Download FIG. 5 - Test Equipment Depot

SPERRY
DM6250
Replace damaged test leads with identical model number or electrical specifications before using the Meter.
6. Before carrying out any measurement, make sure the display is normal after you turn on the meter.
INSTRUMENTS
7. Before using to check hazardous voltage, always test this Digital Multimeter on a known live circuit to
verify that this Digital Multimeter is working properly.
7 Function, Auto Range
Digital Multi-Meter
Equipment protected throughout by double insulation or reinforced insulation
Caution, Risk of Danger (See note)
SPERRY
INSTRUMENTS
©SPERRY INSTRUMENTS, INC.
3132409
CONFORMS TO UL 1436
CERTIFIED TO CAN/CSA-C22.2
No. 160-M1985
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Electro-Magnetic :
Agency Approvals:
Operating Temperature:
Relative Humidity:
Storage Temperature:
Dimension:
Weight:
Altitude:
Warranty info:
• Open circuit voltage is approximately 3V.
3.5 CONTINUITY (FIG. 5)
To avoid damages to the Meter or to the devices under test,
disconnect circuit power and discharge all the high-voltage capacitors
before measuring resistance.
8. Use the Meter only as specified in this operating manual, otherwise the protection provided by the
Meter may be impaired.
• Read this owners manual thoroughly before use and save.
The Professional’s Choice®
• Connect the test leads to the proper terminals as in figure above to avoid error display. The LCD displays OL
indicating open-circuit for wrong connection.
1. 3/12 digit Auto Backlit LCD display
2. Durable drop resistant housing
3. 8 position rotary dial
4. AC Volts
5. DC Volts
6. Battery test
7. Resistance
8. Diode Test
9. Audible Continuity Test
10. Temperature
11. Common input jack
12. Positive input jack
1.0 METER FUNCTIONS
Meter type:
Auto Ranging
Functions:
7
Ranges:
Auto
Display Count:
2000
Input impedance:
10 Meg Ohm
AC Volt Ranges:
.2 / 2 / 20 / 200 / 500 (.8% + 5 digits)
DC Volt Ranges:
.2 / 2 / 20 / 200 / 600 (.5% + 5 digits)
Resistance Ranges:
200 / 2k / 20k / 200k / 2M / 20M (1% + 2 digit)
Diode Test
Continuity:
Audible beep
Temperature:
-40 °F - 752 °F (8% + 5 digits)
(For Temperatures above 446F a rod style temp probe is required)
Battery Test Ranges: 1.5 V (.5% + 2)
Auto Off:
15 Minutes
Battery type:
Two AAA (included)
Battery Life:
100 hours with carbon-zinc cells,
200 hours with alkaline cells under normal
conditions.
Over Range Indication: Displayed value > 1999, displays OL (The
safety and accuracy will only be
guaranteed within the specification range)
by the input.
Polarity Indication:
“-“ is displayed for negative polarity
When it is under 1V/m frequency : total accuracy = assigned accuracy +5% of the range.
When it is over 1V/m frequency: there is no assigned accuracy.
ETL, CE (IEC/EN61010:, CAT III 600V, Pollution Degree 2
32°F - 104°F (0°C_40°C)
32°F - 86°F below <75%, 86°F - 104°F<50%
14°F - 122°F(-10°C - 50°C)
70mmx137mmx35mm
Around 200g (including battery)
Maximum 2000m
5 yr.
9. Discharge capacitors before measuring them.
10. Remove the test leads from the circuit being measured as soon as the test is completed. Never reset the
function/range switch to another range while the leads are still in contact with a circuit.
11. Do not measure voltage when the function/range switch is set on the resistance (ohms) settings. Do not measure
current when the meter is set on the resistance range. Never measure AC voltage when the meter is set on DC
voltage. Setting the meter on the incorrect function may burn out some of the internal circuitry and may pose a safety
hazard.
12. Damaged meters are not repairable nor is calibration possible. Damaged meters should be disposed of properly.
3. OPERATING INSTRUCTIONS
1. Set the function/range switch to the proper position before making a measurement. When the voltage is not known, it
MUST be determined that the capacity of the selected range will handle the amount of voltage in the circuit (see #3
under “For Your Safety”).
2. Avoid placing the meter in areas where vibration, dust or dirt are present. Do not store the meter in excessively hot,
humid or damp places.
Use extreme caution when using this multimeter. Improper use of this meter can result in severe damage, personal injury or
death. Follow all instructions and suggestions in this operators manual as well as observing normal electrical safety precautions.
Do not use this meter if you are unfamiliar with electrical circuits and proper test procedures.
3. When the meter is not in use keep the meter turned off to keep the battery from discharging.
4. When disconnecting the test leads from the unit, always grasp the leads where the input jacks meet the tester housing.
5. Do not immerse the meter in water or solvents. To clean the housing use a damp cloth with a minimal
amount of mild soap.
DIAL SETTINGS 3.1 AC VOLTS (V~) (FIG. 1)
1. Set the function switch to the AC V (V~) setting.
2. Touch the test leads to the circuit under test. With AC voltage, the
polarity of the test leads is not a factor.
NOTE: It is best to touch one of the test leads to ground or Neutral
first and then touch the 2nd test lead to the hot wire.
3. Read the value of the measurement displayed.
4. Typical AC Voltage measurements include wall outlets, appliance
outlets, motors, light fixtures and switches.
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Fig. 1
3.2 DC VOLTS (FIG. 2)
Keep the contact tip of the K type temperature probe clean for accurate
reading.
To measure temperature, connect the meter as shown:
O
F
Fig. 6
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Fig. 2
The included point contact K type temperature probe can only be measured up to 446F. For
any mesaurement higher than 446F a rod type temperature probe must be used instead.
When measuring resistance always make sure the power to the circuit is off.
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1. Set the function switch to the resistance (ohms) (Ω).
2. Touch the test leads to the resistor or non-energized component to be measured.
3. Read the value of the measurement displayed. With resistance measurements, the
polarity of the test leads is
not a factor.
4. Typical resistance/continuity measurements include resistors, potentiometer,
switches, extension cords and fuses.
For high resistance (>1M Ω), it is normal for the meter to take several seconds to
obtain a stable reading.
When there is no input, for example in open circuit condition, or overloading, the
Meter displays “OL.”
Fig. 3
3.4 DIODE TESTING (FIG. 4)
Use the diode test to check diodes, transistors, and other semiconductor devices.
The diode test sends a current through the semiconductor junction, and then
measures the voltage drop across the junction. A good silicon junction drops
between 0.5V and 0.8V.
To test out a diode out of a circuit, connect the Meter as below figure:
Fig. 4
Notes
• The Meter displays “OL” when there is no temperature probe connection.
• The included point contact K type temperature probe can only be measured up to
446F. For any measurement higher than 446F a rod type temperature probe
must be used.
3.7 HOUSEHOLD BATTERY (FIG. 7)
There is a setting for measuring common 1.5V household batteries.
1. Set the function switch to the 1.5 V battery position.
2. Touch the test leads to the positive and negative terminals on the battery. With DC
voltage, the polarity of the test
1.5V
leads is a factor. Touch the black (common) test lead to the negative (-) terminal and
the red test lead to the
positive (+) terminal.
+
3. Read the value of the measurement displayed. If the leads are reversed a “-“
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indicator will appear on the display.
4.0 BATTERY REPLACEMENT (FIG. 8)
1. Disconnect the connection between the test leads and the circuit under test, and
remove the test leads from the input terminals of the meter.
2. Turn the meter power off.
3. Remove the screw from battery door, and separate the battery door from the case
bottom.
4. Remove the battery from the contacts, noting the polarity of the battery terminals and
AAA
contacts.
AAA
5. Replace with two fresh AAA 1.5 volt batteries.
Note: Do not use rechargeable batteries in this unit.
3.3 RESISTANCE (FIG. 3)
Ω
1. Insert the red temperature probe into the V
terminal and the black temperature probe
into the COM terminal.
2. Set the function switch to “ F ”.
3. Touch the temperature probe to the object being measured.
4. The measured value shows on the display in degrees Fahrenheit.
Fig. 7
1. Set the function switch to the DC V ( V
) setting.
2. Touch the test leads to the circuit under test. With DC voltage, the polarity
of the test leads is a factor. Touch the black (common) test lead to the
negative DC source first and red (positive) test lead to the “live” source
second.
3. Read the value of the measurement displayed. If the leads are reversed a ““ indicator will appear on the display.
4. Typical DC Voltage measurements include car batteries, automotive
switches and household batteries.
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5. Replace worn test leads. Do not use test leads with broken or tattered insulation.
3.6 TEMPERATURE (Fig. 6)
NOTE: With any measurement made by this meter, there will be some fluctuation of the digital display. This is
due to the meter’s sampling method. This unit samples at a rate of 2 times per second, thus the fluctuation of
the readout.
2. Do not stand in wet or damp work areas when working with electricity. Wear rubber soled boots or shoes.
4. Do not touch the metal probes of the test leads when making a measurement.
Note
• Open circuit voltage is around 3V.
• When continuity testing has been completed, disconnect the connection between the testing leads and the
circuit under test.
Do not pull the leads out of the jacks by the insulated wire or transport the tester using the test leads as a carrying strap.
2.1 FOR YOUR SAFETY
1. Use extreme caution when checking electrical circuits.
3. Do not apply more voltage or current than the set range of the multimeter will allow!
1. Insert the red test lead into VΩ terminal and the black test lead into the COM
terminal.
2. Set the function switch to
Fig. 5
3. Connect the test leads across with the object being measured.
4. The buzzer sounds continuously if the resistance of a circuit under test is°‹10Ω,
it indicates the circuit is in good connection.
5. The buzzer does not sound if the resistance of a circuit under test is 70Ω, it indicates a broken circuit.
6. Read the resistance value on the display.
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This meter is a sensitive measuring device and should be treated with the same regard as other electrical and electronic devices.
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2.0 READ FIRST: IMPORTANT SAFETY INFORMATION
Read this operators manual thoroughly before using this multimeter. This manual is intended to provide basic information
regarding this meter and to describe common test procedures which can be made with this unit. Many types of appliance,
machinery and other electrical circuit measurements are not addressed in this manual and should be handled by experienced
service technicians.
Do not input DC 60V or AC 30V to avoid personal harm.
1. Set the function switch to diode position “
“
2. For forward voltage drop readings on any semiconductor component, place
the red test lead on the component’s anode and place the black test lead on
the component’s cathode.
3. Read the nearest value of diode forward voltage drop as displayed.
Notes
• In a circuit, a good diode should still produce a forward voltage drop reading of 0.5V to 0.8V; however; the
reverse voltage drop reading can vary depending on the resistance of other pathways between the probe tips.
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Fig. 8
6. Carefully, replace the battery cover and tighten the screw. Do not over tighten the
screw as this may strip the threads in the meter housing.
5.0 AUTO POWER OFF
To preserve battery life, the Meter automatically powers off if it is not used within 15 minutes.
The Meter can be reactivated by turning the rotary switch.
A. GENERAL SERVICE
• Periodically wipe the case with a damp cloth and mild detergent. Do not use abrasives or solvents.
• To clean the terminals use a cotton swab and detergent, as dirt and moisture in the terminals can affect ratings.
• Turn the Meter power off when it is not in use.
• Take out the battery when it is not used for a long time.
• Do not use or store the Meter in a place of humidity, high temperature.