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
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