AC Operation
Due to the capacitive line input circuit, sudden voltage
changes may cause damaging input current transients. Avoid
operating this instrument from square-wave inverter supplies,
or other sources that produce large voltage transients.
If the internal batteries of the 212 become discharged to the
minimum operating level, continued operation can be obtained by
connecting the instrument to an AC power source. Due to the
circuitry connected with the internal battery charger, the AC power
line voltage must be at least 110 volts for operation in this manner.
Also, when operated with fully-charged batteries from an AC line
below about 110 volts and at a maximum trace intensity, the internal
batteries discharge slowly. Approximately 36 hours of continuous
operation can be obtained with fully charged batteries at maximum
intensity and a 104-volt line. The internal batteries cannot be
recharged while the instrument is being operated from the AC line.
If the instrument is to be operated on a power line other than
110 to 126 V AC, 58 to 62 Hz, refer to Option Information.
8
CAUTION
212 Operators Handbook
