Heathkit IM-16 Installation instructions

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595-889-03

Assembly
and
Operation
of the
SOLID-STATE
VOLTMETER
Model lM-16
HEATH COMPANY
BENTON HARBOR,
M|CHIGAN 49022
TABLE OF CONTENTS
Introductiofl. ... ... r...... .... c...
Parts LiSt. "..... o. r r... r........
Step-By-Step Assembly
Circuit Board Assembly., . . . . . . c .
Switch Prewiring And Subpanel
Assembly. . . .. o........... r..
Front Panel Mounting And Wiring. . . .
Cable Assembly Wiring. . . . . . . . . . .
Front Panel Assembly Installation. . " "
Circuit BoardWiring.......... o r o
Rear Panel Assembly, Wiring And
Installation. . . .... r..,. o.. o.,.
Meter-Knobs-Battery Installation" . . .
Probe Assemb1y. r.... ...... ....
Calibratiofr. . . . . . . . . . . . . o o . . o , , . .
Final Assembly. o . . . . .. ... ... . . . ' ..
Operation... o... r... r.... o. r. o c i.
In Case Of Difficulty. " . ..r .. . . . . . . .. .
Troubleshooting Chart. . . . . . . . . . . o o o .
MaintenanC€. . . . . . o . . . , , . . . . . r . . r .
Accessory Probgs" o o . . . .,. oo.. i. c
Speeifications. .. . . . . .. ... . . i o . . . ..
Circuit Dgscriptioh. . .. .. . . . o . . . . . . .
FactoryRepairService.,.. ... ..
Functional Parts List. . .. ... ..
Chassis Photograph. c . . r . o . . r € .,
Circuit Board X-Ray View
(fold-out from Page). . . . . . . . r . r
Replacement Parts Price List" . . . .
Voltage Chart. . .(fold-out from page).. . .
Schematic. . .(fold-out from page).
2
3
4
B
10
72
13
L4
16
1B
20
22
24
26
30
31
32
32
33
34
3?
3B
39
40
40

INTRODUCTION
The Heathkit Model IM-16 Solid-State Voltmeter
combines the features of a vacuum tube volt-
meter and the portability of a volt-ohmmeter
in an attractively styled cabinet. Operationfrom
the power line or from the internal battery is
selected by a single switch. Battery operation
permits accurate voltage and resistance meas-
urements at remote locations without an AC
power source.
All measurement functions (AC Volts, DC- or
DC+ Volts, or Ohms) are selectedbyoneswitch.
Separate range switches are provided for Volts
and Ohms. Voltage readings as low as .01 volt
and resistance readings from .2 ohms to over
500 megohms are read on the large 6 inch
meter. The separate scales for the lower AC
voltage ranges are required to follow diode
response at lower applied voltages.
Additional features of the Solid-State Voltmeter
include: a printed circuit board and a cable
assembly for easyandneat construction, a single
test probe to eliminate tangled test leads, and a
dual-winding fower transformer that allows you
to wire the Voltmeter to operate from either a
120 or 240 volt AC power source.
All of these features combine to give you a
versatile, attractive, and accurate test instru-
ment for long and dependable service at mini-
mum cost.
Refer to the "Kit Builders Guide" for complete
information on unpacking, parts identification,
tools, wiring, soldering, and step-by-step as-
sembly procedures.

PARTS LIST
NOTE: The numbers in parentheses inthe Parts To order replacement parts, refer to
List are keyed to numbers on the Parts Picto- Replacement Parts Price List and use
rial (fold-out from Page ?). Parts Order Form furnished with this
the
the
kit.
PART PARTS DESCRIPTION
No. Per Kit PART
No. PARTS DESCRIPTION
Per Kit
RESISTORS
1/2 wortt
(1) 1-103
1- 119
1-1 3
r-20
L-22
t-25
t-26
1- 30
1- 35
1- 38
2-3t
2-33
SWITCHES
(11)63-433 1 3-position, l,wafer (Power)
1 33 Q (orange-orange-b1ack) (12)63-434 1 ?-position, l-wafer (Ohms)
1 560 Q (green-blue-brown) 63-463 1 4-position, 4-wa-fer
1 2700 Q (red-violet-red) (Function)
2 t0 KQ (brown-black-orange) 63-464 1 B-position, 3-wafer (Volts)
2 22 KQ (red-red-orange)
2 41 Ko (ye11ow-violet-orange) DIODES-TRANSISTORS-LAMP
1 100 KQ (brown-black-
yellow) (13) 56-31
1
1
2
2?0 KO (red-violet-yellow) (L4)57-21
1 MO (brown-black-green) (15)41?-118
3.3 MO (orange-orange- (16)41?-140
6.8 volt zener diode
Silicon diode
2N3393 transistor
Field eff ect transistor (FE T)
Neon pilot lamp
Cabinet half shell
Chassis
Front panel
Subpanel
Rear panel
Battery bracket (1-1/2 volt)
Battery bracket (9 volt)
End cap
Side rail
Front panel bezel
Grommet (B halves)
Line cord strain relief
(for round cord)*
Line cord strain relief
(for flat cord)
Handle
Cup insulator
Foot
Line cord retainer
Pilot lamp lens
Pointer knob
Plain knob
1
4
6
1
1
green)
Precision 1%, 1/2 Wortt
(2) 2-131 1 10 c,
2-24 1 90 s,
2-29 1 900 s}
(17)4t2-t5
90- 346-2
(18) 2oo-493
203-486- 1
(19) 203-487-1
203-488-1
(20) 204-254
(2t) 204-77e
(22) 204-75e-L
(23) 204-?60-1
2L0-34
(24)73-27
(25) 75-30
7 5,71
(26) 211-32
(27)26L-42
(28) 261-28
(2e) 261-30
(30) 413-10
462-245
462-246
METAL PARTS
2-39 1
2-40 1
2-42 1
2-45 1
2-t46 1
2-t47 1
Precision I %,
(3)2-56-1 1
2-55-L 1
CAPACITORS
(4) Zt-Zt 1
(5) zs-ror z
(6)es-tsr 1
(7)25-54 1
CONTROLS
(B) 10-21e 2
(e) 10-57 2
(10) 12-80 1
I 2t62 r, (2.162 Ks,)
1 6838 O (6.838 KO)
21.62 KQ
68.38 KO
216.2 KQ
683.8 KQ
2,162 MQ
6.838 MQ
Wdtt
632.4 KQ
1.3676 MQ
PLASTIC PARTS
1
1
4
2
1
4
1
.005 pfd disc
,015 trrfd tubular
250 pfd electrolytic
10 pfd electrolytic
2000 f}
10 KO tab mount
50 Kf) dual tandem, tab mount
*This strain relief is supplied for use in areas
ma.inly outside the U. S., where 2- ot S-wire
round cords are required.

nr*un @
PART
No. PARTS DESCRTPTION
Per Kit PART
No. PARTS DESCRIPTION
Per Kit
WIRE
89-23
134- 1 60
344-59
341-1
343-11- 1
OTHER HARDWARE
1
1
1
1
1
1
1
1
1
1
1
1
2
1
Line cord
Cable assembly
Hookup wire
Black test lead
Shielded test lead
Front body
Center body
Rear body
Probe tip
Switch lever
Insert insulator
Contact spring
Rivet
E washer
6-32 x 1/4" black screw
6-32 x 1/4" phillips head
screw
6-32 x 3/8" screw
#6 x t/4" sheet metal screw
6-32 xlf2" screw
6-32 decorative screw
6-32 x 7/t6" spacer stud
6-32 nut
#6 fiber shoulder washer
#6 lockwasher
#6 solder lug
MISCELLANEOUS
4-40 x lf4" screw
4-40 nut
#4 lockwasher
Control nut
Control flat washer
Control lockwasher
Speednut
Power transformer
100 microampere meter
Circuit board
2-lug terminal strip
3-lug terminal strip
Battery connector
Battery holder spring
Alligator clip
Alligator clip with threaded
insert
Phone jack
Phone plug
Knob bushing
Line cord plug adapter
Nut starter
Identification label
Kit Builders Guide
Parts Order Form
Manual (See front cover for
part number.)
Solder
(51) 250-52
(52)zez-z
(53) 254-e
(54) 252,1
(55) 253-10
(5q zsq-q
(57\ 252-7s
54-117
407 -125
85-1?8- 1
(58) 431-2
(5e) 431-10
(60) 432-33
(61) 258-?
(62) 260-1
260- 51
(63) 436-20
(64) 438-28
(65) 455- 50
432-27
490- 5
391 - 34
59?-308
597-260
10
10
10
11
6
3
1
PROBE PARTS
(3 1) 45e-44
(32) 45e-45
(33) 45e-43
(34) 477-tt
(35) 45e-46
(36) 45e-47
(37) 258-53
(38) 256-15
(3e) 253-51
1
1
1
1
1
1
1
1
1
1
1
6
1
1
1
1
1
1
#6 HARDWARE
(40) zso-rro 1?
(4t)zso-zze e
(42) 250-8e
(43) 250-365
(44) 250-t62
(45) 250-303
(46) 250-304
(47) 252-3
(48) 253-2
(4e) 254-L
(50) 25e-1
2
B
4
4
4
12
3
11
3
Before you start to assemble this kit, read the
Kit Builders Guide for complete information on
wiring, soldering, and step-by-step assembly
procedures.
CIRCUIT BOARD ASSEMBLV
Components will be installed on the circuit
board by following the steps on Pictorials 1
STEP-BY-STEP ASSEMBLY
NOTE: One t-L/Z volt C-cell battery, and one
9-volt (NEDAI602) battery will be required for
operation of this completed volt ohmmeter. You
may want to purchase these batteries now, to
have them ready when you finish assembling
the kit.
and 2. Position the parts as showninthe Pictor-
ials. Resistors will be called out by resistance
value (in Q, KQ, or MO). The color code will
also be given for color-coded resistors. Some
precision resistors may be marked in O or KQ.
For example, 2162 gl = 2.L62 KQ. Be sure to
install the correct resistor in each step.

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CONT INUE
{...2
START
( ) Locate the circuit board (#85-
1?8-1) and position it lettered
side up as shown in Pictorial 1.
Then perform the following
steps. Do not solder or cut off
any leads until you are directed
to do so in a step.
( ) 100 KO (brown-black-yellow)
( ) 560Q (green-blue-brown).
( ) ZZOO Q (red-violet-red)"
NOTE: Precision resistors are
identiJied by resistance value.
MA = megohm = 1,000,000 ohm
KQ = kilohm = 1,000 ohm
Example: 2.162 Kf,) = 2162 n
NOTE: The Solid-State Voltmeter
can be wired for use with either a
120 volt AC power source or a 240
volt AC power source. Followeither
the 120 VOLT WIRING steps or the
240 VOLT WIRING step, whichever
applies to your needs. ( ) 6.838 MO 1% precision.
( ) 2.162lAlO L% precision.
I2O VOLT WIRING
( ) 1" bare wire. Use hookup wire
with insulation removed.
( ) 1" bare wire.
( ) 683.8 KO 1ft precision.
( ') 216.2 KQ 170 precision.
( ) 68.38 KO 1$ precision.
( ) ZL.AZ KQ 170 precision
240 VOLT WIRING
( ) 3/4" barewire.Usehookupwire
with insulation removed.
\_l u
,.+lr-J
I l. ,
( ) Solder all connections and cut
off the excess lead lengths.
( ) 6.838 KQ l/e precision.
( ) 2,162 KQ 170 precision.
( ) 10 KSl (brown-black-orange ( ) 900 Q lft precision.
( ) 10 KSl (brown-black-orange). ( ) 10 O 170 Precision.
( ) 90 f,) 170 precision.
( ) 3.3 MO (orange-orange-
( ) 22 Ka (red-red-orange).
( ) ss n (orange-orange-black).
( ) 4? KO (yellow-violet-orange
) 22 KA (red-red-orange). ( ) 270 KO (red-violet-yellow).
( ) 47 KO (yellow-violet-orange) ( ) Solder all connections and cut
off the excess lead lengths
PROCEED TO PICTORIAL 2
( ) Solder all connections and cut
off the excess lead lengths.
PICTORIAL I

START
CONTINUE
PICTORIAL 2

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6-32x1/4"
ELACK SCREW
$
46 SOLDER LUG
d6 FIBER SHOULDER IVASHER
Detqil 3A
( ) Mount the battery bracket assembly to the
chassis as shown in Pictorial 3. Use two
6-32 x t/4" blaek screws, #6 lockwashers,
and 6-32 nuts.
( ) Set the chassis aside temporarily.
9 VOLT
BATTERY BRACKET
cHASStS
t-t/2 voLT
EATTERY
BRACKET
d4 LOCKTIASHER
4-40 NI.JT
B
1
ts
I
#6 LOCKWASHER
6-32 NUT
PICTORIAL 3
Refer to Pictorial 3 for the following steps.
( ) Locate the chassis (#200-493) and position
it as shown.
( ) Mount the circuit board to the chassis with
ten 4-40 x t/4" screws, #4 lockwashers,
and 4-40 nuts. Do not tighten the screws
until all of them are installed.
( ) Mount the 9-volt battery bracket as shown.
Use three 6-32 x l/4" black screws, #6
lockwashers, and 6-32 nuts.
( ) Refer to Detail 3A and install the cup insu-
lator, #6 fiber shoulder washer, and #6
solder lug at one end of the 1-1/2 volt
battery bracket. Use a 6-32 x 3/8" screw
and a 6-32 nut. Be sure the mounting holes
are positioned as shown.
( ) At the other end of the t-L/Z volt battery
bracket, mount the battery holder spring,
two #6 fiber shoulder washers, and a #6
solder lug. Use a 6-32 x 3/B".screw and a
6-32 nut.
BATTERY HOLDER
SPRING
6-32 t3/82 ,6 FIBER
SHOULOER WASHER
l-1,/2 voLT \
BATTERY HOLDER
BRACKET