AEMC CA876 User manual


INFRARED K-THERMOMETER
WITH LASER CA876
ENGLISH User Manual
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Owner’s Record
The serial number for the Model CA872 is located inside the battery com-
partment of the instrument. Please record this number and purchase date
for your records.
INFRARED THERMOMETER MODEL CA872
CATALOG #: 2121.31
SERIAL #: _______________________________________________
PURCHASE DATE: ________________________________________
DISTRIBUTOR: ___________________________________________

Table of Contents
1. INTRODUCTION...................................................................2
1.1 International Electrical Symbols.....................................................3
1.2 Receiving Your Shipment...............................................................3
1.3 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 Mode Button ......................................................................5
2.2.3 Back-light and ▲Button..............................................6
2.2.4 Laser and ▼ Button....................................................6
3. SPECIFICATIONS.................................................................7
3.1 Environmental Specications.........................................................7
3.1.1 Infrared ..............................................................................7
3.1.2 K-Type ...............................................................................8
3.2 General Specications ...................................................................9
3.3 Safety Specications......................................................................9
4. OPERATION .......................................................................10
4.1 Infrared Measurement Considerations.........................................10
4.2 Recommendations before Operating ........................................... 11
4.3 Infrared Operation........................................................................12
4.4 K-Thermocouple Operation..........................................................12
4.5 Setting the Temperature Scale: °C or °F......................................13
4.6 Continuous Measurement ...........................................................13
5. MAINTENANCE..................................................................14
5.1 Replacing the Battery ..................................................................14
5.2 Cleaning.......................................................................................14
Repair and Calibration.................................................................................15
Technical and Sales Assistance ..................................................................15
Limited Warranty .........................................................................................16
Warranty Repairs.........................................................................................16

2 Infrared K-Thermometer Model CA876
CHAPTER 1
INTRODUCTION
Warning
• Thermometers are not designed to touch live electrical samples.
• Do not use this instrument with Thermocouple K when voltages
at the sample point exceed 24VDC or 24Vrms.
• Do not make temperature measurement in microwave ovens.
Leaking microwaves may result in burns and serious injuries.
• To prevent sensor damage, do not point the sensor lens directly
at the sun or any other source of strong infrared light.
• Do not look directly into the laser beam, and do not aim the laser
beam into eyes.
• 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 CA876 is not waterproof or dust-proof. Take necessary
precautions to protect it in wet or dusty environments.
• Repeated sharp exing can cause the thermocouple leads to
break. To prolong sensor life, avoid sharp bends in the thermo-
couple, especially near the connector.

Infrared K-Thermometer Model CA876 3
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.
Laser Radiation - DO NOT look into the laser beam.
Laser Output < 0.5mW, 670nm wavelength.
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 CA876................................Cat. #2121.34
Includes K-thermocouple, 9V Alkaline battery, rugged, shockproof, protective
safety holster and user manual.

4 Infrared K-Thermometer Model CA876
CHAPTER 2
PRODUCT FEATURES
2.1 Description
The AEMC®Model CA876 is a portable, easy-to-use, compact-sized digi-
tal infrared and K-thermocouple input thermometer, designed for simple
one-hand operation. It uses an infrared sensor with a user adjustable
emmisivity setting.
The thermometer is simply aimed at the target to be measured without
any physical contact when in the IR mode (non-contact temperature mea-
surement). An aiming laser enables the user to pinpoint the target. The
K-type thermocouple input may also be used. The thermometer includes a
programmable Alarm, which triggers on Hi or Lo, and a MIN or MAX Hold
function. The thermometer is supplied with a protective holster, built-in
sensor, and a K-type bead thermocouple. It also features a back-light LCD
display, an automatic data HOLD function, and Auto-OFF.
1. 3½ digit display
2. Mode selector
3. Back-light/Increase button
4. Laser/Decrease button
5. Power/Measure button
Auto OFF
1
2
3
4
5

Infrared K-Thermometer Model CA876 5
2.2 Button Functions
2.2.1 Center (Yellow) Button - MEAS
Press this button to turn the thermometer ON and perform a measure-
ment. When the button is released, the meter will automatically HOLD
(freeze) the last reading on the display for approximately 15 to 20 seconds
before automatically shuting OFF.
2.2.2 Mode Button
Pressing this button makes the thermometer enter and advance though
several functions including some programmable functions. The MODE
button is used to select a specic function (e.g. MIN, MAX) or to adjust an
Alarm or the emissivity.
To enter the mode program, press MODE once. SET is displayed in lower
right hand corner.
When pressed consecutively, it will scroll through the following settings:
ε→ε(Set) →ALM Hi (Set) →ALM Lo (Set) →MAX →MIN→K→ε
SET is displayed in the lower right hand corner of the display when a
selected function is programmable (ε, ALM Hi, ALM Lo).
ε: Emissivity may be adjusted with the and buttons to match a particu-
lar target. We recommend leaving it at 0.95 for general use.
ALM Hi: The Hi alarm set point is adjusted using the and buttons. When
this set point is reached the beeper will sound and ALM HI will be displayed.
ALM Lo: The Lo alarm set point is adjusted using the and buttons.
When this set point is reached the beeper will sound and ALM Lo will be
displayed.
MAX: The Max value measured will be displayed during measurement. While
in the MAX mode and when measuring, the MODE button will toggle the mea-
surement between MAX – MIN – Present reading – MAX.
MIN: The Min value measured will be displayed during measurement. While
in the MIN mode and when measuring, the MODE button will toggle the mea-
surement between MIN – Present reading – MAX – MIN.
K: The lower display will indicate the reading from the K-type thermocouple.
NOTE: If the thermometer is OFF, pressing the “MEAS” button for more than
4 seconds will set the thermometer in the MIN/MAX record mode when pow-
ered up.

6 Infrared K-Thermometer Model CA876
2.2.3 Back-light and Button
Press the button to turn the Back-light ON. Press again to turn OFF.
In the settings ε, ALM Hi and ALM Lo, the  button increases the numeri-
cal value displayed in the lower smaller display area. If held down, the
value change will increase in speed.
2.2.4 Laser and  Button
Pressing the button turns the laser ON or OFF. The symbol is
displayed in the upper left hand corner when the laser is ON.
Remove the laser cover before use.
The laser is activated when the “MEAS” button is pressed during a mea-
surement.
In the settings ε, ALM Hi and ALM Lo, the button decreases the numeri-
cal value displayed in the lower smaller display area. If held down, the
value change will decrease in speed.
NOTE: There is no ON/OFF button. The meter turns ON when the center
“MEAS” button is pressed, and will automatically shut OFF after approxi-
mately 15 to 20 seconds.

Infrared K-Thermometer Model CA876 7
CHAPTER 3
SPECIFICATIONS
3.1 EnvironmentalSpecications
3.1.1 INFRARED
Temperature Scale:
Celsius (°C) or Fahrenheit (°F) user-selectable
Temperature Range:
-4°F to 1022°F (-20°C to 550°C)
Display Resolution:
1°F / 1°C
Accuracy:
< 212°F (100°C) ± 10°F (5°C)
>212°F (100°C) ± 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
Laser:
Red, <1mW (670nm) Class II, 2 - 50 ft range
Spectral Response:
6 to 14μm nominal
Emissivity:
Pre-set @ 0.95, user-selectable from 0.10 to 1.00
Detection Element: Thermopile
Optical Lens: Fresnel Lens

8 Infrared K-Thermometer Model CA876
Field of View (FOV) ratio:
10:1 (Distance : Diameter)
The FOV is the ratio of the dis-
tance to the target to the target
diameter. When the target
diameter is small, it is impor-
tant to bring the thermometer
closer to the target to ensure
that only the target is mea-
sured, excluding the surroundings. Remember that the measurement size
is one-tenth the distance to the target. For example, if the thermometer is
at 10", then the size measured is 1".
3.1.2 K TYPE
Temperature Scale: Celsius (°C) or Fahrenheit (°F) - User-selectable
Measurement Range: -40° to 2000°F or -40° to 1350°C
Resolution: 0.1°F/°C or 1°F/°C
Accuracy: -328°F to 1999°F: ± 0.1% of Reading ± 2°F plus T.C.
-199°C to 1370°C: ± 0.1% of Reading ± 1°C plus T.C.
(Accuracy is specied for operating temperatures over the range of 64° to
82°F (18° to 28°C), for 1 year, excluding the sensor)
Temperature Coefcient:
0.1 times the applicable accuracy specication per °C from 0° to 18°C and
28° to 50°C
Input Protection:
24VDC or 24Vrms maximum input voltage on any combination of inputs
Sample Rate: 2.5 times per second
Input Connector:
Standard miniature thermocouple connectors (at blades spaced 7.9mm,
center-to-center)
Temperature Response:
Temperature indication follows Reference Temperature/Voltage Tables
N.I.S.T. Monograph 175 Revised to ITS-90 for K-type thermocouples
1" Ø
(25mm)
2" Ø
(50mm)
3" Ø
(75mm)
4" Ø
(100mm)
20" (500mm)
10"
(250mm)
0.63"
(16mm)
30" (750mm)
40" (1000mm)
Distance to
object