Keithley 2461 Reference Manual

Appendix
B: Common commands Model 2461 Interactive SourceMeter® Instrument
Reference Manual
B-8 2461-901-01 A/November 2015
*SRE
This command sets or clears the bits of the Service Request Enable Register.
Type Affected by Where saved Default value
Command and query
:STATus:PRESet
status.preset()
Not applicable 0
Usage
*SRE <n>
*SRE?
<n>
Clear the Status Request Enable Register: 0
Set the instrument for an SRQ interrupt: 32
Details
This command sets or clears the individual bits of the Status Request Enable Register.
The Status Request Enable Register is cleared when power is cycled or when a parameter value of 0
is sent with this command.
The instrument returns a decimal value that corresponds to the binary-weighted sum of all bits set in
the register.
Bit
Decimal
value
Constants When set, indicates the following has occurred:
0
1
status.MSB
An enabled event in the Measurement Event Register has
occurred.
1
2
Not used
Not used.
2
4
status.EAV
An error or status message is present in the Error Queue.
3 8
status.QSB
An enabled event in the Questionable Status Register has
occurred.
4
16
status.MAV
A response message is present in the Output Queue.
5
32
status.ESB
An enabled event in the Standard Event Status Register
has occurred.
6 64 Not used Not used.
7
128
status.OSB
An enabled event in the Operation Status Register has
occurred.
Constants are only available if you are using the TSP command set. If you are using the SCPI
command set, you must use the decimal values.
Example
*SRE 0
Clear the bits of the Status Request Enable Register.
Also see
Understanding bit settings (on page C-16)

Keithley 2461 Specifications

General

Maximum Current	7 A
Power	100 W
Resolution	6.5 digits
Source Measure Unit (SMU)	Yes
DC Voltage	100 V
Maximum Voltage	100 V
Display	5-inch capacitive touchscreen
Connectivity	USB, GPIB
Software	TSP
DC Current	7 A
Current Source Range	0 to 7 A
Voltage Measurement Range	100 mV to 100 V
Current Measurement Range	10 nA to 7 A
Voltage Measurement Resolution	100 nV