Digital Clamp Meter
User Manual
CM240
WWW.OWON.COM.CN
Page 1: ...Digital Clamp Meter User Manual CM240 WWW OWON COM CN ...
Page 2: ...t in the materials published originally The information in this manual was correct at the time of printing However LILLIPUT will continue to improve products and reserves the rights to change specification at any time without notice is the registered trademark of the LILLIPUT Company Fujian LILLIPUT Optoelectronics Technology Co Ltd No 19 Heming Road Lantian Industrial Zone Zhangzhou 363005 P R Ch...
Page 3: ...anel Description 3 LCD Display Symbols 4 Button Function and Auto Power Off 4 Making Measurements 5 Measuring DC Voltage 5 Measuring AC Voltage 6 Measuring Resistance 7 Testing Diode 7 Testing Continuity 8 Measuring AC Current 9 General Specifications 9 Electrical Specifications 10 Replacing the Batteries 12 ...
Page 4: ...ectric shock or personal injury read the Safety Information and Safety Warning carefully before using the meter Check the Accessories Open the package case and take out the Meter Check the following items carefully to see any missing or damaged part Item Description Quantity 1 User Manual 1 piece 2 Test Lead 1 pair In the event you find any missing or damage please contact your dealer immediately ...
Page 5: ...age to the instrument never exceed the allowable maximum input of each range 7 Be care of electric shock hazard when the voltage to be tested is above DC 60V or AC 30V 8 To avoid electric shock do not open the battery compartment cover when making measurement 9 Remove the test leads from the circuit being measured before replacing the battery 10 Do not change the built in circuit to avoid damage t...
Page 6: ...AZARDOUS LIVE conductors is permitted Capacitor Front Panel Description 1 Input Terminals 2 LCD Display 3 Functional Buttons SEL MAX HOLD 4 Rotary Switch 5 Trigger press the lever to open the transformer jaw 6 Hand Guards to protect user s hand from touching the dangerous area 7 Transformer Jaw designed to pick up the AC and DC current flowing through the conductor It could transfer current to vol...
Page 7: ... button the peak value of current data will be keeping displaying on LCD press it again to cancel this function 2 MAX Maximum data hold button when press this button the A D converter will keep measuring and the display updating the data and hold the maximum data 3 SEL Function selection button press for switching ohm diode continuity function when tested objects change 4 Auto power off If there i...
Page 8: ...ing function of 2 20AACV the buzzer won t sound 6 The Effectiveness of Functional Buttons Not every functional buttons can be used on every rotary switch positions Below table describe which functional buttons can be used on which rotary switch positions Range Functional Buttons LIGHT SEL H MAX RAN DC Voltage N A AC Voltage N A Resistance N A N A Continuity Diode test N A N A DC current 2 20A N A ...
Page 9: ... remove testing leads from the input terminals Measuring AC Voltage WARNING Beware of Electrocution Pay special attention to avoid electric shock when measuring high voltage Do not input the voltage which more than 600V rms AC 1 Plug the black test lead into the COM jack and the red test lead into the INPUT Jack 2 Set the rotary switch to V position to make the meter get into AC V range 3 Connect ...
Page 10: ... the COM jack and the red test lead into the INPUT Jack 2 Set the rotary switch to Ω range position 3 Connect the test leads to the ends of the resistance or circuit for measurement 4 Take the reading on the LCD To obtain a more precise reading you could remove the objects being tested from the circuit when measuring Testing Diode WARNING To avoid possible damage to your multimeter or to the equip...
Page 11: ...s being tested from the circuit when measuring Testing Continuity WARNING To avoid possible damage to your multimeter or to the equipment under test disconnect the circuit power and discharge all high voltage capacitors before testing for continuity 1 Plug the black test lead into the COM jack and the red test lead into the INPUT Jack 2 Set the rotary switch to Ω range position 3 Press the SEL but...
Page 12: ...gger to open jaw Fully enclose only one conductor 3 Take the reading on the LCD Note For right results do not enclose more than one conductor in the jaw For optimum results center the conductor in the jaw General Specifications 1 Auto range and manual range options are available 2 Over range protection is provided for all ranges 3 Display 1 3 2 digit 1999 count 4 Measuring method Dual slope integr...
Page 13: ...ght 186g Electrical Specifications Accuracy reading digits Operation temperature 23 75 RH 1 AC Voltage Auto Range Range Resolution Accuracy Overload protection 2 V 1 mV 1 2 5d 600V rms 20 V 10 mV 200 V 100 mV 600 V 1 V 1 5 5d Input impedance 10 MΩ Frequency range 40 Hz 1 kHz 2 DC Voltage Auto Range Range Resolution Accuracy Overload protection 200 mV 0 1 mV 0 8 5d 600V rms 2 V 1 mV 0 8 5d 20 V 10 ...
Page 14: ...oad protection 100 mΩ Built in buzzer will sound if resistance is lower than 30Ω Open circuit voltage is about 0 45V 600 Vp Note The buzzer may or may not sounds if the resistance of a circuit under test is between 30Ω to 100Ω The buzzer does not sound if the resistance of a circuit under test is higher than 100Ω 5 Diode Range Resolution Accuracy Overload protection 1 mV Displaying approximate for...
Page 15: ...ve Replacing the Batteries WARNING To avoid electric shock make sure that the test leads have been clearly move away from the circuit under measurement before opening the battery cover of the meter 1 If the sign appears it means that the batteries should be replaced 2 Loosen the fixing screw of the battery cover and remove it 3 Replace the exhausted batteries with new one 4 Put the battery cover b...
