2Using the Handheld Infrared Thermometer
AT C°F
8.Press and hold the FUNC key until the Emissivity Display Mode (E) appears.
9.Change the emissivity to the proper value for the target being measured (refer to Section 2.3.1).
10.Aim at the target. The target temperature and emissivity are displayed on the LCD.
11.After all data is taken, press the LOCK key to release this mode
NOTE
To disable the Ambient Target Temperature
Compensation at a later time, you must press the
FUNC key to get into the Ambient Target
Temperature Display Mode. Then press the LOCK
key to disable it.
NOTE
The target ambient temperature does not change when the thermometer is turned off. However, when the batteries are replaced, it is reset to the default value of 75°F.
2.3.12PC Interface Software (OS533E, OS534E, OS523E, OS524E)
Software Installation:
In order to install the PC interface software (IRTM), the PC should have the following minimum requirements:
Operating System: Windows 98SE, 2000, NT4.0, XP
32 MB RAM
Hard disk with a minimum of 20 MB free space
Place the CD into the CDROM drive. Click Start 
Run… from the start menu. Click Browse to find setup program from the CD and then click OK to run setup program. The setup program will guide you through the installation process.