background image

Incoming wire

Interior wiring

CAT. III

Transformer CAT. II

CAT. I

CAT. IV

Socket

Symbols

Caution, risk of danger, refer to the operating manual before use

Caution, risk of electric shock

AC (Alternating Current)

DC (Direct current)

AC/DC Selectable (Alternating Current/Direct Current)

Earth (ground) Terminal

The equipment is protected throughout by  
double insulation or reinforced insulation

Application around and removal from hazardous  
live conductors is permitted.

Conforms to Standards of European Union

Designates the product as recyclable  

electronic waste per WEEE Directive

Measurement categories (Over-voltage categories) 

To ensure safe operation of measuring instruments, IEC61010 establishes safety standards for various electrical environments,  

specified as CAT I through CAT IV, and called measurement categories. Higher-numbered categories correspond to electrical  

environments with greater momentary energy, so a measuring instrument designed for CAT III environments can endure greater  

momentary energy than one designed for CAT II.
• CAT I: Secondary electrical circuits connected to an AC electrical outlet through a transformer or similar device. 
• CAT II: Primary electrical circuits of equipment connected to an AC electrical outlet by a power cord. 
•  CAT III:  Primary electrical circuits of the equipment connected directly to the distribution panel,  

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 treated with the same regard as other electrical and electronic devices.
• When the meter is not in use keep the meter turned off to keep the battery from discharging.
•  When disconnecting the test leads from the unit, always grasp the leads where the input jacks meet the tester housing.  

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.

3.0 SPECIFICATIONS

3.1 MEASURING RANGE & ACCURACY
(Accuracy guaranteed at 18°C - 28°C, humidity <75%)

RANGE

RESOLUTION

ACCURACY

4V

1mV

± (0.8%+1)

40V

10mV

400V

100mV

600V

1V

± (1%+3)

DC VOLTAGE

RANGE

RESOLUTION

ACCURACY

4V

1mV

± (1.2%+3)

40V

10mV

400V

100mV

600V

1V

± (1.5%+5)

AC VOLTAGE

RANGE

RESOLUTION

ACCURACY

400

Ω

0.1

Ω

± (1.2% + 2)

4k

Ω

1

Ω

± (1%+2)

40k

Ω

10

Ω

400k

Ω

100

Ω

4M

Ω

1k

Ω

± (1.2% + 2)

40M

Ω

10k

Ω

± (1.5% + 2)

RESISTANCE

RANGE

RESOLUTION

ACCURACY

99.99Hz

0.1Hz

± (.5%+3)

999.9Hz

1Hz

9.999kHz

0.01kHz

99.99kHz

.1kHz

FREQUENCY

CONTINUITY TEST

RANGE

RESOLUTION

ACCURACY

0.1

Ω

60

Ω

 Buzzer beep

60

Ω

-100

Ω

 Buzzer  

may or may not beep

100

Ω

 No buzzer beep

DIODE

RANGE

RESOLUTION

A

A

400A

400A

The approximate forward voltage drop of the diode 

will be displayed.

DUTY CYCLE

RANGE

RESOLUTION

0.1%-99.9%

0.10%

3

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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