2. BASIC OPERATION
To display a thermal image (thermogram), ensure the camera’s lens flap is in the up position, uncovering the IR
lens. Then turn ON the camera and point it at the target object. The thermogram appears in the camera’s main
screen (see
When default settings are in effect, to stop data acquisition and freeze the image on the display, press
F2
.
When the image is frozen, the
F2
button function becomes
. Press this button to unfreeze the image and
resume data acquisition.
2.1. Measurement Cursor
Below the image is the Measurements display area (see
). The displayed
data depends on the measurement cursor setting. By default, no measurement
cursor is selected, resulting in no measurement data displayed in the screen. To
change the cursor setting:
1. Press
F1
in the Main screen and select
to open the Display
menu.
2. Select
to display the Cursor menu (shown to the left).
3. Select the desired cursor type. The following sections describe what
measurement data is displayed when each type of cursor is selected.
4. Save the cursor setting by pressing
F2
.
2.1.1. Estimating Measurements Without a Cursor
By default, no measurement cursor is selected (the
icon in the Cursor menu is highlighted). Note that even
with no displayed measurements, you can still estimate temperature from the color palette. The color distribution
between minimum and maximum palette temperatures is linear, so simply interpolating based on the position of
the color in the palette provides an estimated temperature.
For example, to estimate the temperature at a specific point in the thermogram, find the location of its color in the
palette. If the color appears to be in the center of the palette, the temperature is approximately:
(T
min
+ T
max
) / 2
…in other words the mean of the minimum and maximum temperatures of the palette.
If the color lies in the 1st quartile:
T
min
+ (T
max
- T
min
) / 4
…and so on.
2.1.2. Locating Hot and Cold Spots in an Image (MinMax)
The
MinMax
cursor option displays two cursors on the screen. One locks onto the location of the highest
temperature in the image, the other locks onto the lowest temperature. These minimum and maximum
temperatures are also displayed in the Measurements area of the screen.
15
Summary of Contents for 2121.40
Page 1: ...Model 1950 ENGLISH User Manual THERMAL CAMERA...
Page 2: ...2...
Page 35: ...APPENDIX A MENU TREE Display Files and Setup Menus 35...
Page 36: ...Target Parameters and About Menus 36...
Page 37: ...Recall Menus 37...
Page 42: ...NOTES 42...
Page 43: ...NOTES 43...
