Temperature Measurements; Two-Terminal Resistance; Resistance Range Output - Keithley 195A Instruction Manual

FILTER
control).
For example,
assume
the following value
is
displayed:
The
resistance value
is
68.423kf2.
Figure 2-7.
Two-Terminal Resistance
Measurement
(Front
Panel
Connections
Shown)
CAUTION:
MAXIMUM
VOLTAGE
360V
PEAK
250V
RMS
Figure
2-8.
Four-Terminal Resistance
Measurements
(Front Panel
Connections Shown)
Table
2-5.
Resistance
Range Output
Values
Range
1
Short
V
Open
20
Q
-
2mA -2V
200 a
-
2mA -2V
2 kQ
-
2mA -2V
20 kQ
-
20
/lA
-2V
200 kQ
-
20
iiA
-2V
2MQ
-0.2
/xA
-2V
20MQ
-0.2
/tA
-2V
2.8.3
Temperature
Measurements
The Model 195A
is
capable
of
temperature
measurements
in
the range
of
-220°C and
-i-630°C
and between -360°F and
-l-1100°F.
Using the instrument to
measure
temperature
is
simply a matter
of
connecting
a
suitable
probe and
entering
front panel
Program
6,
as described
in
Section
3.
Probe Connection
(Using the
Model 1951)—
To
connect
a
temperature probe
to the instrument,
proceed as
follows:
WARNING
To
avoid possible
shock
hazards, discon-
nect
all
test
leads
from
the
Model 195A
before
connecting the adapter box
or
temperature probe.
1
.
Connect
the
Model
1951
Input
Adapter
Box
to the
VOLTS
OHMS
and
OHMS
SENSE
terminals
on
the front or
rear
panel of the
Model 195A
as
desired.
The
input
box
is
designed with
suitable
banana
plugs designed
to
connect
with the
Model 195A banana
jacks
and
includes a 4-wire
connector.
The box
is
designed to connect only
one way.
2.
Check
to see that the
rear panel
INPUTS
switch
is
in
the
correct position.
3.
Connect
the temperature probe to the jack
on
the
front of
the adapter.
If
desired, a
probe
may
be wired using the
connections
shown
in
Figure 2-9.
NOTE
As
shipped, the
Model 195A
is
calibrated
to use
platinum probes conforming
to the
DIN 43 760
standard
(alph
=
0.00385). Instrument
calibra-
tion
may
be changed
for
other standards as
described
in
Section
5.
Probe Connection
(Directly to the
Model
195A)-4-wire
probes
and
sensors can be used without the
Model
1951
In-
put Adapter
Box
by connecting
them
directly to the input of
the
Model 195A
as
shown
in
Figure
2-10(a).
WARNING
Remove
all
test leads
from
the
Model 195A
before connecting the temperature
probe.
2-11