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1. Read LCD display NOTE 1 For resistance above 1MQ the meter may take a few seconds to stabilize reading 2 When the input is not connected i e at open circuit the figure 1 will be displayed for the overrange condition 3 When checking in circuit resistance be sure the 6 circuit under test has all power removed and all capacitors are full discharged 4 At 200MQ range display is 1000 counts when test leads are shorted These counts have to be subtracted from measuring results For example when measuring 100MQ resistance the reading will be 110 00 and the correct measuring result should be 110 0 0 10 00 100 00MQ 3 4 MEASURING FREQUENCY 1 Connect the black test leads to the COM jack and the red test lead to the V Q Hz jack 2 Set the rotary switch at 20KHz position and connect test leads across the source or load under measurement NOTE 1 Reading is possible at input voltages above 10Vrms but the accuracy is not guaranteed 2 In noisy environment it is preferable to use shield cable for measuring small signal 3 5 MEASURING CAPACITANCE 1 Set the rotary switch at desired F position 2 Before inserting capacitor under measurement into capacitance testing socket be sure that the capacitor has been discharged fully 3 When measuring capacitors with shorter leads a testing adapter is provided with the meter Insert the adapter into the capacitance testing socket on the front 7 panel
2. or rms AC mA mA 200mA DC or rms AC A A 10A DC or rms AC continuous 20A for 15 seconds maximum 3 OPERATING INSTRUCTION 3 1 MEASURING VOLTAGE 1 Connect the black test lead to the COM jack and the red test lead to the V Q jack 2 Set the rotary switch at the desired or V range position and connect test leads across the source or load under measurement 3 Read LCD display The polarity of the red connection will be indicated when making a dc_ voltage measurement 4 When only the figure 1 is displayed it indicates overrange situation and the higher range has to be selected 25 3 2 MEASURING CURRENT 1 Connect the black test lead to the COM jack and the red test lead to the mA jack for a maximum of 200mA For maximum of 20 move the red lead to the 10A jack 2 Set the rotary switch at desired A or A range position and connect test leads in series with the load under measurement 3 Read LCD display The polarity of the red lead connection will be indicated when making a DC measurement 4 When only the figure 1 displayed it indicates overrange situation and the higher range has to be selected 3 3 MEASURING RESISTANCE 1 Connect the black test lead to the COM jack and the red test lead to the V Q Hz jack NOTE The polarity of red lead connection is positive 2 Set the rotary switch at desired Q range position and connect test leads across the resistance under measurement
3. safety standards can be guaranteed only if used with test leads supplied If necessary they must be replaced with the same model or same electronic ratings Measuring leads must be in good condition 1 2 DURING USE X Never exceed the protection limit values indicated in specifications for each range of measurement X When the meter is linked to measurement circuit do not touch unused terminals X When the value scale to be measured is unknown beforehand set the range selector at the highest position X Before rotating the range selector to change functions disconnect test leads from the circuit under test X When carrying out measurements on TV or switching power circuits always remember that there may be high amplitude voltages pulses at test points which can damage the meter X Never perform resistance measurements on live circuits X Always be careful when working with voltages above 60V rms Keep fingers behind the probe barriers while measuring 1 3 SYMBOLS Important safety information refer to the operating manual A Dangerous voltage may be present L Earth ground E Double insulation Protection class 1 4 MAINTENANCE X Before opening the meter always disconnect test leads from all sources of electric current X For continue protection against fire replace fuse only with the specified voltage and current ratings F1 2A 250V F2 10A 250V X If any faults or abnormalitie
4. to continue measurements WARNING To avoid shock be sure the capacitor measuring adapter has been removed before changing to another function measurement 3 6 TESTING DIODE 1 Connect the black test lead to the COM jack and the red test lead to the V Q jack NOTE The polarity of red lead connection is positive 2 Set the rotary switch at position and connect the red lead to the anode the black lead to the cathode of the diode under testing The meter will show the approx Forward voltage drop of the diode If the lead connection is reversed only figure 1 be displayed 3 7 TESTING TRANSISTOR 1 Set the rotary switch at hFE position 2 Identify whether the transistor is NPN or PNP type and locate Emitter Base and Collector lead Insert leads of the transistor to be tested into proper holes of the testing socket on the front panel 3 LCD display will show the approximate hFE value at the test condition of base current 10 3 2 3 8 TESTING CONTINUITY 1 Connect the black test lead to the COM jack and the red test lead to the V Q jack 2 Set the rotary switch at position connect test leads across two points of the circuit under testing If continuity exists resistance less than about 700 built in buzzer will sound 4 SPECIFICATIONS Accuracy is specified for a period of one year after calibration and at 18 C to 28 C 64 F to 82 F with relative
5. 0 Sensitivity 200mV rms and input no more 10V rms 4 5 CAPACITANCE Range Resolution 2000pF 0 1pF 20nF 1pF 200nF 10pF 4 0 20 2uF 0 1nF 20uF inF 4 6 DC CURRENT Range Resolution Accuracy Burden voltage 2mA 0 1uA 0 5 5 110mV mA 20mA 1pA 0 56 5 15mV mA 200 10 0 8 5 5 0mV mA 10A imA 2 0 10 0 03V A 4 7 AC CURRENT Range Resolution Burden voltage 2mA 0 1uA 0 8 10 110mV mA 20mA 1pA 0 8 10 15mV mA 200 10uA 12 10 5 0mV mA 10A imA 25 10 0 03V A Frequency Range 40Hz to 400Hz Response Average calibrated in rms of sine wave S443 4 8 RESISTANCE Range Resolution 2000 0 010 0 5 10 2KQ 0 10 03 3 20KQ 10 03 1 200KQ 10Q 03 1 2MQ 1000 0 3 1 20MQ 1KQ 0 5 1 5 0 of ROOMA 10KO rdg 1000digits 20 Note On 200MQ range if short input display will read 1 this 1MQ should be subtracted from measurement results 5 ACCESSORIES 5 1 SUPPLIED WITH THE MULTIMETER Test leads Electric Rating 1500V 10A 1 couple Battery 9V NEDA 1604 or 6F22 1 pcs Operating Manual Holster Capacitance Testing Adapter 1 pcs 1 pcs 1 pcs 5 2 HOW TO USE THE HOLSTER The holster is used to protest the meter and to make the measurement more comfortable it comes with tow stands installed together The figure shows how to us
6. DIGITAL MULTIMETER 0 0 0 0 0 0 0 0 0 9 00 USER S MANUAL oOo 0 0 0 000 7 CONTENTS 1 SAFETY 1 2 DESCRIPTION men oi names ne 3 3 OPERATING INSTRUCTION 5 3 1 Measuring 5 3 2 Measuring current 6 3 3 Measuring 6 3 4 Measuring frequency 7 3 5 Measuring 7 3 6 Testing diode 3 7 Testing transistor 3 8 Testing continuity 8 4 9 5 12 6 BATTERY amp FUSE 13 1 SAFETY INFORMATION This multimeter has been designed according to IEC 1010 concerning electronic measuring instruments with an overvoltage category CAT II and pollution 2 Follow all safety and operating instructions to ensure that the meter is used safely and is kept in good operating condition 1 1 PRELIMINARY X When using this meter the user must observe all normal safety rules concerning Protection against the dangers of electrical current Protection of the meter against misuse Full compliance with
7. e 12 the holster to A Support the meter with a standard angle B Support the meter with a small angle using the little stand C Hang the meter on the wall using the little stand Take the little stand off from the back side of the large and insert it into holes located upper on the holster D hold test leads 6 BATTERY amp FUSE REPLACEMENT If the sign Ea appears on the LCD display it indicates that battery should be replaced Remove screws on the back cover and open the case zig Replace the exhausted battery with a new one Fuse rarely need replacement and blow almost always as a result of the operator s error Open the case as mentioned above and then take the PCB out from the front cover Replace the blown fuse with same ratings A WARNING Before attempting to open the case be sure that test leads have been disconnected from measurement circuits to avoid electric shock hazard For protection against fire replace fuse only with specified ratings 200mA 250V quick acting 14 WLS027
8. humidity to 80 Accuracy specifications are given as of reading number of least significant digits 4 1 GENERAL MAXIMUM VOLTAGE BETWEEN TERMINALS AND EARTH GROUND 1000V DC or 700 rms AC sine FUSE PROTECTION A 2A 250V 10A 10A 250V POWER SUPPLY 9V battery NEDA 1604 or 6F22 DISPLAY LCD 19999 counts MAX updates 2 3 sec MEASURING METHOD Dual slope integration A D converter OVERRANGE INDICATION 1 figure only on the display POLARITY INDICATION displayed for negative polarity LOW BATTERY INDICATION E4 displayed OPERATING TEMPERATURE 0 C to 40 C 32 F to 104 F 9 STORAGE TEMPERATURE 10 C to 50 C 14 F to 122 F DIMENSION 91 189 31 5 WEIGHT 310g including battery 4 2 DC VOLTAGE Range Resolution 200mV 0 1mV 0 05 rdg 5 digit 2V imV 0 1 of rdg digit 20V 10mV 0 1 of rdg digit 200V 100mV 0 1 of rdg 3 digit 1000V 1V 0 15 rdg 5 digits Input Impedance 10 4 3 AC VOLTAGE Accuracy Range Resolution 2V 0 1mV 0 6 10 1 0 10 20V 1mV 0 6 10 1 0 10 200V 10mV 0 6 10 1 0 10 700V 0 1V 0 8 10 1 2 15 Input Impedance 10 Frequency Range 40Hz to 400Hz Response Average calibrated in rms of sine wave 4 4 FREQUENCY Range Resolution Accuracy 20kHz 1Hz 15 5 1
9. s are observed the meter can not be used any more and it has to be 2 checked out X Never use the meter unless the back cover is in place and fastened fully X To clean the meter use a damp cloth mild detergent only do not use abrasives or solvents on it 2 DESCRIPTION This meter is a portable professional measuring instrument with 3 1 2 digits LCD capable of performing functions DC voltage measurement 5 ranges from 200mV to 1000V AC voltage measurement 4 ranges from 2V to 700V DC current measurement 4 ranges from 2mA to 10A AC current measurement 4 ranges from 2mA to 10 Resistance measurement 7 ranges from 2000 to 200MQ Capacitance measurement 5 ranges from 2000pF to 20uF Diode test Transistor test Audible continuity test NAMES OF COMPONENTS 1 Power Switch 2 Data hold key 3 Capacitance measurement socket 4 10A input jack 23 5 mA input jack 6 COM Input Jack 7 V Q Hz Input Jack Input Jack 8 Rotary Switch 9 Transistor Testing Socket 10 LCD Display 2 3 INPUT JACKS This meter has four input jacks that are protected against overload to the limits During use connect the Sais black test lead to the COM jack and red test lead as shown below FUNCTION _ RED LEAD INPUT LIMITS CONNECTION DCV ACV V Q Hz 1000 DC or 750V rms AC Q V Q Hz 250V DC or rms AC V Q Hz 250V DC or rms AC Hz Q Hz 250V DC
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