Keithley 2601 Reference Manual page 354

Section 12: Instrument Control Library
status.questionable.*
status.questionable.condition
status.questionable.enable
status.questionable.event
status.questionable.ntr
status.questionable.ptr
* = condition, enable, event, ntr or ptr
Attribute Questionable event status register set.
Usage Reads condition, enable, event, NTR and PTR registers:
quesreg = status.questionable.condition
quesreg = status.questionable.enable
quesreg = status.questionable.event
quesreg = status.questionable.ntr
quesreg = status.questionable.ptr
Writes to enable, NTR and PTR registers:
status.questionable.enable = quesreg
status.questionable.ntr = quesreg
status.questionable.ptr = quesreg
Set quesreg to one of the following values:
0
status.questionable.CALIBRATING
status.questionable.CAL
status.questionable.UNSTABLE_OUTPUT
status.questionable.UO
status.questionable.OVER_TEMPERATURE
status.questionable.OTEMP
status.questionable.INSTRUMENT_SUMMARY
status.questionable.INST
quesreg
To set bit B8 (CAL), set
To set bit B9 (UO), set
To set bit B12 (OTEMP), set
To set bit B13 (INST), set
To set more than one bit of the register, set quesreg to the sum of their decimal weights.
For example, to set bits B8 and B12, set quesreg to 4352 (256 + 4096).
Remarks • This attribute is used to read or write to the questionable event registers.
• Reading a status register returns a value. The binary equivalent of the returned value
indicates which register bits are set. The least significant bit of the binary number is bit 0,
and the most significant bit is bit 15.
• For example, assume value 4352 is returned for the enable register. The binary equivalent
is 0001000100000000. This value indicates that bit B8 (CAL) and bit B12 (OTEMP) are
set.
• The used bits of the questionable event registers are described as follows:
Bit B8, CAL – Set bit indicates that calibration is questionable.
•
• Bit B9, UO
• Bit B12, OTEMP – Set bit indicates that an over temperature condition was detected.
• Bit B13, INST – Set bit indicates that a bit in the questionable instrument summary
register is set.
Details See "status.operation.user.condition =
Example Sets the OTEMP bit of the questionable enable register:
status.questionable.enable = status.questionable.OTEMP
12-94
can also be set to the decimal weight of the bit to be set. Examples:
to 256 (2
quesreg
to 512 (2^9).
quesreg
quesreg
quesreg
–
Set bit indicates that an unstable output condition was detected.
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Series 2600 System SourceMeter® Instruments Reference Manual
Clears all bits.
Sets CAL bit (B8).
Sets CAL bit (B8).
Sets UO bit (B9).
Sets UO bit (B9).
Sets OTEMP bit (B12).
Sets OTEMP bit (B12).
Sets INST bit (B13).
Sets INST bit (B13).
8
).
12
to 4096 (2 ).
13
to 8192 (2 ).
2" in Appendix D.
2600S-901-01 Rev. C / January 2008