421509-en-GB_v2.6 8/16
8
Battery Replacement
Replace the battery when the low battery indication symbol appears on the upper left corner of the
display. To replace the battery, remove the protective rubber holster to access the battery
compartment. Remove the two screws that secure the rear battery compartment cover. Remove the
old battery, install a new one, and replace cover.
RS-232 PC Interface
The Model 421509 Thermometer is supplied with a Windows® software package on CD-ROM. A
communications cable (meter to PC) is also supplied. The program allows the user to operate the
meter remotely and view the readings from all three LCD fields on the PC monitor. The software also
permits measurement data to be stored as text files on a PC. The data files can then be exported to
spreadsheet or other programs for further manipulation (graphing, sorting, filing, etc.).
Connecting the Meter to a PC
Connect the Optical Interface connector to the 421509 Thermometer. The “IR2” label should be facing
up. Connect the USB connector to the PC (COM port 1 -16).
PC Requirements
Note: Please visit the www.extech.com website for the latest software, user manuals, operating
system compatibility, etc., as requirements and other information may change from time to time.
486-33 IBM compatible PC or better
One CD-ROM drive
Available USB port.
Windows XP, Windows 7, Windows 8.1 and Windows 10
USB cable part # 421509-USBCBL
Please consult the separate Software Help guide for instructions on how to use the software.
Copyright
©
2013
‐
2016
FLIR
Systems,
Inc.
All
rights
reserved
including
the
right
of
reproduction
in
whole
or
in
part
in
any
form
www.extech.com
