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Chapter One
There is no battery pre-installed in KC901M 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 the
instrument works 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 KC901M. 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 the 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,
with the diameter of 18mm and the length of 65mm. The batteries must be qualified
with the related standards of the formal factories.
The KC901M can work with two or four batteries, ideally a set of four-batteries
to allow longer operation. The rated charging current of KC901M 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 and accordingly the peak currents are slightly higher than the ones
mentioned above.
The batteries must be of the same type and should be from the same batch.
Please do NOT mix new and used batteries
install them in ONE compartment. (See step 4 under Chart 1-2 below) Before
installing the batteries, please make sure that every battery has the same basic
voltage and the differences in the voltages between them is no larger than 50Mv,
otherwise they need equalizing by charge/discharge before being used.
Please take good care of the batteries based on the manual. Usually the low
-temperature resisting batteries can be used only in winter. When the temperature is
over 45 ℃ , since the KC901M's circuits will generate heat, the batteries set's
temperature will probably exceed 65℃. In this case, high temperature rated 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)
Installation Guide
:
and if only using two batteries, do NOT
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