User`s manual

CALibration
The CALibration command subsystem selects the multimeter’s line reference
frequency (
CALibration:LFRequency) and enables/disables the autozero mode
(
CALibration:ZERO:AUTO).
Subsystem Syntax CALibration
:LFRequency <frequency>
:LFRequency? [MIN | MAX]
:ZERO:AUTO <mode>
:ZERO:AUTO?
:LFRequency
CALibration:LFRequency <frequency> selects the line reference frequency used
by the multimeter’s analog-to-digital converter.
Parameters
Parameter Name Parameter Type Range of Values Default Units
<frequency>
numeric 50 | 60 | MIN | MAX hertz
Comments •
MIN
selects the minimum line reference frequency (50 Hz). MAX selects the
maximum line reference frequency (60 Hz).
• The line reference frequency is set to 60 Hz at the factory. The setting is stored in
non-volatile mainframe memory and is changed only when
CAL:LFR is executed.
• For a line frequency of 400 Hz, the 50 Hz reference frequency is used; however,
since 50 Hz is a subharmonic of 400 Hz, it provides normal mode rejection of
power line related noise.
• *RST Condition: The selected line reference frequency remains unchanged
since it is stored in non-volatile mainframe memory.
Example Selecting the Line Frequency Reference
CAL:LFR 50 !Reference frequency is 50 Hz.
:LFRequency?
CALibration:LFRequency? [MIN | MAX] returns one of the following numbers to
the output buffer:
• The present line reference frequency ("50" or "60") if MINimum or MAXimum is
not specified.
• The minimum line reference frequency ("50") if MIN is specified.
• The maximum line reference frequency ("60") if MAX is specified.
123 Command Reference Chapter 5