Keithley 2750 User Manual

Limits .............................................................................................. 9-16
Digital outputs ................................................................................. 9-18
10 Remote Operations
Operation enhancements ........................................................................ 10-2
Pseudocards ..................................................................................... 10-2
Autozero .......................................................................................... 10-2
dB calculation .................................................................................. 10-2
Separate function setups .................................................................. 10-3
DCV input divider ........................................................................... 10-3
Multiple channel operation .............................................................. 10-3
GPIB setup .............................................................................................. 10-4
GPIB standards ................................................................................ 10-4
Selecting GPIB and setting primary address ................................... 10-4
GPIB connections ............................................................................ 10-5
General bus commands ........................................................................... 10-7
REN (remote enable) ....................................................................... 10-8
IFC (interface clear) ........................................................................ 10-8
LLO (local lockout) ......................................................................... 10-8
GTL (go to local) ............................................................................. 10-8
DCL (device clear) .......................................................................... 10-9
SDC (selective device clear) ........................................................... 10-9
GET (group execute trigger) ........................................................... 10-9
SPE, SPD (serial polling) ................................................................ 10-9
Front panel GPIB operation .................................................................. 10-10
Error and status messages ............................................................. 10-10
GPIB status indicators ................................................................... 10-10
LOCAL key ................................................................................... 10-11
Programming syntax ............................................................................. 10-11
Command words ........................................................................... 10-11
Query commands ........................................................................... 10-13
Case sensitivity .............................................................................. 10-13
Long-form and short-form versions .............................................. 10-14
Short-form rules ............................................................................ 10-14
Program messages ......................................................................... 10-15
Response messages ....................................................................... 10-17
Message exchange protocol .......................................................... 10-17
RS-232 interface operation ................................................................... 10-18
Sending and receiving data ............................................................ 10-18
Baud rate ....................................................................................... 10-18
Signal handshaking (flow control) ................................................ 10-19
Terminator ..................................................................................... 10-19
Selecting and configuring RS-232 interface ................................. 10-20
RS-232 connections ....................................................................... 10-20
2750-900-01.book Page 6 Wednesday, August 3, 2011 7:56 AM

Keithley 2750 Specifications

General

Interface	GPIB, RS-232, Ethernet
Switching Speed	Up to 500 channels/second
Maximum Voltage	300V
Operating Temperature	0°C to 50°C
Measurement Functions	DCV, ACV, DCI, ACI, 2-wire Resistance, 4-wire Resistance, Frequency, Temperature
Resolution	6.5 digits
Current	1A
Maximum Current	1A