Appendix E: Status model
Model 2651A High Power System SourceMeter® Instrument Reference Manual
E-12
2651A-901-01 Rev. A / March 2011
Figure 137: Questionable status registers
0
6
5
3
4
2
1
7
14
13
12
11
10
9
8
15
Questionable Status Register
(questionable/QSR)
+
Instrument Summary (INST)
0
6
5
3
4
2
1
7
14
13
12
11
10
9
8
15
Questionable Status
Calibration Summary
Register
+
SMU A (SMUA)
0
6
5
3
4
2
1
7
14
13
12
11
10
9
8
15
Questionable Status
Instrument Summary
Register
+
SMU A (SMUA)
To Questionable
Summary Bit (QSB) in
Status Byte (STB)
0
6
5
3
4
2
1
7
14
13
12
11
10
9
8
15
Questionable Status
SMU A Summary
Register
+
Calibration (CAL)
Similar registers
exists for Over
Temperature and
Unstable Output
Calibration (CAL)
Over Temperature (OTEMP)
Over Temperature (OTEMP)
status.questionable.instrument.smua
status.questionable.calibration
status.questionable.instrument
status.questionable
(status.questionable.over_temperature)
Unstable Output (UO)
(status.questionable.unstable_output)
Unstable Output (UO)
Clearing registers and queues
Commands to reset the status registers and the error queue are listed in the table below. In addition
to these commands, any programmable register can be reset by sending the individual command to
program the register with a 0 as its parameter value.
Commands to reset registers and clear queues
Commands Description
To reset registers:
*CLS
Clears the output queue. Reset bits of status
registers to 0.
status.reset()
Reset bits of status registers to 0.
To clear error queue:
errorqueue.clear()
Clear all messages from error queue.
The instrument automatically clears the output queue when the instrument transitions from the local
control state to the remote control state.
