Sabtronics 2000 DMM Supplement

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sabtranics mt
INTEANATIONAL INC. ~
P . 0 . ■ 0X 4 83,
0A LAS, TX 71152D&, U.S .A .
MODEL
20QODMM
ASSEMBLY &
OPERATION
MANUAL
© COPYRIGHT 1977. SABTRONICS I T'L ., INC .
ALL RIGHTS RESERVED

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Part
No.
TL-36P
EP-12V
AC-115
AC-230
RM
S-2000
NB-
1
200
NB-500
ADDITIONAL
ACCESSORIES
FOR
THE
MODEL
2000
DIGITAL
MULTIMETER
Description
36"
Test
Leads
Kit.
Includes
high-quality
red
and
black
probes,
banana
plugs,
and
6KV
Belden
test
lead
wire.
External
Power
Kit.
Includes
Voltag
regulator,
Nicad
battery
charging
circuit,
and
external
power
input
jack
that
mounts
to
knock
out
holes
in
the
•eter
case.
External
power
required
is
8.5
to
lSVOC
unregulated
at
150
Ma.
AC
Power
Adapter.
Preassembled,
plug-mounted
calculator
type
power
supply
de
l
ivers
10
voe
at
150
Ma.
Available
for
115
VAC
SO
to
60
Hz
(AC-115),
or
230
VAC
SO
to
60
llz
(AC-230)
power.
True
RMS
Kit.
Contains
parts
necessary
to
upgrade
all
AC
functions
from
sine
wave
cali-
brated
average
sensing
to
true
RMS.
Features
a
precalibrated
laser-trim•ed,
high-accuracy
integrated
circuit
0.5\
error
up
to
20 KHz,
100
KHz
bandwidth
1\
error
,
creast
factor
up
to
7 1\
error,
max.
creast
factor
10
-3\
of
reading
error.
"Sub-C"
Size
Ni
cad
Battery
Pack.
Operates
the
meter
for
10
hours.
(External
power
kit
and
AC
power
adaptor
required
to
recharge
batteries.)
"AA"
Size
Ni
cad
Battery
Pack.
Operates
the
meter
for
4
hours.
(External
power
kit
and
AC
power
adaptor
required
to
recharge
batteries.)
Include
check
or
money
order
for
total
non-
warranty
parts
or
accessories
ordered.
Add
10\
for
postage
and
handling
(minimum
$.SO).
Texas
residents
add
S\
sales
tax.
Outside
U.S.A.
write
for
additiona
l
cost
for
transportation
-2-
Price
$3
.
50
$3.95
$6.95
Available
Late
1977
$12.95
$7.75

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- 3-
OPERATING INSTRUCTIONS
1 .
Introduction
This section of the manual contains information regarding the
correct operation of the Model 2000 DMM . It is recommended that the
contents of the section be read and understood before attempting
to operate the instrument .
2 .
Shipping Information
The t~del 2000 was packed and shipped in a container especially
designed to provide adequate protection. Upon receipt, inspect the
instrument for possible shipping damage or missing parts .
3. Input Power
Operating power for the standard Model 2000 comes from four
non-rechargeable, alkaline (heavy duty) "C" size batteries. This
power source typically provides 25 hours of instrument operation .
Optionally available power sources include rechargeable Ni Cad
batteries and an AC Po w er Adapter. To use these po w er sources, the
meter must be fitted with an external power kit . The instrunent
equipped with rechargeable batteries (4 "C" cells) will typically
operate for 15 hours; recharging , using the AC Power Adapter, takes
approximately 16 hours . If the batteries measure below 4 . 4V under
load, they need to be replaced or recharged. Don't leave low voltaoe
batteries in the meter; acid corrosion ~ay result . The first in-
dication of low batteries will be a dim display.
4. ruse Replacement
The Model 2000 is equipped with a current overload fuse to pro-
tect the instrument circuitry from inadvertent applications of current
in excess of 2 amps . This fuse is located in fuse clips on the main
P . C. board. Replace with a 2 amp AGC or AGX fuse by removinq the
four screws holding the case halves together and liftin9 off the ton
case half .
5. Overrange Indication
When the full scale capability of the selected range for any
function is exceeded , the display will be blank . The overranqe in-
dication does not necessarily mean that the instrument is being
exposed to a damaging input condition. The exact overload conditions
for each range is contained in the specifications.

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ITE M NAME
NUHBER
Display
2 V 11 A
3 Power Switch
4 AC
5 Voll
6 Amp
7 Ohm
8 Rangel
9 Range 2
10 Range 3
11 Xl0
12 Common
- 4-
DESCRIPTION
A 3
1/2 digit display (1999 maximum) of
the measured input, including decimal
point and oolarity sign when appropiate.
Jack for high (red) lead connection to
Model 2000 for voltage , current, (AC or
DC) and resistance measurements .
Turns me ter ON and OFF . AC adapter still
charoes batteries while Power Switch is
off . ·
This switch , when depressed in conjunction
with item 5 or 6, selects AC voltage or
alternatinq current measurement capability.
Works in con junction with the AC and
range switches to select voltage function
(AC or DC) .
Works in conjunction with the AC and
range s w itches to select current function
(AC or DC) .
Selects resistance measurement mode of
operation . Common lead is oositive .
Selects l00mv , lOua , or lMn full scale
ranqes . Mav be used in coniunction with
item 11 (Xl0) to select lV , l00ua, or
l0Mn full scale ranges .
Selects l0V, lma, or l0Kn full scale
ranges. May be used in conJunction w ith
item ll(Xl0) to select l 00V, l0ma , or
l00Kn full scale ranges .
Selects lKV , l00ma, or 10011 full scale
ranges . M ay be used in conjunc t ion with
item 11 (Xl0) to select lA and 1Kl1 full
scale rang es .
Used in conjunction with items 8,9 , and
10 to raise the full scale capability by
a factor of 10 .
Jack for low (black) lead connection to
Model 2000 for all functions.

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REFERF.NCE
DESIGNA'l'OR
Zl ,4
Z2 , 3
ZS
Z6
Z7
VRl , 2 , 3 , 4
CRl,2,3,4,5,
6 , 7,8
Ql
02
Q3 ,4
TRCl, 2
Rl4
RS
R57
R30
R48,49,50 , 51,
-2,53,54,55 , 56
:27
R44
R41
R29
Rl2
R37
R24
- 7
PJI .RTS L IST
DESCRIPTION ()UAi1TITY
IC , Voltage Reference , 20-2:(ADSB0 or MC1 4 03) 2 )(.,
IC, OP Amp, 20-41 (LF356N) 1-.. 2 l(.
IC, Digit Driver (75492 or 492-5) l ~
IC , A/D Converter , 20-786 1 ,<.
IC, Segment, Driver , 20-788 l 1'.
Diode, Zener, 9. lV 4 I.,
Diode , Signal , 1N4148 8 i.._
Transistor , 2SC1849Q l o(_
Transistor, 2N 440 3 1
~
Transistor, 2N 440 0 2
~
TRIAC
T2500B
(30 - ~B ) -
(7-..
~
Resistor, Wirewound, l ohm , 1%,- 5\'I
l
~
Resistor , Carbon
Film, 100 ohm,5 %, 1/41-7 1
Resistor, Metal
Film , 105 ohm, 1%, 1/ 4"1
l
Resistor , Metal Film ,
121
ohm, 1%,
l/4W 1
Resistor ,
Carbon Film,
150 ohn , 5% ,1/4! 1 9
Resistor, Metal
Film , 536 ohm , 1% , 1/ 41-1
l
Resistor ,
t\etal
Film,
887
ohm , 1%, l/4W
1
Resistor,
Metal Film , 976 ohm,
1%, l / 4W 1
Resistor,
Carbon Film,
lK, 5~ I 1/ 41 •/ 1
Resistor, Carbon
Filn ,
l.2K,5 t , l / 4W
1
Re
sistor,
11etal
Film, 1 . 21K,
1%, l / 4W
l
Re sistor ,
Carb o n
Film , l. SK,
5%, 1/ 41-1
1
•Resistor,
Carbon
Film,
1.BK , 5%, l / 4N l
Resist o r ,
Metal
Film,
1.87K, 1%, 1/ 4\v 1

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ll -
PJ\RTS
LIST
REFERENCE DESCRIPTION ()U/\NTJTY
DESIGNATOR
Rl7
R esistor ,
Metal
Film , 2K , 1%,
l/4W
l
R23
Resistor, Metal
Film , 3 .
32K, l %, l /
4W
RJJ
Resistor,
Metal
Film , 4.64K,
1 %, 1/41•/ 1
Rl9
Resistor,
M etal Film ,
5.23K,
l t ,
1/4~/
1
R35
* Resistor,
Carbon Film,
7 . SK , 5% ,
l/4W
l
Rl8
Resistor ,
Metal
Film , 8.06K, 1%,
l/4W
1
RIO
Resistor ,
Metal Film , 9 . 76K,
l %, l/4W
1
R32
*Resistor ,
Metal Film ,
l0K, 1% ,
l/4W
1
R7,20 ,4 0,45
Resistor,
Carbon Film,
l0K, 5% , l/4W
4
R36
Resistor,
Carbon Pilm,
16K, 5% ,
l/4W
l
R2 l
Resistor,
Carbon Film, 47K,
5% , l/2W
1
R4
Resistor ,
Metal Film, 97 . 6K,
1%, l/4W
1
R22,.>4,47
Resistor,
Carbon Film , l00K,
5% , l/4W
3
R43
Resistor ,
Carbon Film, 470K,
5% , l/4W
1
RlS,39,46
Resistor,
Carbon Film , lM,
5%, l/4W
3
R42
Resistor,
Carbon Film, lM, 5% ,
l/2W
1
R38
~Resistor,
Carbon Film, 1 . 8M,
5% , l / 4W
1
R2
Resistor, M etal
Film, 4.64M, 1%,
l/4W
1
RI
Resistor,
Metal Film,
4.99M, 1%,
l/4W 1
Resistor ,
Carbon Film, l0M ,
5% , l/4W
R9
Trimpot ,
100 ohm
l
R25
Trimpot,
250
ohm
1
Rll
Trimpot ,
500 ohm
Rl3
Trimpot,
lK
l
RS
Trimpot ,
SK
1
R31
Trimpot,
l0K
1

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REFERENCE
DESIGNATOR
IU6 , 28
R3
Cl
C2
Cl0
C3
CS, 6, 12 , 13 , 19
Cl8
C20
Cl4,17
C7
C
4, S ,9
ClS
C16
Cll
PARTS LIST
DESCRIPTION
Trimpot, l00K
Trimpot ,
SOOK
Capacitor , Trimmer 6-35 pf
Capacitor, Disc, 24 pf , soov
Capacitor, Disc, 470
pf
Capacitor, Mylar, . 00luf, 200V
Capacitor, Disc, .0luf
Capacitor, Disc, . luf
Capacitor, Mylar, . 082uf, sov
Capacitor, Mylar , .l uf , sov
Capacitor , Mylar, . 22uf, sov
Capac it or, Elect . , l0uf , 16V ,
Capacito r, Elect ., l00uf, l0V
Capacitor, Elect . , l00uf , 16V
Capacitor, Elect ., 220uf, 16V
P. C. Board , Main
P. C. Board , Display
P.C . Board, Switch A ssembly
Switch Assembly
Jack , Red
Jack , Black
Fuse, Clip
Fuse, 2 amp , Type AGC
Component Socket , 18 position
IC Socket , 8 pin
LED, Display. Corimon C athode
Calihr:ttion P;irts <;ct
Axial
QUA NTITY
2
1
1
1
1
1
5
1
1
2
1
3
1
1
1
1
l
1
1
l
2
1
1
l
4

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REFERENCE
DESIGNATOR
PARTS
LIST
DESCRIPTION
Transformer , Cores
Transformer , Bobbin
Battery Holder
Case , Half, Bottom
Case , Half , Top
Front Panel
Standoff , Display
Foot , Case
Panel , Plastic , Rear
Switch , Button , Red
Sw itch , Button , Grey
Switch , Button, Yellow
Wire Stand , Case
Cable , Ribbon , 15 conductor
Magnet, Wire
Buss W ire , i122
Insulated Wi r e , White
Insulated Wire, Black
Tape, Black, 1 /4'' !(iJe
Screw , 4 x 40 x 1/4" Self Tappin9
Screw , 6 x 32 x l 3/4"
Spacer , Switc h
Assem1'ly 'lanual
I 11
Qll/\NTITY
2
l
l
2
2
2
1
4
4
4 in .
11
ft .
2
ft .
2
ft.
2
fr .
I I 2 I t .
6
4
2
•These !>arts are supplied as a set with the ca I i1'1·.:ition nunll,er~ they produce
Two iJentical l'Olt.1/!C rcfl'rcnccs arc uscJ in the meter, J-,ut only OtH'
has hcen measu r ed.

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-11-
ASSEMBLY TECHNIQUES
Before the assembly process is begun, verify that all parts are
present by examining the parts bags and comparing against the
parts list. To speed the assembly process, examine and familiarize
yourself with all parts in the kit so that identification will be
readily accomplished . When capacitors and resistors are installed
in the board, ensure that they are seated flush against the board.
Then bend out the leads slightly to prevent them from falling out
when soldering . After soldering, clip off any excess lead lengths.
A major cause of kit malfunctions is improper soldering. Another
is improper component locations . Be sure you have the ri ght
part in the right place . Pay particular attention to the polarity
on electrolytic capacitors, diodes , transistors and other semi-
conductor devices.
Apply only enough heat and solder to make a good mechanical and
electrical bond . Too much solder can cause solder bridges between
adjacent foil areas on the P . C. Board. You will notice a green
solder mask has been applied to the board to minimize this.
It is recommended that a 25 to 40-watt soldering iron be used with
a tip small enough to allow easy soldering to the small IC
pads but not so small that heat is not retained for soldering the
larger parts . When solder is applied to a component, be sure that
the heat is simultaneously applied to both the component lead and
the component pad on the P.C. Board so that good solder flow will
occur. Be sure that after the soldering operation is complete
that the lead still extends thru the solder smoothly, indicating
a good solder joint . Do not ever blob the solder over the lead
because this can result in a cold solder joint .
rJ!J--~ P.C BOA RO
BEND LEADS OUT
After the entire P . C. Board is assembled, and prior to installing
the board in the case, it is recommended that a solvent be used to
clean the flux off the solder side of the printed circuit card.
This will prevent any dirt from accumulating and shortening the
life of your completed instrument. When applying solvent, be sure
that you hold the board such that no solvent is allowed to enter
the IC sockets, trimpots or switch assembly.
In addition to the parts supplied with the kit, the following are
required to complete assembly:
Resin core solder, flux remover solvent and epoxy glue .