Keithley 2002 User Manual

Example Programs
G-17
• Model 8501-1 Trigger Link Cable (connect 2002 to
7001 or 7002)
• Model 7014 Thermocouple Multiplexer Card (installed
in slot 1 of 7001 or 7002)
• Two Type K Thermocouples (connected to channels 2
and 3 of 7014)
• Microsoft QuickBASIC 4.5
• Any one of the following IEEE-488 interfaces:
Keithley Model KPC-488.2
Keithley Model KPC-488.2AT
Capital Equipment Corporation PC<>488
The program assumes that the Model 2002 is set to address
16, and the address of the switch system (Model 7001 or
7002) is set to 7.
Loading user library
The user library for QuickBASIC 4.5 is provided with the
IEEE-488 interface (ieeeqb.qlb). Assuming QuickBASIC
and the user library are in the same DOS directory, enter the
following command line from the DOS prompt:
QB /L ieeeqb.qlb
The above command line will load QuickBASIC and the
user library.
Program (bufclint.bas)
'$INCLUDE: 'IEEEQB.BI'
'
' Initialize global variables.
'
CLS
DmmAddr% = 16
ScanAddr% = 7
Rdg$ = SPACE$(200)
cmd$ = SPACE$(80)
Sme$ = SPACE$(10)
'
'
' Initialize GPIB.
'
CALL initialize(21, 0)
CALL setoutputEOS(10, 0)
CALL setinputEOS(10)
CALL settimeout(5000)
cmd$ = "*CLS"
GOSUB send2002 ' Clear 2002
cmd$ = "*CLS"
GOSUB send7001 ' Clear 7001
Scan Thermocouple Card; Model 7014
Microsoft QuickBASIC 4.5
Keithley KPC-488.2 Interface
©1992, Keithley Instruments, Inc.
Description
This program scans and measures five channels of the Model
7014 Thermocouple Multiplexer Card. Channels 2 and 3 are
configured for Type K TC temperature measurements using
channel 1 as the reference junction. Channels 4 and 5 are
configured for DCV measurements on the 2V range. Seven
scans are performed for a total of 35 measurements.
After all 35 readings are stored in the buffer, they are dumped
out over the bus to the computer where each reading is dis-
played. Also displayed on the computer CRT is the total pro-
cessing time (in seconds) for the 35 readings and the average
time for each reading.
Required equipment
• Model 2002 Multimeter
• Model 7001 or 7002 Switch System

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