90539493 TLD100 manual.qxd 9/8/08 7:42 AM Page 4
ASSEMBLY/SET-UP
Changing the Temperature Display and Installing the Battery
Note: The Thermal Leak Detector requires one 9V alkaline battery, not included.
•Open the battery compartment cover by pressing the tabs of the cover in towards the center and pulling the cover out.
•The factory setting for the temperature display is Fahrenheit (switch on left side “F” setting). If you would like the LCD screen to display the temperature in Centigrade, slide the switch shown in figure 1 to the right (“C” setting).
•Insert a fresh 9 volt battery (figure 2) making sure to match (+) and
•Replace the battery compartment cover.
1 |
|
|
| F | C |
F | C |
|
2 |
|
|
Using the Thermal Leak Detector | 7 |
| |
• Hold the unit as shown in figure 7 and | REP |
aim near the location you want to scan | SCAN |
for a draft or thermal leak. This initial |
|
aim point will be your reference target. |
|
• Turn on the power.
• Keep the unit aimed at the reference target until the green light shines on the target and a Reference Temperature appears on the screen.
• Slowly scan the Thermal Leak Detector across the area of interest. If the scanned temperature is hotter than the reference temperature by more than the
threshold, the light will turn from green to red. If the scanned temperature is colder than the reference temperature by more than the threshold, the light will turn from green to blue.
Examples of Use:
•Scan around a light fixture to determine if ceiling insulation was removed during installation.
•Scan along window and door sills to see where to add
•Scan where a wall and the floor meet to find drafts that should be caulked.
•Scan an attic door to see if you need to add insulation.
NOTES:
•Shiny or polished surfaces can give inaccurate readings. To compensate for this, cover the surface with masking tape or flat colored paint. When the tape or paint reaches the same temperature as the target underneath, measure the temperature of the item.
•The thermometer cannot measure through transparent surfaces such as glass or plastic. It will measure the surface temperature instead.
•Steam, dust, smoke, and other optical obstructions can prevent accurate measurement. Hold the thermometer back and at an angle for an accurate measurement.
OPERATION
Switching On and Off
•Press the ON/OFF button to turn the unit on.
•Press the ON/OFF button a second time to turn the unit off.
NOTE: The unit will automatically turn off after 10 minutes. | 3 |
Setting Threshold for Color Change:
•For detecting small temperature changes of 1º F (0.5º C), move the slider to the 1º mark on the back of the detector. (figure 3)
• | For detecting medium temperature changes of 5º F (3º C), move the slider | 4 |
| to the 5º mark on the back of the Detector. (figure 4) |
|
• | For detecting large temperature changes of more than 10º F (5.5º C), | 5 |
| move the slider to the 10º mark on the back of the Detector. (figure 5) |
•If you do not want the LED spot to change color, move the slider to the top position where the color spots are
You can change the threshold setting while you are scanning. If the color is | 6 |
changing erratically, try increasing the threshold. If you see a temperature difference on the screen, but the light is not changing color, try reducing the threshold.
4
Field of View
The Thermal Leak Detector measures temperature over an area that may be larger than the LED spot, especially if you are far away from the surface you are measuring. The diameter of the measured area is 1/6 the distance from the Detector. In other words, if you are 6 inches (152 mm) from the target, the Detector will measure the average temperature over a circle 1 inch (25mm) in diameter. As shown in the illustration below, the farther the distance from the target, the larger the measured area.
If you are just looking for hot and cold areas, it's OK if the scanned area is larger than your target. However, if you want to accurately measure the temperature of an object, move the Detector close so that the scanned area is about half the size of the object you want to measure.
|
|
| s |
|
| 3 inches | 4 inche |
| 2 inches | mm) | |
1 inch | (76mm) | (102 | |
(51mm) |
| ||
(25mm) |
|
| |
|
|
|
6 inches
(152mm) 12 inches (305mm) 18 inches
(457mm)
24 inches (610mm)
5
