10/06
FORM #262-1
OPERATING INSTRUCTIONS
MODEL DM-2A
POCKET-PRO
®
DIGITAL MULTIMETER
ONE YEAR LIMITED WARRANTY
Sperry Instruments warrants that this Sperry instrument has been
carefully tested, inspected, and warranted for one (1) year from
the date of purchase by the original end user, provided the
instrument has not been misused, damaged due to negligence,
neglect or unauthorized repair, abused or used contrary to the
operating instructions. Instruments and proof of purchase in the
form of a legible copy or original of the sales receipt clearly
identifying the distributor, model number and date of purchase
must be returned to Sperry Instruments, Attention: Customer
Service Center, 2150 Joshua’s Path, Suite 302, Hauppauge, New
York 11788, postage prepaid for examination and verification of
manufacturing defect under warranty. Sperry Instruments shall be
the sole judge of such defect. The liability of Sperry Instruments
shall be limited to the repair or replacement at its sole option of
any defective product.
1) INTRODUCTION
The DM-2A is an innovative concept in digital multimeter
design. It is a miniature ultra-slim DMM which combines
the measurement capabilities of a 18 range, 5 function
digital instrument with the handiness and simplicity of a
pocket calculator. The DM-2A features the latest
developments in high-technology construction and
design. All the features of larger sized DMM’s are to be
found in the DM-2A. Autoranging, overload protection on
all ranges, auto polarity, audible/visual continuity
indication, sturdy ABS plastic case and much more. The
DM-2A is extremely easy to use. Two thumb operated
switches control all functions. The test leads are built into
the instrument and cannot be removed. They are always
there when you need them. A handy “booklet style”
carrying case which hold the instrument, test leads and
operating instructions is included, and allows the DM-2A
to be carried easily in your shirt pocket.
2) FEATURES
UL LISTED
…to both US and Canadian standards
18 RANGES, 5 FUNCTIONS
LIMITED ONE YEAR WARRANTY.
AUTO RANGING /MANUAL RANGING
SIMPLE OPERATION
CONTINUITY BUZZER
RANGE HOLD BUTTON
BUILT IN TEST LEADS
AUTO POWER OFF
3) SPECIFICATIONS
Display:
3
-1/2
digit liquid crystal display (LCD),
maximum reading
1
999 with automatic
sign and function annunciators.
Range
Selection:
Autoranging/Manual ranging.
Polarity:
Automatic (-) negative polarity
indication.
Overrange:
Most significant digit blinks
Low Battery
Indication:
The “B” is displayed when the battery
voltage drops below the operating
level.
Measurement
Rate:
2.5 times per second, nominal.
Operating
Environment:
0° to 40°C (32° to 104°F) Max RH
80% to 31°C, decreasing linearly to
50% RH at 40°C.
Storage
Temperature:
-20°C to 60°C (-4° to 140°F) at
80% relative humidity.
Power:
Two 1.5V button-type batteries
(IEC # LR-44, NEDA #1166A).
Sperry Part #B-6
Power
Consumption:
5mW typical.
Dimensions:
4
3
⁄
8
"H x 2
1
⁄
4
"W x
3
⁄
8
"D
(111.5mm H x 56mm W x 10.5mm D)
Weight:
Approx. 3.0 oz (86g) including
batteries and case.
Instrument complies with insulation category (over
voltage category II). Pollution degree 2 in accordance
with IEC-1010-1 Indoor use. If the equipment is used in a
manner not specified, the protection provided by the
equipment may be impaired.
4) PACKAGING
The DM-2A comes complete with two B-6 batteries, C-77
carrying case and form # 262 operating instructions.
DOUBLE INSULATION
WARNING:
TO AVOID ELECTRIC SHOCK DISCONNECT
MEASURING TERMINALS BEFORE REMOVING BACK COVER.
AVIS:
POUR EVITER LE CHOC ELECTRIQUE DEBRANCHER
LES BORNES DE MEAURE AVANT D’ENLEVER LE CAPOTAGE
ARRIERE.
WHEN SERVICING, USE ONLY SPECIFIED
“REPLACEMENT PARTS” OR EQUIVALENT.
5) SAFETY PRECAUTIONS
The following safety precautions must be observed to
insure maximum personal safety during the operation at
this meter.
1.
Read these operating instructions thoroughly and
completely before operating your Pocket Pro. Pay
particular attention to WARNINGS which will inform
you of potentially dangerous procedures. The
instructions in these warnings must be followed.
2.
Always inspect your meter, test leads and accessories
for any sign of damage or abnormality before every
use. If any abnormal conditions exists (e.g. broken test
leads, cracked cases, display not reading, etc.), do not
attempt to take any measurements. Refer to Return for
Repair section.
3.
Never ground yourself when taking electrical
measurements. Do not touch exposed metal pipes,
outlets, fixtures, etc. which might be at ground
potential. Keep your body isolated from ground by
using dry clothing, rubber shoes, rubber mats, or any
approved insulating material.
4.
To avoid electric shock use CAUTION when working
with voltages above 40Vdc or 20Vac. Such voltages
pose a shock hazard.
5.
Never exceed the maximum allowable input value of
any function when taking measurement. Refer to the
chart above for maximum inputs
6.
Never touch exposed wiring, connections or any live
circuit when attempting to take measurements.
7.
Do not attempt to operate this instrument in an
explosive atmosphere (i.e in the presence of
flammable gases or fumes, vapor or dust).
8.
When testing for the presence of voltage make sure
the voltage function is operating properly by reading a
known voltage in that function before assuming that a
zero reading indicates a no-voltage condition.
Always Think Safety, Act Safely
6) OPERATION
Before taking any measurements, read the Safety
Information Section. Always examine the instrument for
damage, contamination (excessive dirt, grease, etc.) and
defects. Examine the test leads for cracked or frayed
insulation. If any abnormal conditions exist do not attempt
to make any measurements. To clean, wipe with a clean
dry cloth.
Autoranging
The meter defaults to autorange when you turn it on. In
autorange, the meter selects the range automatically.
Manually Selecting a Range
The meter also has a manual range mode. In manual
range, you select and lock the meter in a range. To
manually select a range:
Press [RANGE HOLD] button to hold the selected range.
Subsequently pressing the [RANGE HOLD] button will
select each range in sequence from the lowest to the
highest range. Hold the button for 2 seconds to return to
the Autorange Mode.
Data Hold Feature
Press [DATA HOLD] button to toggle in and out of the Data
Hold mode. In the data hold mode, the annunciator is
displayed and the last reading is held on the display. Press
[DATA HOLD] button again to release the hold and current
readings are once again displayed.
Measuring Voltage
1.
Set the Function Switch to “VOLT” position.
2.
Select the Mode Switch to desired AC voltage range or
DC voltage range.
WARNING
To avoid possible electric shock and/or instrument
damage, do not attempt to take any voltage
measurements if the voltage is above 450Vdc/ac is
the maximum voltage that this meter is designed to
measure. the black (-) test lead potential should not
exceed 450Vdc/ac measured to earth ground.
3.
Apply the test lead probe tips to the two points where a
voltage reading is to be taken. The meter will
automatically select the proper range and display the
reading.
4.
When measurements are completed, disconnect the
test leads from the circuit under test.
Measuring Resistance
1.
Set the Function Switch to ”
Ω
/ 4–-i / •)))” position.
2.
Select the Mode Switch to “
Ω
” position.
3.
Completely de-energize the circuit or device to be
measured. Connect the test lead probe tips to the
device.
4.
The meter will automatically select the proper range
and display the reading.
Note:
The most significant digit blink indicates an overrange
condition. This will occur with the test leads open.
Measuring Continuity
1.
Set the Function Switch to ”
Ω
/ 4–-i / •)))” position.
2.
Select the Mode Switch to “•)))” position.
3.
Connect the test leads to the two points at which
continuity is to be tested. The buzzer will sound if the
resistance is approximately 60
Ω
± 20
Ω
.
Measuring Diodes
1.
Set the Function Switch to ”
Ω
/ 4–-i / •)))” position.
2.
Select the Mode Switch to “ 4–-i “ position.
3.
Touch probes to the diode. A forward voltage drop is
about 0.5-0.8 v (typical for a silicon diode).
4. Reverse probes. If the diode is good “OL” is displayed.
WARNING
All resistance and continuity measurements should
be taken on de-energized circuits only to insure safe
and accurate measurements. To avoid possible
electrical shock, instrument damage and/or
equipment damage, do not connect the test leads to
circuits having a potential difference greater than
450Vdc/ac. Do not connect the test leads to
potentials exceeding 450V to earth ground.
7) BATTERY REPLACEMENT
Power is supplied by two button-type batteries (NEDA
1166A, IEC LR-44). “B” appears on the LCD display when
replacement is needed.
WARNING
Before attempting to replace the battery, first
disconnect the Test Leads from any energized circuit.
1.
Disconnect the test leads from any energized circuit.
2.
Set the Function Switch to OFF.
3.
Remove battery cover screw.
4.
Slide off battery cover and change batteries.
5.
Replace battery cover and screw.
Battery Replacement
Battery
Compartment Cover
Screw
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10/06
Formulario No. 262-1
INSTRUCCIONES DE MANEJO
MODELO DM-2A
POCKET-PRO
®
MULTIMETRO DIGITAL
GARANTIA LIMITADA DE UN AÑO
Sperry Instruments garantiza que este instrumento Sperry ha sido
cuidadosamente probado, inspeccionado y garantizado por un (1)
año a partir de la fecha de compra por el usuario final original, a
condición de que el instrumento no haya sido usado indebidamente,
dañado debido a negligencia, descuido o reparación no autorizada,
abusado o usado en forma contraria a las instrucciones de manejo.
Los instrumentos y la prueba de compra en forma de una copia u
original legible del recibo de venta que identifique claramente el
distribuidor, el número de modelo y la fecha de compra, deben ser
devueltos a Sperry Instruments Attention: Customer Service Center,
2150 Joshua’s Path, Suite 302, Hauppauge, New York 11788, con
franqueo prepago para el examen y verificación del defecto de
fabricación bajo garantía. Sperry Instruments será el único juez de
dicho defecto. La responsabilidad de Sperry Instruments se limitará a
la reparación o cambio a su sola opción de cualquier producto
defectuoso.
1) INTRODUCCION
El modelo DM-2A es un concepto innovador en el diseño
de multímetros digitales. Es un MMD ultradelgado en
miniatura que combina la capacidad de medición de un
instrumento digital de 18 gamas y 5 funciones con la
practicidad y simplicidad de una calculadora de bolsillo. El
modelo DM-2A presenta los últimos adelantos en
construcción y diseño de alta tecnología. Todas las
características de los MMD de tamaño más grande se
encuentran en el modelo DM-2A. Selección automática de
gamas, protección contra sobrecarga en todas las gamas,
autopolaridad, indicación de continuidad audible/visual,
estuche plástico ABS resistente y mucho más. El modelo
DM-2A es sumamente fácil de usar. Dos selectores
accionados con el dedo pulgar controlan todas las
funciones. Los conductores de pruebas están incorporados
en el instrumento y no se pueden quitar. Siempre están allí
cuando usted los necesita. Se incluye un práctico estuche
estilo “libreta” que contiene el instrumento, los conductores
de pruebas y las instrucciones de manejo y permite que
usted pueda llevar el DM-2A fácilmente en el bolsillo de la
camisa.
2) CARACTERISTICAS
LISTADO POR LA ASOCIACION DE ASEGURADORES
(UL)
...según las normas de EE.UU. y Canadá
18 GAMAS, 5 FUNCIONES
GARANTIA LIMITADA DE UN AÑO
SELECCION DE GAMAS AUTOMATICA Y MANUAL
MANEJO SENCILLO
APAGADO AUTOMATICO
ZUMBADOR DE CONTINUIDAD
BOTON DE RETENCION DE GAMA
CONDUCTORES DE PRUEBAS INCORPORADOS
APACONTO AUTOMATICO
3) ESPECIFICACIONES
Visualizador:
Visualizador de cristal líquido digital de
3
-1/2
(LCD), lectura máxima de
1
999
con señal automática y anunciadores
de función.
Selección de
gamas:
Selección de gamas automática y
manual.
Polaridad:
Indicación de polaridad negativa (-)
automática.
Sobregama:
El dígito más significativo centellea.
Indicación de
poca pila:
Aparece la “B” cuando el voltaje de la
pila cae por debajo del nivel de
operación.
Velocidad
de medición:
2,5 veces por segundo, nominal.
Ambiente de
operación:
0° a 40°C (32° a 104°F). Humedad
relativa máxima de 80% a 31°C,
disminuyendo linealmente a una
humedad relativa de 50% a 40°C.
Temperatura de
almacenamiento:
-20°C a 80°C (-4° a 140°F) a <80% de
humedad relativa.
Energía:
Dos pilas tipo botón de 1,5V
(IEC # LR-44, NEDA # 186A). Pieza
Sperry # B-6
Consumo de
energía:
5mW normalmente.
Dimensiones:
43/8” de altura, 21/4” de ancho y 3/4”
de profundidad (111,5 mm de altura x
56 mm de ancho x 10,5 mm de
profundidad)
Peso:
Aproximadamente 3,0 onzas (86
gramos) incluyendo las pilas y el
estuche.
El instrumento cumple con la categoría de aislación
(categoría de sobrevoltaje II). Grado de contaminación 2 de
conformidad con la IEC-1010-1. Uso en interiores. Si el
equipo se utiliza en una forma no especificada, la
protección suministrada por el equipo puede verse
afectada negativamente.
4) EMPAQUE
El modelo DM-2A incluye dos pilas B-6, un estuche portátil
C-77 e instrucciones de manejo, formulario No. 262.
DOBLE AISLACION
ADVERTENCIA:
PARA EVITAR CHOQUE ELECTRICO,
DESCONECTE LAS TERMINALES DE MEDICION ANTES DE
QUITAR LA TAPA POSTERIOR.
Cuando servicio, usa soló especifico “partes de
recambió” o equivalente.
!
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2150 Joshua’s Path, Suite 302
Hauppauge, New York 11788
1-800-645-5398 | 631-231-7050
Fax: 631-434-3128
2150 Joshua’s Path, Suite 302
Hauppauge, New York 11788
1-800-645-5398 | 631-231-7050
Fax: 631-434-3128
DM2A IM_0906 10/5/06 5:01 PM Page 1
