Fluke 1504 7.3 Remote Commands

The IEEE-488 busrequires that each device has a unique address. The default

address of the1504 is 22 but can be changed if necessary. The IEEE-488 ad-

dress of the 1504 is setwithin the Comm menu after the serial linefeed param-

eter.(This menu option will not appear if the IEEE-488 interface is not

installed). Press the Menu button (“SEt?” appears) then press the Comm but-

ton. The displaywill briefly indicate “SErIAL”, then “bAUd” and then display

the currentbaud rate.Press Enter severaltimes until “IEEE”appears.Thedis

play willbriefly indicate “AddreSS” and then display the current IEEE-488

address. Use the Uand Dbuttonsto change the number then press Enter.

The 1504 willnormally terminate transmissions from the IEEE-488 port with a

linefeed (newline)character. Some systems may require a terminating carriage

return instead. The termination character can bechanged if necessary. The ter-

mination character is set within the Comm menu after the IEEE-488 address

parameter.(This menu option will not appear if the IEEE-488 interface is not

installed).The display will briefly indicate “EOS” (end of string) and then dis-

play the currentsetting. Use the Uand Dbuttons to change th e termination

character then press Enter.

Measurement data read from the GPIB interfacecan be stamped with the

time-of-day.For instructions on setting the time stamp and system clock see

Section7.1.3a bove.

7.3 Remote Commands

ASCII commandsare used to instruct the 1504 to perform certain actions. Ta -

ble5 providesa complete list of commands. These commands can be used with

either the RS-232 or IEEE-488 interface.All commands sent to the 1504 must

be terminatedwith a carriage return or linefeed. Either upper or lower case let-

ters are accepted. Commands used to set a parameter are issued with the com-

mand header,an “=“ character, and the parameter value. For example,

U=C<EOS> sets the units to Celsius. (The symbol <EOS> represents the termi-

nation character.)Commands used to request data are issued with only the

command header.For example, T<EOS> causes the 1502A to return the most

recent measurement. Basic operations using commands are explainedin the fol-

lowingsub-sections.

The following commands relate to reading measurement data.

1504 Thermometer Readout

User’s Guide