Keithley 2750 User Manual

Model 2750 Multimeter/Switch System User’s Manual Status Structure 11-11
Status register sets
As shown in Figure 11-1, there are four status register sets in the status structure of the
Model 2750: Standard Event Status, Operation Event Status, Measurement Event Status,
and Questionable Event Status.
Register bit descriptions
Standard event register
The used bits of the Standard Event Register (Figure 11-4) are described as follows:
• Bit B0, Operation Complete (OPC) — Set bit indicates that all pending selected
device operations are completed and the Model 2750 is ready to accept new com-
mands. This bit only sets in response to the *OPC? query command. See
Section 12 for details on *OPC and *OPC?.
Figure 11-4
Standard event status
* ESR ?
PON
(B7)
URQ
(B6)
CME
(B5)
EXE
(B4)
DDE
(B3)
QYE
(B2) (B1) (B0)
OR
Standard Event
Status Register
Standard Event
Status Enable
Register
PON = Power On
URQ = User Request
CME = Command Error
EXE = Execution Error
DDE = Device-Dependent Error
OPC
PON
(B7)
URQ
(B6)
CME
(B5)
EXE
(B4)
DDE
(B3)
QYE
(B2) (B1) (B0)
OPC
* ESE
* ESE ?
(B15 - B8)
(B15 - B8)
To Event
Summary
Bit (ESB) of
Status Byte
Register.
&
&
&
&
&
&
&
QYE = Query Error
OPC = Operation Complete
& = Logical AND
OR = Logical OR
2750-900-01.book Page 11 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