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• Never make measurement on a circuit in which voltage over 1000V exists.
• Do not exceed the CAT rating of the measuring device
•  Do not attempt to make measurement in the presence of flammable gases.  

The use of the instrument may cause sparking, which can lead to an explosion.

• Never use the instrument if its surface or your hand is wet.
• Do not exceed the maximum allowable input of any measuring range.
• Never open the battery cover during a measurement.
•  The instrument is to be used only in its intended applications or conditions.  

Use in other than as intended may cause instrument damage or serious personal injury.

•  Never attempt to make any measurement if any abnormal conditions are noted,  

such as broken case, cracked test leads and exposed metal part.

• Do not turn the function selector switch with plugged in test leads connected to the circuit under test.
•  Do not install substitute parts or make any modification to the instrument.  

Return the instrument to your distributor for repair or recalibration.

• Do not try to replace the batteries if the surface of the instrument is wet.
• Always switch off the instrument before opening the battery compartment cover for battery replacement. 

• Set the Function Switch to an appropriate position before starting measurement.
• Firmly insert the test leads.
• Disconnect the test leads from the instrument for current measurement.
• Do not expose the instrument to the direct sun, high temperature and humidity or dewfall.
•  Be sure to power off the instrument after use. When the instrument will not be in use for a long period,  

place it in storage after removing the batteries.

•  Use only a soft cloth dampened with water or neutral detergent for cleaning the meter.  

Do not use abrasives, solvents or harsh chemicals. Allow to dry thoroughly before use.

   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 SAFETY WARNINGS
•  This instruction manual contains warnings and safety rules which must be observed by the user to  

ensure safe operation of the instrument and retain it in safe condition. 

• Read through and understand the instructions contained in this manual before using the instrument.

• Keep the manual at hand to enable quick reference whenever necessary.

• The instrument is to be used only in its intended applications.

• Understand and follow all the safety instructions contained in the manual.

• It is essential that all safety instructions are adhered to.

• Failure to follow the safety instructions may cause injury, instrument damage

The symbol 

 indicated on the instrument means that the user must refer to the related parts in the manual for safe operation  

of the instrument. It is essential to read the instructions wherever the symbol appears in the manual.

DANGER is reserved for conditions and actions that are likely to cause serious or fatal injury.

WARNING is reserved for conditions and actions that can cause serious or fatal injury.

CAUTION is reserved for conditions and actions that can cause injury or instrument damage.

DANGER

WARNING

CAUTION

Summary of Contents for DM4A

Page 1: ... is set to DCV or ACV Pressing it will also switch between Hz and when the dial is set to Hz measurement 5 HOLD Button Press to lock and hold the value currently being displayed Press again to exit this mode 6 Rotary Switch Turn to power the meter on and off and select the desired measurement function To save battery power turn to the OFF position when the meter is not in use See ROTARY SWITCH sec...

Page 2: ... thoroughly before use 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 ...

Page 3: ... and feeders from the distribution panel to outlets CAT IV The circuit from the service drop to the service entrance and to the power meter and primary over current protection device distribution panel Avoid placing the meter in areas where vibration dust or dirt is present Do not store the meter in excessively hot humid or damp places This meter is a sensitive measuring device and should be treat...

Page 4: ...s potentiometers switches extension cords and fuses Note For measurements 1MΩ the meter may take a few seconds to stabilize reading This is normal for high resistance measurements When the input is not connected i e at open circuit OL will be displayed as an overrange indication 5 4 CONTINUITY To avoid damages to the Meter or to the devices under test disconnect circuit power and discharge all the...

Page 5: ...structions above to measure Hz and 6 0 BATTERY REPLACEMENT To avoid false readings which could lead to possible electric shock or personal injury replace the battery as soon as the battery indicator 8 8 MAX MIN appears 1 Disconnect the connection between the test leads and the circuit under test 2 Turn the meter power off 3 Remove the screw from the back of the meter Lift off the back cover 4 Lift...

Page 6: ...h products shall not have been altered by the distributor The distributor shall be fully responsible for any warranties the distributor makes to its purchasers which are broader or more extensive than Sperry s limited warranty Lifetime Warranty Warranty Limitation The forgoing warranties are exclusive and are in lieu of all other express and implied warranties whatsoever including but not limited ...

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