Features; Manual Addenda; Safetyterms; Unpacking And Inspection - Keithley 595 Instruction Manual

SECTION 1
GENERAL INFORMATION
1.1 INTRODUCTION
The Keithley Model 595 Quasistatic CV Meter is a sensitive
instrument designed to measure capacitance and current.
The Model 595 uses a unique feedback charge method to
stimulate and measure charge steps in the device under
test, from which capacitance is determined. (A DC voltage
is ah available to make basic current measurements). This
method of measuring capacitance is superior to the tradi-
tional '%oltage ramp" method as it allows the user to
distinguish between error currents and the stimulated
signal charge. Correction of capacitance m+surrtients for
the effect of error currents is selectable and can be used
to improve measurement accuracy. The Model 595 has a
built-in &'OV sowce with four precision ~step~voltage
sources. The measuring range of the Model 595 is O.OlpF
to 2OnF for capacitance measurements and lfA to ZOOfi
for current measurements. A 4% digit display and standard
IEEE-488 interface~give the user easy access to instrument
data.
1.2 FEATURES
Some important Model 595 features include:
l
Built-in Voltage Source-&IV @ 2mA voltage source with
lOmV resolution.
l
Bias Waveforms-DC, square wave, and staircase voltage
bias waveforms allow the user to make stepped current
or capacitance measurements, as well as DC current
measurements.
l
Voltage Steps-In -clOmV, 2OmV, 5OmV, and 1OOmV grada-
tions at 0.07 to 199.99sec intervals in O.Olsec increments.
l
Q/t Measurement-Q/t monitors current during
capacitance measurement.
l
Compensates for Error Currents-Selectable capacitance
correction for leakage current errors.
l
4% Digit Display-An easy-to-read front panel LED
display includes a 4% digit mantissa with selectable
alphanumeric or scientific range annunciation.
l
Zero Correct-A front panel zero correct control allows
the user to cancel offsets internal to the Model 595.
l
Reading Modifiers-Baseline suppression and C/C, nor-
malization of readings.
l
Standard IEEE-488 Inte*ace--The built-in interface allows
full bus operation of the Model 595.
. CV and IV Outputs--Built-in C, Q/t or I vs. V analog out-
puts (with automatic pen lii) or IEEE488 digital plotter
output.
l
Digital Calibration-The instrument may be digitally
calibrated from the front panel or over the IEEE-488 bus.
1.3 MANUAL ADDENDA
Information concerning improvements or changes to the
instrument which occur after the printing of this manual
will be found on an addendum sheet included with this
manual. Please be sure that you read thii information
before attempting to operates or service your instrument.
1.4 SAFETY TERMS
The following safety terms are used in this manual:
The WARNING heading as used in this manual explains
dangers that might result in personal injmy or death.
Always read the associated information very carefully
before perfotig the indicated procedure.
The CAUTION heading used in this manual explains
hazards that could damage the inshument. Such damage
may invalidate the warranty.
1.5 UNPACKING AND INSPECTION
The Model 595~Quasistatic CV Meter was carefully in-
spected before shipment; Upon receiving the instrument,
carefully unpack all items from the shipping carton and
check for any obvious signs of physical damage that might
have occurred during shipment. Report any damage to the
shipping agent at once. Retain the original packing material
in case reshipment becomes necessary.
l-l