X
A
M
e
n c
S i
d
e e
S p
t
u s
G
d
n
c o
S e
to use as your reference altitude. From the barometric pressure screen, simultaneously
d
e e
S p
d
i n
W
n
O
e r
w
P o
n
O
e r
w
P o
e
n c
S i
d
i n
W
e
a g
e r
A v
3 -
m
u
i m
a x
M
e
n c
S i
d
e e
S p
t
u s
G
d
n
c o
S e
press
n
O
e r
w
P o
n
O
e r
w
P o
e
n c
S i
or
o r
reference altitude, or hold
h
p
m
h
p
m
h
p
m
G
V
A
X
A
M
and
G
V
A
X
A
M
h
p
m
h
p
m
G
V
A
X
A
M
d
i n
W
e
a g
e r
A v
3 -
m
u
i m
a x
M
n t
r e
u r
C
h
p
m
h
p
m
G
V
A
X
A
M
e
n c
S i
d
e e
S p
t
u s
G
d
n
c o
S e
d
e e
S p
d
i n
W
A
X
A
M
9. Adjust the reference pressure. Obtain your barometric pressure reading from a local
n
O
e r
w
P o
n
O
e r
w
P o
e
n c
S i
d
i n
W
e
a g
e r
A v
3 -
m
u
i m
a x
X
A
M
e
n c
S i
d
e e
S p
t
u s
G
d
n
c o
S e
weather source to use as your reference pressure. From the altitude screen, simultaneously
n
O
e r
w
P o
n
O
e r
w
P o
e
n c
e
a g
e r
A v
3 -
m
u
i m
a x
M
n t
r e
u r
C
d
e e
S p
t
u s
G
d
n
c o
S e
d
e e
S p
d
i n
W
press
e r
w
P o
n
O
e r
w
P o
e
n c
S i
or
o r
reference pressure, or hold
h
p
m
h
p
m
h
p
m
G
V
A
X
A
M
and
h
p
m
h
p
m
G
V
A
X
A
M
G
V
A
X
A
M
d
i n
W
e
a g
e r
A v
3 -
m
u
i m
a x
M
n t
r e
u r
C
h
p
m
h
p
m
G
V
A
X
A
M
A
e
n c
S i
d
e e
S p
X
A
M
t
u s
G
d
n
c o
S e
d
e e
S p
d
i n
W
10. Turn off. Hold
n
O
e r
w
P o
n
O
e r
w
P o
e
n c
S i
d
i n
W
e
a g
e r
A v
3 -
m
u
i m
a x
X
A
M
e
n c
S i
d
e e
S p
t
u s
G
d
n
c o
turn off if no buttons have been pressed for 45 minutes.
n
O
e r
w
P o
mph
n
O
e r
w
P o
e
n c
e
a g
e r
A v
3 -
m
u
i m
a x
M
n t
r e
u r
C
AVG
d
e e
S p
t
u s
G
d
n
c o
S e
d
e e
S p
d
i n
W
e r
w
P o
n
O
e r
w
P o
e
n c
S i
AVG
mph
mph
mph
MAX
AVG
MAX
AVG
mph
mph
mph
mph
mph
MAX
AVG
Power On
MAX
AVG
Current
Maximum 3-
Average Wind
Wind Speed
MAX
Second Gust
AVG
Speed Since
MAX
Since Power On
AVG
Power On
or
) to turn on the unit.
or
or
) to scroll through the measurements in reverse
or
, press
Hint
Icon
---
---
SPd
SPd
MAX
SPd
AVG
dEG
chill
or
to activate the backlight for 10 seconds. If
or
h
p
m
G
V
A
while the backlight is illuminated to manually turn off
G
V
A
d
i n
W
e
a g
e r
A v
e
n c
S i
d
e e
S p
Current
or
o r
n
O
e r
w
P o
Wind Speed
or
o r
and
or
o r
or
to adjust the clock. Hold
Current
h
p
m
h
p
m
X
A
M
Wind Speed
and
to exit the clock adjustment.
h
p
m
h
p
m
h
p
m
mph
mph
X
A
M
G
V
A
X
A
M
MAX
e r
A v
3 -
m
u
i m
a x
M
n t
r e
u r
C
h
p
m
mph
G
V
A
X
A
M
MAX
e e
S p
t
u s
G
d
n
c o
S e
d
e e
S p
d
i n
W
w
P o
n
O
e r
w
P o
e
n c
S i
d
i n
W
e
a g
e r
A v
3 -
m
u
i m
a x
M
Current
n t
r e
u r
C
Maximum 3-
or
o r
e
n c
S i
d
e e
S p
t
u s
G
d
n
c o
S e
Wind Speed
d
e e
S p
d
i n
W
Second Gust
n
O
e r
w
P o
n
O
e r
w
P o
e
n c
S i
Since Power On
n t
r e
u r
C
Current
o r
or
d
e e
S p
d
i n
W
Wind Speed
and
buttons to adjust the reference altitude. Press
Since Power On
or
to adjust the value quickly. Simultaneously press
mph
h
p
m
mph
h
p
m
G
V
A
MAX
X
A
M
AVG
to exit the reference altitude adjustment.
h
p
m
G
V
A
MAX
X
A
M
AVG
Current
d
i n
W
Maximum 3-
e
a g
e r
A v
3 -
m
Average Wind
u
i m
a x
M
mph
mph
mph
Wind Speed
e
n c
Second Gust
S i
d
e e
S p
t
u s
G
Speed Since
d
n
c o
S e
MAX
AVG
n
O
e r
w
P o
Power On
Since Power On
n
O
e r
w
P o
e
n c
M
n t
r e
u r
C
Current
MAX
AVG
or
o r
d
e e
S p
d
i n
W
Wind Speed
S i
Current
Maximum 3-
Average Wind
o r
or
Speed Since
and
Wind Speed
buttons to adjust the reference pressure. Press
Second Gust
Since Power On
Power On
or
to adjust the value quickly. Simultaneously press
mph
h
p
m
mph
h
p
m
G
V
A
MAX
X
A
M
AVG
to exit the reference pressure adjustment.
h
p
m
or
G
V
A
MAX
X
A
M
AVG
Current
d
i n
W
Maximum 3-
e
a g
e r
A v
3 -
m
Average Wind
u
i m
a x
M
mph
mph
mph
Wind Speed
MAX
e
n c
S i
Second Gust
d
e e
S p
AVG
t
u s
G
Speed Since
d
n
c o
S e
for 2 seconds to manually turn off the unit. The unit will automatically
n
Since Power On
O
e r
w
P o
n
O
e r
w
P o
Power On
e
n c
M
n t
r e
u r
C
Current
AVG
MAX
S e
d
e e
S p
d
i n
W
Wind Speed
S i
mph
Current
Maximum 3-
Average Wind
MAX
Wind Speed
Second Gust
Speed Since
Since Power On
Power On
MAX
Current
Maximum 3-
Wind Speed
Second Gust
Since Power On
mph
mph
mph
) to scroll through the measurements
MAX
AVG
MAX
AVG
mph
mph
mph
MAX
AVG
Current
Maximum 3-
Average Wind
mph
mph
MAX
mph
AVG
MAX
AVG
Wind Speed
Second Gust
Speed Since
Power On
Average Wind
Current
Since Power On
Maximum 3-
AVG
MAX
Wind Speed
Second Gust
Speed Since
Power On
Since Power On
Current
Maximum 3-
Average Wind
Wind Speed
Second Gust
Speed Since
or
Since Power On
Power On
to scroll through the units of
mph
mph
mph
mph
MAX
MAX
AVG
MAX
MAX
Units of Measure
Current
Maximum 3-
Average Wind
Wind Speed
Second Gust
Speed Since
Average Wind
Current
Maximum 3-
Since Power On
Power On
12-hr, 24-hr
Wind Speed
Second Gust
Speed Since
Since Power On
Power On
m/s, ft/min, km/h, mph, kt, B
m/s, ft/min, km/h, mph, kt, B
m/s, ft/min, km/h, mph, kt, B
C, F
C, F
or
o r
or
h
p
m
h
p
m
mph
mph
mph
X
A
M
MAX
AVG
X
A
M
MAX
AVG
3 -
m
u
i m
a x
M
n t
r e
u r
C
t
u s
G
d
n
c o
S e
d
e e
S p
d
i n
W
mph
Maximum 3-
mph
Average Wind
mph
MAX
AVG
n
O
e r
w
P o
e
n c
S i
Speed Since
Second Gust
Since Power On
Power On
or
o r
to adjust the clock. While the clock is
AVG
MAX
Maximum 3-
or
to adjust the times quickly.
Average Wind
mph
mph
mph
MAX
AVG
Second Gust
Speed Since
Since Power On
Power On
mph
mph
AVG
mph
MAX
AVG
MAX
Current
Maximum 3-
Average Wind
mph
mph
AVG
MAX
Wind Speed
Second Gust
Speed Since
MAX
AVG
Since Power On
Power On
Average Wind
Current
Maximum 3-
MAX
AVG
o r
or
Speed Since
Wind Speed
Second Gust
Power On
Since Power On
Maximum 3-
Average Wind
Second Gust
Speed Since
or
to adjust the
Power On
mph
h
p
m
mph
mph
mph
MAX
AVG
n t
r e
u r
C
Current
AVG
MAX
d
e e
S p
d
i n
W
Wind Speed
S i
Maximum 3-
Average Wind
Second Gust
Speed Since
o r
or
Since Power On
Power On
or
to adjust the
mph
h
p
m
mph
mph
mph
MAX
AVG
n t
r e
u r
C
Current
MAX
AVG
d
e e
S p
d
i n
W
Wind Speed
S i
Average Wind
Maximum 3-
Second Gust
Speed Since
Power On
Since Power On
mph
mph
AVG
AVG
Average Wind
Speed Since
Power On
mph
mph
AVG
AVG
AVG
m
Current
Wind Speed
mph
AVG
AVG
Average Wind
Speed Since
Power On
mph
MA
M
Maximu
Second
Since Pow
mph
MA
M
Maximum
Second G
Since Pow
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Summary of Contents for Kestrel 3500 Delta T
- Page 1 The instantaneous measurements will be displayed. Each measurement screen Current Maximum 3- Average Wind Thank you for purchasing the Kestrel 3500 Pocket Weather Meter. Wind Speed Second Gust Speed Since is preceded by a brief hint to clarify which measurement is being displayed. (See...
- Page 2 For example, it is not recommended to apply pesticides readings above 45ºF or below 3 mph. when Delta T is above 10. A range of 2 to 8 (degrees C) is ideal. The Kestrel 3500 Delta T uses a pressure-corrected wet bulb temperature, ensuring accuracy in all conditions.
- Page 3 If we require the product to be returned, we will issue a Return Authorization to NK does not believe in “disposable electronics.” We know that Kestrel Meters don’t typically expedite the handling of your warranty claim.
- Page 4 Each Kestrel comes with a Certificate Assembled in the USA. The Kestrel 3500 Delta T is protected by US Patent of Conformity, with the stated specifications for that product on the back. If you feel an 5,783,753, 5,939,645 and 6,257,079.
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