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SAFETY INFORMATION

This meter is CUL and UL approved and conforms to IEC 61010-1 for Category 

II - 600V. This meter is designed to be safe under the following conditions: 

indoor use, altitude up to 2000m, temperature 5°C to 40°C, maximum relative 

humidity 80% for temperatures up to 31°C decreasing linearly to 50% relative 

humidity at 40°C and rated pollution degree 2. Caution and proper guidelines 

must  be  followed  for  personal  and  product  safety.  Read  this  instruction 

manual carefully and completely before using the meter. Lack of caution or 

poor safety practices can result in serious injury or death.
•  This meter is not recommended for high voltage industrial use; for 

example, do not use for measurement on 440VAC or 600VAC industrial 

power mains. The unit is intended for use with low energy circuits up to 

600VDC / 600VAC or high energy circuits up to 250VAC / 250VDC only. 

•  Use caution when working above 60VDC or 30VAC 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 setting 

before making any measurements and do not change position of the 

function switch during measurements.

•  Never connect unit to AC or DC powered circuits when the function 

switch is set to resistance, diode check or continuity ranges.

•  Always disconnect the power when performing resistance, diode or 

capacitance tests. Discharge capacitor before testing.

•  Disconnect the live/positive test lead (red) prior to disconnecting the 

common/negative test lead (black).

•  When 

BATT

 appears on the display, change the battery immediately.

•  Disconnect test leads from the meter before removing the battery.
•  Do not operate the unit unless the case is completely closed.
•  When using the test probes always keep fingers behind the finger 

guards. Never touch the exposed probe tip.

•  Always inspect the instrument, test leads and other accessories for 

damage prior to use.

•  Use only UL recognized test leads (included with this meter).

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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