Tektronix THM550 User manual

+a
B=3
Instructions
Tektronix
THM
550,
THM
560
&
THM
565
TekMeter™
070-8840-01
This
document
applies
to
firmware
version
2.00
and
above.
Please
check
for
change
information
at
the
rear
of
this
manual.
Second Edition: September 1994

Copyright © Tektronix, Inc. 1993, 1994. All rights reserved. Licensed software
products are owned by Tektronix or its suppliers and are protected by United
States copyright laws and international treaty provisions.
Use, duplication, or disclosure by the Government is subject to restrictions as
set forth in subparagraph (c)(1)(ii) of the Rights in Technical Data and
Computer Software clause at DFARS 252.227-7013, or subparagraphs (c)(1)
and (2) of the Commercial Computer Software — Restricted Rights clause at
FAR 52.227-19, as applicable.
Tektronix products are covered by U.S. and foreign patents, issued and
pending. Information in this publication supercedes that in all previously
published material. Specifications and price change privileges reserved.
Printed in the U.S.A.
Tektronix, Inc., P.O. Box 1000, Wilsonville, OR 97070-1000
TEKTRONIX and TEK are registered trademarks of Tektronix, Inc.
TekMeter is a registered trademark of Tektronix, Inc.
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WARRANTY
Tektronix
warrants
that
this
product
will
be
free
from
defects
in
materials
and
workmanship
for
a
period
of
one
(1)
year
from
the
date
of
shipment.
If
any
such
product
proves
defective
during
this
warranty
period,
Tektronix,
at
its
option,
either
will
repair
the
defective
product
without
charge
for
parts
and
labor,
or
will
provide
a
replacement
in
exchange
for the
defective
product.
In
order
to
obtain
service
under
this
warranty,
Customer
must
notify
Tektronix
of
the
defect
before
the
expiration
of
the
warranty
period
and
make
suitable
arrangements
for
the
performance
of
service.
Customer
shall
be
responsible
for
packaging
and
shipping
the
defective
product
to
the
service
center
designated
by
Tektronix,
with
shipping
charges
prepaid.
Tektronix
shall
pay
for
the
return
of
the
product
to
Customer
if
the
shipment
is
to
a
location
within
the
country
in
which
the
Tektronix
service
center
is
located.
Customer
shall
be
responsible
for
paying
all
shipping
charges,
duties,
taxes,
and
any
other
charges
for
products
returned
to
any
other
locations.
This
warranty
shall
not
apply
to
any
defect,
failure
or
damage
caused
by
improper
use
or
improper
or
inadequate
maintenance
and
care.
Tektronix
shall
not
be
obligated
to
furnish
service
under
this
warranty
a)
to
repair
damage
resulting
from
attempts
by
personnel
other
than
Tektronix
representatives
to
install,
repair
or
service
the
product;
b)
to
repair
damage
resulting
from
improper
use
or
connection
to
incompatible
equipment;
or
c)
to
service
a
product
that
has
been
modified
or
integrated
with
other
products
when
the
effect
of
such
modification
or
integration
increases
the
time
or
difficulty
of
servicing
the
product.
THIS
WARRANTY
IS
GIVEN
BY
TEKTRONIX
WITH
RESPECT
TO
THIS
PRODUCT
IN
LIEU
OF
ANY
OTHER
WARRANTIES,
EXPRESSED
OR
IMPLIED.
TEKTRONIX
AND
ITS
VENDORS
DISCLAIM
ANY
IMPLIED
WARRANTIES
OF
MERCHANTABILITY
OR
FITNESS
FOR
A
PARTICULAR
PURPOSE.
TEKTRONIX’
RESPONSIBILITY
TO
REPAIR
OR
REPLACE
DEFECTIVE
PRODUCTS
IS
THE
SOLE
AND
EXCLUSIVE
REMEDY
PROVIDED
TO
THE
CUSTOMER
FOR
BREACH
OF
THIS
WARRANTY.
TEKTRONIX
AND
ITS
VENDORS
WILL
NOT
BE
LIABLE
FOR
ANY
INDIRECT,
SPECIAL,
INCIDENTAL,
OR
CONSEQUENTIAL
DAMAGES
IRRESPECTIVE
OF
WHETHER
TEKTRONIX
OR
THE
VENDOR
HAS
ADVANCE
NOTICE
OF
THE
POSSIBILITY
OF
SUCH
DAMAGES.

Service Assurance
If
you
have
not
already
purchased
Service
Assurance
for
your
TekMeter,
this
valuable
opportunity
is
still
available.
Advantages
@
Conveniently
arrange
lifetime
repair
and
calibration
support.
©
Priced
well
below
the
cost
of
a
single
repair
or
calibration.
@
Tektronix
metrology
expertise
worldwide
will
expand
your
internal
resources.
Repair
Protection
provides
post-warranty
repair
support
whenever
needed.
You
may
purchase
up
to
three
years
of
Repair
Protection.
Calibration
Services
provide
annual
calibration
of
your
TekMeter,
standards
compliance
and
required
audit
documentation,
recall
assurance,
and
reminder
notification
of
scheduled
calibration.
Calibration
Services
begin
at
the
end
of
your
first
year
of
ownership,
and
you
may
purchase
up
to
five
years
of
support.
Purchase
Repair
Protection
or
Calibration
Services,
or
both,
to
meet
your
needs.
You
can
have
confidence
that
your
TekMeter
investment
is
protected.
To
order
Service
Assurance,
please
contact
your
Tektronix
representative
with
the
information
below.
Service
Assurance
may
not
be
available
in
some
locations
outside
the
United
States
of
America.
@
Name
®
Repair
Protection
(1,
2,
or
3
years)
@
Company
®
Calibration
Service
(1,
2, 3,
4,
or
5
years)
®
Address
®
Date
of
Purchase
@
City,
State,
Postal
Code
©
Instrument
Serial
Number
®
Country
@
TekMeter
Model—THM
550,
THM
560
or
®
Phone
THM
565
@ VISA/MC and expiration
date, or purchase order number
e- 3
Bg
Table
of
Contents
General
Safety
Summary
.............c.eccccececec.
QUORWIEW.
8
caikaia
sini
sie
bP
yee
ea
Gee
eas
ba
eens
awe
eceuel
Getting
Started
00...
0...
ccccccsscscccccececuceccces
Installing
Batteries
#3
..sch.06
cbcetne
beeen
enon
ds
cesta,
PAUSE
OSE
sa
octeae
hazel
Ru
ae
keetdsiyyrs
8
dat
acess
tat
cos
tc
Current
Measurement
..............0.0.0.000--0......
Max/Min
Values...
20.00...
0c
cece
cece
cece.
HONG
Wales
so
esas
oa
heer
eycke
saat
nuded
45
eo
deacnce
Locwe@ee,
DMM
MONS
55.235
45-40
seer
a
Sco
wiitact
v-neck
das
thee
a
cues
PROVES
focactshapin
3259
cc
inurs
Suge
Doad
sqbecahuelstion
snd
dios
Scope
Operations
..........
0...
ccc
cececcececeusecccs
sii
Tiemann
eae
aceyeremoed
Tah
y
cep
Using
Channel
2
(THM
560
and
THM
DOS)!
odsdi
hs
G4
ga
edith
Positioning
Waveforms
.................0.0.0.000-....
AISI
CURSOS
iris
ig
natnaie
tts
iste
weitere
hacduion
pec
eye
TMG
BOMG
pei
eit
Auae
tu
wert
aria
uch
Waele
a4
ane
homed
RUIN
TOE
ea
als
acatese
aac
oss
ca
tee
tae
Pin
asa
into
THM 550, THM 560. and THM 565 TekMotar Incieatinne

Table of Contents E- = |
Scope Menu Tree
General Safety Summary
Scope Main Menus ........... 00.00 cece cece eee eee 28 ::
Operation Mode .......... 0... ce cece eee eee 29 & a
Measure Modes .......... 00.20. cece cee eee eee 30 E '
Triptit. MOdeS\ ei. eee ooo ee eles gs eS Le Se SIE es 3] ~ai Review the following safety precautions to avoid injury and prevent
Acquire Modes ........ 0.00. ec eee ece eee eeees 33 K ‘ a damage to this product or any products connected to it.
: a.
TIERCE ACINS perenne Seba nator abe Only qualified personnel should perform service procedures.
Scope Sto/Rec Menu ............. cece eee eee eee aes 37 i
Utility NEMS sac ciee Soe aceite see eeiee sich nate 33 mig
Scope Applications ........... ccc ce cree ccc ccceeceeres 40 A Injury Precautions
Detecting Line Disturbances ............. 0.0000 eee eee 40 ) a jury
Displaying PWM Motor Drive Waveforms (THM 565) ...... 42 E ade ; .
Three Phase Voltage (THM 560 and THM 565) —¥ Avoid Electric Overload
Delta (A) Configuration ........... 0... eee eens 43 = nis wvGial elbstnerelocoe him hasaaG@e
‘ae ; ot apply a voltage to a
hace Phase: Voltage eA so end THM 56>) a terminal that is outside the range specified for that terminal.
Wye (Y) Configuration ....... 2.0... cece eee eee ees 45 a
Transformer Harmonic Derating Factor (THDF) ........... 47 all
Measuring True Power (THM 560, THM 565) ............. 48 =: Do Not Operate Without Covers
Appendix
A:
Specifications
.......+--.+ee0e
eee
eeeee
49
~
a
To
avoid
electric
shock
or
fire
hazard,
do
not
operate
this
product
Appendix B: Optional Accessories .........-+eeeeeeeee F 57 By with covers or panels removed.
Appendix C: Troubleshooting .........-..eeseeeeeceees 59 oe aac
Instrument Problems ...........0000 0000 e eee e eens 59 | Do Not Float Outside Limits
Reducing
Noise
PAChUD.
gi
cndce
da
pupae
vie
swine
canes
”
a
Do
not
apply
a
potential
to
any
input,
including
the
common
input,
Appendix D: Replaceable Parts ........escecceescscees 61 - | that varies from ground by more than the maximum rating for the
a product.
-- 4
a eT Do Not Operate in Explosive Atmosphere
a To avoid injury or fire hazard, do not operate this product in an
~ aj explosive atmosphere.
Product Damage Precautions
a | Use Proper Power Source
es
=
Do
not
operate
this
product
from
a
power
source
that
applies
more
a than the voltage specified.
ii
THM
550,
THM
560,
and
THM
565
TekMeter
Instructions
a
|
THM
550,
THM
560,
and
THM
565
TekMeter
Instructions
1

General Safety Summary
Do Not Operate With Suspected Failures
If you suspect there is damage to this product, have it inspected by
qualified service personnel.
Do Not Leave Exposed to Sunlight
Do not store or leave this product where the LCD display will be
exposed to direct sunlight for long periods of time.
Safety Terms and Symbols
Terms in This Manual
These terms may appear in this manual:
WARNING. Warning statements identify conditions or practices that
could result in injury or loss of life.
>
CAUTION. Caution statements identify conditions or practices that
could result in damage to this product or other property.
>
Terms on the Product
These terms may appear on the product:
DANGER indicates an injury hazard immediately accessible as you
read the marking.
WARNING indicates an injury hazard not immediately accessible as
you read the marking.
CAUTION indicates a hazard to property including the product.
2 THM 550, THM 560, and THM 565 TekMeter Instructions
E-3
| |
E-3
E34
E-¥
B-a
| er
pane
aa ae
a og i
}
}
if ae
i / t
vv 6s
General Safety Summary
Symbols on the Product
The following symbols may appear on the product:
4 © AN ia
DANGER
Protective
Ground
ATTENTION
Double
High
Voltage
(Earth)
Terminal
Refer
to
Insulated
Manual
Certifications and Compliances
Compliances
Consult
the
product
specifications
for
IEC
Installation
Category,
Pollution
Degree,
and
Safety
Class.
THM
550,
THM
560.
and
THM
565
TekMeter
Instructions
3

Overview
The THM 550, THM 560, and THM 565 TekMeters provide you
with the features of a complete digital multimeter (DMM), and in
addition, give you the power of a scope, all in a small portable
package that is intuitive and simple to use.
The DMM provides true RMS AC and DC voltage readouts,
resistance readouts, continuity testing with an audible signal, and a
diode test mode. AC and DC current can be measured using an
optional current probe. Additional DMM functions and readouts
include a hold feature to freeze the display, min and max readouts to
show how a signal has varied, and the instantaneous variation from
the last held value (A Hold).
The oscilloscope has the world’s first Autoranging mode that
automates operation completely, so that it always displays a usable
signal without operator intervention. When desired, automatic
operation can be overridden by using any control. In manual mode,
the oscilloscope provides general oscilloscope coupling, triggering,
and acquisition modes. Special preconfigured modes instantly set up
the oscilloscope for motor testing, transformer THDF measurements,
power line monitoring, and power measurements.
Waveforms, settings, and displays can be saved for future reference
and use. Test setups can be saved to automate and recall test
procedures in the field. Waveforms and screens can be saved in the
field to compare them with field samples, and, with the optional
Communications Adapter, transferred to a PC for customer reports or
to monitor trends.
Whether your application is in field service or on the bench, the
THM 500 series instruments are light, simple, portable, and versatile
enough to meet your needs.
THM 550. THM 560. and THM 565 TekMeter Instructions
ARRAD TT
THAR
he a. ee ae a. a. a. » be
mh +
A a
ro
r-
t-
ae ae ee a tT re TT
Be
~
aoe!
i -
i
Md
wy
Getting Started
Installing Batteries
The low battery indicator appears in
l the upper right of the display when
the battery voltage gets low. With
alkaline batteries, you have about a
half hour of battery life. With NiCd
batteries, you have only about 30
seconds left.
(6) size AA batteries.
Maximum life alkaline or
long-life NiCd batteries
are recommended.
THM 550, THM 560, and THM 565 TekMeter Instructions 5

Getting Started
Adjust Offset
Before performing any measurements using the Scope mode, adjust
the offset setting. This is especially important if the THM 500 series
instruments has been left without a power source for several hours.
NOTE. Pressing the ON/OFF button without batteries installed
instantly uncalibrates the offset settings.
SELECT
oO
Z=z>r> ama
Vv
OO
=x
VACWRP OAM
PCr SUOHAS ADm>Sc mMe2ono0 vvvvivvvyvyy
Display Use direction buttons to point to the channel offset selection. Adjust Select.
menu, the offset for each channel.
The offset is set at the factory at room temperature. If operating the
THM 500 series instruments at extreme temperatures, perform the
offset adjustment to ensure proper scope measurements.
6 THM 550. THM 560. and THM 565 TekMeter Instructions
DMM Operations
Meter Bar shows
the measured
value in a visual
form. numerically.
Readout shows the
Min/Max Readouts show the
O-OLO |
measured value extent of variation of the ie cae
signal
over
time.
tha
clonal
g
variation.
TEKMETEF v4 Ec aac
1.300
Vm)
pes
now
;
=
or
|
ONO
to
display
ec
oon
N=
CJ)
and
operate
the
we
=
DMM
menus.
| weren Yooc
ie) | score
POSITION: Seeeeen ONCE
te ih
a
O-O-0
RWV-AC
RANGE
me
Ororo
ic
AC)
mala
=
na
fel
Fe
AUTORANGE:
Range
selection
ae
=
Qn)
+
HOLD
pus BOTH
switches. Press
both for
Autorange.
j Tektronix
oud
ae
labels.
The METER/SCOPE button lets
you select between DMM mode
or scope mode.
BOSSOI>
a Controls set the
DMM display mode
according to the METER
HOLD button and readouts. The
button temporarily freezes the
display.
Note:
To
ensure
maximum
accuracy
in
DMM
measurements,
set
the
DMM
filter
for
the
line
frequency
used
in
your
location,
either
50
Hz
or
60
Hz.
See
DMM
Filter
on
page
16.
THM 550. THM 560. and THM SAS Tel-Mater Tnctrictinne —

DMM Operations J DMM Operations
AC/DC Volts Measurement a Current Measurement
a |
& a
Connect voitage probes to the
COM and DMM connectors.
Connect current probe to
DMM and COM connectors.
OMM COM CHi CH2
[eceeraree) Pees! eS}
600V rms max
DMM COM CH1 CH2
[ ES ere
600V rms max
100mV/A
10mV/A
OFF
Press if in Press to toggle between Read results. Adjust range only if
scope mode. AC or DC measurements. needed. Press both to ; ;
set to Autorange mode. Set switch on Use the menu to specify that you The readouts Adjust range only
current probe. have a current probe and match change to show if needed. Press
the scale factor of the current Amperes. both to set to
probe. Autorange mode.
8 THM 550, THM 560, and THM 565 TekMeter Instructions THM 550, THM 560, and THM 565 TekMeter Instructions 9

DMM Operations &— 4 DMM Operations
Max/Min Values ES Ohms and Continuity
»
-
oa
oy
w
Q
1))
BEEPERDON
OFF
weter werer()] ae Q Nn)
:
er score(y} | score[y} PORION camsone
(SV-AC 3
The
measurement
window
always
displays
the
instantaneous
value.
i:
Connect
Pressifin
Pressonceortwiceto
Press
Select
to
turn
continuity
beeper
The
variation
window
displays
the
maximum
and
minimum
values
E
'
J
probes
across
scope
show
desired
display.
on
or
off.
and the
difference
between the
max
and
min measurements.
“™
peat
a
mode.
circuit.
The
MAX
value displays
the
maximum
value
measured.
This
value
--g
only
changes with a
higher
measurement
value.
The MIN
value
displays
the
minimum
value
measured.
This
value
re
|
Diode Test
only changes with a lower measurement value.
The MAX-MIN value is the measurement result of subtracting the
MIN value from the MAX value. | eee |
i merer(} VOUS fn}
ee ee a ge ee ee ee eo oS nn, t score [Ay] Posmon Cara: WAVEFORM
NOTE. Exceeding the measurement capability of a manual range - al
setting stops the MIN, MAX, and MAX — MIN measurements. j
Changing
the
range
restarts
these
measurements.
|
ee
at
en
-- | Press if in Press to display Check forward voltage © Check reverse voltage
Pressing the SELECT button resets the MAX, MIN, and MAX—MIN scope diode test readout. drop <2 V. drop > 2V (infinity
values. &- | mode. readout).
The Hold and AHold values are explained on page 12.
10 THM 550, THM 560, and THM 565 TekMeter Instructions K-. ‘a@ THM 550, THM 560, and THM 565 TekMeter Instructions 11

DMM
Operations
Bg
Eq
|
Hold
Values
a
METER yours aM) bE HOLD
Posi cuasone! FORM RUNS
seore[%y) "ene woncee foto
COCO mm
Press
the
Hold
button
to
freeze
the
Hold
shows
reading
at
last
hold.
display.
werer(D) X08 as) He ow
score [A,] POSITION! CURSORS waar a
COCO wm
Press the Hold button again to
restart the display.
AHold shows the difference from last held value o,
and the present measured value.
12 THM 550. THM 560. and THM 565 TekMeter Instructions
DMM Operations
DMM Menus
SELECT SELECT
Press SELECT if the
message “PRESS
SELECT TO CHOOSE”
is displayed.
Display menus.
Use direction buttons to navigate through
the menus.
If
“PRESS
SELECT
TO
CHOOSE”
appears,
the
SELECT
button
must
be
pushed
to
make
the
selection.
If
the
message
does
not
appear,
THM
500
series
instruments
automatically
changes
to
the
chosen
selection.
THM 550. THM 560. and THM SAS Tel Matar Tractor atiane on

DMM
Operations
B—
Jy
DMM
Operations
DMM
Menu
Tree
-
3
DMM Main
Menus
The
following
menu
tree
provides
a
quick
look
at
the
available
|
r
|
mall
DMM
menus,
helping
you
to
locate
specific
menu
choices.
Each
;
RESET
ALL
DMM
menu
is
described
in
the
following
pages.
|
==
r
PROBES
FILTER
|
STO/REC
LIGHT
UTILITY
CONTRAST
—
ADJUST
|
el
GRATICULE
NONE
;
PRINT
CROSSHAIR
.
a
=
LIGHT
turns
on
the
display
backlight
(THM
565
only).
GRID
RESET
ALL
TIMEOUTS
POWER
OFF
PRINT
sends
the
current
DMM
display
to
a
connected
printer.
PROBES
NORMAL
BACKLIGHT
The
printer
must
use
Epson-style
commands
and
be
connected
imV=1A
STATUS
VIEW
through
the
optional
THMCOM1
Communications
Adapter.
If
a
1OmV=1A
PRINT
printer
is
not
connected,
press
MENU
ON/OFF
to
cancel.
ea
ADJ
OFFSET
CH1
OFFSET
W=1A
CH2
OFFSET
RESET
ALL
restores
all
settings
to
factory
default.
Display
FILTER
50
Hz
BAUD
4200
rs
a
contrast
and
all
saved
settings,
waveforms,
and
screens
are
60
Hz
9600
|
preserved.
STO/REC
STO
SCREEN
DIAGNOSTIC
pera
EE.
-¥
=
PROBES
lets
you
select
between
using
voltage
probes
(normal)
REC
SCREEN
CYCLE
and
current
probes.
See
page
16.
iT
a
; :
set
Asie
TURN
ON
eae
=
E
|
@
FILTER
lets
you
choose
the
proper
filter
for
your
environment
to
REC
SETUP
DATE/TIME
SET
DATE
-
#
q
increase
your
measurement
accuracy.
See
page
16.
SET
TIME
m
STO/REC
saves
display
screens
and
instrument
settings
to
E-
=
|
memory
or
recalls
them.
See
page
17.
P
=
UTILITY
lets
you
change
certain
instrument
characteristics.
=
“
|
These
settings
are
generally
set
only
once.
The
Utility
menus
are
;
identical
when
accessed
through
either
the
DMM
or
scope
menus.
E-
aj
See
page
38
for
descriptions
of
these
menus.
--
4
4
ks
14
THM
550.
THM
560.
and
THM
565
TekMeter
Instructions
=
|
THM
550,
THM
560,
and
THM
565
TekMeter
Instructions
15

DMM Operations
16
Probes
LIGHT
PRINT
RESET ALL
PROBES ——————— NORMAL
FILTER ImV=1A
STO/REC 10mV=1A
UTILITY 100mV=1A
1V=1A
The Probes menu lets you specify whether a voltage (normal) or
current probe is used. If using a current probe, specify the scale
factor.
Filter
LIGHT
PRINT
RESET ALL
PROBES
FILTER —————----— 50Hz
STO/REC 60Hz
UTILITY
The Filter menu lets you select what AC line noise to reject during
DC measurements.
THM 550, THM 560, and THM 565 TekMeter Instructions x5
E--3
B- 4
a |
| or |
&-4
-- 3
—~
4.
E43
a
E- ¥
DMM Operations
DMM Sto/Rec Menu
LIGHT
PRINT
RESET ALL
PROBES
FILTER
STO/REC -—------—- STOSCREEN -~———————— SCAN1 (*)
UTILITY REC SCREEN °
PRNT SCRN SCRNB (1)
STO SETUP CLEAR ALL
REC SETUP
SCRNI1 (1)
SCRN8 (1)
CLEAR ALL
SCRNI1 (-~)
SCRNB (1)
— SET1()
e
SETS ()
CLEAR ALL
SET1()
SETB ()
CLEAR ALL
The DMM Store/Recall menu allows you to store and recall entire
screen displays and instrument setups. Saved screens can be sent to a
printer directly. The number of memory locations available for each
type of information to store is dependent on the THM 500 series
instruments model. See memories on page 53. A check appears next
to each location containing saved data.
THM 550, THM 560, and THM 565 TekMeter Instructions 17

DMM Operations
18
THM 550. THM 560. and THM 565 TekMeter Instructions
Scope Operations
Run/Hold and The SELECT button selects
acquisition among the items displayed in the
mode display. upper right corner of the display.
TEKMETEIR Thuto Hangrig Scope.
=S=
(RUN SAMPLE
©
oworr Press the MENU
ON/OFF button to
display and
operate the scope
i Se O
' v
POS Iv menus.
50% _ <>
| AUTORANGE
ON/OFF
Qf) + fro | Tektroni musncons
7
Posmow cunsone/ “ower | aN, |
VOLTS:
ACC
TRIGGER ON/OFF
OOOO Je
ON/OFF. Display Controls set © The HOLD
the scope display button stops
mode according to the and restarts
SCOPE labels. Some _ the display.
buttons toggle
between two modes.
Multifunction buttons and associated
labels.
The METER/SCOPE button
selects between scope mode or Press the ¥ and buttons together to
DMM mode. set the scope to Autorange mode.
THM 550, THM 560, and THM 565 TekMeter Instructions ; 19

Scope Operations
Using Channel 1
SELECT
SELECT PCH! CH2 MR = A
MENU 'y
ON/OFF
oO = AUTORANGE
ON/OFF
(PUSH BOTH)
Connect COM and Pressifin Select CH1. (If the Select labelis Press ifnot Press both
CH1 probes across DMM not displayed, press the already on. buttons
signal
source.
mode.
POSITION/SCALE
button.)
together
to
autorange.
Using Channel 2 (THM 560 and THM 565)
SELECT
SELECT CH1 >CH2 MR =
Bae
MENU WAVEFORM
ON/OFF
=)
Connect
COM
and
Press
if
Select
CH2.
(Ifthe
Select
labelis
Press
ifnot
Press
both
CH2
probes
across
inDMM
___
not
displayed,
press
the
already
on.
buttons
signal
source.
mode.
POSITION/SCALE
button.)
together
to
autorange.
20
THM
550,
THM
560,
and
THM
565
TekMeter
Instructions
ro
-- gj
K- 4
Scope Operations
Positioning Waveforms
a
v
POS
50% <>
a
Yepe 2/1) How
POSITION CURSORS/ WAVEFORM = RUN/
SCALE TRIGGER ON/OFF HOLO
Press
to
display
position
label.
Adjust
vertical
position
Adjust
horizontal
position
of display. of display (horizontal
position of trigger event).
See the example below.
Trigger Event Trigger Event
SELECT DbCH1 CH2 MR
RUN SAMPLE SELECT >CH1 CH2 MR
+
MANUAL by POS
CH1 DC 100mvV 500ns 50% <>
A horizontal position of 50% means the
trigger event is at center screen.
A horizontal position of 20% means the
trigger event is two divisions from the left
edge of the screen.
NOTE. A trigger event occurs when the waveform crosses the trigger
threshold level. When this occurs, the waveform is displayed. See
Triggering on page 24.
NOTE. The Autorange mode is exited anytime a change to the scale
factors, position, or triggering is made by the user.
THM 550, THM 560, and THM 565 TekMeter Instructions 21

Scope Operations
Scaling (Sizing) Waveforms
OOmvV
a
¥
SCALE
Sps <>
VOLTS:
AC/DC
an)
POSTION’ CURSORS/ WAVEFORM
SCALE
Press to display Scale
label.
TRIGGER ON/OFF
Press to change volts/division scale
factor.
Press to change
seconds/division scale
factor.
RUN SAMPLE
Horizontal scale set to 5,4 per division.
Vertical scale is set to 200mvV per division.
22
>CH1 CH2 MR
SELECT
?>CH1
CH2
MR
RUN
SAMPLE SELECT
a
Horizontal scale set to 500ns per division.
Vertical scale is set to 100mV per division.
NOTE.
The
Autorange
mode
is
exited
anytime
a
change
to
the
scale
factors,
position,
or
triggering
is
made
by the
user.
THM
550.
THM
560.
and
THM
565
TekMeter
Instructions
Scope Operations
Using Cursors
QM)
CURSORS/ WAVEFORM
TRIGGER ON/OFF
Press to display Cursor label
and cursor bars.
Display and position the
voltage cursors.
RUN SAMPLE SELECT CURSOR Db1 2
+
MANUAL
AV= _4.10V
Voltage cursors displayed. AV measures
the voltage between the cursors.
CY) av- 4.10V a A
v
SELECT CURSOR
Pi
2
SELECT
a
vy
cur 1
<>
Press Select to toggle between cursor 1
(CUR 1) and cursor 2 (CUR 2).
AT= 25.0ms 1/AT= 40.0Hz
qe
Display and position the time cursors.
RUN SAMPLE SELECT CURSOR D1 2
+
MANUAL CUR
AT= 25.0ms i/AT= 40.Q0Hz
Time cursors displayed. AT is the time
measured between cursors. 1/AT is the
frequency measurement.
THM
550,
THM
560,
and
THM
565
TekMeter
Instructions
23

Scope Operations
Triggering
TRIGGER ON PCH1 CH2
a
v
TRIG
<>
QM) DF HOLD
CURSORS) WAVEFORM = RUN
TRIGGER ONOFF HOLD
Press to display Trigger label and trigger bar. Select the channel to use as the trigger source.
Adjust the trigger level.
RUN SAMPLE TRIGGER ON DCH1 CH2
+
Trigger Point
This example shows the trigger source set to channel 1 and the trigger event occurring when the
rising edge of the signal exceeds 400 mV. The actual trigger point is the intersection of the trigger
level (400 mV) and the horizontal position (50%).
NOTE. The Autorange mode is exited anytime a change to the scale
factors, position, or triggering is made by the user.
24 THM 550. THM 560, and THM 565 TekMeter Instructions
~—
cake,
4
Scope Operations
Waveform ON/OFF
SELECT pbCH1 CH2 MR
Qi)
CURSORS/ WAVEFORM AUN,
TRIGGER _ ON/OFF HOLD
Press to turn waveform
displays on or off.
Press to select which display the WAVEFORM ON/OFF button affects.
CH{1 is the channel 4 scope input.
CH2 is the channel 2 scope input.
Mis the math waveform display last chosen (CH1-CH2 or CH1+CH2).
Ris the last waveform stored in memory. See page 37.
RUN/HOLD
HOLD SAMPLE RUN SAMPLE
an)
HOLD
QM)
DR
HOLD
CURSORS/
WAVEFORM
AUN
TRIGGER
HOLD
CURSORS) WAVEFORM RUNY
TRIGGER ON/OFF HOLD
Press to start (run) the display, starting
the acquisition of the waveform.
Press to freeze (hold) the display,
stopping the acquisition of the waveform.
Using Run and Hold does not affect the operation of the Autorange
feature. Use the RUN/HOLD button to arm the scope while waiting
for a trigger event when using single-shot trigger (see page 35).
THM 550, THM 560, and THM 565 TekMeter Instructions
25

Scope Operations
Scope Menus
SELECT
=
)
szoxnver
=
ACQ
TRI
STO
UTI
Press Select if the
message “PRESS
SELECT TO CHOOSE”
is displayed.
Display menus. Use direction buttons to navigate
through the menus.
If “PRESS SELECT TO CHOOSE” appears, the SELECT button
must be pushed to make the selection. If the message does not
appear, THM 500 series instruments automatically changes to the
chosen selection.
26 THM 550, THM 560, and THM 565 TekMeter Instructions
shee
vane,
Ka
Scope Operations
Scope Menu Tree
The menu tree below provides a quick look at the available scope
menus, helping locate specific menu choices. Each scope menu is
described in the following pages.
LIGHT TRIGGER MODE AUTO
NORMAL
PRINT SINGLE
SLOPE NEGATIVE
RESET ALL POSITIVE
OPERATION MANUAL MOTOR OFF
AUTORANGE ON
LINE TEST
MOTOR TEST STO(REC STO SCREEN
MEASURE NONE REC SCREEN
TIMING PRINT SCRN
VOLTS/DIV
vour STO SETUP
POWER REC SETUP
INPUT CHICPLG DC Srv NE
rt REC WAVE
Sones lk UTILITY CONTRAST ADJUST
on GRATICULE NONE
CROSSHAIR
CH1 PROBE NORMAL GRID
ria TIMEOUTS POWER OFF
MU BACKLIGHT
100mV=1A
1V=1A STATUS VIEW
CH2CPLG NEGATIVE PRINT
POSITIVE ADJ OFFSET CH1 OFFSET
CH2 INVERT OFF CH2 OFFSET
0 BAUD 1200
MATH OFF 9600
CHI - CH2 DIAGNOSTIC INTERNAL
CH1 + CH2 DISPLAY
CYCLE
ACQUIRE = SAMPLE TURNON NORESET
SPIKE DETECT soe
SMOOTH
DYNAMIC DSP DATE/TIME SET DATE
SET TIME
THM 550, THM 560, and THM 565 TekMeter Instructions 27

Scope Operations
28
Scope Main Menus
LIGHT
PRINT
RESET ALL
OPERATION
MEASURE
INPUT
ACQUIRE
TRIGGER
STO/REC
UTILITY
LIGHT turns on the display backlight (THM 565 only).
PRINT sends the current scope display to a connected printer.
The printer must use Epson-style commands and be connected
through the optional THMCOM1 Communications Adapter. If a
printer is not connected, press MENU ON/OFF to cancel.
RESET ALL restores all settings to factory default. Display
contrast and all saved settings, waveforms, and screens are
preserved.
OPERATION lets you choose the operation of the THM 500
series instruments. See page 29.
MEASURE lets you choose preconfigured test setups. See
page 30.
INPUT lets you select signal coupling and signal invert. Current
probe factors are set here. See page 31.
ACQUIRE lets you select how signals are digitally acquired. See
page 33.
TRIGGER lets you select the characteristics the trigger signal
must meet to cause a signal to display. See page 35.
STO/REC saves display screens, waveforms, and instrument
settings to memory or recalls them. See page 37.
UTILITY lets you change certain instrument characteristics.
These type of settings are generally set only once. See page 38.
THM 550. THM 560, and THM 565 TekMeter Instructions
be
ae
a
Scope Operations
Operation Mode
LIGHT
PRINT
RESET ALL
OPERATION ————--— MANUAL
MEASURE AUTORANGE
INPUT LINE TEST
ACQUIRE MOTOR TEST
TRIGGER
STO/REC
UTILITY
Operation Mode selects between instrument operation.
= MANUAL lets you set parameters directly; this prevents all other
parameters from automatically changing. Manual can be set
without using the menu by directly setting any parameter.
m™ AUTORANGE sets all parameters for displayed channels based
on the input waveform. Autorange can be set without using the
menu by pressing the & and V buttons together.
NOTE. The Autorange mode is exited anytime a change to the scale
factors, position, or triggering is made by the user.
= LINE TEST captures transient events, such as voltage spikes and
sags, on a power line. A dialog screen is displayed requesting line
quality parameters. See page 40.
= MOTOR TEST automatically sets the THM 500 series instru-
ments settings to 200V/div, Motor Trigger to On, and the
acquisition mode to Spike Detect. This is ideal for measuring
480V inverter output signals of a Pulse Width Modulated (PWM)
motor drive. See page 42.
THM 550, THM 560, and THM 565 TekMeter Instructions 29

1
Scope
Operations
=-—a
Scope
Operations
| Measure Modes Input Modes
:
LIGHT
|
oe
LIGHT
Eset
ALL
4
RESET
ALL
OPERATION
a
OPERATION
MEASURE
-——————
NONE
;
MEASURE
INPUT TIMING | a INPUT —---———— CH1 CPLG. ———_—-—---- D€
ACQUIRE VOLTS/AMPS — ACQUIRE CHI INVERT ——--—-——+ AC
TRIGGER CH1 PROBE GND
Head er = STO/REC cH2CPL@.
eal ROWER =a UTILITY CH2 INVERT \_ OFF
ene i MATH ON
Measure selects from several automated measurement displays. NORMAL
Ea imV=1A
= NONE turns measurements off. ; 10mV=1A
ma) 100mV=1A
= TIMING measures the period, frequency, and duty cycle (% of E--4 1V=1A
time the voltage is high) of the selected channel.
Sannin a —— bo
= VOLTS/AMPS measures the maximum, minimum, and x :
peak-to-peak voltage. Current is measured if using a current oer |
probe. E OFF
' : ON
= THDF measures RMS, peak-to-peak, and the THDF of the E—-4
waveform. See page 47. OFF
-—a CH1 - CH2
= POWER (THM 560 and THM 565 only) measures the RMS CH1 + CH2
current on channel | and the RMS voltage on channel 2. True - is
power and the Power Factor (PF) are calculated and displayed. | Input mode selections let you choose various actions to apply to the
See page 48. - | input signal.
™ CH! CPLG (and CH2 CPLG) specifies how the input channel is
E- 3 electrically coupled to the input of the THM 500 series
instruments.
ka DC coupling is direct connection.
E- 3 AC coupling removes the DC component of a signal.
E a GND coupling shows the common (not ground) potential.
® CHi INVERT (and CH2 INVERT) lets you display the signal
E-. qj “upside down.”
30 THM 550. THM 560, and THM 565 TekMeter Instructions © WR+ a= THM 550, THM 560, and THM 565 TekMeter Instructions 31

Scope
Operations
-E—a
Scope
Operations
= CHI PROBE lets you specify whether a voltage or current probe = a Acquire Modes
is used on channel 1. If using a current probe, the scale factor =z LIGHT
must be set to match the attached current probe. PRINT
a RESET ALL
NORMAL — Voltage input - | eerily
j : EASURE
1 mV = 1 A — Current input with a conversion factor of | INPUT
ACQUIRE —————--—- SAMPLE
Buea TRIGGER SPIKE DETECT
10 mV = f A — Current input with a conversion factor of | aw | null Sane ges
10mV/A.
100 mV = 1 A — Current input with a conversion factor of ACQUIRE specifies how sampling is performed and how the
100mV/A. = | waveform is displayed.
1 V=1 A — Current input with a conversion factor of 1 V/A. = SAMPLE (the default) takes one sample for each displayed
™ MATH (THM 560 and THM 565 only) determines the character- ka WaveroEnNcon
istics of the math waveform. The math waveform is displayed by - - m SPIKE DETECT takes many samples and displays the most
selecting M in the channel selection. —ai extreme sample; use this mode to capture glitches and spikes. _
OFF turns off the math waveform and is the same as using -—3
Waveform On/Off. ;
CH1-CH2 specifies the operation shown by the math |
waveform.
‘
=—a
CH1+CH2 specifies the operation shown by the math
waveform. = — ij
eis = SMOOTH takes many samples and displays a composite
=—i waveform, reducing apparent noise.
ne
Smooth acts as a low pass filter with the following characteris-
E— qj tics.
32
THM
550,
THM
560,
and
THM
565
TekMeter
Instructions
=
RY
ig)
THM
550,
THM
560,
and
THM
565
TekMeter
Instructions
33