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3. Place the battery compartment cover piece by sliding it into the top slid first. Place
screw at the bottom of the cover piece and tighten down with a screwdriver.
4. Push and hold down the button for 2 seconds to turn on the instrument.
Connecting External Power Source
The 880 can also be powered using an external AC adapter. The model 880 comes with this
adapter included in the package.
Note: For external power, use AC adapter rated for output 12VDC, 150mA, center pin positive
4mm connector only.
WARNING: Use of the incorrect adapter may damage the instrument.
To connect the adapter, do the following:
1. If a battery is installed, please check the battery compartment again insuring the
polarity of the battery matches the polarity as indicated by the labels inside the
compartment. If it is not, please remove and insert the battery with matching polarity.
If a battery is not installed, continue to the next step.
WARNING: DO NOT, at any time, connect an external power adapter when:
The battery inside the unit is NOT rechargeable. Doing so will cause the battery to
burst, be damaged, or possibly catch fire.
A battery is installed incorrectly (reverse polarity or non-matching polarity to
indicator of battery compartment). Doing so will damage the instrument and void
its warranty.
2. Connect the AC adapter connector into the right side panel of the instrument. See
Figure 6 below.
3. Now, connect the AC Adapter socket into an electrical outlet.
4. Push and hold down the button for 2 seconds to turn on the instrument.
Figure 5 - Battery Compartment
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