DIGITAL MULTIMETER
Contents
1. Refer to the user s manual before using this Meter 7 A Amperes Input Terminal The red test lead is plugged into this terminal for measuring current on the 10A AC or DC current functions 8 MA pA Milliamp Microamp Input Terminal The red test lead is plugged into this terminal for measuring mA or pA on either AC or DC current functions Pela engl 9 10 14 MAX AC 750V DC 1000V The maximum voltage that this Meter can measure is 1000V DC or 750V AC RMS rin Be extremely careful when making high voltage measurement DO NOT TOUCH TERMINALS OR TEST LEAD PROBE ENDS VO Volt Ohms Diode Test Input Terminal The red test lead is plugged into this terminal for all AC V DC V Ohms Continuity test and Diode test functions we To avoid electrical shock or instrument damage do not connect the COM input terminal to any source of more than 600V with respect to earth ground COM Common Terminal The black test lead is plugged into this terminal for all measurements 144 _ s af af E a rg 17 AE E la 0 Ba Displayed when the HOLD button has been pressed 15 m Negative Polarity Automatically indicate negative inputs 7 16 ae Low Battery Battery run out warning When di 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 Even leak proof types can leak and damages the Meter2. a world leader in test amp measurement FINEST FINE INSTRUMENTS CORPORATION 341 5 SONGNAE DONG SOSA GU BUCHON SHI KYUNGGI KOREA TEL 82 32 656 8771 4 FAX 82 32 656 5844 E mail fine finest co kr Internet www finestwon com or www finest co kr Copyright 1999 Fine Instruments Corp All right reserved Specifications subject to change without notice Litho in Korea FINEST SOO DIGITAL MULTIMETER Please read before using this equipment USER S MANUAL ie 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 1000V AC Voltage ImV to 750V DC Amperes 0 1pA to 10A AC Amperes 0 1pA to 10A Resistance 0 10 to 20MQ Continuity Check Beep at Approx lt 150Q in the 200Q range A WARNING READ SAFETY CONSIDERATIONS BEFORE USING THIS METER CONTENTS 1 Introduction 2 2 Safety Considerations 3 3 Explanation of Controls and Indicators 5 4 Basic Electrical Tests and Measurements 9 5 Maintenance and Battery Fuse s Replacement 21 6 Accessories 23 7 Specifications 24 1 INTRODUCTION This Meter is a handheld and battery op
3. Microwave Didoes Diode test lets you check didoes transistors and other semiconductors for opens short and normal operation NEVER CONNECT THE TEST LEADS TO A SOURCE OF VOLTAGE when the rotary switch is set to iaje 16 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 It the digital reading in one direction shows a value and the reading in reverse direction shows an overload I the device is good If the digital reading is the same in both directions the device is probably shorted If the display reads I in both directions the device is probably open 4 3 1 Diode Test Follow these steps to check a diode i 2 3 4 5 Set the Function switch to the f position Insert the black test lead into the COM input terminal and the red test lead into the VQ input terminal Touch the red test lead to the Anode side non banded end and the black test lead to the Cathode side banded end If the diode is good the reading should indicate 0 3V to 0 8V on the LCD 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 the overload sign or 0 00 no matter how t
4. switch to the desired DC A or AC A range If you do not know the value of the current to be measured always start with the highest range and reduce the setting as required to obtain a satisfactory reading 2 Plug the red test lead into the mApA input terminal if the10A range is being used plug the red lead into the A 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 in series to the circuit to be tested 5 Reapply power to the circuit the measured current will appear on the display of the instrument 6 Disconnect power to the circuit before removing the test leads from the circuit 20 5 MAINTENANCE AND REPLACEABLE PARTS 5 1 General Maintenance EA WARNING REPAIRS OR SERVICING NOT COVERED IN THIS MANUAL SHOULD ONLY BE PERFORMED BY QUALIFIED PERSONNEL TO AVOID ELECTRICAL SHOCK DO NOT SERVICE UNLESS YOU ARE QUALIFIED TO DO SO Periodically wipe the case with a damp cloth and detergent do not use abrasives or solvents Water dirt or contamination in the A or mApA input terminals may harm this Meter Calibrate this Meter once a year to maintain its performance specifications 5 2 Battery Replacement The Meter uses a 9V battery NEDA 1604 or IEC 6F22 To replace the battery remove the two screws of the battery compartment from the back of the Meter and lift off the cover of the compa
5. 0 Ma lt 800mV lt 0 2 A 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 14 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 step to measure ohms 1 Set the Function switch to the desired Q position 2 Insert the black test lead into the COM input terminal and the red test lead into the VQ input terminal 3 Connect the test leads to the circuit to be measured 4 The measured resistance will be on the LCD 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 150Q or less causes the Meter to emit a continuous tone Follow these steps to check continuity 1 Set the Function switch to the position 2 Insert the black test lead into the COM input terminal and the red test lead into the VQ input terminal 3 Connect the test leads to the circuit to be measured 4 This Meter will emit a continuous tone for resistances of less than 150 ohms 15 4 3 Diode Test amp
6. 17 Overload Indication Displayed on the LCD when input is too large to display Using Test Leads Use only the same type of test leads as are 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 1000 volts DC or 750 volts AC NOTE In some DC and AC voltage ranges with test leads not connected to any circuits the display might show fluctuating readings due to the high input impedance This is normal When you connect the test leads to a circuit a real measurement appears Using 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 4 BASIC ELECTRICAL TESTS AND MEASUREMENTS 4 1 Measuring Voltage WARNINGS TO AVOID THE RISK OF ELECTRICAL SHOCK AND INSTRUMENT DAMAGE INPUT VOLTAGES MUST NOT EXCEED 1000V DC OR 750V AC RMS DO NOT ATTEMPT TO TAKE ANY UNKNOWN VOLTAGE MEASUREMENT THAT MAY BE IN EXCESS OF 1000V DC OR 750V 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 PA
7. 31 and ISA DS82 27
8. FICATIONS 7 1 Specifications Accuracy is given as of reading number of least significant digits at 18 C to 28 C with relative humidity up to 80 for a period of one year after calibration FUNCTION RANGE RESOLUTION ACCURACY REMARKS Input Impedance 200mV 100V DCV 2V imV 20V 10mV 0 5 1 dgt 10M9 200V 0 1V 1000V 1V 200mV 100V Input Impedance ACV 2V imV 45Hz to 20V 10mV 0 8 3 dgts 10MQ 450Hz 200V 0 1V 750V 1V t 1 2 3 dgts VOLTAGE DROP 200pA 0 1uA 1mV pA DCA 2mA 14A 100MV A 20mA 10uA 0 8 1 dgt 10mV mA 200mA 100pA 1 2mV mA 2A imA 0 28V A 10A 10mA 2 0 10 dgts 0 22V A 24 FUNCTION RANGE RESOLUTION ACCURACY REMARKS VOLTAGE DROP 200A 0 1A 1mV pA ACA amA 14A 100mMV pA 45Hzto 20mA 10pA 1 0 3 dgts 10mV mA 450Hz 200mA 100A 1 2mV mA 2A 1mA 0 28V A 10A 10mA 3 0 10 dgts 0 22V A Ohms 2000 0 10 0 5 10 dgts OPEN CIRCUIT VOLTAGE 2KQ 10 20KQ 10Q 0 5 1 dgt lt 1 2V 200KQ 0 1KQ 2MQ 1KQ 20MQ 10KQ 1 0 2 dgt Continuity OPEN CIRCUIT TEST VOLTAGE lt 1 2V THRESHOLD Approx lt 1500 Diode Check OPEN CIRCUIT TEST VOLTAGE lt 3V MAX TEST CURRENT 1mA NOTE DC V NORMAL MODE REJECTION RATIO gt 46dB at 50Hz or 60Hz COMMON MODE REJECTION RATIO gt 104dB at dc 50Hz or 60Hz AC V COMMON MODE REJECTION RATIO gt 80dB at de to 60Hz FUSE PRO
9. RALLEL with the circuit or circuit element under test In 200mV range displayed value may fluctuate when disconnecting input terminals This is normal AC voltage measuring circuit in this Meter is of mean value system so an AC waveform other than a sine wave causes error 10 To improve the accuracy of DC voltage measurements taken in the presence of AC voltages such as measuring the DC offset voltage of an amplifier in the presence of an AC signal measure the AC voltage first Note the just measured AC voltage range and select a DC voltage range that is the same or higher than the AC voltage range This method improves the DC voltage accuracy by preventing the input protection circuit from being activated Follow these steps to measure DC or AC volts 1 Set function and range switch to the desired DC V or AC V 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 Plug the red test lead into the VQ input terminal and the black lead into the COM input terminal of the instrument Disconnect the power from the circuit to be tested Connect the test leads to the circuit to be tested Reapply power to the circuit the measured voltage will appear on the display of the instrument If the red test lead is connected to the negative or lower voltage side of the circuit a
10. ST 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 CONNECTIONS Safety Tips e Do not try to measure any voltage that exceeds 1000V DC or 750V AC RMS e Voltages above 60V DC or 25V AC 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 e Disconnect the live test lead before disconnecting the common test lead e When using the test leads keep your fingers away from probe contacts Always grip behind the finger guards on the probes Use a current clamp if measuring any current above 10 Amps 3 EXPLANATION OF CONTROLS AND INDICATORS 1 DIGITAL DISPLAY Digital readings are displayed on a 2000 count display with polarity indication The display updates three times per second 2 Selects meter s power ON or power OFF 3 mus Freezes reading in digital display 4 ROTARY SWITCH Describes functions that are selected by setting the rotary switch Vv Volts ac Vv Volts de fy Amperes ac T Amperes dc Q Resistance Continuity Test P Diode Test 10A MAX 5 FUSED The maximum current that you can measure at this terminal is 10 Amps DC AC This terminal is fuse 6 A
11. T 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 12 When measuring large resistance reading may be unstable due to environmentally induced electrical noise In this case directly connect the resistor to input terminals of the meter or shield the resistor at potential of the COM input terminal to obtain stable reading 13 e For resistance above 1 Megohm the display might take a few seconds to stabilize This is normal for high resistance readings The Meter has a circuit to protect the resistance range from over voltage 600V AC However to prevent accidentally exceeding the protection circuit s rating and to ensure a correct measurement NEVER CONNECT THE TEST LEADS TO A SOURCE OF VOLTAGE when the rotary switch is set to Q or 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 OPENCIRCUIT FULLSCALE SHORT CIRCUIT VOLTAGE A VOLTAGE B CURRENT C 200 Q lt 150mV lt 695 pA 2KQ lt 550mV lt 470 pA 20KQ lt 12V lt 700mV lt 95 yA 200 KO lt 750mV lt 10 5 pA 2 MQ lt 800mV sf lt 1 4 pA 2
12. TECTION pA or mA 2A 600V FAST fuse A 15A 600V FAST fuse with gt 10000A interrupt rating 25 7 2 Maximum Inputs FUNCTION INPUT TERMINAL MAXIMUM INPUT REDLEAD BLACKLEAD V vo COM 1000V N va COM 750V Q va COM 600V 4 vo COM 600V vo COM 600V An A COM 10A 600V mA mAUA COM 2A 600V m mAA COM 2A 600V 7 3 General Specifications Display LCD Digital Fuse Protection mA or pA A Storage Temperature Operating Temperature Relative Humidity 26 Counts 2000 Updates 3 times sec 2A 600V HIGH ENERGY FAST FUSE 15A 600V HIGH ENERGY FAST FUSE 20 C to 60 C 4 F to 140 F OC to 45 C 32 F to113 F 0 to 80 0 C to 35 C 32 F to 95 F 0 to 70 35 C to 45 C 95 F to 113 F Temperature Coefficient 0 10 x Specified Accuracy C lt 18 C or gt 28 C lt 64 F or gt 82 F Temperature Coefficient 0 10 x Specified Accuracy C Battery Type Battery Life Size H x W x L Meter Only With Holster Weight Meter Only With Holster Vibration amp Shock Safety Standards lt 18 C or gt 28 C lt 64 F or gt 82 F 9V NEDA 1604 or 6F22 or 006P 350 hrs typical alkaline 4 0 cm x 8 5 cm x 19 0 cm 5 4cm x 10 3 cm x 20 8 cm 380g 655g Designed to MIL T 28899 for a Class I instrument Designed to both IEC 1010 1 Overvoltage Category Il and the EMC Directive UL 1244 CSA C22 2 No 2
13. erated instrument that is designed and tested according to IEC Publication 1010 1 EN 61010 1 Overvoltage Category Il the EMC Directive EN 50081 1 and EN 50082 1 and other safety standards see Specifications Features E Accurate measurements of non filtered rectified AC DC signals E 3 2 digit 2000 count digital display E Manual ranging E Fused 10 Amps range E DC voltage basic accuracy within 0 5 E Date hold E Continuity beeper and diode test E 600 volt input protection on ohm range E Hold and Low battery annunciators E Rubber boot or Safety holster E Large LCD display 68 5mm x 32 7mm 2 SAFETY CONSIDERATIONS 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 Dangerous Voltage Risk of electric shock Alternating Current AC Direct Current DC Either DC or AC Ground Allowable applied voltage range between the input terminal and earth Caution Refer to the user s manual before using this Meter Double Insulation Protection Class Il ob eai e Fuse EA WARNING OBSERVE ALL SAFETY PRECAUTIONS WHEN MEASURING HIGHER VOLTAGES AND OR CURRENTS TURN OFF POWER TO THE CIRCUIT UNDER TEST SET THIS METER TO THE DESIRED FUNCTION AND RANGE CONNECT THE TE
14. he test leads are connected 17 4 3 2 Microwave Didoes Most microwave didoes can not be tested by a DMM with a diode test function This is because the DMM does not supply enough power to turn these diode on We offer an accessory test lead model TL60 that boosts the power output so that microwave didoes can be adequately tested Consult your distributor for more details 4 4 Measuring Current Amps EA CAUTION THE CURRENT FUNCTIONS ARE PROTECTED BY A FUSE OF 600 VOLT RATING TO AVOID DAMAGE TO THE INSTRUMENT CURRENT SOURCES HAVING OPEN CIRCUIT VOLTAGES GREATER THAN 600 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 18 To measure current you must break the circuit and connect the test leads to two circuit connection points The connection must be in series with the current In alternating current measurement waveforms other than sine wave Causes error 19 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 Follow these steps to measure DC or AC Amps 1 Set function and range
15. minus sign will appear on the display at the left Disconnect power to the circuit before removing the test leads from the circuit Three Phase AC Volts This Meter is designed to primarily measure household AC voltage When measuring THREE PHASE circuit line to line the value of the voltage is actually higher than the rated line to ground 3 phase voltage It is very important that you do not exceed the maximum AC RMS rating of this Meter 750V AC 11 To find the RMS voltage line to line on a 3 phase power line multiply the rated line to ground voltage by the square root of 3 approx 1 732 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 Ed CAUTION TURN 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 A KNOWN 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 RESUL
16. rtment Replace the battery Reattach the battery compartment to the back of the Meter and reinstall the screws 21 5 3 Fuse s Test And Replacement 5 3 1 Fuse s Test To 1 test the internal fuses of this Meter Set the rotary switch to position 2 Turn this Meter on 3 5 3 22 To test F2 15A 600v plug a test lead into the VQ input terminal and touch the probe to the A input terminal The display should read about 0 000V If the display reads i overload replace the fuse and test again If the display reads any other value have this Meter serviced To test F1 2A 600V move the probe from the A input terminal to the mAWA input terminal The display should read 0 5V 0 6V If the display reads i overload replace the fuse and test again If the display reads any other value have this Meter serviced 2 Fuse s Replacement Unplug the test leads Remove the rubber boot from the instrument Remove the screws in the rear of the instrument and separate the front and rear housing Replace the fuses s with the same type and size as the one removed Snap the front and rear housing back together and reinstall the Screws Reattach the rubber boot 6 ACCESSORIES NOTE When servicing the Meter use only the replaceable parts specified BT1 Battery 9 Volt FA Fuse 2A 600V RMS F2 Fuse 15A 600V RMS TL1 Test Lead Set C2Y Rubber Boot Yellow 23 7 SPECI
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