7451A/7461A/7461P Digital Multimeter Operation Manual
4.2.1 Measurement Functions
4-8
3. AC voltage measurement (ACV and ACV(AC+DC))
ACV measurement
1. Press .
AC voltage with AC coupling is measured.
2. Pressing continuously
switches the AC filter in turn.
ACV(AC+DC) measurement
3. Press
and
.
ACV and DCV are measured and the root mean square value (
)
is displayed.
The AC and DC indicators are turned on to show the AC+DC coupling.
4. Pressing continuously
switches the AC filter in turn.
5. Press
and
to return to the ACV measurement.
Selecting the AC filter
In this instrument, the AC filter can be selected from three for the accuracy optimization in low fre-
quency and the high speed response.
Select the AC filter in consideration of the measurement signal frequency, necessary measurement
accuracy, and response time.
Table 4-5 Selecting the AC Filter
AC filter
Measurement signal frequency Response time *1
Display
FAST
300 Hz to 300 kHz
100 msec
ACF
MED
20 Hz to 300 kHz
500 msec
ACM
SLOW
20 Hz to 300 kHz
3 sec
ACS
*1:
Time until the measurement value reaches within 0.1% of the final value
Table 4-6 Maximum Allowable Applied Voltage (ACV and ACV(AC+DC))
Between V and COM
1000 Vpeak, 700 Vrms, 2.2
10
7
VHz
Between COM and chassis 500 V
ACV
ACV
SHIFT
ACV
ACV
2
+DCV
2
ACV
SHIFT
ACV
