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IMPORTANT SAFETY INFORMATION
Please read these instructions carefully before use and retain for future 

reference.

• 

When using electrical appliances basic safety precautions should always be 

followed.

• 

Use the meter only as specified in this manual, or the protection provided may be 

impaired.

• 

Do not operate the meter or use test leads if they appear damaged, or if the meter 

is not operating properly. 

• 

There are no user-serviceable parts in this product. Refer servicing to qualified 

personnel.

• 

Always use the proper terminal, switch position and range for measurements 

before connecting the meter to the circuit under test.

• 

Verify the meter’s operation by measuring a known voltage.

• 

Do not apply more than the rated voltage as marked on the meter, between the 

terminals or between any terminal and earth ground.

• 

Use caution with voltages above 30V AC RMS or 60V DC. These voltages pose a 

shock hazard.

• 

Do not take voltage measurement if the value between the terminals and earth 

ground exceed 600V.

• 

Disconnect the circuit power and discharge all high voltage capacitors before 

testing resistance, continuity, diodes or capacitance.

• 

Do not use the meter around explosive gas or vapour.

• 

When using the test leads, keep your fingers behind the finger guards.

• 

Remove test leads from the meter before opening the meter case or battery door.

• 

Never operate the meter with the cover removed or the battery door open.

• 

Use only the test leads supplied or the protection may be impaired.

• 

Do not connect the meter to any voltage source while the rotary selector is in the 

current, resistance, capacitance, diode or continuity range.

• 

Replace the batteries as soon as the low battery indicator appears on the display.

• 

Fit a full set of batteries at one time.

• 

Remove dead batteries from the appliance or if it is not going to be used for a long 

time.

• 

Never mix old and new batteries together, or different types of batteries.

• 

Never dispose of batteries in a fire, or attempt to recharge ordinary batteries.

FEATURES

This meter is a portable, professional measuring instrument with LCD and backlight.

The meter can perform measurements of AC/DC voltage and current, resistance, 

frequency, duty cycle, capacitance as well as diode continuity.

The meter is equipped with:

- Auto range.

- Reading hold function.

- Square value measuring function (at AC A and AC V range).

- Maximum value measuring function.

- Minimum value measuring function.

- Ability to measure frequency by clamp.

- Auto power-off function.

Summary of Contents for D03128

Page 1: ...1 CLAMP METER MODEL D03128...

Page 2: ...Frequency or Duty Cycle 9 Switching Maximum or Minimum Value 10 Switching Functions 10 Backlight and Clamp Lighting Bulb 10 Auto Power Off 10 Preparing for Measurement 11 Measuring AC Current 11 Measu...

Page 3: ...Do not use the meter around explosive gas or vapour When using the test leads keep your fingers behind the finger guards Remove test leads from the meter before opening the meter case or battery door...

Page 4: ...12 Reading Hold Backlight Button HOLD B L 3 Panel 13 Rotary Selector 4 Trigger 14 OFF Power Switch 5 Function Switch Button SEL 15 Symbol 6 MAX MIN Switch Button MAX MIN 16 Symbol 7 Relative Switch Bu...

Page 5: ...INPUT JACKS Button Switch Jack Function HOLD B L button Hold the reading or control the backlight SEL button For switching among measuring functions REL button Relative value measurement Hz button Sw...

Page 6: ...rate 3 times sec Bar graph 30 times sec Unit indication Function and unit Auto power off time 15 minutes Operating power 1 5V x 3 AAA batteries Battery low indication on LCD Temperature factor 0 1 x...

Page 7: ...ue Frequency by a range from current clamp Range Resolution Accuracy 10Hz 0 01Hz 1 5 of rdg 5 digits 1kHz 0 001kHz 1kHz 0 001kHz Measurement range 10 1kHz Input current range 4A rms AC higher input cu...

Page 8: ...of rdg 3 digits 4k 0 001k 40k 0 01k 400k 0 1k 4M 0 001Mk 40M 0 1M 1 2 of rdg 3 digits Open circuit voltage 0 4V Overload protection 250V DC or rms AC Diode Range Resolution Function 0 001V Displaying...

Page 9: ...mode OL shows when the input value is larger than the allowed value of the measurement mode Press the key again and the relative measurement function will be cancelled Disable to enter REL mode when...

Page 10: ...set at about 15 seconds meaning the light will turn off automatically after about 15 seconds frequent use of the backlight will shorten the life of the batteries When the battery voltage is 3 7V the...

Page 11: ...400A rms AC MEASURING DC CURRENT WARNING Beware of electrocution Ensure that the test leads are disconnected from the meter before making current clamp measurements Set the rotary selector to the 40A...

Page 12: ...e that the test leads are disconnected from the meter before making current clamp measurements Set the rotary selector to the A range A or A position Press the trigger to open the jaw and fully enclos...

Page 13: ...uency test range is 10Hz 10kHz It is possible to test the frequency which is higher than 10kHz but the tolerance of the test result can t be ensured means the maximum input voltage is 750V rms AC WARN...

Page 14: ...V range position Press the Hz button to switch to DUTY measurement Connect the test leads to the two ends of the source or load for measurement Take the reading on the LCD Note If the duty cyle is les...

Page 15: ...ed test lead to the anode and the black test lead to the cathode of the diode for testing Take the reading on the LCD Note The meter will show the approximate forward voltage drop of the diode When th...

Page 16: ...es If the low battery symbol appears it means that the batteries should be replaced Loosen the fixing screw of the battery cover and remove it Replace the exhausted batteries with new ones Put the bat...

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