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Chapter One Installation Guide
There is no battery pre-installed in KC901V except specifically asked. The batteries will
be installed by either the dealers or users themselves. Supply power with the power
adapter and verify it by starting up the instrument. After making sure that all func-
tions of the instrument work properly, Turn off the power and unplug the power
adapter, then you may install the batteries.
1.1 How to Choose Batteries
Lithium batteries can be used on KC901V. For a single cell, its charging cut-off
voltage is 4.2V, and the discharging cut-off voltage is 2.6V, with voltage rating of
3.6-3.7V. Batteries are connected with two in parallels then two groups in series. The
power management circuits provide the functions of overcharge protection,
over-discharge protection, balance protection and short-circuit protection.
The battery compartment is suitable to the cylindrical 18650 lithium batteries,
which the diameter is 18mm and the length is 65mm. The batteries must be qualified
with the related standards of the formal factories.
Thought KC901V can work with two or four batteries, four-batteries set is pre-
ferred. The rated charging current of KC901V is 1A. If there are only two batteries, for
single battery, the peak charging current is 1.2A. Peak discharging current is 1.5A; if
there are 4 batteries, charge/discharge load should be considered according to the
current which is lightly higher than the ones mentioned above.
The batteries must be the same type one and should be in the same batch. DO
NOT mix the new ones and old ones and do NOT try to use them together. Before put
the batteries into the instrument, make sure that every battery has the same basic
voltage and the differences of the voltages shouldn't be larger than 50mV, otherwise
they need to be balanced the charge/discharge before being used.
Take care of the batteries based on the manual. Usually the low temperature re-
sisting batteries can be used only in winter. When the temperature is over 45℃, since
the KC901V's circuits will generate heat, the batteries set's temperature will probably
be over 65℃. In this case, high temperature resisting batteries must be used.
1.2 How to Install Batteries
Required tools: one 2mm hexagon screwdriver.
Step 1: Place the instrument flatwise on the desk and take out the two screws
from the bottom. (Chart 1-1)
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