Keithley 2001 User Manual

IEEE-488 Reference
4-138
Query :DIGits? Query selected resolution
:DIGits? DEFault Query *RST default resolution
:DIGits? MINimum Query minimum allowable resolution
:DIGits? MAXimum Query maximum allowable resolution
Short-form formats: :curr:ac:dig? :curr[:dc]:dig?
:curr:ac:dig? xxx :curr[:dc]:dig? xxx
:volt:ac:dig? :volt[:dc]:dig?
:volt:ac:dig? xxx :volt[:dc]:dig? xxx
:res:dig? :fres:dig?
:res:dig? xxx :fres:dig? xxx
:freq:dig? :temp:dig?
:freq:dig? xxx :temp:dig? xxx
where; xxx = def, min or max
Description These commands are used to select display resolution for the specified measurement function.
Even though the parameters for this command are expressed as integers (4 to 8), you can specify
resolution using real numbers. For example, to select 3½ digit resolution let <n> = 3.5, for 4½d
let <n> = 4.5, and so on. Internally, the instrument rounds the entered parameter value to the
nearest integer. For example:
3.4 is rounded down to 3 (Illegal parameter)
3.5 is rounded up to 4
4.4 is rounded down to 4
4.5 is rounded up to 5
4.6 is rounded up to 5
Programming example 10 OUTPUT 716; “:curr:ac:dig 4.5; res?”
20 ENTER 716; A$
30 PRINT A$
40 END
Line 10 Sets ACI resolution to 4½d, and then queries the selected resolution.
Line 20 Addresses the Model 2001 to talk.
Line 30 Displays the selected resolution (5).
:AUTO <b>|ONCE
[:SENSe[1]]:CURRent:AC:DIGits:AUTO <b>|ONCE Control auto resolution for ACI
[:SENSe[1]]:CURRent[:DC]:DIGits:AUTO <b>|ONCE Control auto resolution for DCI
[:SENSe[1]]:VOLTage:AC:DIGits:AUTO <b>|ONCE Control auto resolution for ACV
[:SENSe[1]]:VOLTage[:DC]:DIGits:AUTO <b>|ONCE Control auto resolution for DCV
[:SENSe[1]]:RESistance:DIGits:AUTO <b>|ONCE Control auto resolution for Ω2
[:SENSe[1]]:FRESistance:DIGits:AUTO <b>|ONCE Control auto resolution for Ω4
[:SENSe[1]]:TEMPerature:DIGits:AUTO <b>|ONCE Control auto resolution for TEMP
Parameters <b> = 1 or ON Enable auto resolution
= 0 or OFF Disable auto resolution
ONCE Enable and then disable auto resolution

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