Compare Commands And Queries; Trigger Configuration Commands - Fluke 45 User Manual

Compare Commands and Queries

The commands in Table 5-15 cause the meter to determine whether a measurement is
higher than, lower than, or within a specified range. These commands correspond to the
COMP, HI, and LO buttons on the front panel.
Command
COMP Meter enters compare (COMP) function. Touch Hold is automatically turned on.
(Touch Hold can be turned off with "HOLDCLR" command.)
COMP? Meter returns "Hl" if the last COMP measurement reading was above the compare
range, "LO" if it was below it, "PASS" if within compare range, or "—" if a
measurement has not completed.
COMPCLR Meter exits compare function (and Touch Hold if it is selected), and restores display to
normal operation.
COMPHI Sets "HI" compare (COMP) value to <high value>. <high value> can be a signed
<high value> integer, signed real number without exponent, or signed real number with exponent.
COMPLO Sets "LO" compare (COMP) value to <low value>. <low value> can be a signed
<low value> integer, signed real number without exponent, or signed real number with exponent.
HOLDCLR Meter exits Touch Hold and restores display to normal operation, but does not exit the
compare function.

Trigger Configuration Commands

The commands in Table 5-16 set and return the trigger configuration.
Command
TRIGGER Sets the trigger configuration to <type>.
<type>
<type> corresponds to a number between 1 and 5 selected from Table 5-15A. If the
<type> entered is not one of these numbers, an Execution Error is generated.
Select a trigger type with the settling delay (type 3 or 5) enabled when the input signal
is not stable before a measurement is triggered. Typical settling delays are provided
in Table 4-4.
TRIGGER?
Returns the trigger <type> set by the TRIGGER command.
Table 5-15. Compare Commands and Queries
Table 5-16. Trigger Configuration Commands
Table 5-15A. Trigger Type
Type Trigger
1 Internal
2 External
3 External
4 External
5 External
Operating the Meter Using the Computer Interface
Computer Interface Command Set
Description
Description
Rear Trigger
Disabled
Disabled
Disabled
Enabled
Enabled
Settling Delay
Off
On
Off
On
5
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