6482-901-01 Rev. A / August 2012
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12-5
Model 6482 Dual-Channel Picoammeter / Voltage Source Reference Manual
Section 12: Remote Operations
necting cable. See your controller's instruction manual for information about properly connect-
ing to the IEEE-488 bus.
NOTE
You can only have 15 devices connected to an IEEE-488 bus, including the controller.
The maximum cable length is either 20 meters (65.6 feet) or 2 meters (6.5 feet) multiplied
by the number of devices, whichever is less. Not observing these limits may cause erratic
bus operation.
Primary address
The Model 6482 ships from the factory with a GPIB primary address of 25. When the instrument
powers up, it momentarily displays the primary address. You can set the address to a value from 0
to 30, but do not assign the same address to another device or to a controller that is on the same
GPIB bus (controller addresses are usually 0 or 21).
The primary address can be checked or changed from the COMMUNICATIONS/GPIB option of
the main menu. See
This menu option also allows you to select the 488.1
or SCPI protocol (
).
General bus commands
General commands are those commands, such as DCL, that have the same general meaning
when used on any of the instrument.
lists the general bus commands.
REN (remote enable)
The remote enable command is sent to the Model 6482 by the controller to set up the instrument
for remote operation. Generally, the instrument should be placed in the remote mode before you
attempt to program it over the bus. Setting REN true does not place the instrument in the remote
state. You must address the instrument to listen after setting REN true before it goes into the
remote operation.
The Model 6482 must be in remote mode to use the following commands to trigger and acquire
readings:
•
:INITiate and then :FETCh?
•
:READ?
•
:MEASure?
Table 12-1
General bus commands
Command
Effect on Model 6482
REN
IFC
LLO
GTL
DCL
SDC
GET
SPE, SPD
Goes into remote operation when next addressed to listen.
Goes into talker and listener idle states.
LOCAL key locked out.
Cancel remote; restore Model 6482 front-panel operation.
Returns all devices to known conditions.
Returns Model 6482 to known conditions.
Initiates a trigger.
Serial polls the Model 6482.
Summary of Contents for 6482
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