Keithley 2701

11-16 Status Structure Model 2701 User’s Manual
Questionable event register
The used bits of the Questionable Event Register (Figure 11-7) are described as follows:
• Bits B0 through B3 — Not used.
• Bit B4, Temperature Summary (Temp) — Set bit indicates that an invalid refer-
ence junction measurement has occurred for thermocouple temperature
measurements.
• Bits B5, B6, and B7 — Not used.
• Bit B8, Calibration Summary (Cal) — Set bit indicates that an invalid calibration
constant was detected during the power-up sequence. The instrument will instead
use a default calibration constant. This error will clear after successful calibration
of the instrument.
• Bits B9 through B13 — Not used.
• Bit B14, Command Warning (Warn) — Set bit indicates that a Signal Oriented
Measurement Command parameter has been ignored.
• Bit B15 — Not used.
NOTE Whenever a questionable event occurs, the ERR annunciator will turn on. The
annunciator will turn off when the questionable event clears.