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Press key to switch on or switch off the background light at any moment as you
need after power on. Since the light will consume more power, turn on it only when
necessary.
5.10 Auto Power Off
The instrument features an auto power off function designed to conserve
battery life. If the tool is idle (neither measuring nor any key operation) for 5
minutes, it will turn itself off. Before powering off, the LCD display of the instrument
will continue flashing for 20 seconds. To prevent the unit from powering off you can
press any button Except Power.
When the voltage of the battery gets too low, the display will show <E00>, then
power off automatically.
5.11 Battery Replacement
The 3811A uses standard AA batteries. After several hours of usage, the battery
symbol on the screen will begin to show less dark tabs which is shown as .
When the batteries are drained, the battery symbol will be shown as and will
begin to flash. When this occurs, the batteries should be replaced.
Pay attention to the polarity of the batteries!
Please properly dispose of used batteries accordingly.
5.12 Connecting to a Computer
The Instrument is equipped with a USB serial port. Using the output cable the
gauge has the ability to connect to a computer, or external storage device.
Measurement data stored in the memory of the gauge can be transferred to the
computer through the USB port.
5.13 Special Code Reference
6 Maintenance & Servicing
6.1 Impact Device Maintenance
• After the impact device has been used for 1000--2000 times, please use the
nylon brush provided to clean the guide tube and impact body. When
cleaning the guide tube, unscrew the support ring first, then take out the
impact body, spiral the nylon brush in counter-clockwise direction into the
bottom of guide tube and repeat a few times to remove any dust or small
chips inside the tube. Then install the impact body and support ring again.
• Release the impact body after use.
• NEVER USE LUBRICANT OR CLEANERS ON IMPACT DEVICE!
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