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
~
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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