Keithley 2001 User Manual

IEEE-488 Reference
4-129
Query :RANGe[:UPPer]? Query ACI measurement range
:RANGe[:UPPer]? DEFault Query *RST default range
:RANGe[:UPPer]? MINimum Query lowest measurement range
:RANGe[:UPPer]? MAXimum Query highest measurement range
Short-form formats: :curr:ac:rang? :curr[:dc]:rang?
:curr:ac:rang? xxx :curr[:dc]:rang? xxx
:volt:ac:rang? :volt[:dc]:rang?
:volt:ac:rang? xxx :volt[:dc]:rang? xxx
:res:rang? :fres:rang?
:res:rang? xxx :fres:rang? xxx
where; xxx = def, min or max
Response message: 0 to 1050000000
Description This command is used to manually select the measurement range for the specifed measurement
function. The range is selected by specifying the expected reading as an aboslute value. The
Model 2001 will then go to the most sensitive range that will accommodate that expected read-
ing. For example, if you expect a reading of approximately 100mA, simply let the parameter
(<n>) = 0.1 (or 100e-3) in order to select the 200mA range.
Programming example 10 OUTPUT 716; “:curr:ac:rang 125e-6; rang?”
20 ENTER 716; A$
30 PRINT A$
40 END
Line 10 Specifies the expected reading to be 125µA AC, and then queries the selected mea-
surement range.
Line 20 Addresses the Model 2001 to talk.
Line 30 Displays the currently selected measurement range (0.0002).
:AUTO <b>|ONCE
[:SENSe[1]]:CURRent:AC:RANGe:AUTO <b>|ONCE Control auto range for ACI
[:SENSe[1]]:CURRent[:DC]:RANGe:AUTO <b>|ONCE Control auto range for DCI
[:SENSe[1]]:VOLTage:AC:RANGe:AUTO <b>|ONCE Control auto range for ACV
[:SENSe[1]]:VOLTage[:DC]:RANGe:AUTO <b>|ONCE Control auto range for DCV
[:SENSe[1]]:RESistance:RANGe:AUTO <b>|ONCE Control auto range for Ω2
[:SENSe[1]]:FRESistance:RANGe:AUTO <b>|ONCE Control auto range for Ω4
Parameters <b> = 1 or ON Enable auto range
= 0 or OFF Disable auto range
ONCE Enable and then disable auto range
Formats :curr:ac:rang:auto <b> :curr[:dc]:rang:auto <b>
:curr:ac:rang:auto ONCE :curr[:dc]:rang:auto ONCE
:volt:ac:rang:auto <b> :volt[:dc]:rang:auto <b>
:volt:ac:rang:auto ONCE :volt[:dc]:rang:auto ONCE
:res:rang:auto <b> :fres:rang:auto <b>
:res:rang:auto ONCE :fres:rang:auto ONCE

Keithley 2001 Specifications

General

Model	2001
Category	Multimeter
Manufacturer	Keithley
Type	Digital Multimeter
Digits of Resolution	7.5
DC Voltage Range	100 mV to 1000 V
AC Voltage Range	100 mV to 750 V
Frequency Range	3 Hz to 500 kHz
Connectivity	GPIB, RS-232
Display	VFD
Resistance Accuracy	0.008% + 2.0 mΩ
Frequency Accuracy	±0.01%
DC Current Range	10 μA to 3 A
AC Current Range	10 μA to 3 A
Power Supply	100 V to 240 V AC, 45 Hz to 66 Hz