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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.

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.

2.1 FOR YOUR SAFETY

WARNING

   1. Use extreme caution when checking electrical circuits.

 

WARNING

 2. Do not stand in wet or damp work areas when working with electricity. Wear rubber soled boots or shoes.

 

WARNING

 3. Do not apply more voltage or current than the set range of the multimeter will allow.

 

WARNING

 4. Do not touch the metal probes of the test leads when making a measurement.

 

WARNING

 5. Replace worn test leads. Do not use test leads with broken or tattered insulation.

Replace damaged test leads with identical model number or electrical specifications before using the Meter. 

 

WARNING

 6.  Before you carrying out any measurement, make sure the display is normal after you turning on the meter.

 

WARNING

 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.

 

WARNING

 8.  Use the Meter only as specified in this operating manual, otherwise the protection provided by the Meter 

may be impaired.

  Equipment protected throughout by double insulation or reinforced insulation

 Caution, Risk of Danger (See note)

9.   Discharge a capacitor before measuring it.
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.

2.2 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.

This meter is a sensitive measuring device and should be treated with the same regard as other electrical and electronic 
devices.

Содержание DM6450

Страница 1: ...olt Ranges 4V 40V 400V 750V best accuracy 1 0 5 DC Volt Ranges 400mV 4V 40V 400V and 1000V best accuracy 0 8 1 AC Amps 400 A 4000 A 40mA 400mA 4A and 10A best accuracy 1 2 2 DC Amps 400 A 4000 A 40mA...

Страница 2: ...ter WARNING 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 WARNING 8 Use the Meter onl...

Страница 3: ...ING To avoid damage to the meter do not use this button when the measured voltage is higher than 250V Do not press this button for more than 3 seconds 1 Press and hold Low imp 400K button to switch in...

Страница 4: ...sition has a 4 0 A and a 10A range and is auto ranging Start with this 10A setting if the measured current is between 1A 10A Use the mA setting if the measured current is 400mA Use the A setting if th...

Страница 5: ...ment 4 5 CONTINUITY WARNING T o avoid damages to the Meter or to the devices under test disconnect circuit power and discharge all the high voltage capacitors before measuring resistance WARNING Do no...

Страница 6: ...rger than 400 F take more time to measure 4 8 FREQUENCY Hz WARNING To avoid personal injury do not attempt to measure voltage higher than 60V DC 30V AC during frequency measurement The measurement ran...

Страница 7: ...fuses or test leads When a warranty claim arises the purchaser must contact Sperry Instruments If the defect comes under the terms of this limited warranty Sperry Instruments will arrange at its sole...

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