Sears Thermometer 50455 User Guide

Owner's Manual  
Non-Contact InfraRed (IR) Thermometer  
MODEL 50455  
CAUTION: Read, understand and  
follow Safety Rules and Operating  
Instructions in this manual before  
using this product.  
Safety  
Operation  
Maintenance  
Español  
© Sears, Roebuck and Co., Hoffman Estates, IL 60179 U.S.A.  
 
FULL ONE YEAR WARRANTY  
FULL ONE YEAR WARRANTY ON CRAFTSMAN InfraRed Thermometer  
If this CRAFTSMAN InfraRed Thermometer fails to give complete satisfaction within one year from  
the date of purchase, RETURN IT TO THE NEAREST SEARS STORE OR OTHER CRAFTSMAN  
OUTLET IN THE UNITED STATES, and Sears will replace it, free of charge.  
If this CRAFTSMAN InfraRed Thermometer is used for commercial or rental purposes, this warranty  
applies for 90 days from the date of purchase.  
This warranty gives you specific legal rights, and you may also have other rights which vary from  
state to state  
Sears, Roebuck and Co., Dept. 817WA, Hoffman Estates, IL 60179  
For Customer Assistance Call 9am-5 PM (EST)  
Monday through Friday 1-888-326-1006  
SAFETY INSTRUCTIONS  
USE EXTREME CAUTION when the laser pointer  
beam is on  
DO NOT point the beam toward anyone's eye or allow  
the beam to strike the eye from a reflective surface  
DO NOT use the laser near explosive gases or in  
other potentially explosive areas  
SPECIFICATIONS  
Range  
-4 to 500°F (-20 to 260°C)  
0.1°  
Resolution  
Accuracy  
-4 to 20°F (-20°C to -7°C): ±7.5°F (4°C)  
20 to 500°F (-7°C to 260°C): ±3% of reading or ±5°F/2.5°C (whichever  
is greater)  
Note: Accuracy is specified for an ambient temperature range of 64 to  
82°F (18 to 28°C)  
Emissivity  
Fixed 0.95  
Field of View  
D/S = Approx. 6:1 ratio (D = distance; S = spot or target)  
Class 2(II) laser < 1mW power; Wavelength is 630 to 670nm  
8 to 14 µm  
Laser pointer  
IR Spectral response  
Display  
Backlit LCD display with function indicators  
Less than 1 second  
Display update rate  
Operating Temperature  
Operating Humidity  
Power Supply  
Automatic Power Off  
Weight  
32°F to 122°F (0°C to 50°C)  
80% Relative Humidity max.  
9V battery  
Meter shuts off automatically after 8 seconds  
4.4 oz (125g)  
Dimensions  
3.15 x 1.25 x 5.4” (80x31.7x137mm)  
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CONTROLS  
Meter Description  
1. Laser pointer  
2. IR sensor  
3. Measurement trigger  
4. LCD display  
5. Function buttons*  
6. Battery compartment  
Function Buttons  
Max/Min: Select Max or Minimum display.  
°C/°F: Select temperature units  
Backlight / Laser Pointer: For turning the LCD backlight or the Laser pointer ON/OFF  
DISPLAY DESCRIPTION  
1. Displays SCAN when trigger is depressed;  
2. Displays HOLD when trigger is released  
3. Laser pointer ON  
4. Emmisivity setting (0.95)  
5. Temperature units  
6. Low battery  
7. Max/Min display  
8. Temperature display  
BATTERY INSTALLATION  
When the low battery symbol appears on the LCD, replace the meter’s  
battery (9V). The battery compartment is located in the rear of the handle.  
Open the compartment by carefully pulling the panel down. The panel is  
hinged at the bottom and does not completely disconnect from the meter.  
Replace the 9V battery and close the battery compartment cover.  
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OPERATING INSTRUCTIONS  
Power  
1. The meter is powered by one (1) 9V battery.  
IR Measurements  
1. Hold the meter by its handle and point it toward the surface to be measured.  
2. Pull and hold the trigger to turn the meter on and begin testing. The temperature reading, the  
flashing ‘SCAN’ icon, the emissivity, the unit of measure and other icons as shown in the  
Display Description will appear. Note: Replace the meter’s 9V battery if the display does not  
switch on.  
3. Release the Trigger and the reading will hold for approximately 8 seconds (HOLD will appear on  
the LCD) after which the meter will automatically shut off.  
Temperature units  
With the trigger pressed, press the ºF/ºC button to select the temperature units.  
Backlight/Laser Pointer  
With the trigger pressed:  
1. Press the  
button once to change the state of the backlight (On or Off). When the laser is  
on the laser icon will appear in the display.  
2. Press the  
button again to change the state of the backlight (On or Off).  
IR Measurement Notes  
1. The object under test should be larger than the spot (target) size calculated by the field of view  
diagram (printed on the side of the meter and in this guide).  
2. Before measuring, be sure to clean surfaces that are covered with frost, oil, grime, etc.  
3. If an object's surface is highly reflective, apply masking tape or flat black paint to the surface  
before measuring. Allow time for the paint or tape to adjust to the temperature of the surface it is  
covering.  
4. Measurements through transparent surfaces such as glass may not be accurate.  
5. Steam, dust, smoke, etc. can obscure measurements.  
6. The meter automatically compensates for deviations in ambient temperature. However, it can  
take up to 30 minutes for the meter to adjust to extremely wide changes.  
7. To find a hot spot, aim the meter outside the area of interest then scan across (in an up and  
down motion) until the hot spot is located.  
5
 
Field of View  
As the distance from the object increases, the spot size of the area measured becomes larger. The  
meter’s field of view is 6:1; in other words if the meter is 6 inches from the target (spot), the diameter  
of the target must be at least 1 inch. Note that measurements should normally be made as close as  
possible to the device under test. The meter can measure from moderate distances but the  
measurement may be affected by external sources of light. In addition, the spot size may be so  
large that it encompasses surface areas not intended to be measured.  
TROUBLESHOOTING  
There may be times when your meter does not operate properly. Here are some common problems  
that you may have and some easy solutions to them.  
Meter Does Not Operate:  
1. Always read all the instructions in this manual before use.  
2. Check to be sure the battery is properly installed.  
3. Check to be sure the battery is good.  
If You Do Not Understand How the Meter Works:  
Call our Customer Service Line 1-888-326-1006.  
SERVICE AND PARTS  
For replacement parts shipped directly to your home  
Call 9 am – 5 pm Eastern Time, M - F  
1-888-326-1006  
6
 

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