USER'S MANUAL CLAMP ON MULTIMETER DCL-420 CIRCUIT-TEST ELECTRONICS www.circuittest.
TABLE OF CONTENTS SAFETY INFORMATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 SAFETY SYMBOLS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 LCD SYMBOL DEFINITIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 FRONT PANEL DESCRIPTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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.
SAFETY SYMBOLS Safety symbols and special annunciators on the meter and in this manual indicate cautions and warnings of important operational procedures that must be followed to ensure personal and product safety. This symbol indicates a General Warning. When adjacent to a terminal or operating device indicates that the operator must refer to an explanation in the Operating Instructions.
INTRODUCTION DCL-420 is a True RMS Auto Ranging Clamp on meter with 3-3/4 digit 4000 count display.
1 11 2 12 3 13 4 14 5 CIRCUIT-TEST 6 POWER ZERO ADJUST 15 DCL-420 7 AUTO POWER OFF TRUE RMS CLAMP METER 8 AC/DC 9 Hz °F MIN/MAX TEMP V 10 HOLD A AC600V DC600V ! 500V MAX ! COM CAT II V/F 16 17 18 19 FRONT PANEL DESCRIPTION NO. ITEM DESCRIPTION 1 Clamp Jaws Measure AC and DC current by clamping it around a single current carrying wire.
SPECIFICATIONS GENERAL Display: Maximum Display: Ranging: Auto Shut-off: Polarity: 3 3/4 digit 4000 count LCD 3999 Auto Meter will shut-off after 15 minutes from last use Automatic, minus (-) sign indicates negative polarity, no sign for positive polarity Input impedance: 10M (DCV / ACV) Continuity: Audible signal sounds if resistance is less than 36 (Note: The display will read up to 400.0 in continuity mode) Over range indication: a) In Continuity Check: 400.
RANGES AND ACCURACY FUNCTION RANGE RESOLUTION ACCURACY DC VOLTAGE (DC V) 400mV 4V 40V 400V 600V 4V 40V 400V 600V 400A 600A 300A 0.1mV 0.001V 0.01V 0.1V 1V 0.001V 0.01V 0.1V 1V 0.1A 1A 0.1A ±(1.0% reading + 4 digits) 600A 1A 400 4k 40k 400k 0 to 500°F 5-100kHz 1000Hz 10KHz 50KHz 0.1 1 10 100 1°F 0.01Hz 0.1Hz 1Hz 10Hz AC VOLTAGE (AC V) DC CURRENT (DC A) AC CURRENT (AC A) (40-400HZ) RESISTANCE TEMP °F FREQUENCY ±(1.5% reading + 4 digits) @ 50Hz, 60Hz and 400Hz ±(3.
OPERATING INSTRUCTIONS 1. DC VOLTAGE MEASUREMENT WARNING: MAXIMUM INPUT IS 600V DC. ➔ Plug the red test lead into V/F 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 V pushbutton once, ʻACʼ and ʻVʼ will appear on the display. ➔ Press AC/DC pushbutton once, ʻDCʼ and ʻVʼ will now appear on the display. ➔ Apply the test leads to the circuit to be measured.
3. DC CURRENT MEASUREMENT WARNING: DO NOT BREAK OR OPEN THE DC LINE BEING MEASURED. WHEN MEASURING DC CURRENT THIS UNIT IS DESIGNED TO CLAMP AROUND ONE OF THE DC LINES. DO NOT ATTEMPT TO MEASURE CURRENT USING THE TEST LEADS. DO NOT PUT MORE THAN ONE WIRE INSIDE THE CLAMP JAW. DISCONNECT THE TEST LEADS BEFORE TAKING ANY MEASUREMENTS. ➔ Turn off power to the DC line being measured. ➔ Press the Power button on the clamp meter. ➔ Press A pushbutton once. ʻACʼ and ʻAʼ will appear on the display.
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.
7. FREQUENCY MEASUREMENT NOTE: The meter will read frequency of voltages from 10V to 600V. ➔ Plug the red test lead into V/F 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 Hz pushbutton once, ʻHzʼ will now appear on the display. ➔ Apply the test leads to the point of measurement. ➔ Read the displayed frequency with proper decimal point and symbols (Hz or KHz). 8.
➔ Apply the test probes to the component or clamp jaws around the wire whose variable is to be measured. a) For MIN value measurement: ➔ Press MIN/MAX pushbutton once, ʻMINʼ and ʻD-Hʼ will appear on the display. As the value changes, the meter will show the lowest value measured. b) For MAX value measurement: ➔ Press MIN/MAX pushbutton twice, ʻMAXʼ and ʻD-Hʼ will appear on the display. As the value changes, the meter will show the highest value measured.
11. BATTERY REPLACEMENT WARNING: DISCONNECT BOTH TEST LEADS FROM ANY SOURCE OF VOLTAGE BEFORE REMOVING THE BACK COVER. DO NOT OPERATE THE METER UNTIL THE BACK COVER IS IN PLACE AND FASTENED SECURELY. BATT will appear in the display when the battery drops below the operating voltage and requires replacing. ➔ Turn off the meter and disconnect both test leads. ➔ Remove the single screw securing the battery cover and lift to open. ➔ Replace the 9V battery observing the correct polarity.
ACCESSORIES Test Leads (TL-108) ʻKʼ Type thermocouple (TL-190) Screw-on Alligator Clips (TL-210) Battery: 1 x 9V Carrying Case LIMITED WARRANTY Circuit-Test Electronics warrants to the original purchaser that this product be free of defect in material or workmanship for a period of 2 years from the date of purchase. Visit our 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.
