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Model 451104 V2.0V 10/06 5
PC Interface
The meter is equipped with an RS-232c PC interface jack (3.5mm phono) for connection to
a PC. The cable to connect the meter to the PC is included in the optional 407752 data
acquisition kit. The kit includes Windows
TM
software that allows the user to store readings
in a text file and display real-time measurements in a series of selectable formats. For
more information or specific operating instructions, refer to the User Guide included with
the 407752 kit or contact Extech Instruments.
Battery Replacement
The meter is powered by one 9V Battery. If the
display does not switch on when the ON-OFF
button is pressed, replace the battery using the
procedure below.
1. Remove the Phillips head screw at the rear of
the meter (refer to diagram)
2. Open the battery compartment by removing
the compartment cover
3. Unsnap the old battery from the red and black
wire connectors
4. Snap in the new battery and carefully dress
the red and black wires so that they do not
crimp or rest in the hinges of the compartment
cover
5. Close the compartment cover
6. Tighten the Phillips head screw to secure the
compartment