Extech Instruments 407355-NIST User Manual page 9

PC Interface
This meter has the capability to connect to and communicate with a PC. To install and use the
software, please refer to the instructions provided on the supplied CD-ROM and/or the instructions
provided in the HELP Utility within the software program.
Check the software download page of the website www.extech.com for the latest version of the PC
software and its operating system compatibility.
Battery Replacement and Status Display
The 407355 is powered by four (4) 'AAA' 1.5V batteries and the LCD display employs a 5-segment
battery status indicator.
5-segment battery LCD status indicator
When the batteries are fully charged, all five segments of the indicator will be visible. As the
batteries discharge, the segments switch off one by one. Do not use the instrument if all five
segments have switched off.
To replace the batteries:
1. Remove the large flat-head screw from the back of the instrument. This will free the belt clip;
remove the clip.
2. The discharged 1.5V 'AAA' batteries will be visible behind the clip.
3. Replace the batteries observing polarity.
4. Re-assemble the clip.
Never dispose of used batteries or rechargeable batteries in household waste.
As consumers, users are legally required to take used batteries to appropriate
collection sites, the retail store where the batteries were purchased, or wherever
batteries are sold.
Disposal: Do not dispose of this instrument in household waste. The user is obligated to take end-of-
life devices to a designated collection point for the disposal of electrical and electronic equipment.
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