Tektronix 130A Instruction Manual

Page 1
Model 130A/131
APPLICATIONS DEPT.
mmm
28775 AURORA ROAD
CLEVELAND, OHIO
1216)
248-0400
44139
Publication Date: June 1984 Document Number: 130A-901-01C
Page 2
WARRANTY
Keithley Instruments, Inc. warrants this product to be free from defects in material and workmanship for a period of ment. During the warranty period, we will, at our option, either repair or replace any product that proves to be defective.
To exercise this warranty, write or call your local Keithley representative, or contact Keithley headquarters in Cleveland, Ohio. prompt assistance and return instructions. Send the instrument, transportation prepaid, to the indicated service facility. Repairs will be made and the instrument returned, transportation prepaid. Repaired products are warranted for the balance of the original warranty period, or at least
This warranty does not apply to defects resulting from unauthorized modification or misuse of any product or part. This warranty also does not apply to fuses, batteries, or damage from battery leakage.
This warranty is in lieu of all other warranties, expressed or implied, in­cluding any implied warranty of merchantability or fitness for a particular
or consequential damages.
90
days.
LIMITATION
use. Keithley Instruments, Inc. shall not be liable for any indirect, special
OF
two
years from date
WARRANTY
You
will be given
of
ship-
STATEMENT
This instrument has been inspected and tested in accordance specifications published by Keithley Instruments, Inc.
The accuracy and calibration
National Bureau of Standards through equipment which is calibrated at planned intervals by comparison to certified standards maintained in the Laboratories
of
Keithley Instruments, Inc.
OF
CALIBRATION
of
this instrument are traceable to the
with
Page 3
S
P
E
C
I F I
CAT1
0
N
S
DC
VOLTS
ACCURACY (2 YEARS)
RANGE RESOLUTION 1E0-2E0C
200mV 100
2v 1 mV
20
v
200
v
1000
v
pv
10mV +(0.25% + 11
100mV
1v
+(%rdg + counts)
MAXIMUM ALLOWABLE INPUT: 1OOOV
750V
peak switched.
INPUT RESISTANCE: 10MR. NORMAL MODE REJECTION RATIO: COMMON MODE REJECTION RATIO:
and
6OHz
(1kQ
unbalance].
AC
VOLTS
ACCURACY (2 YEARS)"
f
RANGE RESOLUTION 1Eo-28OC RANGE
200mV 100
2v 1 mV
20
v
200
v
750 V 1v
MAXIMUM ALLOWABLE INPUT: lOOOV
switched: continuous except
INPUT IMPEDANCE: 10MQ RESPONSE: *Above
10
pv
10mV +(l% + 31 45Hz-500Hz
100mV
Average responding, calibrated in rms
counts.
(Yordg + counts) FREQUENCY
200mV
shunted by less than
DC or peak AC non-switched,
Greater than
Greater than
peak non-switched,
range:
15s
max above
46dB
lOOdB
1OOpF.
of
a sine wave.
at
50Hz, 60Hz.
at DC,
300V.
750V
50Hz
peak
OHMS
ACCURACY (2 YEARS)
f
RANGE RESOLUTION 1Eo-2E0C VOLTAGE
200
2
20
200
20MR
n
kQ kn
kfl
lOOmn i(O.5% + 4)
1n
10
n
100
n
10
kfl
Wrdg + counts) FULL SCALE
<
*
(0.2% + 11
f
(0.2%
f
(0.2%
+(2
% + 11
+ +
1)
1)
< >
>
>
0.5V
0.5V
0.7V
0.7V
0.7V
Page 4
MAXIMUM OPEN CIRCUIT VOLTAGE: MAXIMUM ALLOWABLE INPUT:
1.5V.
300V DC
or rrns.
DC AMPS
MAXIMUM
ACCURACY (2 YEARS)
15s
k(%rdg
rnA
input:
unfused.
RANGE RESOLUTION 18"-28'C
1
2rnA
20rnA
200rnA
2000rnA 1
10 A 10rnA
OVERLOAD PROTECTION:
ble;
10A
PA *(0.75% + 1)
10 pA +(0.75% + 1)
100pA :(0.75% + 1)
rnA
input:
20A
for
+
*(2% *(2% + 1)
2A
counts)
+
fuse
1)
(250V),
FULL SCALE
VOLTAGE
BURDEN
0.25V
0.25V
0.25V
0.7 V
0.3 V
externally accessi-
AC AMPS
ACCURACY (2 YEARS)' MAXIMUM
*(%rdg
RANGE RESOLUTION (45HZ-500H~) BURDEN
1
2rnA
20mA
200rnA
2000rnA
10
A 10rnA +(3% + 5) 0.3 V
PA
10 pA
100pA
1
rnA
+
counts) FULL SCALE
18O-28'C VOLTAGE
*(2% + 2)
*(2%
+ +
2)
2)
f(2% +(3% + 5) 0.7 V
0.25V
0.25V
0.25V
OVERLOAD PROTECTION:
10A
input
10
counts.
20A
ble;
*Above
for
15s
rnA
input:
unfused.
2A
GENERAL
DISPLAY: OVERRANGE INDICATION: MAXIMUM COMMON MODE VOLTAGE:
OPERATING ENVIRONMENT:
ity
STORAGE ENVIRONMENT: TEMPERATURE COEFFICIENT:
0.1
POWER: BAlTERY LIFE:
alkaline cells.
3%
digit
LCD,
0.6'
height, with polarity and range indication.
3
least significant digits blanked.
Oo
up
to
35OC,
linearly derate
x
applicable accuracy specification per
9V
alkaline or carbon-zinc battery
100
hours typical with carbon-zinc cells,
to
3% RH/OC
-35OC
(Oo
5OOC;
to
6OOC.
to 18% and 28O to 50°C):
fuse
(250V),
500V
peak.
less than
from
OC.
(NEDA 1604).
35OC
80%
to
externally accessi-
relative humid-
5OOC.
Less than
200
hours with
Page 5
BAlTERY INDICATOR:
remains.
DIMENSIONS, WEIGHT:
x
3.1" x 1.6')). Net weigth 283gm
ACCESSORIES SUPPLIED:
Diplay indicates
178mm long x 78mm wide x 42mm thick
BAT
when
less
than 10%
(10
Batten/, test leads and operating instructions.
02.).
of
life
(7.0'
TABLE
General Information
ManualAddenda Optional Accessories Preparation for Use Battery
Installation/Replacement Safety Symbols and Terms Safety Precautions
Operation
Safety Precautions for High Energy Circuits
Servicing Information
Dissassembly Instruction Calibration Calibration Procedure PartsList
.........................................
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OF
CONTENTS
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1
4
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6 8
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10 10
11
Page 6
GENERAL INFORMATION
The Model 130A Digital Multimeter is supplied ready for use with a bat­tery. Descriptions of other available accessories, and other general in­formation concerning the instrument can be found below.
MANUAL ADDENDA
Information contained in this manual is believed to be accurate at the time of printing. Any improvements or changes to this manual will be documented in an addendum which will be included with the, instru­ment.
OPTIONAL ACCESSORIES
Model 1301 Temperature Probe
probe designed to allow precision temperature measurement from
-55OC to 150OC.
is a rugged low cost temperature
Model 1304 Soft Carrying Case and Stand Model 1306 Deluxe Case
enough to accomodate the Model 130A plus various other DMM articles such as a spare battery, test leads, etc.
Model 1309 Spare Parts Kit
to maintain up to ten Model 130A DMMs for one year.
Model 1600A High Voltage Probe
1OOO:l division ratio, which means that 1V on the DMM corresponds to 1 kV.
Model 1651 50-Ampere Shunt
made up to 50-amperes. DMM is set to the 2V range, a 50-ampere current will correspond to 50mV (.0500V).
Model 1681 Clip-On Test Lead Set
es) long, terminated with banana plug and spring action clip-on probe.
Model 1682A
250MHz.
RF
Probe
Model 1683 Universal Test Lead Kit
(48 inches) long with 12 screw-in tips, lugs,
two
four heavy-duty tip plugs.
alligator clips with boots,
is a rugged DMM carrying case that is large
is a collection of specially selected parts
extends the DMM to 40kV.
allows current measurements to be
It
is a 0.0010 1 % Cterminal shunt. When the
contains
allows voltage measurements from 100kHz to
two
two
leads, 1.2m(48 inch-
consists of
two
needle tips with chucks and
two
test leads, 1.2177
banana plugs,
two
It
has a
spade
1
Page 7
Model 1685 Clamp-On AC Current Probe
clamping onto
a
single conductor. Interruption of the current path
measures AC current by
is
un­necessary. The Model 1685 detects current by sensing magnetic field produced by current.
Model 1691 General Purpose Test Lead Set
consists of
two
.91m (36
inches) test leads with probe tips terminated in banana plugs.
PREPARATION
Carefully unpack the Model 130A from
FOR
USE
its
shipping carton and inspect for any obvious signs of physical damage. Report any damage to the shipping agent
at
once. The following items are included with every
Model 130A shipment.
1.
Model 130A DMM
2.
Model 130A Instruction Manual
3. 9V Battery NEDA 1604
4.
Test Leads
5. Accessories
The battery
as
ordered.
BATTERY
is
accessible from the bottom of the instrument. Note the
INSTALLATION/REPLACEMENT
precautions on the case before installing or replacing the battery.
Turn the Model 130A off and disconnect test leads before replacing the battery. Put the cover
back into place on the compartment before resuming use of the instrument.
WARNING
A 9V battery is supplied with the instrument but not installed. To install or replace the battery, remove the cover from the battery compartment
it
by sliding cover. The battery connector snaps on and
off in the direction of the arrow located on the battery
off
the terminal of the bat­tery. Improper installation of the battery will cause the connecting wires to be severed by excess strain. Proper installation requires that the bat­tery be positioned in such a manner
(see
drawing) that the leads pro­truding from the boot of the battery connector face toward the outside of the battery compartment.
If
the instrument is going to be stored for a long period of time or in a high temperature environment, remove the battery to prevent leakage damage.
2
Page 8
R103
Figure
1.
Battery
SAFETY SYMBOLS AND TERMS
Installation
The symbol to the operating instructions.
The symbol present on the terminal(s).
The
WARNING
in personal injury or death. The
CAUTION
the instrument.
A
on the instrument denotes that the user should refer
r/
on the instrument denotes that up to
used in this manual explains dangers that could result
used in this manual explains hazards that could damage
lOOOV
may be
3
Page 9
SAFETY
The following safety precautions should be observed before operating the Model 130A
1.
This instrument is intended for use by qualified personnel who
recognize shock hazards and are familiar with the safety precautions required to avoid possible injury. Read over the manual carefully
before operating this instrument.
2.
Exercise extreme caution when a shock hazard is present at the in­strument's input. The American National Standards Institute (ANSI) states that a shock hazard exists when voltage levels greater than 30V rms or pect that before measuring.
3.
Inspect the test leads for possible wear, cracks or breaks before each
use. If any defects are found, replace with test leads that have the same measure of safety as those supplied with the instrument.
4.
For optimum safety do not touch the test leads or the instrument while power is applied to the circuit under test. Turn the power and discharge all capacitors, before connecting or disconnecting the
instrument.
5.
Do
not touch any objects which could provide a current path to the common side of the circuit under test or power line (earth) ground. Always make measurements with dry hands while standing on a dry, insulated surface, capable of withstanding the voltage being measured.
6.
Exercise extreme safety when testing high energy power circuits (AC line of mains, etc.). Refer to the operation section.
7.
Do
not exceed the instrument's maximum allowable input as defined in the specifications and operation section.
DMM.
42.4V
peak are present. A good safety practice is to ex-
a
hazardous voltage is present in any unknown circuit
PRECAUTIONS
off
4
Page 10
OPERATION
The following paragraphs contain information concerning basic opera­tion of the Model reviewed before attempting to operate the Model 130A.
130A. It is recommended that this information be
Low Battery Indicator Minus sign indicates negative
values. Plus sign implied. An over range condition is indicated by followed by a blank display.
‘SET
fl
-INPUTS-Selects appropriate pair
POWER
located on side of instrument).
ELECT FUNCTION AND RANGE DCV-20OmV, 2V, 20V, 200V or
ooov
1
ACV-200mV, 2V, 20V, 200V, or
1
ooov
NOTE:
allowable AC input.
DCA-2mA, 20mA, 200mA,
2000mA
ACA-2mA, 20mA, 200mA,
2000mA or 10A
0-2003, 2k0, 20k0, 200kR or
20M0 of input jacks.
COM, V-0-for
resistance measurements.
COM, mA-for current measure-
ments up to 2000mA.
10A, COM, 10A, HI-for current
measurements up
ON (slide switch
750VAC
or 10A
all
voltage and
is
to
a
maximum
10A.
“1“
Figure
2.
Front Panel Controls
WARNING Do not apply more than ground to the
COM
input jack.
500V
peak above earth
5
Page 11
Do not under any circumstance, use the
COM
or
jack for making measurements. This is
10A HI
and
will
damage the instrument.
input jacks
with
the
COM
a
10A
input short
SAFETY PRECAUTIONS FOR HIGH ENERGY CIRCUITS
CAUTION
To
optimize safety when measuring voltage in high energy distribution
circuits, read and use the directions in the following warning.
WARNING
Dangerous arcs of an explosive nature in a high
energy circuit can cause severe personal injury or
death.
If
circuit, when set to resistance range or any other low impedance
range, the circuit is virtually shorted. Dangerous arcing can result even when the meter is set to a voltage range
reduced.
When making measurements in high energy circuits use test leads that meet the following requirements:
1.
Test leads should be fully insulated.
2.
Only use alligator or spade plugs) for a hands-off measurement.
3.
Use test leads that do not reduce the the voltage spacing.
the meter
test
leads than can be connected to the circuit (e.g.
is
connected to a high energy
a
current range, low
if
the minimum safety spacing is
arc
protection by decreasing
Use the following sequence when testing power circuits:
1.
De-energize the circuit using the regular installed connect-
disconnect device such
2.
Attach the test leads to the circuit under rated leads for this application.
3.
Set the DMM to thg proper function and range.
4.
Energize the circuit using the installed connect-disconnect device and make measurements without disconnecting the DMM.
5.
De-energize the circuit using the installed connect-disconnect device.
6.
Disconnct the test leads from the circuit under test.
6
as
the circuit breaker, main switch, etc.
test.
Use appropriate safety
Page 12
SERVICING
This section contains servicing information for the Model 130A.
INFORMATION
All service information is intended for qualified
electronic maintenance personnel only.
FUSE CHECK
With the instrument set to the 2kQ range, connect a jumper from the
V-Q
jack to the mA jack. The display should read approximately
An overrange display would typically indicate a blown fuse. A display
reading other than approximately .lo0 could indicate a defective current input circuit
FUSE REPLACEMENT
A 2-amp fuse protects the 2mA through 2000mA current ranges. To gain access to the fuse, remove the fuse Compartment cover in the same manner as removing the battery compartment cover.
Remove the fuse by pulling outward on the plastic tab that encircles the fuse body. Install the plastic tab on the new fuse and snap the fuse back into the fuse holder. instrument damage that is not covered by the warranty may occur.
DIODE TEST
(see
schematic).
Turn
off the Model
leads before replacing the fuse. Reinstall fuse compartment cover before attempting to operate the instrument.
WARNING
WARNING
130A
and disconnect the test
Do
not replace the fuse with a higher rated value or
.loo.
The 20kQ range can be used for testing of semiconductor junctions. A
junction
reading when the semiconductor is reversed biased, and an on-range reading, when the semiconductor is forward biased. (The positive).
is
probably good if the Model 130A indicates an overrange
V-fl
jack is
7
Page 13
DISASSEMBLY
INSTRUCTIONS
Place the unit face down on a bench or other similar surface and remove the battery compartment cover. Disconnect and remove the battery. Remove the two
#4-40 X 7/8
retaining screws.
Grasp the bottom cover
at
the input jack end and with a lifting and for­ward pushing motion (see drawing), carefully remove the bottom cover. While removing the cover, feed the battery connector through the
ac-
cess hole in the bottom of the battery compartment.
PC
board
is
The component side of the
now exposed and the battery can be reconnected for troubleshooting. To read the display, some light downward pressure
at
the top of the circuit board may be required in order to make contact through the elastomer contact strip between the circuit board and the LCD.
are
The PC board and LCD assembly
ing screws are removed. Be careful not
not secured once the case retain-
to
allow the PC board and LCD
assembly to fall out or shift out of position during calibration. To remove the PC board from the top cover, grasp the function switch
assembly and cover. The PC board can now be removed using
lift
until the input jacks become disengaged from the
a
slight clockwise mo-
tion to free the two switch knobs from their normal positions in the
case.
The LCD assembly will remain in the top cover when the PC board
removed. Again, be careful not to allow the LCD assembly to fall out
ac-
cidentally. The two switch knobs and bushings can be removed from the PC board
assembly by simply pulling them off the switch shafts. The LCD assembly, along with the zebra strip connector, lifts out of the
case.
is
To
reassemble the Model
130A,
remove the cover on the fuse cornpart-
ment (to position fuse pulling tab) and reverse the above procedures. Be sure to replace the on-off switch cover. Common-mode voltage will
be present on the switch, creating
a
possible hazard if the cover is not
replaced.
8
Page 14
PUSH
FORWARD
TOP
Figure
CASE
3.
Rear
Panel
Removal
1
t
!
c--
,I
II
II
LIFT
Figure
4.
Model
130A
Exploded
View
9
Page 15
CALI BRATION
Calibration should be performed every strument at
humidity of less than Equipment Needed: + 190mV DC voltage source with
or
Model 130A Settings: DCV function, 200mV range, V-s2 and COM input
jacks.
is
an
known to be out of specification. Calibration should
ambient temperature of 23O f3OC
80%.
better.
two
years or whenever the in-
(77O
f5OF), with a relative
-05%
be
done
accuracy
CALIBRATION PROCEDURE
Remove the battery cover to gain access to the calibration pot R103 Figure
1).
Apply
the
+
a
display reading of 190.0 f 1
for
ed
to calibrate the instrument. Calibration should be performed every
two
years.
190mV to the Model 130A input and adjust R103
digit. This
is
the only adjustment need-
(see
10
Page 16
Circuit
Deslg.
BT101
c101 c102 C103 C104 C105 C106 C107 C108
c109 c110
c111 c112 C113
CR101 CR102 CR103 CR104 CR105 CR106 CR107 CR108 CR109
DS101
F101
J1001
J
1002
J
1003 J1004 J1005 J1006
Q101 Q102
R101 R102 R103 R104 R105 R106 R107
Model
Description
Battery, 9V, NEDA 1604 Capacitor, 1 lOpF, 500V, Mica
Capacitor, .047pF, lOOV, Polyester Capacitor, .047pF, lOOV, Polyester Capacitor, .IFF, lOOV, Polyester Capacitor, .lpF, 16OV, Polypropylene Capacitor, 1.5pF, 20V, Tantalum Capacitor, 4.7pF, 20V, Tantalum Capacitor, 1 .5pF, 20V, Tantalum Capacitor, .02pF, lOOOV, Ceramic Disc Capacitor, Capacitor, .1pF, 50V, Ceramic Capacitor, lpF, 20V, Tantalum Capacitor, 4.7pF, 20V, Tantalum
Rectifier, lA, 800V Rectifier, 75mA, 75V Rectifier, 75mA, 75V Rectifier, 75mA, 75V
Rectifier, 75mA, 75V Rectifier, 75mA, 75V Rectifier, 3A, 50V Rectifier, 3A, 50V Rectifier, 75mA, 75V
Liquid Crystal Display Connector, Strip
Fuse,
Jack, Input Jack, Input Jack, Input Jack, Input Jack, Input
Connector Battery
Transistor, NPN, Switch, 2N3904 Transistor, NPN, Silicon, GES5818
Thick Film Resistor Network Thick Film Resistor Network
Pot, 500Q
Thick Film Resistor Network
Resistor, lMQ, lo%, lW, Comp Resistor, NOT USFD
.IFF,
2A,
250V, 3AB, Ceramic Body
.lo,
130A
50V, Ceramic
.5%, lW,
Parts
WW
List
-
Sch
LOC
-
c4
H3 F3 E4 G3 G3 04 D2
D4
c2
c2 D2
D2
F1
c4 C6 c2 c2 D2 D2 A4 84
83
G5 A4
A1 A4 A4
85 85
c4
E5 E3
SEV
SEV
G2
B3,B4
E4
84
Keithley Pert
No.
BA-14
C-320-11OP C-308.047 C-305,047 C-305.1 C-306.1 C-3141.5 C-314-4.7 C-314-1.5 C-316.02
C-238.1 C-238.1
C-3251
I
C-3194.
R
F-38
RF-28
RF-28 RF-28 RF-28 RF-28 RF-34 RF-34 RF-28
DD-27
CS-3762 FU-62 130A-303
130A-303 13OA-303
130A-303
130A-303
BH-29
TG-47
TG-138
TF-97
TF-119
RP-119-500
TF-94
R-2-1M
R-279.1
11
Page 17
Circuit Desig.
R108 R109 R110 R111 R112" R113
R114 R115 R116 R117 R118 R119 R120 R121
R122"
R123"
4T101
s101 s102 S103
u101
u102
U103
VRlOl
"R123
configuration).
~~ ~~
lescription aesistor, 1000, .1%, 1/1OW, MtF
Resistor, 9000, .l%, l/lOW, MtF Resistor, 9k0, ,l%, 1/1OW, MtF Resistor, 90k0, .l%, l/lOW, MtF Resistor, 900k0, .l%, 1/1OW, MtF Resistor, 100k0, lo%, lW, Comp NOT USED
Resistor, 4.72k0, .l%, 1/1OW, MtF Resistor, 10k0, ,l%, l/lOW, MtF Thick Film Resistor Network Resistor, 0.010, 0.5%, lW, NOT USED NOT USED NOT USED Resistor, 9M0, Thick Film Resistor Network
Thermistor, 8mA, 500V, PTC Switch, SPDT, ON-OFF
Switch, Rotary, Range Switch, Rotary, Function
3
Converter CMOS Quad Exclusive Low-Power JFet-Input OP-Amp
Diode, Low Voltage Reference
Supplied Test Lead Set
may
Model
130A
Parts
List (Cont.)
WW
.08%,
2W
1/2-Digit Single Chip A/D
OR
Gate
be
installed in your unit in place of R122 and R1
Sch LOC
-
83 82 B2 82 82
c1
D3
02
S
B5
81 B1
E2
c4
S
E2,
G4
F5, F6
c2 G1
EV
EV
F2
~
Keithley
Part
No.
R-283-100 R-283-900 R-283-9k R-283-90k R-283-900k R-2- 1 OOk
R-283-4.71 k R-283-10k TF-96 R-280-.01
R-281-9M TF-104
RT-7 SW-417 SW-432 sw-433
32440
30847
IC-227 DZ-62
CA-8
(see alternate
12
ALTERNATE CONFIGURATION
Page 18
COMPONENT
LAYOUT
13
Page 19
SCHEMATIC DIAGRAM
INPUT
I
$'"
I
15
Page 20
SERVICE
FORM
Model No.
Serial No.
~
P.O.
No.
date
Name Phone Company Address City State Zip
List all control settings and describe problem.
(Attach additional sheets as necessary.
Show a block diagram of your measurement system including all instruments connected (whether power is turned on
or
notl. Also describe signal source.
Where is the measurement being performed? (factory, controlled laboratory, out-of-doors, etc.1­What power line voltage is used?
Variation? Frequency? Ambient Temperature? OF. Variation?
OF.
Rel. Humidity? Other?
Any additional information (If special modifications have been made by the user, please describe below
1
1
‘Be
sure
to
Include
your
name
and
phone
number
an
this
sewice
form
Page 21
Keithlsy Instruments. lnc./28775 Aurora RoadiCleveiand, Ohio 44139/U.S.A./(2161 2484400/Teiex: 985469
WEST GERMANY: Keithlsy Inatruments GmbH/Heiglhofstrasse 5/D-8000 Munchen 70/314 289/Telex: 1345000 GREAT BRITAIN: Keithlsy Instrurnenta. Ltd./l, Boulton RoadiReading, Berkshire RG2 ONL110734) 88 12 87/Telex: 847047 FRANCE: Keithlsy Instruments SARL/2 Bis,
NETHERLANDS: Keithley lnatrumentr BV/Arkelsedijk 4/NL4206 AC Gorinchem/(01830l 25577/Telex: 24 684 SWITZERLAND: Keithlsy Inatruments SAIKriesbachstr. 4/CH-8660 DubendorfiOl 821 94 44/Telex: 57 536 AUSTRIA: Keithley Instruments Gss.m.b.H/Doblinger Hauptstr. 32/A-1190 Wien/0222 314 289/Telex: 134500
Rue
LBon
Blum/B.P.
60/91121 Palaiseau Cedexll61 0115 155/Telex:
600933
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