AEMC CA870 User manual


INFRARED THERMOMETER CA870
ENGLISH User Manual
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Owner’s Record
The serial number for the Model CA870 is located inside the battery com-
partment of the instrument. Please record this number and purchase date
for your records.
INFRARED THERMOMETER MODEL CA870
CATALOG #: 2121.30
SERIAL #: _______________________________________________
PURCHASE DATE: ________________________________________
DISTRIBUTOR: ___________________________________________

Table of Contents
1. INTRODUCTION...................................................................2
1.1 Receiving Your Shipment...............................................................3
1.2 Ordering Information ......................................................................3
2. PRODUCT FEATURES ..........................................................4
2.1 Description .....................................................................................4
2.2 Button Functions ............................................................................5
2.2.1 Center (Yellow) Button - MEAS .........................................5
2.2.2 °C/°F Button ......................................................................5
2.2.3 Back-light Button ...............................................................5
3. SPECIFICATIONS.................................................................6
3.1 ElectricalSpecications .................................................................6
3.2 GeneralSpecications ...................................................................7
3.3 SafetySpecications......................................................................7
4. OPERATION .........................................................................8
4.1 Measurement Considerations ........................................................8
4.2 Recommendations before Operating .............................................8
4.3 Operating Instructions....................................................................9
5. MAINTENANCE..................................................................10
5.1 Replacing the Battery...................................................................10
5.2 Cleaning.......................................................................................10
Repair and Calibration................................................................................. 11
Technical and Sales Assistance .................................................................. 11
Limited Warranty .........................................................................................12
Warranty Repairs.........................................................................................12

2 Infrared Thermometer Model CA870
CHAPTER 1
INTRODUCTION
Warning
• Thermometers are not designed to touch live electrical sam-
ples.
• To prevent sensor damage, do not point the sensor lens directly
at the sun or any other source of strong infrared light.
• Do not place the infrared thermometer directly on or close to
objects at temperatures exceeding 158°F (70°C)
• To prevent measurement errors, do not expose the thermom-
etertostrongelectricalorelectromagneticelds.
• To prevent sensor damage and erroneous readings, do not
put the sensor lens into contact with any body or foreign/loose
material when measuring. Keep the sensor perfectly clean.
• Do not touch the sensor when taking measurements as it may
affect the readings.
• When the meter is exposed to sudden temperature changes
(hot or cold), allow 20 minutes of stabilization before taking a
reading.
• Be certain there is no condensation on the lens prior to taking
measurements. Allow 10 minutes for condensation to dissipate
as needed.
• The Model CA870 is not waterproof or dust-proof. Take neces-
sary precautions to protect it in wet or dusty environments.
1.1 International Electrical Symbols
This symbol on an instrument indicates a WARNING and that
the operator must refer to the user manual for instructions before
operating the instrument. In a manual, the symbol preceding
instructions indicates that if the instructions are not followed, bodily
injury, installation/sample and product damage may result.

Infrared Thermometer Model CA870 3
1.2 Receiving Your Shipment
Upon receiving your shipment, make sure that the contents are consis-
tent with the packing list. Notify your distributor of any missing items. If
theequipmentappearstobedamaged,leaclaimimmediatelywiththe
carrier and notify your distributor at once, giving a detailed description of
any damage. Save the damaged packing container to substantiate your
claim.
1.3 Ordering Information
Infrared Thermometer Model CA870................................Cat. #2121.30
Includes 9V Alkaline battery, rugged, shockproof, protective holster and user
manual.

4 Infrared Thermometer Model CA870
CHAPTER 2
PRODUCT FEATURES
2.1 Description
The Model CA870 is a portable, easy-to-use, compact-sized digital infra-
red thermometer designed for simple one-hand operation.
Itusesaninfraredsensorwithaxedemmisivityof0.95.Thethermometer
is simply aimed at the target to be measured without any physical contact
(non-contact temperature measurement).
The thermometer is supplied with a protective holster, built-in sensor and
also features a back-lit LCD display, an automatic data HOLD function,
and Auto-OFF.
1. 3½ digit display
2. Temperature selector
3. Back-light button
4. Power/measure button
Auto OFF
1
2 3
4

Infrared Thermometer Model CA870 5
2.2 Button Functions
2.2.1 Center (Yellow) Button - MEAS
Press this button to turn the thermometer ON and perform a measurement.
When the button is released, the meter will automatically HOLD (freeze)
the last reading on the display for approximately 20 seconds before auto-
matically shuting OFF.
2.2.2 °C/°F Button
Pressing this button makes the thermometer toggle between °F and °C.
The selected temperature type is displayed in the lower right hand corner
of the LCD. At power-up, the thermometer is in °C by default.
2.2.3 Back-light Button
Press the button to turn the Back-light ON. Press again to turn OFF.
NOTE: There is no ON/OFF button. The thermometer turns ON when the
center “MEAS” button is pressed, and will automatically shut OFF after 20
seconds.

6 Infrared Thermometer Model CA870
CHAPTER 3
SPECIFICATIONS
3.1 ElectricalSpecications
Temperature Range: -4° to 500°F (-20° to 260°C)
Display Resolution: 1°F/°C
Accuracy:
±2% of reading or ±6°F (3°C), whichever is greater @ 64.4 to 82.4°F (18
to 28°C) ambient operating temperature.
Temperature Coefcient:
Changes in accuracy operating temperature above 82.4°F (28°C) or below
64.4°F (18°C): ±0.2% of reading or ±0.36°F (0.2°C), whichever is greater.
Response Time: 1 second
Spectral Response:6to14μmnominal
Emissivity: Preset @ 0.95
Detection Element: Thermopile
Optical Lens: Fresnel Lens
Field of View (FOV) ratio:
10:1 (Distance : Diameter)
The FOV is the ratio of the
distance to the target to the
target diameter. When the
target diameter is small, it is
important to bring the ther-
mometer closer to the target
to ensure that only the target
is measured, excluding the
surroundings. Remember that the measurement size is one-tenth the dis-
tance to the target. For example, if the thermometer is at 10", then the size
measured is 1".
25Ø
500
250
50Ø 75Ø 100Ø
750
1000
Distance to
object (mm)

Infrared Thermometer Model CA870 7
3.2 GeneralSpecications
Display: 3½ digit liquid crystal display (LCD) with maximum reading of
1999
Low Battery Indication: is displayed when battery voltage drops
below required level
Sample Rate: 2.5 times per second, nominal
Operating Temperature: 32° to 122°F (0° to 50°C) at < 80% RH
Storage Temperature:
-4° to 140°F (-20° to 60°C), 0 to 80% RH with battery removed
Auto Power Off: 15 seconds approx
Altitude: 2000m max
Input Protection: 24VDC or 24rms maximum input voltage on any combi-
nation of inputs
Battery: Standard 9V battery (NEDA 1604, 6LR61 or equivalent)
Battery Life: 100 hours (continuity) typical with carbon zinc battery (back-
light not illuminated)
Dimensions: 6.81 x 2.38 x 1.5" (173 x 60.5 x 38mm)
Weight: Approx 6.5 oz (183g) including battery
3.3 SafetySpecications
EN 61010-1 (1995-A2), Protection Class III
Overvoltage Category (CAT III, 24V), Pollution Degree 2
Indoor Use
*All specications are subject to change without notice

8 Infrared Thermometer Model CA870
CHAPTER 4
OPERATION
4.1 Measurement Considerations
MEASUREMENT THEORY: Every object emits infrared (IR) energy pro-
portional to its temperature. By measuring the amount of this radiant
energy, it is possible to determine the temperature of the emitting object.
Infrared radiation is invisible light (electromagnetic radiation), which easily
travels through air and is easily absorbed by solid matter. An IR thermom-
eter, which operates by detecting infrared radiation, can accurately mea-
sure an object surface temperature without touching it and independently
of the air temperature or the measurement distance.
Infrared radiation, which is emitted from the object, is focused into an infra-
red radiation sensor through an optical system. This system includes an
optical lens, which is transparent to infrared radiation, and a 5.3μm cut
offlter.Theoutputsignalfromtheinfraredradiationsensorisinputtoan
electronic circuit, along with the output signal from a standard temperature
sensor, to calculate the temperature and display it on the meter display.
4.2 Recommendations before Operating
• If the measured surface target diameter is less than 2"/50mm Ø, then
place the sensor as close as possible to the target surface (<20"/50cm
away).SeeFieldofView(FOV)informationunderSpecications.
• If the target surface is covered with frost or any matter, clean it before
taking a measurement.
• Ifthetargetsurfaceishighlyreectiveputsomemattetape,ormatte
paint, over it before measuring.
• If the Thermometer is erratic, or seems not to be measuring properly,
make sure that the sensor is clean and not covered by condensation.