Extech Instruments HD300-NIST User Manual page 7

Battery Replacement
When the battery icon appears on the LCD, the 9V battery must be replaced.
1. The battery compartment is located on the rear of the meter.
2. Press in and down on the arrow located above the tilt stand hinge.
3. Replace the 9V battery and the battery cover
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.
Other Battery Safety Reminders
o Never dispose of batteries in a fire. Batteries may explode or leak.
o Never mix battery types. Always install new batteries of the same type.
Auto Power OFF override
The HD300 is programmed to turn off automatically after idling for 15 minutes. This is designed to
save battery life in the event the meter is left ON inadvertently. (Note: When the meter is in the
"CFF/CMM" or "Average" mode, Auto Power Off is disabled.)
To over-ride this feature:
1. Turn the meter OFF
2. Turn the meter ON while holding down the IRT
3. Release the button when
4. The meter will now remain ON until the user manually turns if OFF.
5. The next time the meter is turned OFF the Auto Power OFF function will be re-activated.
USB PC Interface and Software
The HD300 is equipped with a communication jack on its upper left side. The supplied
communications cable connects to this jack and to a USB port on a PC. The supplied software
allows the user to view and save readings to the PC. Instructions for use and features are detailed
in the supplied software HELP utility.
button.
appears in the display.
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