Keithley 2002 User Manual

IEEE-488 Reference
3-99
:REFerence <n>
[:SENSe[1]]:CURRent:AC:REFerence <n> Specify reference for ACI
[:SENSe[1]]:CURRent:DC:REFerence <n> Specify reference for DCI
[:SENSe[1]]:VOLTage:AC:REFerence <n> Specify reference for ACV
[:SENSe[1]]:VOLTage:DC:REFerence <n> Specify reference for DCV
[:SENSe[1]]:RESistance:REFerence <n> Specify reference for Ω2
[:SENSe[1]]:FRESistance:REFerence <n> Specify reference for Ω4
[:SENSe[1]]:FREQuency:REFerence <n> Specify reference for FREQ
[:SENSe[1]]:TEMPerature:REFerence <n> Specify reference for TEMP
<n> = -2.1 to +2.1 Reference for ACI and DCI
-1100 to +1100 Reference for DCV and ACV
0 to 1.05e9 Reference for Ω2
0 to 2.1e6 Reference for Ω4
0 to 1.5e7 Reference for FREQ
-328 to +3310 Reference for TEMP (°F)
-200 to +1821 Reference for TEMP (°C)
73 to 2094 Reference for TEMP (K)
DEFault 0 (All functions)
MINimum Minimum value for specified function
MAXimum Maximum value for specified function
:REFerence? Query programmed reference value
:REFerence? DEFault Query *RST default reference value
:REFerence? MINimum Query lowest allowable reference value
:REFerence? MAXimum Query largest allowable reference value
These commands are used to establish a reference value for the specified function. When Ref-
erence is enabled (see :REFerence:STATe), the result will be the algebraic difference between
the input signal and the reference value:
Reading = Input signal - Reference
From the front panel, reference is called relative (REL). See paragraph 2.6 for more information
on REL.
The :REFerence <n> command is coupled to the :ACQuire command. The last command sent
(:REFerence <n> or :ACQuire) establishes the reference. When a reference is set using the
:REFerence <n> command, the :REFerence? query command returns the programmed value.
Conversely, when a reference is set using the :ACQuire command, the :REFerence? query com-
mand returns the acquired reference value.
PRINT #1, "output 16; :curr:ac:ref 1; ref?" ' Set reference to 1A
PRINT #1, "enter 16" ' Get response from 2002
3.18.9
Parameters
Query
Description
Program fragment

Keithley 2002 Specifications

General

Resolution	8.5 digits
DC Voltage Accuracy	±0.0006%
Maximum DC Voltage	1000 V
Maximum AC Voltage	750 V
Maximum DC Current	3 A
Maximum AC Current	3 A
Connectivity	GPIB, RS-232
DC Voltage Range	100 mV to 1000 V
AC Voltage Range	100 mV to 750 V
Resistance Range	10 Ω to 1 GΩ
Model	2002
Category	Multimeter
Interface	GPIB, RS-232
AC Current Accuracy	±0.1%
Frequency Range	0.1Hz to 300kHz
Display	VFD
Type	Digital
Power Supply	100-240V AC, 50/60Hz
Current Range (DC)	100 μA to 3 A
Current Accuracy (DC)	±0.01%
Current Range (AC)	100 μA to 3 A
Current Accuracy (AC)	±0.1%
DC Current Range	100 μA to 3 A
AC Current Range	100 μA to 3 A