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– 10 –

For maximum accuracy it is recommended that the conductor passes 

through the centre of the clamp head opening (use the centering marks 

on the jaws as a guide).

 Apply power to the AC line being measured.

 Read the displayed current indicated with proper decimal point and 

symbols.

 Open clamp jaws and release.

5. RESISTANCE MEASUREMENT

 

WARNING: 

REMOVE ALL POWER FROM CIRCUIT BEING TESTED WHEN CHECKING 

RESISTANCE. DISCHARGE ANY CHARGED CAPACITORS. NEVER CONNECT THE PROBES 

TO ANY VOLTAGE WHILE THE FUNCTION IS SET TO 

/

.

 Plug the red test lead into  /  jack and the black test lead into 

COM

 

jack.

 Press the Power button. 

 ʻ400.0ʼ,   and   and will appear on the display with the digit ʻ4ʼ flashing.

 Press  /  pushbutton once, M  will now appear on the display.

 Apply the test leads to the circuit to be measured.

 Read the displayed resistance with proper decimal point and symbols  

(  or K  or M ).

6. CONTINUITY TEST

 

WARNING: 

REMOVE ALL POWER FROM CIRCUIT BEING TESTED WHEN CHECKING 

CONTINUITY. DISCHARGE ANY CHARGED CAPACITORS. NEVER CONNECT THE PROBES TO 

ANY VOLTAGE WHILE THE FUNCTION IS SET TO 

/

.

 Plug the red test lead into  /  jack and the black test lead into 

COM

 

jack.

 Press the Power button. 

 ʻ400.0ʼ,   and   and will appear on the display with the digit ʻ4ʼ flashing.

 Touch the test probe tips to the circuit or wire you wish to check.

 If the resistance is less than 36 , the audible signal will sound. The display 

will also show the actual resistance in ohms with proper decimal point. 

NOTE: The display will read up to a maximum of 400 ohms in Continuity mode.

Summary of Contents for DCL-420

Page 1: ...USER S MANUAL CLAMP ON MULTIMETER DCL 420 CIRCUIT TEST ELECTRONICS www circuittest com...

Page 2: ......

Page 3: ...acy 7 OPERATING INSTRUCTIONS 1 DC Voltage Measurement 8 2 AC Voltage Measurement 8 3 DC Current Measurement 9 4 AC Current Measurement 9 10 5 Resistance Measurement 10 6 Continuity Test 10 7 Frequency...

Page 4: ...0VAC RMS as these voltages pose a shock hazard Always consider circuits to be energized Never assume any equipment to be de energized Always start with power off Set the function switch to the correct...

Page 5: ...in the Operating Instructions 500V MAX This symbol indicates that the terminal s so marked must not be con nected to a circuit point at which the voltage with respect to ground exceeds 500V AC DC Thi...

Page 6: ...Voltage Current Resistance Continuity Temperature Frequency LCD DISPLAY SYMBOL DEFINITIONS DISPLAY SYMBOL DEFINITION DISPLAY SYMBOL DEFINITION AC Alternating Current A Amperage DC Direct Current V Vo...

Page 7: ...ture Jack Plug in K type thermocouple 9 Voltage Button Press to select voltage measurement 10 Jack Positive input jack to plug in red test lead to measure resistance or to check continuity 11 Power Bu...

Page 8: ...Continuity Check 400 0 appears on the display with 4 ashing b In Resistance Mode 40 00M appears on the display with 4 ashing Operating Temp 0 to 50 C 32 to 122 F Relative Humidity 80 Operating Storage...

Page 9: ...RRENT DC A 400A 600A 0 1A 1A 1 5 reading 4 digits AC CURRENT AC A 40 400HZ 300A 600A 0 1A 1A 1 5 reading 4 digits 50Hz 60Hz and 400Hz 3 5 reading 4 digits 40Hz to 1KHz RESISTANCE 400 4k 40k 400k 0 1 1...

Page 10: ...the circuit to be measured Ensure that the black lead is connected to the negative side of the circuit and the red lead to the positive Read the displayed voltage If minus sign appears the voltage is...

Page 11: ...closed and do not make any contact with the DC line For maximum accuracy it is recommended that the conductor passes through the centre of the clamp head opening use the centering marks on the jaws as...

Page 12: ...the digit 4 flashing Press pushbutton once M will now appear on the display Apply the test leads to the circuit to be measured Read the displayed resistance with proper decimal point and symbols or K...

Page 13: ...be into TEMP socket making sure to observe the correct polarity Press the Power button 400 0 and and will appear on the display with the digit 4 flashing Press F pushbutton once and F will appear on t...

Page 14: ...hevaluemayormaynotchangedependingupontherangethemeterwaslastin The meter must be turned OFF and the entire procedure must be re applied CAUTION To cancel MIN MAX measurement the meter must be turned O...

Page 15: ...e single screw securing the battery cover and lift to open Replace the 9V battery observing the correct polarity Replace the cover and tighten the screw MAINTENANCE a Always keep the meter dry b Keep...

Page 16: ...website www circuittest com for information on warranty service Any product which has been subjected to misuse or accidental damage is excluded from the warranty Except as stated above Circuit Test E...

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