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OPERATING INSTRUCTIONS
3-1
.
GENERA
L.
This Bection describes
the
proce-
dures for operating
the
Model
616 as
a
voltmeter^
aiKmetet^,
ohnfflieter,
and
coulcmibmeter.
3-2.
CONNECTIONS.
a.
Input
R e
ceptacl
e.
This receptacle
is
a
Teflon insulated trlaxial connector.
The center
terminal
is
the
high impedance
input; the inner
shield
is
the
low
input; and the outer shield
ia
case,
ground,,
The
ma,ting
connector
is a
Keithley
part
no.
CS-141 trlaxial
plug.
b.
Model 6011 Input Cable
.
This cable
is
a 30
inch long triaxial cable terminated with
3
color-
coded alligator clips.
The input
high
is
Identified
by the
heavy wire with
red insulator.
The input
low
is
identified by
the thin
wire with black in-
c.
Rear Pa nel Terminals.
The rear panel has
six binding posts which
are used for making
special
connections
to
the
Model
616,
1.
XI Terminal
(White).
This terminal
provides
an analog signal
at
unity
gain.
2.
IV
Terminal
(Red).
This terminal provides
an analog signal
with
a
scale factor
of 1
volt for
full range input.
3.
LO Terminals
(Black).
These terminals
provide
a
connection
to
input
low.
Either
terminal may be used for system connections.
4.
GUARD Terminal
(Blue).
This terminal pro-
vides
a
connection
to the
amplifier feedback
when
in the FAST mode.
5.
GROUND Terminal
(Green).
This terminal
provides
a
connection
to
chassis ground.
A
shorting link
is
provided for easy connections
between low and
chassis.
3-3.
F
U
N CTION SELECTION.
The
Model
616
provides
a
single front panel rotary switch for selection
of
function and range.
The RANGE
.Switch
(SlOl)
permits
manual selection
of
any
of
four functions, namely,
VOLT, OHMS, COULOMB, and AMPERE.
3-4„
VOLT FUNCTION.
The Model 616 provides
five
decades
of
voltage sensitivity from
.01000
volts
to 100
volts full range.
Ihe
VOLT function
is
selected by setting
the.
RANGE switch
to
VOLT.
a.
Manual Sensitivity
S
ett ing
s.
The front panel
SENSITIVITY switch has
si,x
positions.
As the
switch
is
rotated counter clockwise, the
seiiBitivity is
increased.
These positions correspond
to
full range
sensitivities
of
100,0V, lO.OOV, l.OOOV, .lOOOV, and
.OlOOOV
as in
Table 3»1-
Position six
is
the
AUTO sensitivity mode which enables either auto-
matic sensitivity
or
remotely selected sensitivity
(when used
with
the
Model
6162)
TABLE
3-1.
\
Sensitivity
j
Setting
Full Range
Disolav
Maximum
Display
1
10
mV
.01000
V
±
.01999 V
100
mV
.1000
V
±
.1999
V
1
1
V
1.000
V
±
1.999
V
10
V
10.00
V
±
19.99
V
1
100
V
100.0
V
±
199.9
V*
1
*The display indicates 000. OV
at
200,0 volts input.
The three least
significant digits will flash
on
and off (blinking
action)
to
indicate
an over-
voltage condition.
The display
will continue
to
read
up to
±201.7 volts with blinking action.
Be-
yond ±201.7 volts the display will indicate 001.7
volts with blinking action.
CAUTION
Voltage inputs greater than ±200 volts are
not recommended since damage
to the Instru'
ment may result
FIGURE
5.
Typical Display on
10
mV
Sensitivity.
0374
5
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