Delton 981A User manual
Non-contact infrared thermometer
981A
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 10
seconds
LCD display:
A Laser pointer turn on prompt
B Measure prompt
C Backlight prompt
D Data Hold
ETemperature unit symbols
F Measure result
GLow-voltage
2. Locating a hot spot aim the thermometer outside the
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 for turn on, and then display test
result and hold data 10 seconds automatically
("HOLD") after unclamping switch. Trun off
automatically after 10 seconds without operate.
(2) Laser pointer button ：press it for turn on laser
pointer, press again for turn off.
(3) ℃/0Fbutton：press it for ℃, press again for 0F.
(4) Backlight button ：press it for turn on backlight
pointer, press again for turn off.
(5) LCD
(6) 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 350℃(-22to 6620F)
-30℃to 450℃(-22 to 8420F)
Accuracy
±3% of rdg or ±3℃,-30℃to 0℃(-22 to 320F)
±2% of rdg or ±2℃, 0℃to 100℃(32 to 2120F)
±3% of rdg or ±3℃, ≥100℃(2120F)
Repeatability
1%of reading or 1℃
Response time
500msec, 95%response
Spectral response
8-14um
Emissivity
0.95
Ambient operating
range
0℃to ~60℃(32 to 1400F)
Relative humidity
10-95% RH noncondensing
Storage temperature
-20~60℃(-4~1400F) without battery
Weight/dimensions
155g;165×72×41mm
Power
9V battery ,6F22 or NEDA 1604
Battery life
Laser models:12hrs
distance spot ratio
8:1
Above picture and content just for your reference.
Please be subject to the actual products if anything
different or updated. Please pardon for not
informing in advance.
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