- 24 -
This reporting system follows the style of SCPI, and the unused bits are allocated to
other functions which allow for expansion and compatibility with other SCPI compliant
devices.
Questionable Data Registers
Temperature Range (bit 4)
This bit is set when the last measurem ent resulted in a temperature measurement
error (eg. out of range).
Resistance (bit 9)
This bit is set when the last measurem ent resulted in a resistance measurement
error (eg. over-range, polarity error, excess resistance in current leads).
Below Low er Limit (bit 11)
This bit is set when the limits facility is on, and the last measurement was less
than the lower limit.
Above Upper Limit (bit 12)
This bit is set when the limits facility is on, and the last measurement was greater
than the upper limit.
The following commands are used to access these registers;
STATus:QUEStionable:CONDition?
Query the Questionable Data Condition Register. The instrument returns a binary-
weighted decimal value representing the bits set in the condition register.
STATus:QUEStionable:EVENt?
Query the Questionable Data Event Register. The instrument returns a binary-
weighted decimal value representing the bits set in the event register, and clears
it.
STATus:QUEStionable:ENABle <
enable value
>
Enable bits in the Questionable Data Enable Register. The selected bits are then
reported to the Status Byte.
STATus:QUEStionable:ENABle?
Query the Questionable Data Enable Register. The instrument returns a binary-
weighted decimal value representing the bits set in the enable register.
Standard Event Registers
Operation Complete (bit 0)
This bit is set in response to the *OPC command. It indicates that the instrument
has completed all pending operations.
This works for IEEE only - the bit is indeterminate for RS-232.
Query Error (bit 2)
This bit is set when either an attemp t has been made to read data from the output
queue when no data is present or pending, or data in the queue has been lost.
This works for IEEE only - the bit is indeterminate for RS-232.
Execution Error (bit 4)
This bit is set when a valid command has been received and recognised, but
could not be executed at the time. This could be either an out-of-context
command or an out of range parameter. The command is ignored.
