Keithley 2700, User Manual, Page: 326 / 500

Model 2700 Multimeter/Switch System User’s Manual Status Structure 11-15
Measurement event register
The used bits of the Measurement Event Register ( Figure 11-6 ) are described as follows:
•
Bit B0, Reading Overflow (ROF)
— Set bit indicates that the reading exceeds the
measurement range of the instrument.
•
Bit B1, Low Limit 1 Event (LL1)
— Set bit indicates that a reading has reached or
exceeded Low Limit 1.
•
Bit B2, High Limit 1 Event (HL1)
— Set bit indicates that a reading has reached
or exceeded High Limit 1.
•
Bit B3, Low Limit 2 Event (LL2)
— Set bit indicates that a reading has reached or
exceeded Low Limit 2.
•
Bit B4, High Limit 2 Fail (HL2)
— Set bit indicates that a reading has reached or
exceeded High Limit 2.
•
Bit B5, Reading Available (RAV)
— Set bit indicates that a reading was taken and
processed.
NOTE
A programming example to read the RAV bit is provided in “ Example 2 – Read
RAV bit of measurement event register ” on page 11-20 .
•
Bit B6, Buffer Notify (BN)
— Set bit is a notification that the user-specified
number of readings have been stored in the buffer. The TRACe:NOTify command
specifies the number of stored readings that will set this bit (see
Section 6 for
details).
•
Bit B7, Buffer Available (BAV)
— Set bit indicates that there are at least two
readings in the buffer.
•
Bit B8, Buffer Half Full (BHF)
— Set bit indicates that the trace buffer is half
full.
•
Bit B9, Buffer Full (BF)
— Set bit indicates that the trace buffer is full.
NOTE
A programming example to read the BHF bit is provided in “ Example 3 – Read
BHF bit of measurement event register ” on page 11-21 .
•
Bit B10, Buffer Overflow (BOF)
— Set bit indicates that the filled buffer has
wrapped and written over previously stored readings.
•
Bit B11, Hardware Limit Event (HL)
— Set bit indicates that a reading has
exceeded the hardware limit.
•
Bit B12, Buffer Quarter Full (BQF)
— Set bit indicates that the trace buffer is
one-quarter full.
NOTE
Bits B12 ( G full) and B13 ( I full) are not intended to be used with buffer sizes
smaller than four readings.