Velleman DVM8090 - Manual (Page 7)

21.01.2010
7. Bac
Working
The Infra
and trans
converts t
used for a
Emissivit
Emissivity
organic or
Measuring
tape or pa
reach the
When me
than the a
Surface t
When goi
vice versa
Distance
The distan
spot size
sensor an
target, th
target mu
This mean
the target
as the spo
8. Mai
• Wipe th
or solv
9. Bat
• To repl
• Open t
the sen
• Take o
AAA ba
compa
• Slide th
ckground inf
principle
Red sensor of th
mitted by a surfa
this information i
aiming purposes.
ty
y describes the e
r oxidized surface
g shiny or polishe
aint to compensa
surface tempera
asuring targets w
actual temperatu
temperature
ng from low tem
a, the IR sensor o
e and spot size
nce-to-spot ratio
(measured area)
nd the target, e.g
e Ø of the measu
ust be larger than
ns that for smalle
t. For best accura
ot size.
intenance
he device regular
ents. DO NOT su
tteries
lace the batteries
he battery cover
nsor).
ut the old batter
atteries following
rtment.
he battery cover
Do not punc
batteries in
attempt to r
Keep batter
DVM809
7
formation
he unit detects en
ace. This energy
into a temperatu
nergy-emitting c
es have an emiss
ed surfaces will b
ate, allow sufficie
ature.
with ε < 0.95, the
ure of the surface
perature to high
of the thermome
of this thermom
) is approximatel
g. when the mete
ured area (spot s
n the spot size to
er targets, the th
acy, make sure t
rly with a moist,
ubmerge the dev
s, make sure the
r at the back by s
ies and replace t
the polarity mar
back in place.
cture or throw b
accordance wit
recharge non-re
ies away from
90
nergy that is emi
is focussed onto
re reading. The l
characteristics of
sivity of ±0.95.
be inaccurate. Us
ent time for the ta
e display temper
e.
temperature me
eter needs a few
meter is 2:1. This
y half the distanc
er is held at 10 cm
size) will be ±5cm
o ensure correct m
hermometer must
he target is at le
lint-free cloth. D
vice in any liquid.
device is switch
sliding it downwa
hem with 3 new
rkings inside the
batteries in fire
th local regulat
echargeable ba
children.
Rev. 0
©Velleman
tted, reflected
a detector that
laser beam is onl
materials. Most
se some masking
ape or paint to
rature is lower
easurements or
minutes to adjus
means that the
ce between the
m (±4”) from the
m (±2”). The
measurement.
t be held closer t
east twice as larg
Do not use alcoho
.
ed off.
ards (away from
and identical 1.5
battery
e. Dispose of
tions. Do not
atteries.
01
nv
ly
st.
e
to
e
ol
5V