Keithley 2002 User Manual

IEEE-488 Reference
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:STATe <b>
[:SENSe[1]]:CURRent:AC:REFerence:STATe <b> Control reference for ACI
[:SENSe[1]]:CURRent:DC:REFerence:STATe <b> Control reference for DCI
[:SENSe[1]]:VOLTage:AC:REFerence:STATe <b> Control reference for ACV
[:SENSe[1]]:VOLTage:DC:REFerence:STATe <b> Control reference for DCV
[:SENSe[1]]:RESistance:REFerence:STATe <b> Control reference for Ω2
[:SENSe[1]]:FRESistance:REFerence:STATe <b> Control reference for Ω4
[:SENSe[1]]:FREQuency:REFerence:STATe <b> Control reference for FREQ
[:SENSe[1]]:TEMPerature:REFerence:STATe <b> Control reference for TEMP
<b> = 1 or ON Enable reference
0 or OFF Disable reference
:STATe? Query state of reference
These commands are used to enable or disable Reference for the specified function. When
enabled, the displayed reading will include the programmed reference value (see :REFerence
<n> and :ACQuire). When disabled, the displayed reading will not include the reference value.
PRINT #1, "output 16; :curr:ac:ref:stat on; stat?" ' Enable reference
PRINT #1, "enter 16" ' Get response from 2002
:ACQuire
[:SENSe[1]]:CURRent:AC:REFerence:ACQuire Acquire Reference for ACI
[:SENSe[1]]:CURRent:DC:REFerence:ACQuire Acquire Reference for DCI
[:SENSe[1]]:VOLTage:AC:REFerence:ACQuire Acquire Reference for ACV
[:SENSe[1]]:VOLTage:DC:REFerence:ACQuire Acquire Reference for DCV
[:SENSe[1]]:RESistance:REFerence:ACQuire Acquire Reference for Ω2
[:SENSe[1]]:FRESistance:REFerence:ACQuire Acquire Reference for Ω4
[:SENSe[1]]:FREQuency:REFerence:ACQuire Acquire Reference for FREQ
[:SENSe[1]]:TEMPerature:REFerence:ACQuire Acquire Reference for TEMP
When one of these commands is sent, the measured input signal is acquired and established as
the reference value. This command is typically used to zero the display. For example, if the
instrument is displaying a 2mA offset, sending this command and enabling Reference (see
:STATe) zeroes the display.
This command is functional only if the instrument is on the specified measurement function.
Sending this command while in any other function causes an error. Also, if the latest reading is
overflowed (“OFLO”) or a reading has not been triggered (“----”), an error occurs when this
command is sent.
The :ACQuire command is coupled to the :REFerence <n> command. See the description for
:REFerence for details.
PRINT #1, "output 16; :func 'volt:dc'" ' Select DCV function
SLEEP 1 ' Allow reading to settle
PRINT #1, "output 16; :volt:dc:ref:acq; stat on" ' Acquire and enable refer-
ence
PRINT #1, "output 16; :volt:dc:ref?" ' Query reference value
PRINT #1, "enter 16" ' Get response from 2002
Parameters
Query
Description
Program fragment
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