Measurement Considerations; Remote Command Programming - Keithley 6514 Quick Manual

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8
Model 6514 Quick Results Guide

Measurement considerations

For sensitive measurements, keep these points in mind to maximize measurement
accuracy:

Remote command programming

Data string
The :READ? command is typically used to trigger a reading and request the data string.
The data string is sent to the computer when the Model 6514 is addressed to talk. The data
string can be made of up to three elements separated by commas. The first element is the
voltage, current, resistance, or charge reading, the second is the timestamp, and the third is
status. A three-element data string is the default condition. See Section 16, FORMat
subsystem, of the Model 6514 Instruction Manual for details on all aspects of the data
format.
Command characters
Commands characters enclosed in brackets [] are optional and are not required. Do not
include the brackets when programming the Model 6514. Portions of commands in upper-
case indicate the command short form; lower-case command characters are optional and
need not be included in the command string. See Section 12 of the Model 6514 Instruction
Manual for more information on programming syntax.
Use only low noise triax cable for input connections.
Use zero correct with zero check enabled to null internal offsets.
Keep the Model 6514 and test circuit away from electrical noise sources, and shield
if necessary.

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