Keithley 6517A User Manual

IEEE-488 Reference
3-111
Questionable Event Register:
Bit B0, Volts Summary (Volt) — Set bit indicates that an invalid volts measurement has oc-
curred (PTR), or a subsequent valid volts measurement has occurred (NTR).
Bit B1, Amps Summary (Amp) — Set bit indicates that an invalid amps measurement has oc-
curred, or a subsequent valid amps measurement has occurred (NTR).
Bits B2 and B3 — Not used.
Bit B4, Temperature Summary (Temp) — Set bit indicates that an invalid external tempera-
ture measurement has occurred (PTR), or a subsequent valid temperature measurement has oc-
curred (NTR).
Bit 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 (PTR). The instrument will instead use a default calibra-
tion constant. This error will clear after successful calibration of the instrument.
Bits B9, Humidity Summary (Hum) — Set bit indicates that an invalid relative humidity mea-
surement has occurred (PTR), or a subsequent valid temperature measurement has occurred
(NTR).
Bits B10, Ohms Summary (Ohm) — Set bit indicates that an invalid ohms measurement has
occurred (PTR), or a subsequent valid ohms measurement has occurred (NTR).
Bits B11, Coulombs Summary (Coul) — Set bit indicates that an invalid Coulombs measure-
ment has occurred, or a subsequent valid coulombs measurement has occurred (NTR).
Bits B12, Sequence Test Summary (Seq) — Set bit indicates that a sequence test has been
aborted (PTR).
Bits B13 — Not used.
Bit B14, Command Warning (Warn) — Set bit indicates that a Signal Oriented Measurement
Command parameter has been ignored (PTR), or a subsequent Signal Oriented Measurement
Command has executed successfully (NTR).
Bit B15 — Always zero.
Note: Whenever a questionable event occurs, the ERR annunciator will turn on. The annunciator
will turn off when the questionable event clears.
Figure 3-23
Questionable Event Register
RAV
B10 B9 B8 B7 B6 B5 B4 B3 B2 B1 B0
(2 )
9
(2 )
8
(2 )
7
(2 )
5
(2 )
4
(2 )
1
(2 )
0
32
0/1
Bit Position
Event
Decimal Weighting
Value
Value : 1 = Questionable Event Bit Set
0 = Questionable Event Bit Cleared
Amp
2
0/1
Events : Warn = Command Warning Cal = Calibration Summary
Seq = Sequence Test Summary Temp = Temperature Summary
Coul = Coulombs Summary Amp = Amps Summary
Hum = Humidity Summary Volt = Volts Summary
Hum Temp Volt
512 16 1
0/1 0/1 0/1
Cal BAV
256 128
0/1 0/1
Coul
B11
(2 )
11
2048
0/1
B14 B13 B12
0/1
4096
0/1
B15
(2 )
12
Warn Seq RUF
16384
(2 )
14
(2 )
6
256
0/1
0

Keithley 6517A Specifications

General

Brand	Keithley
Model	6517A
Category	Measuring Instruments
Language	English