set the bath and view or program the various parameters. The interface com-
mands are discussed in Section 10.3, Interface Commands. All commands are
ASCII character strings terminated with a carriage-return character (CR, ASCII
13).
10.2
IEEE-488 Communication (optional)
The IEEE-488 interface is available as an option. Baths supplied with this op-
tion may be connected to a GPIB type communication bus which allows many
instruments to be connected and controlled simultaneously. To eliminate noise,
the GPIB cable should be shielded.
10.2.1
Setup
To use the IEEE-488 interface connect an IEEE-488 standard cable to the back
of the bath, set the device address, and set the transmission termination
character.
To enter the IEEE-488 parameter programming menu press “EXIT” and “SET”
simultaneously and then release to enter the secondary menu. Press “SET” re-
peatedly until the display reaches “
PrObE
”. Press “UP” repeatedly until the
IEEE-488 interface menu is indicated with “
IEEE
”. Press “SET” to enter the
IEEE-488 parameter menu. The IEEE-488 menu contains the IEEE-488 ad-
dress parameter.
10.2.1.1
Address
The IEEE-488 address is prompted with “
AddrESS
”. Press “SET” to program
the address. The default address is 22. Change the device address of the bath if
necessary to match the address used by the communication equipment by
pressing “UP” or “DOWN” and then “SET”.
10.2.1.2
Transmission Termination
The IEEE-488 transmission termination is prompted with “EOS”. Press “SET”
to access the termination character. The present setting is displayed. Press “UP”
or “DOWN” to change the setting. Press “SET” to save the new selection.
10.2.2
Operation
Commands may now be sent via the IEEE-488 interface to read or set the tem-
perature or access other controller functions. All commands are ASCII charac-
ter strings and are terminated with a carriage-return (CR, ASCII 13). Interface
commands are listed below.
10.3
Interface Commands
The various commands for accessing the bath controller functions via the digi-
tal interfaces are listed in this section (see Table 5). These commands are used
59
10 Digital Communication Interface
IEEE-488 Communication (optional)
