DMR-4300 Manual.indd - Circuit Test Electronics
Contents
1. 14 8 Transistor hFE Measurement 15 9 Frequency Measurement 16 10 Temperature Measurement 16 11 Hold Function 17 12 Battery Replacement 17 13 Fuse Replacement 18 19 MAINTENANCE 20 ACCESSORIES 20 WARRANTY 20 2 SAFETY INFORMATION This meter is CUL and UL approved and conforms to IEC 61010 1 for Category III 600V and 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 Read this instruction manual carefully and completely before using the meter Lack of caution or poor safety practices can result2. A C A M P S F hFE DC POWER CIRCUIT TEST DMR 4300 10A CAT III 600V CAT II 1000V V COM F R E Q D C V O L T S O H M S D C A M P S A C V O LT S A C A M P S F hFE DC FREQ A mA 11 FREQ A mA POWER CIRCUIT TEST DMR 4300 10A CAT III 600V CAT II 1000V V COM F R E Q D C V O L T S O H M S D C A M P S A C V O LT S A C A M P S F hFE Apply power to the circuit Read the displayed current If OL 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 CHANG ING 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 a Less than 400mA AC Current Measurement Set the function switch to 400m on the AC AMPS scale and mA appear on the display and the LED next to FREQ A mA jack will turn on Plug the red test lead in
3. 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 OL is 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 CONTINUITY TEST WARNING NEVER CONNECT THE TEST LEADS TO ANY VOLTAGE WHEN THE FUNC TION SWITCH IS SET TO 400 REMOVE ALL POWER FROM THE CIRCUIT BEING TESTED WHEN CHECKING RESISTANCE DISCHARGE ANY CHARGED CAPACITORS Set the function switch to 400 on the OHMS scale and will appear on the display and the LED next to V jack will turn on Plug the red test lead into V jack and the black test lead into jack Apply the test leads to the circuit The buzzer will sound if the resistance is less than 20 and the measured resistance value will be displayed in Ohms POWER CIRCUIT TEST DMR 4300 10A FREQ A mA CAT III 600V CAT II 1000V V COM F R E Q D C V O L T S O H M S D C A M P S A C V O LT S A C A M P S F hFE WIRE 14 7 DIODE TEST WARNING NEVER CONNE
4. FREQ A mA jack and black test lead in the jack 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 Apply power to the circuit Read the displayed current If the numeral value in the display is too small change the function switch to next lower range Repeat until you have maximum digits pos sible without displaying OL If OL appears on the display it indicates over range Immediately remove test leads from the measuring circuit to avoid any damage to the meter 12 POWER CIRCUIT TEST DMR 4300 10A FREQ A mA CAT III 600V CAT II 1000V V COM F R E Q D C V O L T S O H M S D C A M P S A C V O LT S A C A M P S F hFE b 400mA or more AC Current Measurement CAUTION Do not exceed 15 seconds when measuring the 10A range and wait for 30 minutes between each measurement Set the function switch to 10A on the AC AMPS scale and A appear on the display and the LED above 10A jack will turn on Plug the red test lead in 10A jack and black test lead in the jack Remove power from the circuit that is to be measured Open up t
5. 95 F 5 to 35 C Storage Temp 14 to 122 F 10 to 50 C Relative Humidity lt 75 Operating Storage Power Source 2 x AAA 1 5V Batteries Fuse 0 5A 250V 5x20mm Fast Acting Ceramic 10A 500V 6 3x32mm Fast Acting Ceramic Temperature Probe K Type Thermocouple rated at 32 to 500 F Model no TL 190 Dimensions 185 H x 90 W x 45 D mm 75 16 x 31 2 x 113 16 Weight 347g 12 25 oz Accessories included One pair of test leads K type thermocouple Screw on Alligator Clips 2 x AAA batteries User s manual 7 RANGES AND ACCURACY FUNCTION RANGE RESOLUTION ACCURACY DC VOLTAGE DC V 400mV 4V 40V 400V 1000V 100 V 1mV 10mV 100mV 1V 0 5 reading 3 digits 0 8 reading 3 digits AC VOLTAGE AC V 40 400HZ 400mV 4V 40V 400V 750V 100 V 1mV 10mV 100mV 1V 0 5 reading 3 digits 0 8 reading 3 digits DC CURRENT DC A 400 A 4mA 40mA 400mA 10A 0 1 A 1 A 10 A 100 A 10mA 0 5 reading 3 digits 0 8 reading 3 digits 1 2 reading 3 digits AC CURRENT AC A 40 400HZ 4000 A 40mA 400mA 10A 1 A 10 A 100 A 10mA 0 5 reading 3 digits 0 8 reading 3 digits 1 2 reading 3 digits RESISTANCE 400 4k 40k 400k 4M 40M 0 1 1 10 100 1k 10k 0 5 reading 3 digits 1 0 reading 3 digits FREQUENCY 10 3kHz 1KHz 300kHz 1Hz 100Hz 1 8 re
6. switch to 750 on the AC VOLTS scale and V appear on the display and the LED next to V jack will turn on Plug the red test lead in V jack and black test lead in jack Apply the test leads to the circuit to be measured Read the displayed voltage If the reading displayed does not have a suf cient number of digits i e 114 instead of 113 6 set the function switch to the next lower range Repeat until you have the maximum digits possible without displaying OL If OL appears on the display it indicates over range Immediately re move test leads from the measuring circuit to avoid any damage to the meter The input voltage should not exceed the measurement capability of this meter 3 DC CURRENT MEASUREMENT WARNING WHEN MEASURING CURRENT REMOVE ALL POWER FROM THE CIRCUIT BEING TESTED NEVER APPLY THE TEST LEAD TO THE MEASURING CIRCUIT WHEN CHANG ING 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 a Less than 400mA DC Current Measurement Set the function switch to 400m on the DC AMPS scale mA appears on the display and the LED next to FREQ A mA jack will turn on 10 Plug the red test lead in FREQ A mA jack and black test lead in the jack Remove power from the circuit that is to be measured
7. 1000V V COM F R E Q D C V O L T S O H M S D C A M P S A C V O LT S A C A M P S F hFE 15 8 TRANSISTOR HFE MEASUREMENT WARNING NEVER CONNECT THE TEST LEAD TO ANY VOLTAGE WHEN THE FUNCTION SWITCH IS SET TO HFE REMOVE ALL POWER FROM THE CIRCUIT BEING TESTED WHEN PERFORMING THE HFE TEST DISCHARGE ANY CHARGED CAPACITORS FOR ACCURATE MEASUREMENT IT IS RECOMMENDED TO REMOVE THE TRANSISTOR FROM THE CIRCUIT Note To measure the hFE gain of a bipolar junction transistor you must know two things a whether the transistor is a PNP or an NPN b how to identify the Emitter E Base B and Collector C leads of the transistor The transistor socket has two independent socket for NPN and PNP with two possible lead con guration Most transistor leads are arranged in EBC pattern but a few have the BCE con guration The transistor socket allows for either pattern by having four openings arranged as EBCE Use the rst three for EBC and last three for BCE Set the function switch to hFE HFE appears on the display Insert the transistor leads into the correct positions of the socket Read the displayed hFE value Note The hFE reading is limited to the test current of the multimeter circuit 10 A DC base current and Vce of approximately 1 5V DC The hFE reading may be differ
8. CT THE TEST LEAD TO ANY VOLTAGE WHEN THE FUNC TION 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 discon nect 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 Set the function switch to and V will appear on the display and the LED next to V jack will turn on Plug the red test lead into V jack and the black test lead into jack Apply the test leads across the diode terminals and note the meter reading Reverse the diode and note this reading Based on the readings the result can be evaluated as follows If one reading is around 0 5 and the other reading is OL the diode is good If both readings are OL the diode is open defective If both readings are very small or 0 zero the diode is shorted defective POWER CIRCUIT TEST DMR 4300 10A FREQ A mA CAT III 600V CAT II 1000V V COM F R E Q D C V O L T S O H M S D C A M P S A C V O LT S A C A M P S F hFE POWER CIRCUIT TEST DMR 4300 10A FREQ A mA CAT III 600V CAT II
9. 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 Apply power to the circuit Read the displayed current If the numeral value in the display is too small change the function switch to next lower range Repeat until you have maximum digits pos sible without displaying OL If OL appears on the display it indicates over range Immediately remove test leads from the measuring circuit to avoid any damage to the meter b 400mA or more DC Current Measurement CAUTION Do not exceed 15 seconds when measuring the 10A range and wait for 30 minutes between each measurement Set the function switch to 10A on the DC AMPS scale A appears on the display and the LED above 10A jack will turn on Plug the red test lead in 10A jack and black test lead in the jack 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 POWER CIRCUIT TEST DMR 4300 10A FREQ A mA CAT III 600V CAT II 1000V V COM F R E Q D C V O L T S O H M S D C A M P S A C V O LT S
10. Plug in black test lead in all measurement modes common ground TEMP POWER CIRCUIT TEST DMR 4300 10A FREQ A mA HOLD 1000 VDC 750 VAC CAT III 600V CAT II 1000V FUSED 400mA MAX 500V MAX for 15 sec MAX every 30 min FUSED 10A MAX V COM F R E Q D C V O L T S O H M S D C A M P S A C V O LT S A C A M P S NPN PNP E B C E 400 4k 40k 750 1000 400 40 4 400 m 400 40 4 400m 10A 10A 400m 40m 4m 400 m 40m 4m 400 3kHz F 1 300 kHz hFE 400k 4M 40M BAT DH F MAN MK HFE KHz mVA 12 11 10 9 8 7 6 5 4 3 2 1 FRONT PANEL DESCRIPTION 6 SPECIFICATIONS GENERAL Display 3 3 4 digit 4000 count LCD Maximum Display 3999 Backlight Display 15 seconds ON Ranging Manual Auto Shut off Meter will shut off after 30 minutes from last use Polarity Automatic minus sign indicates negative polar ity no sign for positive polarity Measuring rate 3 times sec Input impedance 10M DCV ACV Diode Test Test current of 1 0 mA maximum Continuity Audible signal sounds if resistance is less than 20 Transistor Test Base current approx 10 A DC Vce approx 1 5V DC Over range indication OL is displayed Operating Temp 41 to
11. USER S MANUAL DIGITAL MULTIMETER DMR 4300 CIRCUIT TEST ELECTRONICS www circuittest com 1 TABLE OF CONTENTS SAFETY Safety Information 2 Safety Symbols 3 INTRODUCTION LCD Symbol De nitions 4 Front Panel Description 5 SPECIFICATIONS General 6 Ranges and Accuracy 7 OPERATING INSTRUCTIONS 1 DC Voltage Measurement 8 2 AC Voltage Measurement 9 3 DC Current Measurement 9 11 a less than 400mA DC current b 400mA or more DC current 4 AC Current Measurement 11 12 a less than 400mA DC current b 400mA or more AC current 5 Resistance Measurement 12 13 6 Continuity Test 13 7 Diode Test
12. ading 5 digits TEMP F 4 to 1200 F 1 F 1 5 reading 3 digits NOTE Accuracy consists of reading i e accuracy of the measurement circuit digits i e accuracy of the analog to digital converter 8 POWER CIRCUIT TEST DMR 4300 10A CAT III 600V CAT II 1000V V COM F R E Q D C V O L T S O H M S D C A M P S A C V O LT S A C A M P S F hFE DC FREQ A mA 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 ashing and the buzzer will start beeping 1 DC VOLTAGE MEASUREMENT WARNING MAXIMUM INPUT IS 1000V DC USE EXTREME CAUTION WHEN WORKING WITH HIGH VOLTAGES NEVER APPLY THE TEST LEAD 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 1000 on the DC VOLTS scale V appears on the display and the LED next to V jack will turn on Plug the red test lead in V jack a
13. ating Current K Kilo KHz Kilo Hertz Frequency Ohms HFE Transistor Micro DH Data Hold m milli Diode V Volts F Degrees Fahrenheit A Amps MAN Manual Ranging OL Over Range Continuity BAT DH F MAN MK HFE KHz mVA 5 NO ITEM DESCRIPTION 1 LCD Display 3 3 4 digit 4000 count LCD Display 2 Power Button Power ON OFF push button switch 3 Transistor Socket For performing transistor hFE test 4 Temperature Jack Plug in K type thermocouple observing the polarity 5 10A Jack Positive Input Jack to plug in red test lead for 10A measurement only 6 FREQ A mA Jack Positive Input Jack to plug in red test lead for frequency measure ment or current measurement up to 400mA 7 Backlight Button Backlight display will shut off automatically after 15 seconds 8 Hold Button The displayed data will freeze and DH will appear on the LCD Changes in the input signal will not change the display 9 Function Switch Function Switch to select measurement mode 10 Test Lead Input Indicating LEDs Lighted LED indicates the correct jack to plug in the test lead for the selected function LED will turn off after the test lead is fully inserted If the test lead is incorrectly plugged in the LED will start blinking and buzzer will sound 11 V Jack Positive Input Jack to plug in red test lead for voltage resistor diode and continuity check 12 Jack
14. ch has been subjected to misuse or accidental damage is excluded from the warranty Except as stated above Circuit Test Electronics makes no promises or warranties either expressed or implied including war ranties of merchantability or the tness for any particular purpose Register your product online at www circuittest com CIRCUIT TEST E L E C T R O N I C S A division of R P Electronic Components Ltd www circuittest com
15. ent than the published transistor data but will provide information as to whether the transistor is functional POWER CIRCUIT TEST DMR 4300 10A FREQ A mA CAT III 600V CAT II 1000V V COM F R E Q D C V O L T S O H M S D C A M P S A C V O LT S A C A M P S F hFE E B C E NPN PNP E B C E 16 9 FREQUENCY MEASUREMENT WARNING NEVER MEASURE FREQUENCY ON A CIRCUIT WITH MORE THAN 250V Set the function switch to the desired FREQ scale KHz will appear on the display and the LED next to FREQ A mA jack will turn on Plug the red test lead in the FREQ A mA jack and black test lead in the jack Apply the test leads to the point of measurement Read the displayed frequency 10 TEMPERATURE MEASUREMENT WARNING REMOVE ALL VOLTAGE SOURCES FROM THE CIRCUIT TO BE TESTED BEFORE TAKING A TEMPERATURE MEASUREMENT NOTE If the function switch is set to F and the K type temperature probe is not inserted in the temperature socket the meter will give an audible signal Once the temperature probe is inserted the signal will automatically stop Set the function switch to F Plug the K type thermocouple into the TEMP jack NOTE The K type thermocouple supplied with this meter is rated at 32 to 500 F although the meter i
16. he 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 Apply power to the circuit Read the displayed current If OL appears on the display it indi cates over range Immediately remove test leads from the measuring circuit to avoid any damage to the meter 5 RESISTANCE MEASUREMENT 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 CHECK ING RESISTANCE DISCHARGE ANY CHARGED CAPACITORS NEVER APPLY THE TEST LEAD TO THE MEASURING CIRCUIT WHEN CHANGING THE POSITION OF THE FUNCTION SWITCH IF YOU ARE UNSURE OF THE RESISTANCE BEING MEASURED SELECT THE HIGHEST RANGE AND REDUCE UNTIL A SATISFACTORY READING IS OBTAINED Set the function switch to the desired OHMS scale K or M will appear on the display depending on the range selected and the LED next to V jack will turn on POWER CIRCUIT TEST DMR 4300 10A FREQ A mA CAT III 600V CAT II 1000V V COM F R E Q D C V O L T S O H M S D C A M P S A C V O LT S A C A M P S F hFE RESISTOR 13 Plug the red test lead in V jack and black test lead in jack
17. 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 volt ages 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 BAT appears on the display change both batteries to achieve more accurate readings Disconnect test leads before removing the batteries or the fuse Do not operate the unit unless the case is completely closed When using the test probes always keep ngers behind the nger guards Never touch the exposed probe tip Always inspect the instrument test lead
18. l 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 both AAA batteries observing the correct polarity Replace the cover and tighten the screw 18 13 FUSE 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 a 0 5 Amp Fast acting 5x20mm Fuse Turn off the meter and disconnect both test leads Remove the single screw securing the battery fuse cover and lift to open Remove the batteries Gently pull the fuse from its holder by pulling gently on the ribbon Replace the blown fuse with a CSA UL listed fast acting fuse rated at 0 5A 250V only with the same ribbon ring around the fuse Do not use a fuse which has higher rated value than speci ed or try to bypass the fuse Replace the batteries and cover and tighten the screw 19 b 10 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
19. nd black test lead in jack Apply the test leads to the circuit to be measured Ensure that the black lead is connected to the negative side of the circuit and red lead to the positive Read the displayed voltage If the reading displayed does not have a suf cient number of digits i e 00 2 Instead of 1 786 set the function switch to the next lower range Repeat until you have maxi mum digits possible without displaying OL If the minus sign appears it means the voltage is negative at the point being measured If OL appears on the display it indicates over range Immediately re move test leads from the measuring circuit to avoid any damage to the meter The input voltage should not exceed the measurement capability of this meter 9 POWER CIRCUIT TEST DMR 4300 10A FREQ A mA CAT III 600V CAT II 1000V V COM F R E Q D C V O L T S O H M S D C A M P S A C V O LT S A C A M P S F hFE 2 AC VOLTAGE MEASUREMENT WARNING MAXIMUM INPUT IS 750V 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
20. 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 Gently lift the battery compart ment and move it through the hole on the inner side of the meter The 10 amp fuse is the larger fuse on the bottom of the PC board which should now be in full view Carefully remove the old fuse and replace it with a new CSA UL listed fast acting ceramic 10A 500V fuse only 20 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 Always use fresh batteries e Remove the batteries when the meter is not being used for a long period of time ACCESSORIES Test Leads TL 108 K Type Thermocouple TL 190 Screw on Alligator Clips TL 210 Fuses 5x20mm Fast 0 5A 250V 6 3x32mm Fast Ceramic 10A 500V Batteries 2 x AAA 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 whi
21. s capable of measuring up to 1200 F Touch the probe tip to the component you are testing and keep it there for about 30 seconds or until the reading stabilizes The digital reading will display the value in proper decimal point amp value POWER CIRCUIT TEST DMR 4300 10A FREQ A mA CAT III 600V CAT II 1000V V COM F R E Q D C V O L T S O H M S D C A M P S A C V O LT S A C A M P S F hFE POWER CIRCUIT TEST DMR 4300 10A FREQ A mA CAT III 600V CAT II 1000V V COM F R E Q D C V O L T S O H M S D C A M P S A C V O LT S A C A M P S F hFE 17 11 HOLD FUNCTION This function is used to hold a reading When this pushbutton is pressed the data being displayed at the time will be frozen in the display and DH will appear in the display Changes in the input signals will not change the display This function can be used in all measurement modes Press the pushbutton again to release this function and DH will disappear 12 BATTERY REPLACEMENT WARNING DISCONNECT BOTH TEST LEADS FROM ANY SOURCE OF VOLTAGE BE FORE REMOVING THE BACK COVER DO NOT OPERATE THE METER UNTIL THE BACK COVER IS IN PLACE AND FASTENED SECURELY BAT wil
22. s and other accessories for damage prior to use Use only UL recognized test leads included with this meter 3 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 termi nal or operating device indicates that the operator must refer to an explanation 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 This symbol adjacent to one or more terminals indicates them as being associated with ranges that may in normal use be subjected to particularly hazardous voltages For maximum safety the meter and its test leads should not be handled when these terminals are energized This meter is protected by double insulation Service this meter by a professional only 4 INTRODUCTION DMR 4300 is a manual ranging digital multimeter with a 4000 count LCD display This meter can measure test the following Voltage Current Resistance Continuity Diode Transistor hFE Temperature Frequency LCD DISPLAY SYMBOL DEFINITIONS DISPLAY SYMBOL DEFINITION DISPLAY SYMBOL DEFINITION BAT Low Battery M Mega Altern
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