Harbor Freight Tools Thermometer 92242 User Manual

DIGITAL THERMOMETER  
92242  
ASSEMBLY & OPERATING INSTRUCTIONS  
®
3491 Mission Oaks Blvd., Camarillo, CA 93011  
Copyright© 2004 by Harbor Freight Tools®. All rights reserved. No portion of this manual or  
any artwork contained herein may be reproduced in any shape or form without the  
express written consent of Harbor Freight Tools.  
For technical questions and replacement parts please call 1-800-444-3353.  
 
6. Do not operate product if under the influence of alcohol or drugs. Read warning labels on  
prescriptions to determine if your judgment or reflexes are impaired while taking drugs. If there  
is any doubt, do not operate the product.  
7. Use only Batteries of the type recommended-size, 9V D/C.  
8. Do not mix old and new batteries. Do not use different types of batteries.  
9. Keep children away. Children must never be allowed in the work area. Do not let them handle  
the DigitalThermometer.  
10. Remove the battery if the Thermometer is not used for a long period of time.  
11. Repeated sharp flexing can break the thermocouple leads. Avoid sharp bends in the  
leads, especially near the connector.  
Note:  
Always switch to a fresh battery when tool performance begins to diminish.  
This is a delicate instrument, do not drop or jar the Digital Thermometer.  
Warning:  
The warnings, cautions, and instructions discussed in this instruction manual cannot  
cover all possible conditions and situations that may occur. It must be understood by  
the operator that common sense and caution are factors which cannot be built into  
this product, but must be supplied by the operator.  
Unpacking  
When unpacking your Digital Thermometer, check to make sure the following parts are included. If  
any parts are missing or broken, please call HARBOR FREIGHT TOOLS at 1-800-444-3353.  
Assembly  
Your Digital Thermometer requires only minor assembly. It is important that you read the entire  
manual to become familiar with the product BEFORE you assemble and use the Digital  
Thermometer. Before assembling and operating the Digital Thermometer be sure that you have all  
parts described in the Parts List and Assembly Diagram located on the last pages of this manual.  
Turning the Thermometer “ON” and “OFF”  
1.  
2.  
Insert the battery into the battery compartment. Refer to the section on page 5 titled,  
“Replacing the Battery.”  
Turn on the Thermometer by pressing the “ON/OFF” Switch located at the top of the  
Thermometer-see Figure 1 on page 4.  
SKU 92242 For technical questions please call 1-800-444-3353.  
Page 3  
 
Setting to the Desired Type of Measurement  
The Thermometer readings can be set to be displayed in Celsius, Fahrenheit or Kelvin.  
1.  
2.  
Turn on the Thermometer by pressing the “ON/OFF” Switch located at the top of the  
Thermometer-see Figure 1.  
The Thermometer will display a temperature along with a letter showing the present degree  
setting. For example, a measurement of 70 degrees Fahrenheit will read 70 F. Degrees in  
Celsius will be followed by a small C and Kelvin by a small K.  
3.  
Press the C-Celsius, F-Fahrenheit or K-Kelvin button located at the bottom of the  
Thermometer face-see Figure 2. The Thermometer will display the selected setting.  
Displaying the Maximum Mode  
1.  
2.  
3.  
1.  
The Thermometer can record and update the maximum values for the most recent readings.  
Press the MAX button, which is one of four buttons, located on the right side of the  
Thermometer face-see Figure 1.  
Pressing the MAX button will cause the Thermometer to remember, record and display the  
most recent maximum temperature reached. The word “ Max” will be displayed along with  
the temperature.  
To turn off the Maximum function, press the MAX button again.  
Selecting Display in 1 Degree or Tenths of a Degree  
The Thermometer will allow you to choose to have the temperature displayed in increments  
of degrees for Celsius and for Fahrenheit. You can have the temperature displayed in tenths  
of a degree, such as 0.1°C or 0.1°F. You can have the temperature displayed in whole  
degrees such as 1°C or 1°F-see Figure 1.  
2.  
3.  
Pressing the Tenth of a Degree Key (“0.1”) will display the temperature in tenths of a degree-  
see Figure 1.  
Pressing the Whole number key (“1°”) will display the temperature in increments of 1 degree.  
Figure 1-Thermometer Control Buttons  
LCD Display  
On/Off Button  
Backlight Button  
Maximum  
Temperature Coefficient  
Celsius  
Tenth Display  
Hold  
Whole Number Display  
Kelvin  
Fahrenheit  
SKU 92242 For technical questions please call 1-800-444-3353.  
Page 4  
 
Holding a Temperature Display  
1.  
2.  
The “HOLD” key is located on the right side of the Thermometer face and is one of the four  
buttons surrounding the “TYPE” button. Pressing the “HOLD” key will cause the  
Thermometer to display the present readings. It will display only the present reading and will  
stop all future measurements-see Figure 1.  
To turn off the “HOLD” setting, press the “HOLD” key again. This will resume normal  
display on ongoing measurements-see Figure 1.  
Backlighting the Display  
The Thermometer has a backlight feature which allows you to read the Thermometer display in  
situations where there is not enough light-see Figure 1.  
1.  
2.  
Press the Backlight key to light up the display.  
Press the Backlight again to turn the backlight off.  
Overload Display (1)  
The digital display will indicate “1” when the input exceeds the measurement range selected-see  
Figure 1.  
1.  
2.  
If the temperature you are measuring exceeds 199.9, change the display to read in  
increments of 1-see section on Selecting Display in 1 Degree or Tenths of a Degree.  
Make certain that the thermocouple connector is seated properly and that the leads are not  
broken.  
Thermocouple Checking  
1.  
First, allow time for the Thermometer to adjust to the ambient temperature. To check the  
accuracy of the Thermocouple reading, place the end of the Thermocouple away from any  
object. Press the Thermocouple Checking button (Tc) button. With the button down, the  
Thermometer will display the temperature reading inside the unit. Record the temperature  
reading.  
2.  
3.  
Release the button and allow time for the Thermometer to adjust to the ambient temperature.  
The Thermometer will display the exterior temperature. Record the temperature reading.  
The Thermocouple is reading correctly if the two temperatures are reading within the  
accuracy range specified on page 2. For example, when the thermometer reads 74.7°F with  
the Tc button on, and 74.2°F with the button off. There is a .5 degree difference in  
temperature shown.  
4.  
The degree of accuracy is + 4°F, or + .5% reading plus 2°. The reading is within this range  
and is accurate. Note that if accuracy is off it is generally a problem with the  
Thermocouple and not the Thermometer.  
Tripod  
The Thermometer can be set onto a Tripod (not included). Thread the receptacle on the back of the  
Thermometer onto the screw of the Tripod-see Figure 2 next page. The thread on the tripod mount is  
1/4”-20 and can be used with a tripod which fits this same size thread.  
SKU 92242 For technical questions please call 1-800-444-3353.  
Page 5  
 
Replacing the Battery  
1.  
A symbol of a battery will appear on the lower right LCD display when the 9V battery is  
running low and needs to be replaced.  
2.  
3.  
Turn the Thermometer “OFF” by pressing the “OFF” button. Remove the thermocoupler.  
Remove the rubber case which surrounds the Thermometer by gently pulling it off of the top  
of theThermometer.  
4.  
5.  
6.  
Unscrew the bolt holding the Battery Cover in place-see Figure 2. Remove the Battery  
Cover.  
Insert a new 9V battery into the battery compartment. Attach the battery plug to the battery  
making certain that the polarity is correct.  
Replace the Battery Cover and thread back in the Screw keeping the Cover in place.  
Replace the case covering the Thermometer.  
Figure 3  
Figure 2  
Thermocouple  
Stand pulls out  
for set up and  
reading of the  
Thermometer  
Battery connections  
Tripod mount  
Battery Cover Screws in here  
Operation  
1.  
Plug the Thermocoupler into the top of the Thermometer-see Figure 2.  
2.  
3.  
Set the end of the Thermocoupler at the place where you desire to measure temperature.  
Turn the Thermometer “ON.”  
4.  
5.  
The Thermometer has a stand which can be pulled out from the back and used to rest the  
Thermometer for easy reading of display.  
Turn the Thermometer “OFF” when you are done using it. Disconnect the Thermocoupler.  
Maintenance  
1.  
2.  
2.  
3.  
Never immerse the Thermometer in any fluid.  
Store in a dry and safe location out of the reach of children.  
Remove dust or stains with a soft lightly dampened cloth.  
Remove the battery if you are not going to use the Thermometer for a long period of time.  
No replacement parts are available for the Thermometer.  
SKU 92242 For technical questions please call 1-800-444-3353.  
Page 6  
 

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