SECTION 1
GENERAL INFORMATION
1.1 INTRODUCTION
The Keithley Model 617 Programmable Electrometer is a
highly sensitive instrument designed to measure voltage, cur-
rent, charge, and resistance. Two forms of resistance
measurements are included in the standard configuration: a
constant current method, and a constant voltage method that
uses a built in voltage source for greater sensitivity. The
measuring range of the Model 617 is between 1OpV and 200V
for voltage measurements, O.lfA and 2OmA in the current
mode, O.ln and 200GO (up to 1OlQ using the built in voltage
source), and lOfC and 20°C in the coulombs mode. The very
high input impedance and extremely low input offset current
allow accurate measurement in situations where many other
instruments would have detrimental effects on the circuit be-
ing measured. A 4% digit display and standard IEEE-488 in-
terface give the user easy access to instrument data.
1.2 FEATURES
Some important Model 617 features include:
l 4% Digit Display-An easy to read front panel LED display
includes a 4% digit mantissa plus a two-digit alpha or
numeric exponent.
l Autoranging-Included for all functions and ranges.
l Digital Calibration-The instrument may be digitally
calibrated from the front panel or over the IEEE-488 bus.
l Zero Correct-A front panel zero correct control allows the
user to cancel any offsets.
l Baseline Suppression-One button suppression of a
baseline reading is available from the front panel or over the
IEEE-488 bus.
l One-shot Triggering-A front panel control for triggering
one-shot readings from the front panel is included.
l Isolated IOOV Voltage Source-A built in 1OOV scwrce is
isolated from the electrometer section. The voltage source is
programmable in 50mV steps.
l Selectable Guarding-A selectable driven cable guard is in-
cluded to optimize speed.
l Standard IEEE-488 Interface-The interface allows full bus
programmable operation of the Model 617.
l Analog Outputs-Both preamp and 2V full range analog
outputs are included on the rear panel.
l 100~Point Data Store-An internal buffer that can store
up to 100 readings is accessible from either the front panel
or over the IEEE-488 bus.
l Minimum and maximum data points can be stored and are
accessible from the front panel or over the IEEE-488 bus.
1.3 WARRANG INFORMATION
Warranty information for your Model 617 may be found in-
side the front cover of this manual. Should you need to use
the warranty, contact your Keithley representative or the fac-
tory for information on obtaining warranty service. Keithley
Instruments, Inc. maintains service facilities in the United
States, West Germany, Great Britain, France, the
Netherlands, Switzerland, and Austria. Information concern-
ing the operation, application, or service of your instrument
may be obtained from the applications engineer at any of
these locations.
1.4 MANUAL ADDENDA
Information concerning improvements or changes to the in-
strument which occur after the printing of this manual will be
found on a” addendum sheet included with this manual.
Please be sure that you read this information before attempt-
ing to operate or service your instrument.
1.5 SAFETY SYMBOLS AND TERMS
The following safety symbols and terns are used in this
manual and found on the instrument:
The A
symbol on the instrument indicates that the user
should refer to the operating instructions in this manual for
further details.
The WARNING heading as used in this manual explains
dangers that might result in personal injury or death. Always
read the associated information very carefully before per-
forming the indicated procedure.
The CAUTION heading used in this manual explains hazards
that could damage the instrument. Such damage may in-
validate the warranty.
l-l
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