Fluke 8845A Programmer's Manual page 17

=> No errors were detected and the command was successfully parsed and
executed.
?> A Command Error was detected. The command was not executed because it
was not understood. For instance, this prompt would be returned if the Meter
was sent an input string that contained a syntax error.
!> An Execution Error was detected. The command was understood but not
executed (i.e., a device-dependent error). For instance, this prompt would be
returned if you attempted to use the decibels modifier (dB) on a frequency
measurement (FREQ).
^C (CNTRL C) is the RS-232 equivalent of IEEE-488 DCI (device clear),
causing "=>" followed by a carriage return and line feed to be output.
Terminations for the end of line can be set to carriage return (CR), line feed (LF), or both
(CRLF). Terminations for the end of line can be set in the <Instr SETUP><PORT
IF><RS232C> selection.
To change the Meter into Fluke 45 Emulation Mode, setup the remote interface for
RS232 or IEEE488 (Fluke 45 mode will not work over Ethernet):
For RS232
1. Press I
2. Press PORT IF softkey.
3. Press the SELECT PORT softkey.
4. Press the RS-232 softkey.
Set the baud rate to 9600 as follows:
1. Press I
2. Press PORT IF softkey.
3. Press the RS-232 softkey.
4. Press the BAUD RATE softkey.
5. Press the 9600 softkey.
Set the RS232 port to non-echo as follows:
1. Press I
2. Press PORT IF softkey.
3. Press the RS-232 softkey.
4. Press the COMP/TERM ECHO
5. Press the NO ECHO softkey.
For IEEE488
1. Press I
2. Press PORT IF softkey.
3. Press the SELECT PORT softkey.
4. Press the IEEE-488 softkey.
Set the IEEE488 address to a system compatible value as follows:
Note
Digital Multimeter
Configuring the RS-232 Port
9