C/ F
MODEL: VICTOR303B
Infrared thermometer
Instruction manual
This infrared thermometer is used for measuring
the temperature of the object's surface, which is
applicable for various hot, hazardous or hard-to-
reach objects without contact safely and quickly.
This unit consist of Optics, Temperature Sensor
Signal amplifier, Processing circuit and LCD Displ-
ay. The Optics collected the infrared energy emitt-
ed by object and focus onto the Sensor. Then the
sensor translates the energy into an electricity sig-
nal. This signal will be turned out to be digital sh-
own on the LCD after the signal amplifier and pro-
cessing circuit.
Figure 5
1. Lens Cleaning:
Blow off loose particles using clean compressed
air. Gently brush remaining debris away with a
moist cotton swab. The swab may be moistened
with water.
2. Case cleaning: Clean the case with a damp spo-
nge/cloth and mild soap.
Note:
1) Do not use solvent to clean plastic lens.
2) Do not submerge the unit in water.
2. Buttons: Figure 5
(1) Trigger: When pull the trigger, LCD display rea-
ding with SCAN icon. Release the trigger, displ-
ay reading with HOLD icon for 7 sec(approx).
Built-in 20 sec auto power off function.
(2) Laser on/off button
(3) Celsius / Fahrenheit switch button
(4) Back light on/off button
When backlight is on,
any operations will activate the backlight for 7
seconds.
：
(2)
(4)
(3)
A. Introduction
G. Maintenence
H. Specification
B. Warning & Cautions
To avoid the potential situation may cause harm
or damage to people, please pay attention to the
following items:
1) Before you use this unit, check on the plastic
housing carefully. If there is any damage, do not
use it.
2) Do not point laser directly at eye or indirectly
off reflective surfaces.
3) Do not use this unit in the environment of
explosive gas, steam or dusty.
To avoid the damage of the unit or the target,
please protect from the following situations:
1). EMF (electro-magnetic fields) from arc welders,
induction heaters.
1. Warning:
2. Caution
：
2). Thermal shock (caused by large or abrupt ambi-
ent temperature changes-allow 30 minutes for
unit to stabilize before use.
3). Do not leave the unit on or near objects of high
temperature
2
1
3
5
6
1. When take measurement, pay attention to the Di-
stance to Spot Size. As the Distance (D) from the
target surface increases, the spot size (S) of the
area measured by the unit becomes larger.
The Distance to Spot size of the unit is 12:1
***This unit is equipped with a laser, which is used
for aiming.
2. Field of view:
Make sure the target is larger than the unit's spot
size. The smaller the target the closer measure dis-
tance. When accuracy is critical, make sure the tar-
get is at least twice as large as the spot size.
C. Distance to Spot size
38mm@
300mm
75mm@
900mm
132mm@
1500mm
1.5"@
12"
3.0"@
36"
5.3"@
60"
D:S=12:1
Figure 1
Most organic materials and painted or oxidiz-
ed surfaces have an emissivity of 0.95 (pre-set in
the unit). Inaccurate readings will result from mea-
suring shiny or polished metal surfaces. To comp-
ensate, cover the target surface with masking tape
or flat black paint. Measure the tape or painted su-
rface when the tape or painted reach the same te-
mperature as the material underneath.
Trigger
Finger indents
Figure 3
E. Operation
4
D. Emissivity
1. Operating the unit
：
；
1). Open the battery door and
insert a 9V battery properly.
2). Pull the trigger to turn on
the unit;
3). Aim at the target surface and
pull the trigger, then tempera-
ture will be shown on the LCD.
This unit is equipped with a
laser, which is only used for
aiming.
2. Locating a Hot Spot
：
To find a hot spot, aim the thermometer outside
of interest, then scan across with an up and down
motion until you locate the hot spot. (Figure 3)
Figure 2
F. LCD display & Buttons
a
b
c
d
e
f
g
Figure 4
(1)
1. LCD display: Figure 4
a. Data hold icon
b. Scanning icon
c. Laser on icon
d. Backnight on icon
e. Battery power icon
f. Temperature unit
g. Temperature reading
Accuracy
0
~350
(32
~662
)
1.5
(
2.7
)
or
1.5%
-32
~0
(-26
32
)
3
(
5
)
Whichever is greater
℃
℃
℉
℉ ：±
℃ ±
℉
±
℃
℃
℉
℉ ： ± ℃ ± ℉
Repeatability
1% of reading or 1
℃
Response time
500 mSec, 95% response
8-14 um
Emissivity
0.95 Preset
0 ~40
(32 ~ 104
)
℃
℉
-20 ~ 60
(-4~140
)
℃
℉
Power
9V battery
Non-laser mode: 22 hrs;
Laser Models:12 hrs
12:1
Spectral response
Operating Humidity
Storage Temperature
Typical battery life
(Alkaline)
Distance to Spot size
Weight
Dimension
-32 ~ 350
(-26 ~ 662
)
℃
℉
Temperature range
153x101x43mm
147.5g
Operating Temperature
10~95%RH non-condensing
up to 30
(86
)
，
℃
℉
Resolution
0.1
or 0.1
℃
℉
MADE IN CHINA
