Keithley 2600a series, Reference Manual, Page: 511 / 696

2600AS-901-01 Rev. B / September 2008 Return to Section Topics 19-189
Series 2600A System SourceMeter® Instruments Reference Manual Section 19: Remote Commands
status.questionable.condition
status.questionable.enable
status.questionable.event
status.questionable.ntr
status.questionable.ptr
Attribute Questionable status register set.
Default 0
TSP-Link
accessibility
This attribute can be accessed from a remote TSP-Link node.
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
Clears all bits.
status.questionable.CALIBRATION
Sets CAL bit (B8).
status.questionable.CAL
Sets CAL bit (B8).
status.questionable.UNSTABLE_OUTPUT
Sets UO bit (B9).
status.questionable.UO
Sets UO bit (B9).
status.questionable.OVER_TEMPERATURE
Sets OTEMP bit (B12).
status.questionable.OTEMP
Sets OTEMP bit (B12).
status.questionable.INSTRUMENT_SUMMARY
Sets INST bit (B13).
status.questionable.INST
Sets INST bit (B13).
quesreg
can also be set to the decimal weight of the bit to be set. Examples:
To set bit B8 (CAL), set
quesreg
to 256 (2
8
).
To set bit B9 (UO), set
quesreg
to 512 (2^9).
To set bit B12 (OTEMP), set
quesreg
to 4096 (2
12
).
To set bit B13 (INST), set
quesreg
to 8192 (2
13
).
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 • These attributes are used to read or write to the questionable status 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 status registers are described as follows:
• Bit B8, CAL : Set bit indicates that calibration is questionable.
• Bit B9, UO : Set bit indicates that an unstable output condition was detected.
• 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 status instrument
summary register is set.
Details See Questionable Status Register in Appendix C .
Example Sets the OTEMP bit of the questionable status enable register:
status.questionable.enable = status.questionable.OTEMP