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In this appendix:
Introduction ............................................................................... A-1
Line fuse replacement .............................................................. A-1
Front panel tests ....................................................................... A-2
Upgrading the firmware ............................................................ A-4
Introduction
The information in this section describes routine maintenance of the Keithley Instruments Model
2657A High Power System SourceMeter
®
instrument that can be performed by the operator.
Line fuse replacement
A fuse located on the Model 2657A rear panel protects the power line input of the High Power System
SourceMeter
®
instrument.
Disconnect the line cord at the rear panel and remove all test leads connected to the instrument
before replacing the line fuse. Failure to do so could expose the operator to hazardous voltages that
could result in personal injury or death.
Figure 123: Fuse replacement
WARNING
LINE RATING
100-240 VAC
50, 60 Hz
350 VA MAX.
LINE FUSE
SLOWBLOW
5.0 A, 250 V
NO INTERNAL OPERATOR SERVICEABLE PARTS,
SERVICE BY QUALIFIED PERSONNEL ONLY.
REPLACE FUSE WITH SAME TYPE AND RATING.
WARNING:
INPUT/OUTPUT CURRENT: 120 mA MAX.
RS-232
DIGITAL I/O
LAN
!
IEEE-488
!
!
SENSE
LO
HI
LO
GUARD
SENSE
HI
LO
3030 VDC
MAX.
250 V
MAX.
2
1
Appendix A
Maintenance
Содержание 2657A
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