Zero - Fluke 8588A Operator's Manual

Table 18 shows the Product Trig Out remote commands compared to the
HP/Agilent/Keysight 3458A EXTOUT commands.
Table 18. Trig Out Remote Commands compared to the HP/Agilent/Keysight 3458A EXTOUT
8558A/8588A Trig Out
OFF
Signal Acquired (ACO)
Once
Aperture open (APE)
Multiple readings complete (BCO)
On Event
Reading complete (RCO)
Not implemented

Zero

The Zero operation removes unwanted residual offsets in a given function and
range. These residual offsets are from either the Product, or from the connection
leads being used. Some specifications require the use of Zero or the Math Null
function under certain environmental conditions. See Specifications.
Zero is used when ambient temperature or input lead configurations change and
cause an offset from thermal emfs. Zero can also be used if you want the display
to read zero with a zero input and it does not due to small shifts within the
Product. (An exception is in ACV and ACI. See Use the Zero Operation.) Zero
works in all functions except PRT, RF Power, and Frequency Counter, or if a
Scan operation is selected.
Zero is retained after Instrument Reset ( > Reset Instrument), but
removed after power-off.
Math Null, accessed with , is a user-selected entry value that uses either
the numeric keypad or the  (Last Reading) softkey. Math Null is similar to
Zero, but it typically is used to offset readings based on other factors besides
thermal emfs or lead connections. For example, a calibrator source may have an
offset voltage of 10 mV, which can be entered as the "c" value in the Math
function. Subsequent measurements of the calibrator source will have the 10 mV
offset removed. Math Null is set to Off after an Instrument Reset ( >
Reset Instrument) or after power-off, and the null value is set to its default.
The Zero operation works up to 1 % of range, for example 100 mV on the 10 V
range. In 2 wire ohms, the limit is 1 % of range + 0.5 ohm; and in capacitance,
the limit is 1 % of range + 200 pF.
Reference Multimeter and 8 ½ Digit Multimeter
Commands
3458A EXTOUT
OFF
ICOMP
ONCE
APER
BCOMP
No equivalent
RCOMP
SRQ
Features
83