Extech 45158 - Manual
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User M
a
nual
Model 45158
Mini Hygro Thermo-Anemometer
In
tr
o
duct
ion
Congr
at
ul
at
ions
on
your
pur
ch
ase
of
Ex
te
ch’s Mod
el 45
158
Ane
m
om
et
e
r.
T
he
dual
displa
y indi
cat
es
A
ir
V
elo
ci
ty
and Humi
dit
y,
De
w
Poi
nt,
Ambient
T
empe
ra
ture,
or
T
emper
at
ur
e
w
ith
w
ind-
ch
ill
f
ac
tor
.
W
ith
ca
ref
u
l use, t
hi
s me
te
r w
ill
pro
vi
de y
ear
s of r
el
iab
le
ser
vi
ce.
Op
era
tio
n
Tu
rn
ing t
h
e me
te
r O
N
and
OFF
Press
the ON/OFF
/H
OLD butt
on to turn t
he
met
er
O
N
Press
and
hol
d
the ON/OF
F/HO
LD buttons
for a
pprox.
3 s
ec
onds
to
tu
rn it
O
FF
Th
e meter’s Auto
Powe
r O
FF
feature turns
the
met
er
OF
F
aft
er
20
m
in
utes of i
nact
iv
ity
Chang
e
the l
o
w
er
di
spl
ay
p
a
ramet
er
Wi
th
the
meter
O
N
, press and hold down t
he
O
N
/O
FF
/H
O
LD but
ton
Whi
le
cont
in
ui
ng
to h
old
th
e O
N
/O
FF
/H
O
LD b
ut
ton, press
th
e UNITS/MO
D
E bu
tton
repeatedl
y
to step
th
rou
gh
T
emperature (oF
/o
C
),
Humidity (RH%)
, D
ew
Poin
t (TD),
&
Te
m
pe
ra
ture with wind-chil
l factor
(WC
I).
Note
that t
he center
di
splay is
Air Velocity.
Chang
e
the
A
ir
Ve
lo
ci
ty
uni
t of m
easu
re
Tu
rn
the
m
et
er
OF
F. Pr
ess and
hol
d d
own
bot
h buttons u
nt
il the
displa
y
turns on
and
begi
ns
bl
ink
ing then r
el
ease both
bu
ttons
Press
the UN
IT
S/
MOD
E but
ton repeatedl
y to
st
ep t
hroug
h
the units
(s
ee specs
for
list
)
Af
ter 5
second
s the
met
er
swi
tc
hes back to nor
m
al
operat
ion m
od
e
au
to
matically
Sel
ec
t t
empe
ra
tur
e
u
n
it
s (
o
C or
oF)
Tu
rn
the m
et
er OF
F f
irst.
P
ress
and hol
d
do
wn
bo
th
butt
ons
until the di
splay t
urns on
and begi
ns
bl
in
king the
n release t
he
bu
ttons
Press
both butt
ons
mo
m
ent
ari
ly
to c
hange t
em
perature units
Af
ter 5
second
s the
met
er
swi
tc
hes back to nor
m
al
operat
ion m
od
e
au
to
matically
T
aki
ng Measure
m
e
n
ts
Position t
he
meter
so
th
at
th
e
ai
rflo
w
enters the
met
er vane f
rom
th
e
rea
r of the m
eter
(opposi
te
side
of front p
ane
l l
ogo). A
tripo
d mount
is l
ocat
ed
on
the b
ott
om of
the
met
er.
Max Hol
d
Max
Ho
ld r
epresent
s t
he
hi
ghest
measurement
taken since t
he me
te
r was t
urne
d
on
Press
the UN
IT
S/
MOD
E but
ton to
di
sp
lay
the
Max
readi
ng (
M
AX
ic
on
app
ears)
Press
the UN
IT
S/
MOD
E but
ton repeatedly to
st
ep t
hroug
h
to t
he norm
al operating
mode
A
ve
rag
e m
o
d
e
5 or
10
read
ing average
s c
an
be
di
sp
layed in t
he Average M
ode.
Press UNITS/
M
O
D
E 3
tim
es
for 5
readin
g averag
ing
or 4
times for 1
0
read
ings
To
exit t
hi
s mode,
pre
ss
th
e
UNITS/
M
O
D
E
bu
tton unt
il t
he icons on t
he
le
ft
di
sappear
Dat
a Hol
d
Data Hold f
ree
ze
s the most
recent
displayed readi
ng
Press and
hol
d the
ON/OF
F/HO
LD
button to
ac
tivate
Data Ho
ld
As
lo
ng as
the ON/OFF
/H
OLD butt
on is held the
rea
ding will
remain
on the
LCD
Cop
yr
ight
©
2013
FL
IR
S
yste
m
s,
In
c.
A
ll ri
gh
ts
res
e
rved inc
ludi
ng
the
ri
ght o
f r
epr
odu
ct
io
n i
n w
h
ol
e or in part
in
an
y f
o
rm
IS
O
-9001 Cert
ifi
ed
w
w
w
.e
xt
ech.
com
4515
8-
EU-
E
N V
3.
4
8/1
3
Met
er
D
esc
rip
ti
o
n
1
Vane impel
ler
2
Impeller
set screw
(on
rear
of meter)
3
R
el
ati
ve
H
um
id
ity
s
en
so
r
4
Te
mperat
ur
e sensor
5
LCD
displ
ay
6
O
N
/O
FF
, HOLD key
7
UNITS, MO
DE
key
8
Batt
ery co
m
part
m
ent (on
rear)
9
Tripod m
ounting ho
le
10
Lan
ya
rd
(neckstr
ap)
Spe
cif
ic
at
io
n
s
Measu
reme
nt
Ran
ge
Re
solution
Ac
curacy
(% of read
ing)
M
PH (M
iles
pe
r ho
ur)
1.1 t
o 62.5 MPH
0.
2 MP
H
± (3%
+
0.4
m
ph)
km
/hr (
kil
om
et
ers
per
hour)
1.8 t
o 100.6 km/h
0.
7 km
/h
± (3%
+
1.4
km
/hr
)
Kn
ot
s (nautical m
iles
per ho
ur)
1.0 t
o 54.3 k
not
s
0.
3 knots
± (3%
+
0.6
knot
s)
m
/sec (
m
eters per
se
co
nd
)
0.5 t
o 28.0 m/s
0.
1 m/
s
± (3%
+
0.2
m
/s
)
ft/min (feet
per
m
inut
e)
100
to 5
500
ft/
m
in
20
ft/
m
in
±
(3% + 40
ft
/m
in)
Be
auf
or
t f
orce
1 t
o
17 BF
1
BF
± 1
Temperature -18
to
50
o
C
(0
to
1
22
o
F) 0
.1
o
F/
C
±
1
.8
o
F (±
1
o
C)
Relative Humidity
10 to
95
%
1%
± 5%
R
H
Dew Poi
nt
0
to
50
o
C
(32
to 12
2
o
F) 0
.1
o
F/
C
±
3
.6
o
F (2
o
C)
Ge
n
era
l S
p
ec
if
ic
at
io
n
s
Displ
ay
Dual LCD with low bat
tery and m
ul
tifunction indi
ca
to
rs
Sensors
Sapphire bearing,
non-corrosive vane f
or air vel
ocity;
Pr
ec
is
ion t
he
rmistor
for
te
mperature m
easuremen
ts
Average M
ode
Choice of
5 or 10 r
eading averagin
g
(2 second f
actory
default)
Max a
nd Da
ta
Hold
Displ
ays
Max
recall
s the
hi
ghest read
ing;
Data Hold fr
ee
zes
the
display
Sample t
im
e
1 r
eading per second f
or air v
elocity
and temper
at
ur
e
(1 rea
ding
per
15 seconds for h
um
idity
with
2 s
econd
updates)
Wa
te
r-resistant To
1m(3’)
Op
erat
ing
con
diti
ons
-15 t
o 50
o
C (5
to 122
o
F)
/ <
80%
RH
Power supply
Lithium bat
tery (
C
R-
20
32
or
equ
ivalent)
/ 400 hour
ba
ttery
life
Dimensi
ons
/ W
eight
In
st
rument: 133 x
70 x
19
m
m
( 5.
25
x 2
.75
x 0.75
”)
Vane: 24mm (1”
) diameter /95
g
(3
oz)
Ma
inte
na
n
c
e
Bat
te
ry
R
ep
lacement
T
he
4
5158
ha
s a
lo
w
ba
tt
er
y i
ndi
ca
to
r (bat
te
ry
sy
mbo
l).
Impo
rt
ant
: T
urn t
he
met
er
o
ff be
fo
re op
eni
ng
the batt
er
y comp
artmen
t. U
si
n
g
a co
in
, t
urn
th
e
ba
tter
y compart
m
ent
cov
er CLO
C
K
W
ISE
to
remove
it
. O
nc
e
opened,
ob
se
rv
e t
he
po
si
tio
n
of
the
b
att
er
y,
p
lacing
t
he
new
one i
n t
he
sa
me
po
si
tion.
Secur
e
th
e bat
te
ry
compa
rtment
cov
er an
d dispo
se of
th
e lit
hi
um
ba
tter
y i
n acc
or
danc
e
w
ith
lo
ca
l, st
at
e,
or
nat
iona
l di
sp
o
sal c
o
des.
A
ll E
U
u
sers are
le
gally
bo
u
nd by
the
B
a
tter
y
O
rdina
nce
to
retu
rn
all use
d b
a
tte
ri
es
to
co
mmun
ity
collection
po
ints
or
whe
re
ve
r ba
tt
er
ies
/
a
cc
um
ul
ato
rs
ar
e s
ol
d
.
D
ispo
sa
l in h
ous
ehold
trash o
r r
ef
u
se
is proh
ib
ited.
D
is
pos
al:
F
o
llow
th
e
va
lid
le
gal st
ip
ulatio
ns in re
sp
ect
of
the d
isposa
l of t
he
de
vi
ce
at th
e end
of
its
li
fe
cy
cl
e
O
the
r
B
a
tt
er
y Safet
y R
e
mind
er
s
N
e
ve
r
dispo
se o
f ba
tte
ri
es
in
a
fir
e.
B
atteries
may
e
xplod
e or
lea
k.
N
e
ve
r m
ix
bat
ter
y t
ype
s.
A
lw
a
ys
i
nstall new
ba
tteries o
f the
sam
e
t
ype.
Im
p
e
ller R
e
p
lac
em
en
t
Remo
ve
the
set
screw
n
e
xt
to
th
e
impeller a
sse
mb
ly
(
on th
e
rear o
f th
e mete
r)
.
Tw
is
t the
imp
e
lle
r
assembly
cou
n
te
r-
cl
ockw
ise to
the
OPE
N
po
siti
on
a
n
d r
emov
e
it.
In
stall imp
e
lle
r b
y inse
rt
in
g &
t
w
istin
g
th
e n
e
w
impeller
asse
mb
ly
clo
ckwise
T
ight
en the set
sc
rew
.
CFM Mea
su
re
m
ent
s
Measur
e t
he
area o
f t
he duct us
ing
the
dia
grams
b
elow
f
or rect
angu
lar and
ci
rc
ul
ar
duct
s
(I
f t
he duct measur
em
ent
s ar
e
ma
de
in inche
s,
di
vi
de
t
he
in
ches b
y 144 t
o ge
t t
he are
a in
s
quare f
ee
t).
Pl
ug
the ar
ea
value (i
n
sq
uar
e feet
) i
n the
cubi
c eq
uat
io
ns
b
el
o
w
. Not
e
th
at
th
e air
ve
lo
ci
ty
must
be pl
ugged in
to
t
he
cubi
c eq
ua
tio
ns
a
lso.
CF
M
(
ft
3
/min
) = A
ir V
el
oci
ty
(
ft/mi
n)
x
A
rea (ft
2
)
CM
M (
m
3
/min
) =
A
ir V
el
oci
ty
(
m
/sec) x
A
re
a
(m
2
) x
60
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