USER'S MANUAL DIGITAL MULTIMETER DMR-4200 CIRCUIT-TEST ELECTRONICS www.circuittest.
TABLE OF CONTENTS SAFETY Safety Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Safety Symbols . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 INTRODUCTION LCD Symbol Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Front Panel Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 SPECIFICATIONS General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SAFETY INFORMATION This meter is CUL and UL approved and conforms to IEC 61010-1 for Category II 1000V. 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.
7 1 8 2 CIRCUIT-TEST DMR-4200 HOLD 3 POWER 200 2k O H MS Ω 20k 200k 2M TAN CAPACI 200m 20µ TS VOL DC CE 20M 4 2µ 2 200 n 20 20n 200 700 P AM 20 200m 2 20 20 AC 200m 2m AMPS 6 20A ! for 15 sec MAX every 30 min FUSED 20A MAX TEMP mA °F 20kHz TEMP CAP ! C DC 200 20m S VO LTS 2m 5 9 1000 2n FRE A 10 Q 11 V/Ω /F/ / FUSED 200mA MAX 1000 VDC 700 VAC MAX ! CAT II 1000V 500V MAX COM FRONT PANEL DESCRIPTION NO.
SPECIFICATIONS GENERAL Display: Maximum Display: Backlight Display: Ranging: Polarity: 3 1/2 digit 2000 count LCD 1999 5 seconds ON Manual Automatic, minus (-) sign indicates negative polarity, no sign for positive polarity Measuring rate: 3 times/sec Input impedance: 10M (DCV / ACV) Diode Test: Test current of 1.
RANGES AND ACCURACY FUNCTION RANGE RESOLUTION ACCURACY DC VOLTAGE (DC V) 200mV 2V 20V 200V 1000V 100µV 1mV 10mV 100mV 1V ±(0.5% reading + 1 digit) AC VOLTAGE (AC V) (40-400HZ) 2V 20V 200V 700V 1mV 10mV 100mV 1V ±(0.8% reading + 3 digits) DC CURRENT (DC A) 2mA 20mA 200mA 20A 1µA 10µA 100µA 10mA ±(0.8% reading + 1 digits) AC CURRENT (AC A) (40-400HZ) 2mA 200mA 20A 1µA 100µA 10mA ±(1.0% reading + 3 digits) ±(1.8% reading + 3 digits) ±(3.
OPERATING INSTRUCTIONS This meter comes with an exclusive patented technology featuring bright LEDs indicating the correct input jack to plug-in the positive (red) test lead for the selected function. The LED turns off after the test lead is completely plugged in the correct jack. If the test lead is plugged in the wrong jack, the LED will start flashing and the buzzer will start beeping. 1. DC VOLTAGE MEASUREMENT WARNING: MAXIMUM INPUT IS 1000V DC. USE EXTREME CAUTION WHEN WORKING WITH HIGH VOLTAGES.
2. AC VOLTAGE MEASUREMENT WARNING: MAXIMUM INPUT IS 700V AC. USE EXTREME CAUTION WHEN WORKING WITH HIGH VOLTAGES. NEVER APPLY TEST LEADS TO THE MEASURING CIRCUIT WHEN CHANGING THE POSITION OF THE FUNCTION SWITCH. IF YOU ARE UNSURE OF THE VOLTAGE BEING MEASURED, SELECT THE HIGHEST RANGE AND REDUCE UNTIL A SATISFACTORY READING IS OBTAINED. ➔ Set the function switch to 700 on the AC VOLTS scale. jack will turn on. ➔ Plug the red test lead in V/ /F/ / jack and the black test lead in jack.
➔ Plug the red test lead in TEMP/mA jack and the black test lead in jack. CIRCUIT-TEST DMR-4200 HOLD + DC – POWER CAPACI TAN TS VOL DC CE O H MS Ω P AM ➔ Apply power to the circuit. VO LTS DC ➔ Remove power from the circuit that is to be measured. Open up the circuit and connect the black lead to the negative side and the red lead to the positive side of the circuit so that the test leads are in series with the load to be measured. C S A AC AM ➔ Read the displayed current.
➔ If ʻIʼ appears on the display, it indicates over-range. Immediately remove test leads from the measuring circuit to avoid any damage to the meter. 4. AC CURRENT MEASUREMENT WARNING: WHEN MEASURING CURRENT REMOVE ALL POWER FROM THE CIRCUIT BEING TESTED. NEVER APPLY THE TEST LEAD TO THE MEASURING CIRCUIT WHEN CHANGING THE POSITION OF THE FUNCTION SWITCH. IF YOU ARE UNSURE OF THE CURRENT BEING MEASURED, SELECT THE HIGHEST RANGE AND REDUCE UNTIL A SATISFACTORY READING IS OBTAINED.
b) 200mA or more AC Current Measurement CAUTION! Do not exceed 15 seconds when measuring the 20A range and wait for 30 minutes between each measurement. ➔ Set the function switch to 20 on the AC AMPS scale. ➔ The LED above 20A jack will turn on. ➔ Plug the red test lead in 20A jack and black test lead in the jack. CIRCUIT-TEST DMR-4200 HOLD POWER CAPACI TAN TS VOL DC CE O H MS Ω P AM VO LTS DC S C ➔ Remove power from the circuit that is to be measured.
➔ Apply the test leads to the resistor being measured. If the resistor is part of a circuit, it is necessary to disconnect one end of the resistor to avoid any unwanted interference from the rest of the circuit. ➔ Read the displayed resistance. NOTE: • ‘I’ is also displayed when the inputs are not connected. • When measuring resistance above 1M , the meter may take a few seconds to get a stable reading. • Never measure a resistor that has voltage on it. 6.
7. DIODE TEST WARNING: NEVER CONNECT THE TEST LEAD TO ANY VOLTAGE WHEN THE FUNCTION SWITCH IS SET TO / . REMOVE ALL POWER FROM THE CIRCUIT BEING TESTED WHEN PERFORMING THE DIODE TEST. DISCHARGE ANY CHARGED CAPACITORS. Note: If the diode is part of a circuit, it is necessary to disconnect one end of the diode to avoid any unwanted interference from the rest of the circuit. The value indicated in the display during the diode check is the forward bias voltage. .
8. FREQUENCY MEASUREMENT WARNING: NEVER MEASURE FREQUENCY ON A CIRCUIT WITH MORE THAN 250V. ➔ Set the function switch to FREQ. jack will turn on. ➔ Plug the red test lead in V/ /F/ / jack and black test lead in jack. CIRCUIT-TEST DMR-4200 HOLD POWER TAN TS VOL DC CE O H MS Ω CAPACI ➔ Apply the test leads to the point of measurement. P AM VO LTS DC S ➔ Read the displayed frequency. C ➔ The LED next to V/ /F/ / A AC AM TEMP PS FRE CAP 20A Q V/Ω /F/ / CAT II 1000V TEMP mA COM 9.
10. CAPACITANCE MEASUREMENT WARNING: FULLY DISCHARGE THE CAPACITOR BY SHORTING THE CAPACITOR LEADS TOGETHER BEFORE TESTING. ➔ Set the function switch to 20µ on the CAPACITANCE scale. jack. DMR-4200 HOLD POWER TAN TS VOL DC CE O H MS Ω VO LTS P AM S C ➔ If ʻIʼ appears on the display, the value of the capacitor is over the maximum range of the meter. CIRCUIT-TEST DC ➔ Read the value and unit shown on the display. If the value does not have enough digits, turn the function switch to a lower range.
12. 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. 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/fuse cover and lift to open. ➔ Replace 9V battery observing the correct polarity.
b) 15 Amp Fast acting 6.3x32mm Ceramic Fuse (by a professional person only) ➔ Turn off the meter and disconnect both test leads. ➔ Remove the three screws at the back of the case (one at the top and two at the bottom). ➔ Remove the single screw securing the battery/fuse cover and lift to open. ➔ Remove the batteries. ➔ Carefully lift the top of the case away from the bottom. CAUTION: Lift the top case carefully - do not break the wires attached to the battery compartment.
MAINTENANCE a) Always keep the meter dry. b) Keep the meter clean. Wipe the case occasionally with a damp cloth. Do not use chemicals, cleaning solvents or detergents. c) Use and store the meter in recommended normal environmental conditions. Extreme temperatures can shorten the life of the electronic components. d) Use only fresh batteries. e) Remove the batteries when the meter is not being used for a long period of time. ACCESSORIES Test Leads (TL-107) Fuses: 5x20mm Fast Ceramic 0.5A/250V, 6.
