VICTOR 88C User`s Manual for VICTOR 88C Digital Multimeter
Contents
1. inductance Lx triode and temperature 7 Jack for current 20A Please refer to the figure H A oban da mer mA u COM siii oe 5 2 Voltage measurement 1 Insert the black pencil into the COM jack and the red one into the V Q Hz jack 2 Turn the switch to position V If the level of voltage to be measured is unknown then select the biggest range and then decrease the range step by step until getting the value with the highest resolution 3 Popup the key DC AC to enter into DC mode if measuring DC Press down the key DC AC to set into AC mode 4 The screen will show the voltage measured if touch the testing point using the pencils the point touched by the red pencil is in positive voltage if the value showed is positive Notice 1 As showed OL indicates the range is over and shall switch to a higher range 2 The voltage to be tested shall not over DC 1000V or AC 750V The pencils shall be away from the testing point as switching functions or ranges 3 When measuring high voltage circuit any parts of your body should not touch the high voltage circuit otherwise it may hurt your body 5 3 Current measurement 1 Insert the black pencil into the COM jack and the red one into the mA or 20A jack 2 Turn the switch to position A If the level of current to be measured is unknown then select the biggest range and then decrease the range st2. 0 C 2 3 9 Frequency f 20kHz 10KHz 0 5 4 Input sensitivity higher than 3 5V Vp p Over load protection 250V DC or AC peak value less than 10 seconds 2 3 10 Diode and open circuit test Value displayed Test condition all pods wad voltage A E A drop Unit mV 1mA reverse voltage about 3V Buzzer sounds continuously resistance Open circuit voltage between two test points is about 3V is less than 700 200Q Over load protection 250V DC or AC peak value Warning Never input voltage in this range 2 3 11 Measuring triode s hFE parameter range base electrode current is hFE NPN or PNP O 1000 about 10uA and Vce is about 3V V Operation method 5 1 Operation panel introduction 1 LCD display the measured value and the unit 2 Function keys 2 1 Power switch turn on turn off power 2 2 PK HOLD Pressing this key will hold all max value measured in the screen showing sign PH press again PH will disappear and exit the status of peak value holding 2 3 B L switch to enable backlight which will be turned off auto after about 5 seconds 2 4 DC AC select DC AC working mode 3 Rotary switch to change measurement function and range 4 Jack for measurement of voltage resistance and frequency 5 Common ground positive input for capacitance Cx inductance Lx triode and temperature 6 Positive jack for current lower than 200mA negative input for capacitance Cx
3. C insert the cathode black pin of cold end free end of thermocouple into mA jack anode red pin into COM jack put the working end temperature measurement end of thermocouple on the surface or inside the object to be tested Then you can read temperature from the screen and the data is in centigrade Notice 1 As the input end is open it will show environment temperature if the operation temperature is higher than 18 C or normal temperature if lower than 18 C 2 Please never replace temperature sensor or the accuracy is not guaranteed 3 Never input voltage if in temperature mode 5 8 Frequency measurement 1 Insert pencils or shielded cable into COM and V Q Hz jack 2 Turn range switch to frequency position and bridge pencils or cables over the signal source or load tested Notice 1 The device can still work if the input is higher than 10V virtual value but the accuracy is not guaranteed 2 In noise environment you d better use shield cable to measure small signal 3 When measuring high voltage circuit any parts of your body should not touch the high voltage circuit otherwise it may hurt your body 4 Never input voltage higher than 250V DC or AC peak value otherwise it may damage your device 5 9 Triode hFE 1 Turn the range switch to hFE position 2 Insert testing accessory into mA and com jack Please pay attention to the polarity as the com for po
4. Contents eS CIMINO air cceceesaneee Il For purchasers of this multimeter Il Unpacking inspection ccc cece e eee PV POAUUNGS ciuvaceecaacresneesctescoeneeeedeesetesetas V Operation method cc cece eee e ence ees VI Device maintenance ccceeee eee ees VIL Trouble SNOOT 2cccoce sess caicncecsconeeeeniiwseeeieas Il Summary This series product is a stable and battery driven 3 1 2 digital multimeter with high reliability It adopts LCD screen with character height of 28mm with functions including unit sign backlight and overload protection it is easy to use This series of device can be used to measure DCV ACV DC AC resistance capacitance inductance diode triode open circuit temperature and frequency as well as hold peak value As an instrument with excellent performance it adopts double integral A D converter as its core ll For purchasers of this multimeter 1 Safety notice This series of device is designed according to IEC1010 standard safety standard issued by International Electrotechnical Committee Please read these safety notices before using it 1 1 Never input DC higher than 1000V or AC higher than 750V virtual voltage as measuring voltage 1 2 The voltage lower than 36V is safe Please confirm the earthing connection and isolation of pencils to avoid electric shock when measuring the voltage of DC higher than 36V or AC higher than 25V 1 3 Pencil
5. ce for any change of this manual We have tried our best to confirm the correction of this manual s content If you find any mistake or omit please contact us We will not be responsible for any accidents or damages caused by miss operation Functions described in this book can not be used as reason for special purpose MB 0088 30
6. eading data character number ensure in accuracy environment temperature 23 5 C relative humidity lt 75 and the calibration warranty period lasts for one year from the date of leaving the factory 2 2 Performance A indicates the function is available for this model Function a E a re eee ry Oo a Diode Open circuit Oo ae Triode hFE Oo A Capacitance C A y O Temperature Ca Frequency of A Inductance L A O Auto power off dl A O Backlight A O Peak value holding A ___ 2 3 Technical index 2 3 1 DCV 200mV 100uV yv im ns 200V 100mV 1 1000V 1 0 5 Input impedance All range is10MQ Over load protection 250V DC or 205 V AC peak value for range 200mV 1000V DC or 1000V AC peak value for other 2 3 2 ACV Input impedance All range is10MQ 0 8 5 Over load protection 250V DC or 205 V AC peak value for range 200mV 1000V DC or 1000V AC peak value for other Frequency response 40 400Hz for range under 200V 40 100Hz for range 750V Display Sine wave virtual value AVG value response 2 3 3 DCA A 4 0 8 3 200mA 1 2 4 100uA 2 0 5 MAX measurement voltage drop 200mV Max input current 20A no more than 10 seconds Over load protection 0 2A 250V self healing fuse for ranges under 200mA 12A 250V quick acting fuse for range 20A 2 3 4 ACA ane 200mA 2 0 5 100uA 3 0 10 MAX measurement voltage drop 200mV Max input c
7. ep by step until getting the value with the highest resolution 3 Popup the key DC AC to enter into DC mode if measuring DC press down the key DC AC to set into AC mode 4 The screen will show the value of current measured if connect in parallel the pencil to the circuit to be tested the point touched by the red pencil is in positive voltage if the value showed is positive Notice 1 As showed OL indicates the range is over and shall switch to a higher range 2 The input in mA jack shall not over 200mA and 20A not over 20A less than 10 seconds of testing duration as measuring current the pencils shall be away from testing points as switching function or range 5 4 Resistance measurement 1 Insert the black pencil into the COM jack and the red one into the V OQ Hz jack 2 Turn the range switch to resistance position then bride two pencils at the two ends of the resistor Notice 1 OL will be displayed in screen if the resistance is over the range then you shall increase the range by one step 2 When input is open circuit it will display status of overload 3 When measuring resistance on line ensure that all power of circuit tested are turn down and all capacitor are discharged completely 4 Never input voltage if in resistance measurement mode 5 It normal for resistance higher than 1MQ that the reading data is not stable for the first several seconds 5 5 Ca
8. ernal circuit by your self 6 1 Pay attention to the waterproof dustproof and breakproof of the device 6 2 Please do not store or use it in environment of high temperature high humidity high flammability or strong magnetic 6 3 Please clear the device using wet cloth and soft detergent and abrasive and drastic solvent such as alcohol are forbidden 6 4 Please take out battery to prevent device from being eroded by battery weeping if the device will not be used for a long time 5 4 1 Be care of the status of batteries When sign is showed in screen please replace batteries 6 4 1 1 Remove vibration proof sheath screw out nut that fixing battery lid and remove battery cap 6 4 1 2 Take off 9V batteries replace with new one It is recommended to use alkaline battery for long time of operation even any 9V battery is adoptable 6 4 1 3 Close the battery cap and tighten the screws refer to Figure 2 6 4 1 4 Take on vibration proof sheath 6 4 2 Replacing fuse Please replace fuse with an identical one if necessary VII Trouble shooting If you device can not work normally the methods bellow may help you to solve general problems If these methods do not work please contact service center or dealer Inspection area and method symptom E Power is not on Holding switch E Replacing batte No display appears input Too great E Replacing battery error displayed We will not give a further noti
9. pacitance measurement 1 Switch to a proper range and insert pencils into mA and com jack 2 Connect the two pencils in parallel to the two ends of the capacitor Please pay attention to the polarity as the com for positive and mA for negative Notice 1 If capacitance exceeds the range selected OL will be displayed in screen then you shall increase the range by one step 2 The LCD may show some rudimental digits upon the starting of capacitance measurement It s normal and will not affect the testing result 3 If there is serious creepage or capacitor broken down in high capacitance range the digits showed will be random and unstable 4 Please discharge capacitor completely to avoid device damage before measuring capacitance 5 6 Inductance measurement 1 Switch to a proper range and insert pencils into mA and com jack 2 Bridge the pencils on the two ends of inductor Notice 1 If inductance exceeds the range selected OL will be displayed in screen then you shall increase the range by one step 2 The inductance value measured for identical inductor may be different if there is different impendence 3 If in range 2mH please short pencils and measure lead inductance and then subtract the inductance from the value measured 4 Avoid measuring small inductor in high range or the accuracy is not guaranteed 5 7 Temperature measurement Turn range switch to
10. s should be away from test points when switching function or range 1 4 Select correct function and range and beware of miss operation You may still be careful to ensure the safety even the device has range protection functions 1 5 Never input current higher than 20A when measuring current 1 6 Introduction for safety sign Earthing E Double isolation A Shall refer to the user s manual ex Low battery Ill Unpacking inspection Open the package to check if all parts and accessories are all right A Dangerous voltage existing in the box 1 Multimeter 1 2 Battery 9V 1 3 Leather case 1 4 Vibration proof sheath 1 5 Acceptance certificate 1 6 Crocodile clip 1 pair 7 Temperature probe banana type 1 pair 8 Testing accessory 1 9 Pencil 20A 1 pair 10 User s manual 1 IV Features 1 General features 1 1 Display mode LCD 1 2 Max display 1999 3 1 2 digits automatic polarity display 1 3 Measurement method double integral A D conversion 1 4 Sampling rate about 3 time per second 1 5 Over range display the highest digit displays OL or OL 1 6 Low voltage display c 1 7 Working environment 0 40 C relative humidity lt 80 1 8 Power supply one 9V battery 6F22 or equivalent model 1 9 Dimension 189mm 97mm 35mm length width height 1 10 Weight about 400g including 9V battery 2 Technical features 2 1 Accuracy a x r
11. sitive and mA for negative 3 To determine the triode s type NPN or PNP insert the emitting base and collector electrode into the corresponding jacks in testing accessory 5 10 Diode and open circuit test 1 Insert the black pencil into COM jack and the red one into the V Q Hz jack Notice the red pencil is anode 2 Turn the range switch to position connect pencils in parallel to the diode tested with the red pencil to the anode and the black to cathode then the reading value will be approximate forward voltage drop of the diode 3 Connect pencils to two points of the circuit to be tested if buzzer sounds then the resistance between the two points is lower than 70 20 Q 5 11 Peak value holding Press HOLD the peak value of current data will be keep displaying in screen press again to cancel this function 5 12 Auto power off After about 20 10 minutes device not being used it will be powered off automatically and enter into dormant status and press POWER again for two times to turn on power 5 13 Backlight Press B L key to turn on backlight After 20 seconds the backlight will be turn down automatically Notice When backlight is bright working current becomes higher and it will short the service life of battery and the error for some other functions will increase VI Device maintenance This series of device is a kind of precise instrument please do not change the int
12. urrent 20A no more than 10 seconds Over load protection 0 2A 250V self healing fuse for ranges under 200mA 12A 250V quick acting fuse for range 20A Frequency response 40 200Hz Display Sine wave virtual value AVG value response 2 3 5 Resistance Q Accurac 100 0 8 3 5 i 3X 10 20 Open circuit voltage lower than 3V Over load protection 250V DC or AC peak value Caution a If in range 200Q please short pencils and measure lead resistance and then subtract the resistance from the value measured b Itis normal to show 10MQ when pencils shorted in range 2000MQ it will not effect the accuracy and shall be subtracted from the value measured For example The object resistance is 1000MQ the reading value is 1010MQ then the correct value shall be 1010 10 1000MQ c Lagged showing of value is normal when measuring resistance higher than 1MQ Please wait until the display is stable 2 3 6 Capacitance C Accurac Resolution 10pF 100pF 2 5 20 200nF 20uF fF 200uF 5 0 5 100nF Testing frequency 100Hz Over load protection 36V DC or AC peak value 2 3 7 Inductance L 2mH 20mH 200mH 2 5 20 20H Testing frequency 100Hz 2 3 8 Temperature C 1 5 15 2 400 C Thermocouple plug of banana type 2kHz 200kHz 100Hz 2000kHz Over load protection 36V DC or AC peak value z 20 1000 C 1 0 4 lt 40
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