Non-contact infrared thermometer
981C
Instruction manual
1、Introduction
Compact, rugged and easy to use. Just aim and push the
button, read current surface temperatures in less than a
second. Safely measure surface temperatures of hot,
hazardous or hard-to-reach objects without contact.
How it works
Infrared thermometer measures the surface temperature of
an object. The unit’s optics sense emitted, reflected, and
transmitted energy which is collect and focused onto a
detector. The unit’s electronics transmitted energy which
is display on the unit. For increased ease and accuracy the
laser pointer makes aiming even more precise.
Cautions
Infrared thermometer should be protected for the
following:
--EMF(electro-magnetic fields) from arc welders,
induction heaters.
--Thermal shock(cause by large or abrupt ambient
temperature changes allow 1 hours for unit to stabilize
before use).
--Do not leave the unit on or near objects of high
temperature.
Warning
Do not point laser at eye or indirectly off reflective
surfaces.
1. When take measurement, point thermometer toward
the object to be measured and hold the yellow trigger.
The object under test should be large than the spot
size calculated by the field of view diagram.
2. Distance ＆ spot size: As the distance from the
object increase, the spot size of measuring area
becomes large.
3. Field of view: Make sure the target is larger than the
unit’s spot size. The smaller the target the close
measure distance. When accuracy is critical, make
sure the target is at least twice as large as the spot
size.
4. Emissivity: Most organic materials and painted or
oxidized surfaces have an emissivity of 0.95.
Inaccurate readings will result from measuring shiny
or polished metal surfaces. To compensate, cover the
surface to be measured with masking tape or flat
black paint. Measure the tape or painted surface when
the tape or painted reach the same temperature as the
material underneath.
2、Quick start instruction
1. Press battery door clip, install battery correctly. Pull
the trigger, LCD display reading ＆ battery icon.
Release the trigger and the reading will hold for 7
seconds
LCD display:
A LCD display B MAX
C Low temperature warning setting D Average
E High temperature warning setting F Emissivity
G MIN H Storage date NO.
I Low battery indication J Laser Light
K High temperature warning L Measure data
M Low temperature warning
N Temperature Unit O Date HOLD
2. Locating a hot spot aim the thermometer outside the
(Figure 3)
(Figure 1)
(Figure 2)
area of interest, then scan across with up and down
motions until you locate the hot spot.(please turn on
the laser to for accurate measuring)
3. Diagram description
(1) Trigger：Press once, Power on. Press one more time ,
Reading shows on the screen and Turn to Date HOLD
model while release the trigger, auto data hold will
keep for 10 seconds. 10 sencond without any
operation, will auto power off.
(2) Laser Light&Up bottom：Press once, turn on laser
light, press one more time, turn off laser light. While
setting on “warning temperature setting” ,” emissivity
setting” and “Date storage Reading” this bottom
work as UP bottom.
(3) Back Light/Down bottom：Press once, turn on back
light , press one more time, turn off backlight. While
setting on “warning temperature setting” ,” emissivity
setting” and “Date storage Reading” this bottom
work as DOWN bottom.
(4) MODE Bottom：Press this bottom to chose mode
E-MAX-AVG-MIN-LAL-HAL circularly。
A、MAX：Measure current max reading ；
B、MIN：Measure current min reading；
C、AVG：Average of all the reading data ；
D、HAL：High Temperature Warning , Chose mode
HAL to set the warning temperature(HIGH), press
“UP/DN” to select temperature. while measure date is
higher than setting temperature, “H” will display on
the screen
E、LAL：Low Temperature Warning , Chose mode
HAL to set the warning temperature(LOW), press
“UP/DN” to select temperature. while measure date is
lower than setting temperature, “L” will display on
the screen
(5) MEM Bottom：For reading the storage data。Press
once to read the date。Press“UP/DN”to select date。
It can store only 12 data, while over 12 date, the new
one will cover the old one。Once take out battery, all
the date will be gone.
(6) ℃ /
0
F： ℃ /0F Change， If you want to change the
temperature unit，Please press this bottom。
(7) LED Screen。
(8) Battery door: When replace battery door, please using
the finger indents to pull open the battery door.
3、Maintenance
1) Lens cleaning: Blow off lose particles using clean
compressed air. Gently brush remaining debris away
with a moist cotton cloth.
2) Case cleaning: Clean the case with a damp
sponge/cloth and mild soap.
3) Please take out the battery when not using for a long
time.
Note:
1) Do not use solvent to clean lens.
2) Do not submerge the unit in water.
4、specifications
Temperature
range
-30℃ to 550℃(-22to10220F)
Accuracy
±3℃ or ±3%of rdg,-30℃ to 0℃(-22 to 320F)
±2℃ or±2% of rdg,,0℃ to 100℃(32 to 2120F)
±3℃ or ±3% of rdg,,≥100℃(2120F)
Repeatability
1%of reading or 1℃
Response time
500msec, 95%response
Spectral response
8-14um
Emissivity
0.1～1.0 adjustable
Ambient operating range
0℃ to ~60℃(32 to 1400F)
Relative humidity
10-95% RH noncondensing
Storage temperature
-20~60℃(-4~1400F) without battery
Ambient temp range of
guarantee for accuracy
23℃~28℃
Weight/dimensions
155g;165×72×41mm
Power
9V battery ,6F22 or NEDA 1604
Battery life
Laser models:12hrs
distance spot ratio
8:1
Attached list ：Applicable Emissivity for Different
Material ( For reference only)
Material
Emissivity
Material
Emissivity
Asphaltum
0.90 to 0.98
Textile（Black）
0.98
Beton
0.94
Human Skin
0.98
Cement
0.96
Soap bubble
0.75 to 0.80
Sand
0.90
Charcoal
（powder）
0.96
Soil
0.92 to 0.96
Lacquer
0.80-0.95
Water
0.92 to 0.96
Lacquer
（reluster）
0.97
Ice
0.96 to 0.98
Rubber （Black）
0.94
Snow
0.83
Plastic
0.85-0.95
Glass
0.90 to 0.95
Timber
0.90
Ceramic
0.90 to 0.94
Paper
0.70-0.94
Marble
0.94
Chromic oxide
0.81
Gypsum
0.80 to 0.90
Copper Oxide
0.78
Compo
0.89 to 0.91
Iron Oxide
0.78 to 0.82
Brick
0.93 to 0.96
Stainless steel and
Aluminum
0.2-0.3
(Figure 5)
(Figure 4)
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