Artisan Technology Group is your source for quality
new and certied-used/pre-owned equipment
• FAST SHIPPING AND
DELIVERY
• TENS OF THOUSANDS OF
IN-STOCK ITEMS
• EQUIPMENT DEMOS
• HUNDREDS OF
MANUFACTURERS
SUPPORTED
• LEASING/MONTHLY
RENTALS
• ITAR CERTIFIED
SECURE ASSET SOLUTIONS
SERVICE CENTER REPAIRS
Experienced engineers and technicians on staff
at our full-service, in-house repair center
Instra
Remotely inspect equipment before purchasing with
our interactive website at www.instraview.com
Contact us: (888) 88-SOURCE | sales@artisantg.com | www.artisantg.com
SM
REMOTE INSPECTION
View
WE BUY USED EQUIPMENT
Sell your excess, underutilized, and idle used equipment
We also offer credit for buy-backs and trade-ins
www.artisantg.com/WeBuyEquipment
LOOKING FOR MORE INFORMATION?
Visit us on the web at www.artisantg.com for more
information on price quotations, drivers, technical
specications, manuals, and documentation
SCR250
SCR & TRIAC
Schematic and Parts List
TEST
ACCESSORY
3200 Sencore Drive,
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com
Sioux
Falls, South Dakota 57107
SCR250
SCR & TRIAC
Operation and Application
.-
-
..
' ........ -
..
.
·:....
..
',~~~~~i'ilt~~~~U·~~~·;~;··:
..
:
..
,
. ·
.
~····"
.·
TEST
Manual
'
..
....
..
-.---~~~
ACCESSORY
-:·.:
..
:
·-
-
..
·
~~
-:
...
··
SCR
250
SEN
3200
Sen
core Drive,
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com
CORE
Sioux
Falls, South Dakota 57107
1
TABLE
OF
CONTENTS
SAFETY PRECAUTIONS
DESCRIPTION
Introduction
Specifications
Controls
OPERATION
Introduction
Battery
Battery Test
Mounting
Connecting
Testing
Testing
APPLICATION SECTION
SCR
Operation
SCR
Types.
TRIAC Operation
Testing
Determining Operating Voltage
SERVICE AND WARRANTY INFORMATION
................................................
....................................................
.................................................
Installation/Replacement
.........................................
The SCR250 On The
The SCR250 To The
SCRs
TRIACs
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
SCRs And TRIACs For Leakage
•.....•.....•............•
.....................................
.............................
"Z
METER"
"Z
METER"
.........
.........
.............................................
.....
....
...
........
...........................................
......
Of An SCR Or TRIAC .........
..........
....
........
.•.....••.
..
.........
......................
Inside
.......
...
......
........
.............
Inside
Front
Cover
.
........
.
.......
....
......
........
. 15
Back Cover
3
3
5
6
6
7
7
9
10
11
12
14
15
2
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com
DESCRIPTION
Introduction
The
SCR250
with
any
SCR250 dynamically
for
turn
The
SCR250 also dynamically
turn
on
voltage
Specifications
SCR
Tests
SCR & TRIAC
Sencore Z-Meter to simplify SCR and
on and leakage under normal operating voltage conditions.
in
both
the forward
levels.
(Out-of-Circuit)
tests
Test
Accessory is designed
both
sensitive
tests
TRIACS for leakage
and
reverse direction
gate
TRIAC
and
at
testing. The
normal
normal operating
to
be used
gate
and
SCRs
proper
Dynamic
voltage
used,
SENSITIVE
to
the
NORMAL
the
TRIAC
Dynamic
and
voltage
POSITIVE
applied
NEGATIVE
applied
voltage
respect
General
TEMPERATURE
POWER
included).
drops
SIZE:
WEIGHT:
test
of
SCRs for
equals
not
gate
gate
lead when
Tests
reverse direction. Maximum
range
to
to
negative with respect to
to
below
1.8"
the
maximum
to exceed 1000 volts.
GATE TEST: Maximum
lead when
GATE
(Out-of-Circuit)
test
of
of
GATE
gate
GATE
gate
MTllead.
REQUIREMENTS:
BATTERY OK
3.5
X 6.2" X
1.2 pounds
GATE
TEST:
GATE
TRIAC
the
Z-Meter used,
BIAS
lead when
BIAS
lead when
RANGE
volts.
6.5"
with
"turn
on"
and
for leakage. Maximum
leakage voltage range
gate
current
CURRENT
Maximum
CURRENT
for
"turn
on"
not
TEST: Maximum
GATE
HWD.
CURRENT
TEST: Maximum
GATE
LED
CURRENT
MTl
(Typical): 32-130 degrees F.
Three
will light
batteries.
button
gate
current
button
and
test
to
is depressed.
leakage in
voltage equals
exceed 1000 volts.
button
lead. MT2 lead negative with
AA
batteries
if
combined
of
the
of 2.6 rna applied
is depressed.
of 62 rna applied
both
the
the
gate
current
is
depressed.
gate
current
button
depressed.
required
battery
test
Z-Meter
to
forward
leakage
of 62 rna
of
62 rna
Gate
(not
voltage
3
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com
TEST
coded
SCR or
I
i
LEADS
and
TRIAC
(supplied): one multiconductor
test
cable with color
labeled E -Z Hook® connectors for ease of connection
under
test.
SCR & TRIAC
TO BE USED
Wll
H ANY S(NCOAE l - M( l
ER
CO
NNECT TO
SCRO~
HUAC
to
the
The front
with
E-Z Hook Is a registered trademark of
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com
this
panel
unit
controls. (NOTE: Use
only.)
E-Z
Hook. Division
the
39G196 TEST LEADS
of
Tektest, Inc.
4
supplied
Controls
1.
BATT
ration
ope
2.
PUSH
determine
3.
SENSITIVE
current
testing
4.
current
testing
5.
gate
6.
gate
position.
checking
direction.
7.
under
when GATE
sensitive
NORMAL
when
normal
POSITIVE
voltage
NEGATIVE
voltage
GATE
test.
OK
LED-Lights
when
the
PUSH
FOR
BATT
battery
condition.
GATE
gate
GATE
GATE
gate
GATE
when
GATE
GATE
when
Reverses
the
the
operation
CURRENT
FOR
TEST
SCR
CURRENT
type
SCRs.
SCR
BUTTON-Provides
CURRENT
type
SCRs.
BIAS
CURRENT
BIAS
GATE
polarity of
of
BUTTON
if
the
battery
BATT
BUTTON-Use
voltage is sufficient for
TEST
button
with
BUTTON-Provides
button
TRIAC
TRIAC
CURRENT
the
the
TRIAC
- Applies
is in
button
is
BUTTON-
button
is in
BUTTON- Provides a negative
BUTTON
MTl
and
in
the
gate
is
pressed
BATT
OK
a low level
the
"ON"
position for
a normal level
in
"ON"
position
Provides a positive
the
"ON"
position.
is
in
the
MT2
TRIAC
leads for
"reverse" current
current
to
component
.
LED
gate
gate
"ON"
to
for
8.
TEST
LEAD
JACK-Supplies
test
voltages to component under
test.
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com
5
OPERATION
Introduction
The
SCR250 connects
TRIACs
leakage
dynamically
conditions.
results
the
can
Simplified
SCR250 for quick reference.
gate
be
for
voltage
The
of
these
current
easily
operating
proper
test
Z-Meter's digital
tests.
operated
turn
supply
the
SCR
The
needed
instructions
to
any
on
of
SCR250 selects
to
using
Sencore Z-Meter to analyze SCRs
and
for excessive leakage current.
the
Z-Meter supplies
or
TRIAC
turn
under
leakage
the
SCR
the
information
are
current
the
or
included
the
normal
desired
TRIAC
on
on
test
operating
display
test
on. The SCR250
the
the
and
The
voltage
shows
and supplies
front panel.
top of
to
voltage
the
the
Battery
The SCR250 requires 3
batteries
replaced.
To install
l.Remove
the
2.Pull
pull
3.Install3
the
Figure
4.Slide
5.Secure
Installation/Replacement
typically give
or
rear
of
the
tab
.
polarity
1.
the
the
replace
the
the
battery
"AA"
battery
battery
batteries:
two
screws securing
SCR250.
holder
batteries,
indicators
holder
compartment
''
AA''
up
to
out
matching
on
the
back
batteries
3600
the
of
the
battery
into
the
cover
for operation. Three alkaline
tests
before
battery
battery
the
polarity
compartment
battery
with
the
compartment
they
need
compartment
of
the
batteries
as
compartment.
two
screws.
cover
using
shown
to
be
on
the
and
in
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com
6
Fig.
1:
Installing batteries.
.....
...
'1
..
Battery
The
BATT
FOR
batteries
To
test
l.Press
Test
condition
TEST
BATT
TEST
are good.
battery
the
PUSH
of
the
batteries
button
on the front of
button
condition:
FOR
is
easily
is pressed, a
BATT
TEST
tested
the
BATT
using
SCR250. When
OK
button
LED
on
the
the
PUSH
will
front
the
light
FOR
PUSH
if
the
of
the
SCR250.
2.0bserve
on, replace
section
Mounting
The
or
it
The
supplied
strips
called
nylon
Velcro is a registere d t•ademark of V
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com
the
the
on
''Battery
BATT
batteries following
The
OK
LED.
If
the
BATT
the
procedures given in
Installation/Replacement''.
SCR250
On
The
"Z
OK
LED
METER"
does
SCR250 can be placed in a convenient location beside
can
be secured
SCR250 can be secured
with
called the "hooks"
the
"hooks" feel rough
"hooks
to
the
top of
the
Z.Meter for portable use.
to
the
Z.Meter using
the
SCR250. The SCR250 comes with two Velcro®
and
two
strips
called
to
the
touch
". The
strips
elcro
called "loops" feel much softer
USA, Inc.
7
the
due to
the
Velcro®
"loops".
the
many
the
the
to
The
the
not
come
previous
Z·Meter
strips
strips
rows of
touch.
To
attach
the
SCR250
to
a Z-Meter:
1. Clean
the
top
of
the
Z-Meter
good household cleaner
strips
to
the
case.
2.
Remove
strips
the
top
and
of
the
protective backing from one of the
mount
the
the
Z-Meter,
strip
as
and
the
bottom
to
ensure
proper
immediately behind
shown in
Figure
of
adhesion
2.
the
SCR250
of
the Velcro®
''loop''
the
type
warning label
with
Velcro®
on
a
Fig.
2:
3.
Mount
Velcro® strips installed
the
other
"loop"
on
type
the top
Velcro®
of
a "Z METER".
strip
on
the
top
of
the
Z-
Meter two inches behind the previously installed Velcro® strip.
4.
Place
the
SCR250 on
Determine where
of
the
SCR250
the
Z-Meter.
5.
Mount
the
SCR250 so
mounted on
6.
Place
the
mate
the
Velcro® strips. The SCR250 is now securely fastened
Z-Meter
Velcro Is a registered trademark
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com
as
shown
the
in
order to
two
"hook"
they
will
the
Z-Meter.
SCR250 on
in
top
Velcro®
mate
top
Figure
of
Velcro USA, Inc.
of
the
Z-Meter in
strips
need
to
be placed on the
mate
with
the
Velcro®
type
Velcro®
strips
with the two "loop"
of
the
Z-Meter
and
3.
8
the
location desired.
strips
to
the
type
press
installed
bottom of
Velcro®
down firmly
bottom
on
the
strips
to
to
the
Fig.
3:
SCR250 mounted on top
To
remove
the
SCR250 from
example), simply pull
strips
will release their hold
SCR & TRIAC
of
a
the
Z·Meter (to replace
up
on one corner of
and
the
TEST
ACCI!SSORV
"Z
METER".
o,jATI
oii!RlNl
"IS'
tlAJ)
the
batteries, for
the
SCR250. The Velcro®
SCR250 can be removed.
Connecting The SCR250
The
SCR250 is electrically connected to
coming
also
out
the
back
supplied with
of
the
the
SCR250
To
The
''Z
METER''
the
Z·Meter
SCR250. A 39G 196
to
connect
to
the
TEST
SCR or
through
LEAD
TRIAC
a cable
cable
under
is
test.
NOTE:Use
SCR250.
The
three
and
are
To
connect
!.Connect
LEAD
2.Connect
front
of
Velcro
is
a registered trademark
E-Z
Hook
is a registered trademark
the 39G196
Do
not
E-Z
marked
the SCR250
the
jack
on
the
the
SCR250.
test
lead cable
use
any
other
type
Hook
® connectors are color-coded for lead identification
with
the
to
cable from
the
front
of
39G 196
TEST
ol
Velcro
of
E·Z Hook, Division
component
the
the
the
USA,
Inc.
leads
Z·Meter:
back of
Z-Meter.
LEAD
of
of
test
they
the
to
the
Tektest, Inc.
that
is supplied
lead
with
this
are to be connected
SCR250
TEST
to
the
LEAD
with
the
instrument.
to.
BNC
TEST
jack
on
the
9
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com
Testing
SCRs
The following procedure checks
SCR
must
pass
both
checks before
To
test
an
SCR with
l.Connect
a.
b.
c.
the
Connect
Connect
Connect
the
the
the
r--------
Be sure
corresponding
connection can damage
2.
Press the
BUTTON depending on
NOTE:
button
for proper tum-on.
test
in
the
SENSITIVE
If
the
first. This supplies a lower current to check
step
4, press the
the
SCR250:
SCR250
test
leads
Blue E-Z Hook®
Black E-Z Hook®
Red E-Z Hook®
test
leads from
leads on
the
the
SCR
type
is unknown, press the
If
the
unknown
NORMAL
WARNING----------.
the
GATE
type
an
SCR for
it
is considered good.
to
the
to
to
to
the
the
SCR250 are connected to
device
device under test.
button
"turn-on"
SCR
as
follows:
the
SCR
gate
the
SCR cathode lead.
SCR anode lead.
under
test. Incorrect lead
or
the
of SCR being tested.
SENSITIVE
SCR
does
not
GATE
button
and
and
leakage. The
lead.
NORMAL
sensitive
pass
the
repeat step
the
GATE
GATE
gate
SCRs
"tum-on"
4b.
3.
Set
the
APPLIED
the
Z-Meter
rated
to
voltage is
Operating Voltage of
section of
4.Perform
a. Depress
b.
Meter
that
5.
Perform
a.
b.
Meter
E·Z
Hook
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com
this
manual.
the
"turn-on" test:
the
Press
the Z-Meter
will overrange with flashing "888" for a good SCR indicating
the
device is
the
"leakage" test:
Set
the
GATE
Press
the Z-Meter
will show no leakage for a good device.
Is
a registered trademark
VOLTAGE or
the
rated
not
known, refer
GATE
"turned
CURRENT
of
LEAKAGE
VOLTAGE switch
working voltage of the SCR under test.
to
the
section on "Determining
an
SCR
or
CURRENT
LEAKAGE
on"
and
button
LEAKAGE
E·Z Hook, Division
TRIAC"
button
button
current is flowing through it.
button. The display on
of
Tektest, Inc.
10
found
in
to the
''ON''
. The display on the
to
the
"OFF"
the
Applications
position.
position.
the
Z-
Z-
If
on
the
the
Testing
The
both
pass
To
Test
TRIACs
following procedure checks a
the
all
tests
a TRIAC
"forward"
before
and
it
is considered good.
with
the
the
TRIAC
"reverse"
SCR250:
for "turn-on" and leakage in
direction. The
TRIAC
must
1. Connect
a. Connect the Blue E-Z Hook®
b. Connect the Black E-Z Hook®
c.
the
SCR250
TEST
LEAD
to
Connect the Red E-Z Hook® to
to
......---------WARNING-----------.
Be
sure
corresponding
connection
2.
Press
the
3.
Set
the
APPLIED
the
Z-Meter
the
rated
voltage
Operating
section
4.
of
Perform
a.
Depress
this
the test leads from
leads on
can
damage
POSITIVE
GATE
VOLTAGE or
to
the
rated
working voltage of
is
not
known, see
Voltage
of
an
manual.
the
"turn-on"
the
GATE
test:
CURRENT
the
the
device
the
device under test.
BIAS
LEAKAGE
SCR
or
TRIAC"
to
the
TRIAC
the
gate
the
MTllead
the
MT2lead
SCR250 are connected
under
button
on
as
follows:
lead
of
the
TRIAC.
of
the
TRIAC.
of the
TRIAC
test. Incorrect lead
the
SCR250.
VOLTAGE switch on
the
TRIAC under
the
section on "Determining
button
found in
to
the
the
"ON"
Applications
position.
to
.
the
test.
If
the
b.
Press
Meter
indicating
c.
Press
Perform
5.
a.
Set
b.
Press
Meter
c.
Press
E·Z
Hook
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com
the Z-Meter
will
overrange
that
the
NEGATIVE
the
''leakage''
the
GATE
the Z-Meter
the
LEAKAGE
with
device is
GATE
test.
CURRENT
LEAKAGE
button. The display on
flashing
"turned
BIAS
button
button.
will show no leakage for a good device.
the
POSITIVE
Is a registered trademark of
GATE
E·Z
Hook, Division
BIAS
of
Tektest, Inc.
11
"888"
on"
for a good
and
is conducting.
buttonandrepeatstep
to
the
"OFF"
position.
The display
button
and
repeat
on
step
the
Z-
TRIAC
4b.
the
Z·
5b.
APPLICATION
SCR
Operation
SECTION
A Silicon Controlled Rectifier (SCR) is a three lead device
functions like a
SCR has a cathode lead
A
third
lead, called
An
SCR functions like
diode when
the
signal applied to
schematics for
with
the
exception of
the
DC
SCR is
an
Red
Anode
switch when given
and
an
anode lead
the
gate
lead, controls
an
open circuit when
"turned
the
gate
SCR. Notice
the
gate
Test
Clip
on" . This SCR action is controlled
lead. Figure 4 shows
that
lead.
SCR
Blue Test
Clip
the
proper control signal.
just
like a
standard
the
operation
it
is
"turned
the
the
symbol looks similar to a diode
Black Test
Clip
Cathode
of
the
off" and like a
symbol used on
rectifier.
that
An
SCR.
by
Fig. 4: Schematic symbol
With
no
gate
current applied
switch
inability
or
applied between
voltage
SCRs
"turned
forward direction only.
Another common failure
that
is
in
the off position. One common failure of SCRs is
to
completely
leaky. Some defective SCRs become leaky only when the voltage
the
and
thus
they
"turn
on"
when a small
on"
SCR
acts
of
shut
anode
must
just
in
an
SCR
with SCR250
to
the
gate
off.
The
SCR
may
and
the
cathode is near
be
tested
like a diode, allowing
In
the
SCRs
at
their operating voltage.
current
is applied
reverse direction, no current flows.
is
a failure
test
lead connections.
lead,
the
SCR acts like a
be either totally
the
peak operating
to
their
current
to ''tum
on.''
gate
to
shorted
lead. A
flow
in
the
the
12
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com
SCRTypes
SCRs
ratings.
Sensitive
from
gate
only
come
distinguished
For
reliable use. Internal
triggering
Heat
"turning-on"
"turning-on",
into
cathode
internal
accidentally
these
most
thus
type
come
in
a variety of sizes, shapes,
current
They can, however, all be classified into one of
Gate
and Normal Gate. Sensitive
the
fact that
they
are
very sensitive
lead. They are typically used
in
low
Gate
to
the
current
a small gate control current is available. Sensitive
in
a variety
many
applications, Sensitive
circuits,
can
also cause internal leakage
them.
lead
currents
SCRs require a higher external
applications, this additional
these
SCRs have become more popular
and
are called • 'normal
of
physical shapes
by simply looking
currents
may
accidentally cause these SCRs
at
in
and
sizes and
them.
Gate
SCRs, are too sensitive for
the
SCR, or small
currents
the SCR.
many of
them
To
have
prevent
an
SCRs from accidentally
internal bleeder resistance built
This bleeder resistance is placed between
as
shown
that
"turning
in
figure
might
on"
Anode(A)
build
by
or
standard
5.
The resistance bleeds off any
up
and
itself. Due
gate
gate
current
gate
to
current
SCRs.''
ratings,
and
two
SCRs
get
their
current
applied
applications where
Gate
can
not
currents
to
"turn
to rise
prevents
the
to
the
the
gate
the
SCR from
internal resistance,
to
turn
them
is easily obtainable,
than
the
sensitive
voltage
types:
name
to
the
SCRs
be easily
in
the
on."
point
of
and
on.
In
gate
Gate(G)
Cathode(K)
Fig.
5:
Equivalent
circuit
of
a normal gate
SCR.
13
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com
TRIAC
Operation
A TRIAC is a bidirectional device similar in operation
except
Figure 6 shows
symbol resembles
three leads labeled: GATE,
same function
other two leads
function of these leads change
to the leads. The
simply called
called
that
it
passes current
the
schematic symbol for a TRIAC. Note
two
diodes facing opposite directions. A TRIAC
MTl
as
the
gate
lead on
are
labeled differently from an SCR because
TRIAC
the
Main Terminal 1 (MTl) lead,
the
Main Terminal 2 (MT2) lead.
lead electrically closest
in
both
and
with
directions when
MT2. The
an
SCR:
it
the
polarity
gate
turns
of
and
"turned
lead performs
the
device on.
the
voltage applied
to
the
the
TRIAC
Red Test
Clip
Terminal2
(MT2)
Blue
Clip
Test
Black Test
Clip
to
an
SCR
on.''
that
The
gate lead
other lead
the
has
the
the
is
is
Fig.
6:
Schematic
symbol
of
a TRIAC
with
SCR250 test
lead
connections.
TRIAC failures are much
in
a
failure mode
not
be
"turned
direction
is
that a TRIAC
but
TRIAC
on."
A defective
properly
functionally looks like two SCRs facing in opposite
directions. A defective
direction only
in
the SCR analogy, were
as
would be the case if one of
the
same as SCR failures.
is
an
open.
TRIAC
pass
it
in
the
TRIAC can fail
to
fail,
or
One
common
In
other
words,
can fail
to
pass
the
TRIAC can
current
on
other direction. The reason for
to
pass
it
can fail
a current
the
two antiparallel SCRs,
to
pass
current
in
in
one
this
one
both
directions.
SCRs,
Like
one direction only
"leaky"
TRIACs
only when
can
become leaky. A defective TRIAC can
or
in
both
directions. Some
the
full
working voltage is applied
TRIACs
to
them.
leak
in
become
14
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com
Testing
The
the
position.
button
leakage
true
If
you
used
LEAKAGE
LEAKAGE
1 microamp
should
show
SCRs
leakage test for SCRs
GATE
Any
is depressed is
test
indication
need a more critical leakage reading for SCRs, such
in
the
not
exceed 10
slightly different leakage currents in each direction.
And
TRIACs
CURRENT switch on
reading displayed
the
leakage of
is performed
of
the
high voltage shutdown circuits
RANGE switch
RANGE switch in
will
be measured.
at
leakage under normal operating voltages.
uA
at
For
Leakage
and
TRIACs
on
the
rated
to
this
The
room temperature.
is done automatically when
the
SCR250
the
Z-Meter while
the
component
voltage of
the
100uA range.
position, leakage
leakage
is
the
device
of
TV s, place
currents
in
SCRs
TRIACs
in
the
"OFF"
the
LEAKAGE
under
test.
and
gives a
as
for those
With
down
and
TRIACs
will normally
The
the
the
to
Some
become
in
warm,
TRIAC
Determining
SCRs
stamped
voltage
working
methods.
A
obtained
device
AC
peak-to-peak voltage of
working
section
at
flyback. Small SCRs
operate
rating
defective
warm.
other
words
heat
will show a rapid increase
SCRs
If
the
SCR or
it
drastically changes characteristics when
the component
Operating
and
TRIACs typically do
on the case
is generally
voltage
good
indication of
by
looking
is
used
line
power,
voltage
in a television horizontal
least
400 to 500 volts to
from a 24 volt B + supply
of 50 volts
not
can
at
in. For example, if
the
of
at
used
or
more.
the
and
TRIACs
TRIAC
with a heat
Voltage
as
do capacitors. Furthermore, their working
listed in
often be determined
rated
the
operating voltage of
device
least
must
the
line. This requires a device having a
400 volts.
withstand
in hold down circuits, for example, typically
become leaky only when
is suspected of being
gun.
A
in
leakage
not
the
parts
voltage of
the
SCR
be able to
output
and
as
it
becomes warmer.
Of
An
SCR
have their working voltage
list
of
the
by
one of
the
SCR
the
or
TRIAC
withstand
An
SCR used in
section
the
usually have a working voltage
must
reverse voltage from
"thermal",
it
"thermal"
Or
TRIAC
instrument.
the
or
TRIAC
circuit
is used
the
have a
becomes
following
that
to
the
regulator
rating
they
SCR or
The
can
be
the
switch
full
rated
of
the
The
best
way to determine
is
to
cross
the
device over
guide
or
you
for semiconductors. The working voltage of
TRIAC
are
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com
is
equal to or higher
testing.
the
operating voltage
to a substitute
than
the
15
of
an
SCR
type
using a
the
working voltage of
substitution
substitute
or
TRIAC
the
SCR
device
There are occasions when
in a
substitution
guide
following procedure, you
below
that
of
its
rated
the
SCR
and
no circuit voltages are available.
can
test
voltage without fear of
from applying too much voltage.
To
test
an
SCR
or
TRIAC
a.
Set the
APPLIED
volt range. This is
at a potential
VOLTAGE switch on
the
lowest
TRIACs.
b.
Test
the SCR or
sections on
c.
If
performed,
"Testing
the
device does
increase
voltage range.
are 25, 50, 100, 200,
TRIAC
SCRs"
not
the
Standard
...
, 1000 volts in 100 volt increments.
test
applied
working voltages for SCRs and
or
TRIAC
the
standard
following
or
on
"Testing
good when
voltage
SCR or
below
voltage
the
to
be
tested
is
not
listed
With
TRIAC
damaging
its
rated
the
at a potential
the device
voltage:
Z-Meter to the
range
for SCRs
procedures given in
TRIACs".
the
to
the
"turn-on"
next
test
standard
TRIACs
the
25
and
the
is
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com
16
+
3J.V9
300HJ.V.J
300NV
l'l
It
lJ
(\J
It
lJ
~
ro
et::tD
(I)
...
~i\J
~~
0 0 0
'-~-=---
.--
'-
~
,.--E.~-----
:.:
Nl{)
Cl::
.-'
-
'--f-~--
r
-,
0
-,
0
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com
SCHEMATIC
REFERENCE
PART
NUMBER
DESCRIPTION
R1
R2
R3
CR1
CR2,3
NOTES:
1 _
All
resistances in
2 . Board interconnection
ohms_
D denotes a single push-
Qden
otes wire soldered to
14C1-680
14C1
-152
14C11-183
16G18
50C5-2:A
25G379
20G21
26G124
25A377
25A378
39G196
68A14-8
68A14-11
68A14-12
notes
:
on
type connecto r_
PC
board .
Resistor, carbon,68 OHM , 1/4W
Resistor, carbon, 1.5K, 1
/4W,5%
Resistor , carbon, 18K,2W, 10%
Diode, Silicon, 1.0 Amp
Diode, 1N4148
Switch, momentary-push
LED,Indicator with resistor
Connector , BNC
Switch, pushbutton-4 station
Switch, pushbutton-push-on/off
Complete Test Lead
E-Z
Hook test clip, red
E-Z
Hook test clip, black
E-Z
Hook test clip, blue
odenot
3 . All
E·Z
Form
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com
es
mol
ex
connection
the pin number of the
co
ntrols, jac
Hook Is a registered trademark ol
ks,
and displays
SEN
. Numbers inside
plug-i
n connector.
on
exterior of unit are shown with box around the name.
E-Z
Hook, Division
or
along side indicate
ol
Tektest, Inc.
CORE
3200 Sen core Drive, Sioux Falls, South Dakota
3508
57107
Printed
in
U.S.A.
Artisan Technology Group is your source for quality
new and certied-used/pre-owned equipment
• FAST SHIPPING AND
DELIVERY
• TENS OF THOUSANDS OF
IN-STOCK ITEMS
• EQUIPMENT DEMOS
• HUNDREDS OF
MANUFACTURERS
SUPPORTED
• LEASING/MONTHLY
RENTALS
• ITAR CERTIFIED
SECURE ASSET SOLUTIONS
SERVICE CENTER REPAIRS
Experienced engineers and technicians on staff
at our full-service, in-house repair center
Instra
Remotely inspect equipment before purchasing with
our interactive website at www.instraview.com
Contact us: (888) 88-SOURCE | sales@artisantg.com | www.artisantg.com
SM
REMOTE INSPECTION
View
WE BUY USED EQUIPMENT
Sell your excess, underutilized, and idle used equipment
We also offer credit for buy-backs and trade-ins
www.artisantg.com/WeBuyEquipment
LOOKING FOR MORE INFORMATION?
Visit us on the web at www.artisantg.com for more
information on price quotations, drivers, technical
specications, manuals, and documentation
Loading...