Extech 45118 - Manual
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User M
a
nual
M
o
del 45118
Mini Thermo-A
nemometer
In
tr
o
duct
ion
Congr
at
ul
at
ion
s
on
y
ou
r pu
rchase of Ex
te
ch
’s
4
5118 Mi
ni
Th
er
m
o-
Anemome
ter.
T
hi
s
met
er
is
s
hi
pped f
ul
ly
t
es
ted
and
cali
brat
ed
a
nd, w
ith
pro
per
us
e,
w
ill
pr
ovide
y
ea
rs of
r
eli
able service
Op
era
tio
n
1.
Se
lect the desired uni
ts
f
or
air velocity
and
t
emper
at
ur
e
b
y m
omen
tar
ily
pr
ess
ing t
he
UNI
TS/
M
O
D
E key
f
rom
a
po
w
e
red
do
w
n condi
tion.
T
he
LCD
w
ill sho
w
t
emper
atur
e un
its (
o
C or
o
F
)
an
d Ai
r V
elo
ci
ty
un
its.
Pr
ess
th
e
UNIT
S
/M
ODE
k
ey
r
epeat
e
dly
unt
il
the
desir
ed un
its are di
spl
a
yi
ng.
W
hen
fin
ished, pr
ess
t
he
O
N
/O
FF/
HO
LD k
e
y mome
nt
ari
ly
t
o r
es
tart
the
met
er
w
ith
th
e d
e
si
re
d
un
its
.
2.
P
o
w
er th
e
me
te
r
by
pr
ess
ing t
he
ON/O
FF/
HOLD
ke
y mo
m
en
tar
ily
. T
he
Dual
Displa
y
w
ill
il
lum
ina
te
. T
he
t
op (
lar
ger
)
di
sp
la
y in
dicat
es air speed
a
nd
the lo
w
er
di
sp
la
y indi
ca
te
s
te
mper
at
ure.
3.
Posi
ti
on the
meter
so
that
th
e
measured ai
rf
lo
w
en
te
rs t
he met
er v
a
ne
fro
m
th
e
re
ar
o
f t
he
met
er (o
pp
osit
e sid
e fr
om
th
e
fr
o
nt pa
ne
l l
ogo
, pa
rt
numb
er, et
c.
).
4.
A
ctiv
ate
D
ata
H
o
ld
(
to
fr
eeze
th
e m
os
t r
ecen
t d
isplay
),
by
pre
ssing
and
hol
din
g
th
e O
N
/O
F
F
/H
O
LD ke
y
w
hil
e t
aking measuremen
ts
. T
o r
et
ur
n t
o
nor
mal operat
io
n, rel
ease the key
and r
est
art
the
met
er.
5.
Max
o
p
er
ati
o
n
: A
fter
a
me
a
sur
eme
nt
ses
sion
, pr
es
s and
hold t
he UN
IT
S
/
MO
DE ke
y unt
il
the MAX icon app
ea
rs
on
the l
ow
er
lef
t-
hand side
o
f t
he
LCD.
B
ot
h
the Air Veloci
ty
an
d
T
emperat
ur
e i
ndi
ca
tion w
ill
re
pre
sen
t t
he
hi
ghest
re
adin
gs
measure
d
si
nc
e
th
e met
er
w
as
last
pow
er
ed.
6.
A
ver
age mo
de opera
ti
on
: Normal
ly
t
he met
er
avera
ges
re
ading
s ever
y
2
sec
on
ds
. T
o sel
ec
t 5,
1
0 or 13
s
econd
a
ver
agi
ng, f
irst
pr
es
s a
nd hol
d the
UNIT
S
/M
ODE
k
ey
unt
il t
h
e MA
X
icon
a
ppear
s. Nex
t,
pre
ss t
he
ke
y agai
n
mo
m
en
tar
ily
and t
he A
V
G icon w
ill
appe
ar.
T
he 13
sec
o
nd
aver
age
mo
de
is select
ed. No
w
pr
es
s t
he key
agai
n a
nd
the nu
m
ber
5
w
ill
a
ppear. Lea
ve
it t
her
e i
f
an
avera
ge of 5 s
econds is d
esi
red
. Pr
es
s the
ke
y once mor
e f
or
a 10 s
econd a
ver
age mode
. T
o r
etu
rn
t
o normal oper
at
io
n pr
ess
th
e
UNIT
S
/M
ODE
k
ey
r
epeat
e
dly
unt
il al
l lo
w
er
le
ft
-h
and i
cons
di
sa
ppear
.
7.
Wi
nd
chil
l i
ndicator
: P
res
s and
h
old
t
he UNIT
S
/M
ODE k
e
y unt
il t
he MA
X
icon a
ppear
s.
Pres
s t
he
k
e
y r
epeat
ed
ly
unt
il the
W
C
I i
con appear
s.
T
he
te
mp
erat
ur
e displ
ay
will
no
w
f
a
ct
or
in
the w
ind chi
ll.
To
re
tu
rn
to
n
or
m
al
oper
at
io
n, pr
ess
t
he UNIT
S
/M
ODE k
ey
ag
ain an
d
th
e
W
C
I i
con w
ill
di
sapp
ear
.
8.
AU
T
O
P
O
W
E
R
O
F
F
: A
ft
er ap
pr
ox
. 1
5
min
s, if
me
te
r ke
ys
a
re n
ot
touched
,
th
e
m
ete
r a
uto
m
ati
ca
lly
s
huts
d
o
w
n to
p
re
se
rv
e ba
tte
ry
li
fe.
Met
er D
esc
ri
pt
io
n
1. V
ane
impel
le
r
2. P
re
ci
si
on
th
ermi
st
er
3. L
CD
displa
y
4.
P
O
W
E
R a
nd H
O
LD
ke
y
5.
UNI
T
S
and
MODE
k
e
y
6.
B
at
ter
y c
om
part
m
en
t (on
re
ar)
7.
S
w
ivel
handl
e and
st
or
age
case
8.
La
ny
ar
d
ho
lde
r
9.
Im
pell
er s
e
t s
cr
e
w
(
on r
ear
of me
te
r)
Specif
ic
ati
ons
Di
sp
la
y
Dual
LCD w
ith
multif
un
ct
io
n i
ndica
to
rs
Me
as
ur
em
en
ts
K
nots
, km
/h
, MP
H
, ft/
mi
n,
m/s
e
c,
Be
au
for
t for
ce
,
w
in
dc
hi
ll,
and
te
mp
er
at
ur
e (
C
/F
)
W
ind-
speed
Moving
2 s
e
cond a
ve
rag
e w
ith
2 s
e
co
n
d gust de
te
ct
S
ensor
Sap
phir
e be
ari
ng
, non-
co
rr
os
iv
e
v
an
e
for
air velo
ci
ty
and
p
recisio
n
th
er
mi
st
or f
or
te
mper
at
ur
e
A
ver
age
Mode
Choi
ce
o
f 5, 10
, or 13 s
e
cond
av
e
ra
g
e r
eadin
gs
Max
Di
sp
la
y
Push but
to
n hi
ghes
t r
eadi
ng
r
ec
al
l
Dat
a hold
Free
ze
m
os
t recent d
ispla
y
S
ampl
e
time
1 r
eadi
ng
pe
r sec
ond
W
ater
-r
esist
ant
T
o 1 met
er
(3’
)
Min/
Ma
x
w
ind-
sp
ee
d
1.
1
to
62
.5
MP
H
O
per
at
ing t
emp
eratur
e
-15 t
o
50
o
C
(5
to
1
22
o
F)
O
per
at
ing hu
m
idi
ty
< 80%
RH
P
o
w
er
s
u
ppl
y
Lit
hiu
m batt
er
y t
yp
e
CR-2
032 o
r eq
u
ivalent
B
at
ter
y l
ife
400 h
our
s app
rox
.
W
eight
95 g
(
3
o
z)
Di
mension
s
In
st
rumen
t:
1
33
x
70 x
19mm (5.
25 x
2.
75
x
0.
75”
)
Van
e: 24
mm
(1”)
d
iam
et
e
r
2.
2
El
ec
tr
ic
al
Spe
c
if
ic
ati
ons
Meas
u
rement Range
Resol
u
ti
on
A
ccurac
y
MP
H (
M
iles
per
hou
r)
1.
1
to
62
.5
MPH
0.
2 MP
H
± (
3%r
dg
+0
.4
MPH
)
km
/h
r (
ki
lom
et
er
s
per
ho
ur
)
1.
8
to
1
00
.6
k
m
/h
0.7
k
m
/h
± (3
%r
dg
+
1.4
km
/h
)
K
not
s (
na
ut
ical
m
ile
s pe
r ho
ur
)
1.
0
to
5
4.
3 kno
ts
0.
3
k
not
s
± (3
%
rdg +0
.6
knot
s)
m/sec (
m
eters
per
sec
o
nd)
0.
50
t
o 28
.00 m/
s
0
.01
m/
s
± (
3%rd
g +0
.2
m/
s)
ft/m
in (
fee
t
per
minu
te)
100
to
55
00
ft
/min
20f
t/mi
n
± (
3%rd
g +40
ft/m
in
)
B
eauf
ort f
or
ce
1 t
o 17
BF
1 BF
± 1
0 to
12
2
o
F 0
.1
o
F ±
1.
8
o
F
T
empe
rat
ure
-1
8 to
5
0
o
C 0.
1
o
C ±1
o
C
M
a
in
tenance
Batt
er
y Repl
acement
If t
he
me
te
r
w
ill
not
po
w
er u
p as us
ua
l or
the
displa
y cont
ra
st
beco
m
es w
eak
and d
iff
ic
ult
to
r
ead, re
place
t
he lit
hium
bat
ter
y.
T
o do
so, tur
n
th
e
batt
er
y
compart
m
en
t c
over in
a
CLO
C
K
W
ISE
dir
ect
ion t
o r
emove
it
. Th
e ba
tte
ry
w
ill
be visib
le i
n
the
b
att
er
y comp
art
m
ent,
o
bs
er
ve t
he
po
si
tio
n
of
the
b
att
er
y
and
repla
ce
th
e n
e
w
on
e in t
he
sa
me posit
ion.
Aff
ix
t
he batt
er
y c
om
pa
rtmen
t
cov
er
b
y t
ur
nin
g it
in
a CO
UN
T
E
R-
CL
O
C
K
W
ISE dir
ect
ion.
Dispose
of t
he
lit
hi
um
batt
ery
in
acc
or
dance
w
ith
lo
ca
l, s
tat
e,
or
n
at
ion
al
w
ast
e di
sp
o
sal
codes.
You
, as
t
he
end u
ser
, ar
e legal
ly
boun
d (
EU Batt
ery
ordinance
)
to
r
etu
rn
a
ll u
se
d b
atte
rie
s,
di
sposal
in t
h
e hou
s
eh
o
ld
garbage
is
p
rohi
bi
te
d
!
Y
ou
can hand ov
e
r y
our
used ba
tt
eri
es
/
acc
umu
lat
ors a
t col
lect
ion point
s i
n y
o
ur comm
un
ity
or
w
h
e
rever
bat
ter
ies
/
ac
cu
mulat
or
s ar
e
s
ol
d!
Di
sposal
:
Follo
w
th
e v
a
lid
leg
al
st
ipu
lat
ions in
r
espect o
f t
he
di
sp
os
al
of th
e d
evice at t
he end
o
f
its l
ife
cy
cle
Vane Impell
er Rep
lacement
NOT
E
:
T
he
ane
mo
m
et
er
is
ver
y acc
ur
at
e
at lo
w
and mi
d-r
ange air
s
pe
eds
.
Const
ant use a
t very
high spee
ds
ma
y d
amage
t
he i
m
pe
lle
r’s bear
in
g and
re
duc
e
ov
e
r-
al
l acc
u
rac
y.
1.
To
re
pl
ac
e
the
im
pe
lle
r,
re
mo
ve
th
e se
t sc
re
w
nex
t to
th
e im
pe
lle
r
ass
em
bl
y (
on the rear
o
f t
he
met
er
).
Tw
is
t t
h
e i
m
p
eller
as
semb
ly
count
er
-c
lo
ck
w
ise t
o t
he "O" (open)
po
sit
ion and remove
it.
2.
In
st
all the n
ew
im
pe
ller
by
inser
ting
an
d t
w
is
ting t
he new
im
pel
ler
ass
em
bl
y c
lockw
is
e t
hen
tigh
te
n t
h
e s
et
s
cr
ew
.
C
F
M
M
eas
u
rem
en
ts
M
easure
the area of
th
e
du
ct
using t
he
di
agrams
bel
ow
for rect
ang
ular a
nd
ci
rc
ul
ar
du
ct
s
(If
the
duct
measurements
are
m
ade
in
in
ches,
divid
e
the inches by
14
4
to get the
ar
ea
in
squa
re
fe
et
).
Plug
the
area val
ue
(in squa
re feet) in
the
cu
bic e
quations b
elow.
N
ot
e
that
the a
ir
ve
locity
must
be plug
ged into
the cubic equations also.
CFM
(
ft
3
/min) = A
ir
V
e
locit
y (ft/
min) x
A
rea
(ft
2
)
CM
M (
m
3
/min) =
A
ir
V
e
locit
y (m/
sec) x
A
rea
(m
2
) x
60
Cop
yri
ght
©
2011
E
xte
ch
In
str
u
ments Corporati
on (
a FL
IR
c
o
mpany
)
All
rights
res
erved
inc
lud
in
g the righ
t o
f re
pro
duc
tio
n i
n
w
ho
le or in part in any form.
4
5118-
EU-
E
N-
V
4.
3 3/
11
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