Keithley 6517B Reference Manual

Section 14: SCPI command reference Model 6517B Electrometer Reference Manual
14-2 6517B-901-01 Rev. C / August 2015
:FETCh?
This command requests the latest post-processed reading.
Usage
FETCh?
Details
This query command requests the latest post-processed reading. After sending this command and
addressing the Model 6517B to talk, the reading is sent to the computer. This command does not
affect the instrument setup.
This command does not trigger a measurement. It simply requests the last available reading. Note
that this command can repeatedly return the same reading. In the absence of a new reading, this
command returns the old reading. If your application requires fresh readings, use the :DATA:FRESh?
command.
This command is automatically asserted when the :READ? or :MEASure? command is sent.
Also see
:DATA:FRESh? (on page 14-36)

Keithley 6517B Specifications

General

Input Impedance	>200 TΩ
Electrometer Type	Electrometer/High Resistance Meter
Current Measurement Range	20 fA to 20 mA
Display	Vacuum Fluorescent Display
Communication Interfaces	IEEE-488 (GPIB), RS-232
Power Supply	100 V / 120 V / 220 V / 240 V; 50 Hz / 60 Hz
Resistance Measurement Range	Up to 200 TΩ