Keithley 2002 User Manual

IEEE-488 Reference
3-141
Before going into the SSTReam mode, make sure the data format byte order is correct for your
computer. IBM and IBM compatibles require the swapped byte order and HP requires normal
byte order (see :FORMat:BORDer).
Important Note: Before going into a stream mode, the instrument must be in continuous initia-
tion. If continuous initiation is disabled (or you are not sure), send the following command to
enable it:
:INITiate:CONTinuous ON
When the :AMEThod command is sent with one of the stream parameters, the instrument will
go into the stream mode and lock out all front panel controls, and ignore all SCPI and Common
commands. When a stream mode is entered, you must wait before addressing the Model 2002
to talk. The minimum delay period is dependent on function and range (see Table 3-17). In a
stream mode, the instrument configures itself as follows:
Auto zero disabled (:SYSTem:AZERo:STATe OFF)
CALC 1 disabled (:CALCulate[1]:STATe OFF)
Line synchronization disabled (:SYSTem:LSYNc:STATe OFF)
For each valid function:
<function> = :VOLTage:AC
:VOLTage:DC
:CURRent:AC
:CURRent:DC
:RESistance
Auto range disabled (<function>:RANGe:AUTO OFF)
NPLC = 0.01 (<function>:NPLCycles 0.01)
Auto NPLC disabled (<function>:NPLCycles:AUTO OFF)
Resolution = 4½ digits (<function>:DIGits 5)
Auto resolution disabled (<function>:DIGits:AUTO OFF)
Filter disabled (<function>:AVERage:STATe OFF)
Auto filter disabled (<function>:AVERage:AUTO OFF)
Reference disabled (<function>:REFerence:STATe OFF)
The stream mode is cancelled when a device clear (DCL or SDC) is sent to the Model 2002.
Keep in mind that the instrument remains at the settings that it assumed for the stream mode.
After cancelling the stream mode, again wait before sending any more commands. (See Table
3-17.)
The delay times in Table 3-17 only account for processing the stream command and the device
clear command. Commands that precede the stream command must be allowed to finish execut-
ing before the stream command is sent. The *OPC? command is recommended for this purpose.
When *OPC? is sent, subsequent commands will not execute until the operations of all previous
commands are completed. The use of *OPC? is demonstrated in Program Fragment #2.
Triggering — In stream, the trigger model functions normally except that the Manual and Hold
control sources cannot be used. The Group Execute Trigger (GET) is functional when the Bus
control source is selected. For optimum speed, set up the measure layer for Immediate control
source, infinite count and zero delay.
Reading Rates — The maximum possible reading rate for the SSTReam mode is 2000 per sec-
ond and is only achievable for controllers that can pull each reading out of the Model 2002 in
less than 100µsec. The maximum possible reading rate for the ASTReam mode is 1000 per sec-

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