Keithley 617 User Manual

Table 2-3. Typical Display Exponent Values
I Display
IPA
nC
PA
mV
kR
MQ
GQ
Tfl
PQ
ingineering
Units
PA
!lC
PA
mV
kCI
MO
GR
TQ
PO
INPUT-The INPUT connector is a 2-lug triax connector to
be used for all electrometer signal inputs. Note that you
should not confuse a triaxial connector with the BNC type
that is used for the EXTERNAL TRIGGER and ELEC-
TROMETER COMPLETE connections. Also, do not attempt
to force a 3-lug triaxial connector onto the INPUT Connec-
tor. The Models 6171 and 6172 adapters are available to
make the necessary conversion.
2V ANALOG OUTPUT-The 2V ANALOG OUTPUT prc-
vides a scaled O-2V output from the electrometer (2V output
for full range input). The output uses a standard S-way bind-
ing post and is inverting in the volts and ohms modes.
PR!ZAMP OUT-The PREAMI’ OUT provides a guard cut-
put for voltage and resistance measurements. This output can
also be used as an inverting output or with external feedback
when measuring current or charge. The PREAMP OUT has a
maximum output value of k3C0V and uses a standard s-way
binding post.
WARNING
Hazardous voltage may be present at the
PREAMP OUT, depending on the input
signal.
2-6
icientific
Uotation
10-77-A
10-w
lo-GA
lo-3v
103Q
lO@l
low
1012sl
101522
f
N,
rv
1
i
anocoulombr
licroamperes
Millivolts
Kilohms
Megohms
Gigohms
Teraohms
Petaohms
COM Terminal-The COM terminal is a 5way binding post
that provides a low connection for both the 2V ANALOG
OIJ’IT’LT and the PREAMP OUT This terminal is also used
for input low connection when in guarded mode; COM
is internally connected to input low through a lC0Q resistor.
Do not connect PREAMP OUT, COM, or 2V ANALOG
OUTPUT to earth when floating input.
V-SOURCE OUTPUT-The HI and LO outputs are the con-
nections for the internal voltage source. This source can be
used as a stand-alone source or in conjunction with the elec-
trometer section to make resistance measurements as high as
1owL
EXTERNAL TRIGGER INPUT-This BNC connector can be
used to apply external trigger pulses to the Model 617 to trig-
ger the instrument to take one or more readings, depending
on the selected trigger mode.

Keithley 617 Specifications

General

Brand	Keithley
Model	617
Category	Measuring Instruments
Language	English