COMARK KM812, KM814 Instruction Manual

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icon indicates a low battery.
is released; the word HOLD appears. The presence of the battery
Fahrenheit. The unit will hold the reading for 7 seconds after trigger
The backlit LCD displays the current temperature in Celsius or

DISPLAY

to Accurately Measure Temperatures.
unit is equipped with a laser, use the laser only for aiming. See How
Be sure to consider distance-to-spot size ratio and eld of view. If the
To measure a temperature, point unit at object and pull the trigger.

OPERATING THE UNIT

door is detachable.
positive side rst into the battery compartment. NOTE: The battery
between °C and °F, push the switch (see g 1). Insert the 9v battery
to access the C/F switch or to insert/remove the battery. To toggle
Pull open the unit’s handle using the nger indents near the trigger

°C/°F AND BATTERY

HOW TO OPERATE THE UNIT

(units with laser sighting)

WARNING

for aiming purposes only.
which is displayed on the unit. In units with a laser, the laser is used
electronics translate the information into a temperature reading
energy, which is collected and focused onto a detector. The units
object. The units optics sense emitted, reected, and transmitted
Infrared thermometers measure the surface temperature of an

HOW IT WORKS

or hard-to-reach objects without contact.
You can safely measure surface temperatures of hot, hazardous,
in less than a second.
just aim, pull the trigger, and read current surface temperatures
noncontact thermometer. Compact, rugged, and easy to use—
We are condent you will nd many uses for your handheld

INTRODUCTION

• Do not leave the unit on or near objects of high temperature
before use)
temperature changes—allow 30 minutes for unit to stabilize

• Thermal shock (caused by large or abrupt ambient

• Static electricity
heaters

• EMF (electro-magnetic elds) from arc welders, induction

FOLLOWING,
ALL MODELS SHOULD BE PROTECTED FROM THE

CAUTIONS

INDIRECTLY OFF REFLECTIVE SURFACES.

DO NOT POINT LASER DIRECTLY AT EYE OR

Specications subject to change without notice.

4:1
6:1

Laser Models: 12 hrs
Non-laser models: 22 hrs

(6 x 4 x 1.5 in)

without battery

@ up to +30°C (+86°F)

pre-set 0.97
pre-set 0.95

8–14 μm
7–18 μm

above +65°C (+150°F): 1.5% of reading
+0.2°F/°F)
below 0°C (+32°F): ±1°C +0.1°C/°C (±2°F
0°C to 65°C (+32°F to +150°F):±1°C (±2°F)
KM814FS for targets at:

-18°C to -1°C (0°F to +30°F) ±3°C (±5°F)
whichever is greater
±2% of reading or ±2°C (±3.5°F),

-1°C to +260°C (+30°F to +500°F):
KM812/KM814 for targets at:

-30°C to +200°C (-25°F to +400°F)

-18°C to +260°C (0°F to +500°F)

KM814FS
KM812/KM814
Distance to spot size

(Alkaline)
Typical battery life

Power 9V Alkaline battery

Weight / dimensions 227 g (0.5 lb); 152 x 101 x 38 mm

Storage temperature +20°C to +65°C (-4°F to +150°F)

Relative humidity 10–95% RH noncondensing,

Ambient operating range 0°C to +50°C (+32°F to +120°F)
KM814FS

KM812/KM814
Emissivity

KM814FS
KM812/KM814
Spectral response

Response time 500 mSec, 95% response

of 23°C [73°F])
operating temperature
(assumes ambient

Accuracy

Temperature display 0.5°C or 1.0°F

KM814FS
KM812 and KM814
Temperature Range

SPECIFICATIONS

HOW TO MEASURE TEMPERATURE
ACCURATELY

LOCATING A HOT SPOT

To nd a hot spot aim the thermometer outside the area of interest,
then scan across with an up and down motion until you locate the
hot spot.

FIELD OF VIEW

Make sure that the target is larger than the unit’s spot size. The
smaller the target, the closer you should be to it. When accuracy is
critical, make sure the target is at least twice as large as the spot
size.

DISTANCE & SPOT SIZE

As the distance from the object increases, the spot size of the area
measured by the unit becomes larger.

REMINDERS

• Not recommended for use in measuring shiny or polished metal
surfaces (stainless steel, aluminium, etc.).
See Emissivity.

• The unit cannot measure through transparent surfaces such
as glass. It will measure the surface temperature of the glass
instead.

• Steam, dust, smoke, etc., can prevent accurate measurement
by obstructing the units optics.

EMISSIVITY

Most organic materials and painted or oxidized surfaces have an
emissivity of 0.95 (pre-set in the unit) NOTE: KM814FS pre-set
at 0.97. Inaccurate readings will result from measuring shiny or
polished metal surfaces. To compensate, cover the surface to be
measured with masking tape or matt black paint. Allow time for the
tape to reach the same temperature as the the material underneath
it. Measure the temperature of the tape or painted surface.

MAINTENANCE

Lens Cleaning: Blow off loose particles using clean compressed
air. Gently brush remaining debris away with a camel hair brush.
Carefully wipe the surface with a moist cotton swab. The swab
may be moistened with water.
NOTE: DO NOT use solvents to clean the plastic lens.
Case Cleaning: Use soap and water on a damp sponge or soft cloth.
NOTE: DO NOT submerge the unit in water

TROUBLESHOOTING

CODE PROBLEM ACTION

– – – (on display) Target temperature

Battery icon appears Possible low battery Check and/or

Blank display Possible dead battery Check and/or

Laser doesn’t work Low or dead battery Replace battery

is over or under range

Select target
within
specications

replace battery

replace battery

CE CERTIFICATION

This instrument conforms to the following standards:

• EN50081-1:1992, Electromagnetic Emissions

• EN50082-1:1992, Electromagnetic Susceptibility

Tests were conducted using a frequency range of 27–500 MHz with
the instrument in three orientations. The average error for the three
orientations is ±4.8°C (±8.6°F) at 3 V/m throughout the spectrum.
However, between 190 MHz and 500 MHz at 3 V/m, the instrument
may not meet its stated accuracy.

WARRANTY

All Comark instruments have a minimum one year warranty unless
otherwise stated. The warranty period for temperature probes is for
six months and all other probes and electrodes are unwarranted
because the conditions of use are beyond our control.

The Comark warranty covers manufacturing defects and component
failure and applies worldwide. The warranty does not affect your
statutory rights. In line with our policy of continuous development
we reserve the right to alter any product specications
without notice.

Comark Instruments,
52 Hurricane Way,
Norwich, Norfolk
NR6 6JB
United Kingdom
Tel: [phone]
Fax: [phone]
Email: [e-mail]

www.comarkinstruments.com

876

KM812, KM814 AND KM814FS

INFRATRACE COMPACT

NONCONTACT THERMOMETERS

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