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Keithley 6485 User Manual

Keithley 6485
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Model 6485 Picoammeter Instruction Manual Status Structure 10-17
Event enable registers
As Figure 10-1 shows, each status register set has an enable register. Each event register
bit is logically ANDed (&) to a corresponding enable bit of an enable register. Therefore,
when an event bit is set and the corresponding enable bit is set (as programmed by the
user), the output (summary) of the register will set to 1, which in turn sets the summary bit
of the status byte register.
The commands to program and read the event enable registers are listed in Table 10-6. For
details on programming and reading registers, see Programming enable registers,
page 10-5 and Reading registers, page 10-6.
NOTE The bits of any enable register can be reset to 0 by sending the 0 parameter
value with the appropriate enable command (i.e. STATus:OPERation:ENABle
0).
Table 10-6
Common and SCPI commands — event enable registers
Command Description
*ESE <NDN> or <NRf>
*ESE?
STATus
:OPERation
:ENABle <NDN> or <NRf>
:ENABle?
:MEASurement
:ENABle <NDN> or <NRf>
:ENABle?
:QUEStionable
:ENABle <NDN> or <NRf>
:ENABle?
Program standard event enable register (see Parameters).
Read standard event enable register.
STATus subsystem:
Operation event enable register:
Program enable register (see Parameters).
Read enable register.
Measurement event enable register:
Program enable register (see Parameters).
Read enable register.
Questionable event enable register:
Program enable register (see Parameters).
Read measurement event enable register:
Parameters:
<NDN> = #Bxxx Binary format (each x = 1 or 0)
= #Hx Hexadecimal format (x = 0 to FFFF)
= #Qx Octal format (x = 0 to 177777)
<NRf> = 0 to 65535 Decimal format
Note: Power-up and STATus:PRESet resets all bits of all enable registers to 0. *CLS has no effect.

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Keithley 6485 Specifications

General IconGeneral
ModelKeithley 6485
CategoryPicoammeter
Input Impedance>10^14 Ohms
Voltage Burden<200µV
Accuracy0.4% of reading
Voltage Source RangeNot Applicable
Voltage Source ResolutionNot Applicable
Voltage Source AccuracyNot Applicable
InterfaceIEEE-488
Power Requirements100V to 240V AC, 50/60Hz
Dimensions89 mm high x 214 mm wide x 369 mm deep (3.5 in x 8.4 in x 14.5 in)

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