Model 6485 Picoammeter Instruction Manual Status Structure 10-15
Questionable event status
The used bits of the questionable event register (Figure 10-7) are described as follows:
• Bit B7, calibration summary (Cal) — Set bit indicates that an invalid calibration
constant was detected during the power-up sequence. This error will clear after
successful calibration of Model 6485.
• Bit B14, command warning (Warn) — Set bit indicates that a signal oriented measure-
ment command parameter has been ignored.
Figure 10-7
Questionable event status
Condition registers
As Figure 10-1 shows, each status register set (except the standard event register set) has a
condition register. A condition register is a real-time, read-only register that constantly
updates to reflect the present operating conditions of the instrument. For example, while
Model 6485 is in the idle state, bit B10 (Idle) of the operation condition register will be
set. When the instrument is taken out of idle, bit B10 clears.
OR
Warn = Command Warning
Cal = Calibration Summary
& = Logical AND
OR = Logical OR
&
&
16384
(2
14
)
Decimal
Weights
[:EVENt]?
128
(2
7
)
(B6-B0)
Cal
(B7)
Warn
(B14) (B13-B8)
(B15)
:CONDition?
Cal
(B7)
Warn
(B14) (B13-B8)
(B15)
Questionable
Condition Register
:ENABle <NRf>
:ENABle?
(B6-B0)
Questionable
Event Register
Warn
(B14) (B13-B8)
(B15)
(B6-B0)
Questionable Event
Enable Register
Cal
(B7)
To QSB bit
of Status Byte
Register
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