Some Notes About Accuracy; Battery Condition - Circutor MH-10 Guia Del Usuario

Some notes about accuracy

In order to obtain the specified accuracy, the operator has to adjust the test
current to a value higher than the 80% of the nominal value. If it were neces-
sary, it is possible to use a lower current, but by doing this the accuracy will be
affected.
MH-10 has an auto-compensation system that automatically eliminates the error
produced by internal offset. Thus, it is not necessary to carry out measurements
by reversing the polarity in order to compute the average value. Nevertheless, if
the operator suspect that there is a difference of temperature between the con-
tact points that would can generate thermoelectric voltages, it is necessary to
carry out two measurements by reversing the current cables and so, the circula-
tion sense of the current through the resistance under measurement. The re-
sistance value to be measured will be the average between the values in one
sense and in the contrary (direct and inverse current).

Battery condition

The charge condition of the battery can be verified before or during the resis-
tance measurement. In order to achieve that, the operator has to press the
BATTERY. key while the equipment is turned on. The bar-graph shows re-
maining charge as a percentile value. If during measurement the charge of the
battery achieves a critical level, the display will show the BAT message notifying
that the charge level is low. After a few minutes the measurement will be auto-
matically interrupted in order to preserve the battery from a deep discharge that
is prejudicial for its expected useful life.
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