Keithley 163, 160 Service manual
INSTRUCTION MANUAL
Model 160
Digital Multimeter
and Model 163
Digital Voltmeter
J
OCOPYRIGHT 1976, KEITHLEY INSTRUMENTS, INC.
PRINTED MAY 1976, CLEVELAND, OHIO, U.S.A.
CONTENTS
MODELS 1.60.163
MODEL 160,163
r
ILLUSTRATIONS
1.4
15
16
17
18
1.9
2”
21.
22
23
2 ?
,.
ii(
i 7
SPECIFICATIONS
MODELS 160,163
1074
SECTION 1.
GENERAL DESCRIPTION
1171
Functional 0escripti.m
2-4
2-3
SECTION 2.
OPERATION
MODELS 160, 163
,,,,:,:,, ,,,, ,:.,:,! ,,,:,i;d :,L,,I.,. :
I<,~,
., ,’
:.
T”p”t
Volt.3 Readout
I
1.999
1.999
1.999 1.999
10-3
x
10::
x 19.99
x x 1”
1” 199.9
1.999 1.999
19.99 19.99
1~99.9 1~99.9
1000 1000
Designation
1.999
Ill”
Ill”
1.999
19.99 ”
199.9 v
v
MODELS 160, 163
0572
Decimal Point
I'ositio"
xx.x
.xxx
xxx
x.xx
xx.x
xxx
specifications, model 1602
8
I
SECTION 3.
CIRCUIT DESCRIPTION
-----------------------------.
14
ACCESSORIES
M0Dm.S 160, 163
SECTION 4.
GENERAL. The Model 1601 is a combination ac-dc probe
that enables the user co measure voltages from 45 HZ
to 45 kHz when used with either the Model 160 or 163.
me slide svitch (S101) can be used eo Select either
AC mode or straight-through DC Mode.
SPECIFICATIONS :
-MODE: Straight-through probe does not alter any
Model 160 or 163 specifications except: 1. 150 pico-
farads input capacitance, 2. 0.5 ampere nlaximum
current, 3.
volts thermal offset.
AC (Voltage only):
ACCURACY (400 Hz):.+l% af reading or i0.L volt,
whichever is greater (rms of sine wave to dc can-
“WSiO”).
FREQUENCY RESPONSE: -2% at 45 Hz and 45 kllz.
RANGE: 250 volts rms maximum.
MAXIMUM OVERLOAD: Peak ac plus dc bias must not
exceed 400 volts.
INPUT IMPEDANCE: 0.5 megohm, shunted by less than
20 picofarads.
OUTPUT IMPEDANCE: output: m”St he shunted by 10.2
megohms iI% for rated accuracy (Model 160 and 163
impedance on 1000, 100 and lo-volt ranges).
variation in the 10.2 megohms cauaea 1% additional
error.
0.3 ohm resistive offset, 4. i*o micro-
10%
ACCESSORIES
Item NO. Description
3 Body, Rear
4 strain Relief
5
6 Clip, Alligator (cround)
I Insulator (alack)
8
9 strain Rel~ief 186768
10 Can Shield
Cable, Ground (13” long) SC-33
Cable (40” long)
KeiChley Part No.
246548
24656C
2465X
186768
AC-10
AC-I.,,
SC-30
25128A
CONNECTOR: Shielded Banana Plug
“IMENSIONS, WEIGHT: 6” long x 314” diameter (150 x
20 m), 3-ft. (1 m) cable, nee weight 114 pound
(0.1. Kg).
ELECTRICAL PARTS LIST: (See schematic 24669C)
circuit
”
“eslg.
JlOl
SlOl
Cl01
Cl02
DlOl
0102
D103
RlOl
1~102
R103
RI04
MAINTENANCE:
S,ince the probe assembly should provide good service
with normal handling no maintenance is usually necessary.
The probe body (Items 2 and 3) is fastened together at
the factory using a special solvent. Therefore the
probe should not be disassembled.
mry contact the Keithley Representative in your area.
“‘ZSCriptiO”
Banana Plug (2 req’d)
Switch, AC-DC
capacitor, .047 pF
capacitor, 0.1 p
Transistor
Transistor
Diode
Resistor, 3.92 MO
Resistor, Selected in ‘rest
Resistor, 1 Ml
Resistor, 100 n
If repair is neces-
Code
74970
80164
97419
13050
07263
07263
04713
91637
07716
91637
44655
Dart NO. Part NO.
108-750-Z 11G-3
MZW-F C197-.047M
MwlA C86-.lM
2N3565 w-39
2N3565 TO-39
IN4006
DC-l/4
CEA
NT-l/8 R179-1M
KC”7 R76-100
SW-334
RF-38
13178-3.92M
R88
16
1171
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