Keithley 2002 Repair Manual

Troubleshooting
2-7
Figure 2-1
Model 2002 overall block diagram
Amps
Sense HI Sense LO
Input HI Input LO
DC Input
Signal
Conditioning
Amps
AC Input
Signal
Conditioning
(w/freq)
Scanner Output
Scanner Inputs
Scanner
Option
Power Supply
F/R Status DC SIG/REF
DC/MUX FETS
TRMS, AVE, PK
FREQ Out
AC FETS
Scanner Control Out
Line FREQ In
ADC
CLK
DATA
STB
TRG
O
P
T
O
I
S
O
Hardware Trigger
Trigger
Select
Logic
ADC Data In CLK DATA STB
Control Data Out
Trigger Delay
Software Trigger
External Trigger, Meter Complete Trigger Bus
56
Digital I/O 68302
Front Panel Reset Front Panel Clock Front Panel Data Out Front Panel Data In
IEEE Data In (ISR)
GPIB
IEEE-488 Bus
Front
Panel
Controller
55 Vdc 5 Vdc 5.5 Vac
ADC Data In
Digital
IEEE Data Out (DMA)

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