TM 11-6625-444-14-2
*For optimum Ratio performance within the EXT REF voltage operating limits of 1 V to 2 V
use the 2 volt RANGE. AUTO range operation in DC/DC RATlO mode is only applicable for in-
put voltages greater than 2 volts using the 20V, 200V and 1000V ranges.
voltmeter will be in the 2V full scale range con-
dition. When a voltage is applied that results in
a count higher than (approximately) 195,000,
When the AUTO switch is pushed in to the AU-
The
the next higher range will be selected.
TO position, ranging is automatically controlled
voltmeter is fully protected for any signal to
by the up/down range detectors (A1-U404 and
1000 Vdc and 1000 Vac rms. If the voltage is
changed to a level lower than (approximately)
U405 respectively) and, in turn, the commands
to the up/down counter. For automatic voltage
12,000 counts, the next lower range will be se-
ranging in the absense of any input signal, the
lected.
