Please read before using this equipment. USER'S MANUAL
Contents
1. 334 digit 4000 count multimeter Auto ranging with manual ranging override Fused 400mA 10A ranges DC voltage basic accuracy within 0 596 AC 400mv range for 45Hz to 100Hz Max Min recording function Data hold Continuity beeper and diode test 600 volts input protection on ohm range Surge voltage protection Water resistant Hold and Low battery annunciators Auto Polarity Rubber boot Large LCD display 50 8 mm 22 8 mm 2 INTERNATIONAL SYMBOLS Before using this Meter read the following safety information carefully In this manual the word WARNING is used for conditions and actions that pose hazard s to the user the word CAUTION is used for conditions and actions that may damage this Meter International Symbols ES Caution risk of electric shock ma Alternating Current AC Direct Current DC 2 Either DC or AC cl Ground Allowable applied voltage range between the WF input terminal and earth E Caution Refer to accompanying documents Double Insulation Protection Class II Fuse 12 X 1 5V AAM or R6 FA WARNING OBSERVE ALL SAFETY PRECAUTIONS WHEN MEA SURING HIGHER VOLTAGES AND OR CURRENTS TURN OFF POWER TO THE CIRCUIT UNDER TEST SET THIS METER TO THE DESIRED FUNCTION AND RANGE CONNECT THE TEST LEADS TO THIS METER AND THEN TO THE CIRCUIT UNDER TEST REAPPLY POWER IF AN ERRONEOUS READING IS OBSERVED DISCONNECT POWER IMMEDIATELY AND RECHECK ALL SETTINGS AND C2. 6 Break the circuit at the appropriate point then connect the test leads in series with the circuit to be tested 7 Reapply power to the circuit the measured current will appear on the display of the Meter 8 Disconnect power from the circuit before removing the test leads from the circuit 5 MAINTENANCE AND REPLACEABLE PARTS 5 1 General Maintenance WARNING REPAIRS OR SERVICING NOT COVERED IN THIS MANUAL SHOULD ONLY BE PERFORMED BY QUALIFIED PER SONNEL TO AVOID ELECTRICAL SHOCK DO NOT SER VICE UNLESS YOU ARE QUALIFIED TO DO SO 22 The following suggestions will help you care for the Meter so you can enjoy it for years Calibrate the Meter once a year to maintain its performance specifications Keep the Meter dry If it gets wet wipe it dry immediately Liquids can contain minerals that can corrode electronic circuits Keep the Meter away from dust and dirt which can cause premature wear of parts Handle the Meter gently and carefully Dropping it can damage the case and the circuit boards and can cause the Meter to improperly work Periodically wipe the case with a damp cloth do not use abrasives cleaning solvents or strong detergents to clean the Meter Use only fresh batteries of the required size and type Always remove old or weak batteries They can leak chemicals that destroy electronic circuits 5 2 Battery Replacement The Meter requires 2 X 1 5V AA batteries for po
3. Digital Multimeter Please read before using this equipment USER S MANUAL Bm WARNING SOURCES LIKE SMALL HAND HELD RADIO TRANSCEIVERS FIXED STATION RADIO AND TELEVISION TRANSMITTERS VEHICLE RADIO TRANSMITTERS AND CELLULAR PHONES GENERATE ELECTROMAGNETIC RADIATION THAT MAY INDUCE VOLTAGES IN THE TEST LEADS OF THE MULTIMETER IN SUCH CASES THE ACCURACY OF THE MULTIMETER CANNOT BE GUARANTEED DUE TO PHYSICAL REASONS Measurement Limits dc Voltage 0 1mV to 600V ac Voltage 0 1mV to 600V dc Amperes 0 1pA to 10A ac Amperes 0 1pA to 10A Resistance 0 10 to 40M Continuity Check Beep at Approx 500 in the 4000 range AB CAUTION NEVER CONNECT TO A SOURCE OF VOLTAGE WHEN YOU SELECT THE DC A AC A RESISTANCE MEASUREMENT OR DIODE TEST FUNCTION FA WARNING READ SAFETY CONSIDERATION BEFORE USING THIS METER CONTENTS 1 Introduction mmm mme 1 2 International Symbols EEUU 3 Explanation of Controls and Indicators n 4 Basic Electrical Tests and Measurements 11 5 Maintenance and Battery Fuse s Replacement 22 6 Accessories by F Specifications EUN EE N T E EE E P O A E E EE 26 1 INTRODUCTION This Meter is a handheld and battery operated instrument that is designed and tested according to UL3111 IEC Publication 1010 1 EN61010 1 Overvoltage Category 111 the EMC Directive and other safety standards see Specifications 1 Features
4. Hz Impedance a 27 Ohms Range Resolution Accuracy Impedance Voltage Current 4000 Vdda 1 2 mA or less 40 KQ 10 75 3digits 400 100 Q Vdda dc 3V 047V 0 7 or less Continuity Open circuit test voltage lt 3V threshold approx lt 50Q Diode Check Open circuit test voltage lt 2 5V MAX test current 3 1 7 2 Maximum Inputs FUNCTION INPUT TERMINALS MAXIMUM INPUT RED LEAD BLACK LEAD FUNCTION INPUT TERMINALS MAXIMUM INPUT RED LEAD BLACK LEAD COM 400mA 250V COM 400mA 250V FUSE PROTECTION F1 F 0 5A 660V F2 F 12 5A 250V 7 3 General Specifications Digital Display LCD Storage Temperature Operating Temperature Relative Humidity Temperature Coefficient Indoor use and Altitude Battery Life Size HX W XL Meter Only With Holster Weight Meter Only With Holster Vibration amp Shock Pollution Degree Installation Category Safety Standards Counts 4000 Updates 3 times sec 20 C to 60 C 0 C to 50 C 0 to 80 0 10 X Specified Accuracy C 18 or 28 Up to 2000m 1000 hrs typical alkaline 155 X 76 X 40 5 mm 168 X 85 X 50 mm 0 269 kg 0 466 kg Designed to MIL T 28800 for a class Il instrument 22 CAT Ill Designed to both IEC 1010 1 Overvoltage Category Ill and the EMC Directive UL31 11 1 CSA C222 No 1010 1 and ISA DS 82 29
5. above 400 plug the red test lead into the 10A MAX terminal For current measurements of 400 or less plug the test lead into the VO mA uA terminal Manual Range Control The auto range mode is very convenient but it might be faster to manually set the range when you measure values that you know to be within a certain range To select manual range control repeatedly press until the display shows the desired range The range steps upward as you press and R H appears on the display Change Alerting Buzzer The buzzer sounds a single tone when you change the function setting on the rotary switch or press any button and when the range is automatically changed in the Auto Range mode Using the Test Leads Use only the same type of test leads as those supplied with the Meter These test leads are rated for 1200 volts Although these test leads are rated for 1200 volts do not try to measure any voltage greater than the Meter s ratings that is 600 volts dc or ac NOTE In the 400mV dc or ac range with test leads not connected to any circuit the display might show fluctuating readings This is normal The high input sensitivity produces a wandering effect When you connect the test leads to a circuit a real measurement appears Using the Holster and Stand The Meter comes with a protective holster that absorbs shocks and protects the Meter from rough handling The holster is equipped with a stand rest 10 4 BA
6. voltage side of the circuit a minus polarity sign wil appear on the display at the left 7 Disconnect power to the circuit before removing the test RED LEAD leads from the circuit BLACK LEAD Three Phase AC Volts To improve the accuracy of dc voltage measurements taken in This Meter is designed to primarily measure household ac the presence of ac voltages such as measuring the dc offset voltage When measuring THREE PHASE circuits line to line voltage of an amplifier in the presence of an ac signal the value of the voltage is actually higher than the rated line to measure the ac voltage first Note the just measured ac ground 3 phase voltage It is very important that you do not voltage range and select a dc voltage range that is the same exceed the maximum ac RMS rating of this Meter 600V ac or higher than the ac voltage range This method improves the To find the RMS voltage line totine on a 3 phase power line dc voltage accuracy by preventing the input protection circuits multiply the rated line to ground voltage by the square root of 3 from being activated approx 1 732 12 13 For example if you connect this Meter to a 480 volts 3 phase line i e 480V line to ground the total available voltage line to line is about 832V ac 480V X 1 732 Severe damage and a dangerous shock hazard could result because this exceeds the rating of this Meter 4 2 Measuring Resistance Ohms Continuity Test FA CAUTION TURN
7. ERVICEABLE PARTS SERVICE SHOULD BE PERFORMED ONLY BY QUALIHED PERSONNEL 24 Follow these steps to replace the fuse s 1 Press POWER to turn off the Meter The display turns off 2 Disconnect the test leads from the circuit or component under test 3 Open the battery fuse compartment cover The two fuses in the compartment are exposed 4 Temporarily remove the batteries if needed It is not necessary to remove the batteries However fuse removal is easier with the batteries removed 5 Pull the fuse s red ribbon and remove the old fuse s from the metal fuse holders 6 Insert the new fuse s with the red ribbon in the metal holders 7 Replace the batteries if necessary and reattach the battery compartment cover to the Meter and reinstall the screws 6 ACCESSORIES NOTE When servicing the Meter use only the replaceable parts specified BT2 Battery 1 5V AA X 2 F2 F 12 5A 250V 1 F 0 5A 660V FTL 500V1 Test Lead Set C24G Rubber Boot Grey 25 7 SPECIFICATIONS 7 1 SPECIFICATIONS Accuracy is given as of reading number of least significant digits at 18 to 28 with relative humidity up to 80 for a period of one year after calibration dc volts 0 5 3digits ac volts Range Resolution Accuracy Frequency Input Hz Impedance 45 100 gt 100MQ 26 dc amps 1 2 3digits 400 mA 100 pA ac amps Range Resolution Accuracy Frequency Input
8. OFF POWER AND DISCHARGE ALL CAPACITORS ON CIRCUIT TO BE TESTED BEFORE ATTEMPTING INCIRCUIT RESISTANCE MEASUREMENTS FAILURE TO DO SO MAY END UP IN EQUIPMENT AND OR INSTRUMENT DAMAGE THE RESISTANCE MEASURING CIRCUIT APPLIES UNKNOWN VALUE OF CONSTANT CURRENT THROUGH THE UNKNOWN RESISTANCE AND THEN MEASURES THE VOLTAGE DEVELOPED ACROSS IT THEREFORE REMOVE ALL POWER TO THE CIRCUIT UNDER TEST WHEN MAKING RESISTANCE MEASUREMENT IF ANY VOLTAGE IS PRESENT IN THE TEST CIRCUIT AN ERRONEOUS READING WILL RESULT THIS METER MAY BE DAMAGED IF VOLTAGE IN EXCESS OF 600V ac IS PRESENT NOTE When measuring critically low ohm values touch tips of test leads together and record the reading Subtract this reading from any additional measurement to obtain the most accurate value 14 Dew ierra RED LEAD BLACK LEAD When measuring large resistance reading may be unstable due to environmentally induced electrical noise In this case directly connect the resistor at potential of the COM input terminal to obtain stable reading For resistance above 1Megohm the display might take a few seconds to stabilize This is normal for high resistance readings 15 The Meter has a circuit to protect the resistance range from overvoltage 600V ac However to prevent accidentally exceeding the protection circuits rating and to ensure a correct measurement NEVER CONNECT THE TEST LEADS TO A SOURCE OF VOLTAGE when the rotary switch is s
9. ONNECTIONS Safety Tips Exceeding the specified limits of this Meter is dangerous and can expose the user to serious and possible fatal injury To ensure safe and appropriate use please follow the safety guidelines below 3 Do not try to measure any voltage that exceeds dc or 600V RMS All AC limits are RMS values Voltages above dc 60V or ac 25V RMS may constitute a serious shock hazard Do not attempt to use this Meter if either the Meter or the test leads have been damaged Turn off power to the circuit under test before cutting unsoldering or breaking the circuit Small amounts of current can be dangerous Disconnect the live test lead before disconnecting the common test lead When using the test leads keep your fingers away from probe contacts Always grip behind the fingerguards on the probes Use a current clamp if measuring any current above 10Amps 3 EXPLANATION OF CONTROLS AND INDICATORS amp DIGITAL DISPLAY Digital readings are displayed on a 4000 count display with polarity indication and automatic decimal point placement When this Meter is turned on all display segments and symbols appear briefly during a selftest The display updates three times per second 2 0 Power to the Meter is turned on off Toggles between dc and ac when measuring amperes 10A mA pA and volts When dc is selected the symbol DC is displayed and when ac is selected the symbol AC is dis
10. SIC ELECTRICAL TESTS AND MEASUREMENTS 4 1 Measuring Voltage WARNING TO AVOID THE RISK OF ELECTRICAL AND INSTRUMENT DAMAGE INPUT VOLTAGES MUST NOT EXCEED 600V DC OR 600V AC RMS DO NOT ATTEMPT TO TAKE ANY UNKNOWN VOLTAGE MEASUREMENT THAT MAY BE IN EXCESS OF 600V DC OR 600V AC RMS THIS METER IS DESIGNED FOR MEASUREMENT IN WEAK CURRENT CIRCUITS DO NOT USE IT FOR STRONG CURRENT CIRCUITS POWER LINE IN FACTORIES AND SO ON HAVING LARGE CURRENT CAPACITY USE IN STRONG CURRENT CIRCUITS IS VERY DANGEROUS BECAUSE SURGE VOLTAGE IN FAR EXCESS OF RATING IS OFTEN APPLIED TO THEM NOTE When taking voltage measurements this Meter must be connected in PARALLEL with the circuit or circuit element under test 11 Follow these steps to measure dc or ac volts lur 24 DIGITAL MULTIMETER 1 Set function and range switch to the desired dc V or ac v CE Men Re range If you do not know the value of the voltage to be measured always start with the highest range and reduce the setting as required to obtain a satisfactory reading 2 Plug the red lead into the VO mA pA input terminal and the black lead into the COM input terminal of the instrument 3 Disconnect the power from the circuit to be tested 4 Connect the test leads to the circuit to be tested 5 Reapply power to the circuit the measured voltage will appear on the display of the instrument 6 If the red lead is connected to the negative or lower
11. attery Battery run out warning When EU is first displayed at least 8 hours of battery life remain Replace the battery immediately Never leave a weak or dead battery in the Meter MAX Displayed when the Meter displays the highest reading IF Displayed along with the present reading when the he button has been pressed MIN Displayed when the Meter displays the lowest reading 9 Bl Displayed when the Meter is in the continuity test function lt Displayed when the Meter is in the diode test function Displayed when the button has been pressed Displayed when the button has been pressed The following symbols indicate the unit of the value displayed V Volts E mV Millivolts 1X10 Volts A Amperes Amps mA Milliamperes 1X 10 Amps uA Microamperes 1X10 Amps Q Ohms KO Kilohm 1X 10 Ohms MQ Megohm 1X10 Ohms Auto Range Control In the auto range mode the Meter automatically selects the range that gives you the best reading The Meter automatically enters the auto range mode when you turn on power or when you select a new function AT appears on the display and the range is automatically set to the following pA for dc A or ac A 000 0 400 mA for dc A or ac 00 00mA Continuity OF L O 4000 NOTE You cannot use the 400mV dc or range in the auto range mode To use the 400mV range select manual range mode For current measurements
12. et to Q or Re functions The current applied during resistance measurements could damage some devices The table below lists the test voltage and current available for each resistance measurement range All values are typical RANGE OPEN CIRCUIT FULL SCALE SHORT CIRCUIT VOLTAGE A VOLTAGE B CURRENT C 2 99V 315mV 760 0 83V 560mV 409A NOTE A is the open circuit test voltage at the input terminals in volts B is the voltage drop across a resistance equal to full scale value C is the current through a short circuit at the input terminals 16 4 2 1 Measuring Ohms When measuring resistance be sure that the contact between the test leads and the circuit under test is good Dirt oil solder flux or other foreign matter seriously affect the reading value Follow these steps to measure ohms 1 Insert the test leads into the measurement terminals and turn off power to the circuit under test External voltage across the components causes erroneous readings 2 Set the rotary switch to the resistance Q continuity function Press POWER to turn on the Meter The Meter defaults to the resistance measurement mode 3 Touch the test probes to the test points and read the display The Meter beeps when OFL overload is displayed NOTES During continuity or resistance checks the probe s polarity does not matter During the auto range mode the Meter automatically selects t
13. he reading in reverse direction shows an overload BFE the device is good If the digital reading is the same in both directions the device is probably shorted If the display reads MF both directions the device is probably open Follow these steps to check a diode 1 Insert the black lead into the COM terminal and the red lead into the VO mA pA terminal 2 Set the rotary switch to the function Press POWER to turn on the Meter 3 Touch the red lead to the Anode side non banded end and the black test lead to the Cathode side banded end 4 If the diode is good the reading should indicate 0 3V to 0 8V on the LCD 5 Reverse the red and black leads on the diode if the LCD reads the overload sign the diode is good NOTE A defective diode will read OFL the overload sign or 0 00 no matter how the test leads are connected 19 4 4 Measuring Current Amps FA CAUTION THE CURRENT FUNCTIONS ARE PROTECTED BY A FUSE OF 250 VOLT RATING TO AVOID DAMAGE TO THE IN STRUMENT CURRENT SOURCES HAVING OPEN CIRCUIT VOLTAGES GREATER THAN 250 VOLTS DC OR AC MUST NOT BE MEASURED NOTE When taking current measurements this Meter must be connected in SERIES with the circuit or circuit element under test NEVER CONNECT THE TEST LEADS ACROSS A VOLTAGE SOURCE while the rotary switch is set to Amps This can cause damage to the circuit under test or this Meter To measure current you must break
14. he appropriate range During the manual range mode use RANGE HOLD to select the appropriate range OFL appears when the resistance measurement is greater than the set range 4 2 2 Continuity Test This mode helps you check electrical circuits such as wiring speaker cables connections switchers or relays for short or open circuits In continuity test a measured value of approx 500 300 or less causes the Meter to emit a continuous tone 17 Follow these steps to check continuity 1 Set the rotary switch to the O i function 2 Toggle until appears on the LCD to select the continuity function The range is automatically set to 4000 and OFL also appears on the LCD 3 Touch the test probes to the circuit to be measured The Meter will emit a continuous tone for the circuit resistance is 50 ohms 30 ohms or less 4 3 Diode Test Diode test lets you check diodes transistors and other semi conductors for opens shorts and normal operation NEVER CONNECT THE TEST LEADS TO A SOURCE OF VOLTAGE when the rotary switch is set to P age maser RED LEAD 1 8 BLACK LEAD In diode test drop voltage in the forward direction is displayed when diode is connected in the forward direction For a germanium diode the typical forward voltage is about 0 4V and in case of a silicon diode about 0 6V Judge the semiconductor device as follows If the digital reading in one direction shows a value and t
15. he maximum current that you can measure at this terminal is 10A dc ac This terminal is fuse protected A Refer to the user s manual before using this Meter A Amperes Input Terminal The red test lead is plugged into this terminal for measuring current on the 10A ac or dc current range NAY Se Ee RA COM Common Terminal The black test lead is plugged into this terminal for all measurements MIA The maximum voltage that you can measure at this MAE terminal is 600V dc ac or 400mA dc ac fuse FR protected A Be extremely careful when making high voltage measurements DO NOT TOUCH TERMINALS OR TEST LEAD PROBE ENDS VO mA pA Volts Ohms Milliamps Microamps Diode Test Input Terminal The red test lead is plugged into this terminal for all dc ac volts dc ac milliamps dc ac microamps ohm continuity test and diode test functions war D aw avoid electrical shock or instrument damage 2 F donotconnect the COM input terminal to any source of more than 600V with respect to earth ground AN 117 FGBBBBs BFL AC Displayed when ac measurement function is selected Negative Polarity Automatically displayed when the input signal is negative DC Display when dc measurement function is selected AT Display when the Meter is in the Autorange mode EFL Overload Indication Displayed on the LCD when input is too large to display Low B
16. played Toggles between resistance Q and continuity 44 when measuring resistance or checking continuity When the Meter is in the continuity test function the symbol is displayed Selects the Manual Range mode the symbol R H is displayed Press to step through the ranges indicated by position of the decimal point The meter beeps whenever the range changes To return to Autorange press ze for two seconds or change to any other measurement function R H is no longer displayed Allows you to record either the highest or lowest measurements taken In Max Min Recording mode auto ranging function is disabled Press to cycle through maximum minimum and present readings The recording of a new maximum or minimum is indicated by beep sounds To exit Max Min Recording press for two seconds The Meter will return to Auto Range mode But when the Meter is in the 400mV dc or ac range the Meter will retum to Manual Range mode s Freezes reading in digital display the symbol D H is displayed Even if you remove the test probes from the circuit D H appears on the display To cancel data hold 5 again or press RANGE HOLD or POWER Or change the measurement function ROTARY SWITCH Describes functions that are selected by setting the rotary switch Microamperes dc ac 10A Amperes dc ac Q Resistance or Continuity mA Milliamperes dc ac V Volts dc ac P Diode test 77 Y RN T
17. the circuit and connect the test leads to two circuit connection points created by the break In altemating current measurement wavefoms other than sine wave causes error When measuring current the Meter s internal shunt resistors develop a voltage across the meter s terminals called burden voltage This voltage drop may affect precision circuits or measurements When the measured dc current s polarity is negative the minus sign appears before the value 20 mu xud a meee ae BLACK LEAD RED LEAD Follow these steps to measure dc or ac Amps 1 Insert the test leads into the Meter as follows Insert the black lead into the COM terminal For current measurements of over 400mA and under 104 insert the red lead into the Meter s 10A MAX terminal as above For current measurement of under 400mA insert the red lead into the Meter s VO mA pA terminal as below If you do know the amount of current to measure always start with the highest range and reduce the setting as required to obtain a satisfactory reading 2 Set the rotary switch to the desired 10 or mA or pA position Press POWER to turn on the Meter The Meter automatically defaults to the dc current measurement auto range mode 3 To select ac press DC AC AC appears on the display To return to dc press dc ac again 4 To select the manual range mode press R H appears on the display 5 Remove power from the circuit to be measured
18. wer WARNING TO AVOID ELECTRIC SHOCK BE SURE TO TURN OFF THE METER S POWER AND DISCONNECT BOTH TEST LEADS FROM ANY EQUIPMENT BEFORE YOU REMOVE OR INSTALL THE BATTERIES 23 Follow these steps to install the batteries 1 Remove the two screws of the battery fuse compartment cover from the back of the Meter and lift off the cover 2 Remove and discard the old batteries Always do not expose old batteries to extreme heat or fire They might explode and cause personal injury or damage equipment 3 Place two fresh AA batteries in the compartment If you do not plan to use the Meter for a month or more remove the batteries This protects the Meter from possible battery leakage 4 Reattach the battery compartment cover to the Meter and reinstall the screws 5 3 Fuse s Replacement The mA 40mA 400mA and 400 and 40004A ranges are protected by a F1 0 5A fuse and the 4A and 10A ranges are protected by a F2 12 5A fuse When more than 0 5A is input into the VO mA pA terminal or more than 12 5A is input into the 10A MAX terminal the fuses in the Meter might blow and cause the display to freeze at 00 0 When this happens replace the fuse supplied by ROTRONIC immediately The F2 12 5A fuse must be replaced by qualified service personnel only WARNING TO AVOID ELECTRIC SHOCK DISCONNECT THE TEST PROBES BEFORE REMOVING THE FUSE S REPLACE ONLY WITH SAME TYPE OF FUSE S THIS INSTRUMENT CONTAINS NO USER S
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