Circutor MI-10KV Technical Specifications And Operating Instructions page 9

M I-10KV
13) Checking battery status. Battery measurement can be performed
without interrupting high-voltage generation, which will provide a better
evaluation of the battery status, by pressing the BATTERY key during
the measurement. So, the battery test is performed under actual
consumption conditions and, for long lasting measurements, (i.e.
Polarization Index), the evolution of battery status can be checked
without affecting the measurement.
The meter pointer should stop over the blue zone. If the pointer stop
over the red zone this means that the battery is discharged and shall be
charged
14) Infinite setting. The mechanical zero of galvanometer must be
periodically checked. In order perform this checking, be sure that the
megohmmeter is off. The pointer should stay on the right end of the
scale just over the infinite mark on scale C. In other case, the plastic
screw at the bottom of the galvanometer acrylic cover shall be adjusted.
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