12-FUNCTION
DIGITAL
MULTIMETERS
. Th e
combination of large LCD
readout. annunciators for
all available ranges, and t he
number of
ava
ilable ranges
mak e th e
DM
25XL and
DM
27
XL di
git
al
multi
-
met er s easy to
use
for
most jobs, eliminating the
need to
carry
aro und a
case full of test in stru-
ments for d
iff
erent jobs.
Th e t w o m
et
ers, from
Beckman Industrial C orpo-
ration, provide 12 func tions
in one unit , and the annun-
ciators lessen the c hance
of using the wrong range.
Both units are 3 Y2-digit,
CIRClE 23 ON
FREE
INFORMATION CARD
0
.8%
-acc
u
racy
DMM
's
that feature 37 ranges, an
audible con t inuity beeper,
diode test, logic functions,
and tr ans ist o r h FE mea-
sure
ments
. To
conserve
battery life, auto-off is also
sta nda rd. The
DM
27XL
adds to those functions a
go/no
-go
test
on LED 's
and includes the ability to
measure frequency to 20
MHz, which is needed for
servic ing bo t h tel eco m-
munications and computer
equipment.
Both m odel s includ e a
built-in
TIL
logic probe that
detect s 20-ns pulses (2.4
volts high a nd 0 .7 volts
low). The two D
MM
's each
have
seve
n
resis
tance
ranges to 2000 megohms,
five capacitance ranges to
20
f.LF
, AC and DC current
measurement to 10 amps,
five VAC and five
VDC
ranges, and the ability to
test diodes and measure
transistor gain. The input
impedance is 10 megohm s.
The
DM
25XL and the
DM
2 7XL
dig
ita l m ult i -
meters have suggested re-
tail
prices
of $ 109 an d
$
129
,
respect
ively.-
Beckman
Industrial
Corporation
,
3883
Ruffin Road, San Diego,
CA
92123-18 9 8; Phone:
619-495-3200 .
PROTOTYPING
SYS-
TEM. Providing a co mplete
sys te m f
or
the develop-
ment of embedded control
app
l
ications,
the
R-5
35
proto
typing boa rd with R-
W
ar
efrom Rigel C
or
pora-
tion features efficient soft -
ware and o n- bo ard pro-
totyping co mpo nents in a
single integrated unit that's
designed to commu nicate
with a PC acting as host.
The R-535 uses the 80535
mi
cro
c
ont
roll
er, an
en-
hanced version of the pop-
ular Intel 8032 contro ller,
and can be us ed to develop
programs
for
the entire
8031
fami
ly
of
mi
cr
o-
controllers.
Th e on -b o a rd
ROM-
CIRClE 24 ON
FRE
E
INFORMATION CARD
based softw are includes an
op
era
t i ng
sys
t e m, a
monitor system. EPROM
burner software, and user-
access ible syste m-calls for
control and commun ication
suppo rt. The
host
-based
software is a menu-driven
i
nteg
rat ed env i ronm
ent
with an editor, assembler,
debu
gger
, an d PC
-to-
board communications .
The hardware co nsists
of pushbutt ons, dip sw itch-
HANDS-ON
TECHNICAL
SEMINARS
FOR PROFESSIONALS
"Servicing
the
Video
Laser
Disc
Player"
-EIA /CEG
"Hot-Air
Soldering
Techniques"
-Thomson
Consumer
Electronics
"Advanced
Digital
Circuitry
-
Digital
TV"
-Toshiba America, Inc.
"Troubleshooting
Tough
VCR
Mechanical
and
Electronic
Problems"
-
Tentel Corp.
and
Sencore, Inc.
"Microprocessor
Controls
-
Troubleshooting
Techniques
Using
the
Mitsubishi
Wide-Screen
Simulator"
-
Mitsubishi
Electronics
America
Courses
FREE
when
registered
at
the
Nat
ional
Profess
ional
Electro
nics
Convent
ion
August
5
-11
, 1991;
Nugget
Resort
,
Reno
NV.
Full
$230
Registration
(at
door)
includes:
•
All
Technical Training
Seminars
(
li
mited
seating
)
•
All
Management
and
Business
Seminars
•
Continuing
Education
units
for
all
seminars
attended
• Two Day Trade Sho w
•Head-to-head
Meetings
with
Manufacturers
'
National
Service
Managers
•
All
Sponsored
Meals
and
Functions
• NESDA /ISCET
Assoc
iation
Meetings
•Price
discounts
availa
bl
e for
pr
e·r
egi
st
ra
ti
on
Sponsored
by
the
National
Electronic
Sales
&
Service
Dealers
Association
and
t he
International
Society
of
Certi
fied
Electro
nics
Technicians
For
more
information
,
contact
NPEC '91
2708 W.
Berry
St. ,
Fort
Worth,
TX 76109-2356
(817) 921-9061; fa x (817) 921-3741
L
C
~
27