User`s Manual for VC88E Digital Multimeter
Contents
1. 1 5 6 ImV AV my 40V 0 5 6 400V Input impedance 400mV Range 10MQ other range is 40MQ 2 3 AC Voltage ACV awo o 40V 0 8 6 Input impedance 400mV Range 1LOMQ other range is 40MQ Frequency response mV and 750V range 40 to 1OOHz other range 40 to 400 Hz Display Sine wave RMS Average value response 2 4 DC Current DCA 400uA 4000uA ILA IOA 1 0 5 TOUA 400mA 100LA MAX measurement voltage drop full range mA 1 2VA 100mV Max input current 20A within 15 seconds 2 5 AC Current ACA 400uA 0 1 a 400QUA in mam 40mA AOA 1545 oa nA I00uA ma am ota MAX measurement voltage drop full range mA 1 2V A 100mV Max input current 20A within 15 seconds Frequency response 20A range 40 100Hz other range 40 to 400Hz 2 6 Resistance Q Ko an 400 4N 40MO 0 2 5d 10KO Open circuit voltage 400mV NOTE With a reading of less than 400 Q place the test leads together to measure the wire resistance then subtract it from the actual measurement lt lt 0 8 4d 1900 IKO 2 7 Capacitance C 40nF 2 5 6d pe 400nF 1OOpr 4uF 3 5 8d InF _ A0uF SONE _ L 400uF G 07o 8d 100NE 2 8 Frequency F 100Hz 1000Hz ki _ Fa FAN CI00kHz AOR 4 0 5 440 oe poki e ae e OM sensitivity 1 OV 2 9 Diode and continuity performance test Range Value displayed esting condition Forward voltage drop of diode Forward DCA is2. measuring AC Voltage Current press it meter switches to Frequency duty cycle Voltage Current When measuring the Frequency it will switch frequency duty cycle to 99 3 Selector Knob Selects measuring function and range 4 Temperature positive and VQHzaH terminal 5 Voltage resistance frequency capacitor and temperature terminal 6 COM terminal 7 Less than 400mA current testing terminal and temperature negative terminal 8 20A current terminal 4 2 DCV measurement 1 Insert the black test lead into COM terminal and the red one into V Q Hz terminal 2 Turn the selector knob to V range 3 Auto range is the normal mode it will display AUTO symbol Press the key to change to the manual range mode 400mV 4V 40V 400V 1000V range is selective 4 Connect the leads in parallel across the electric circuit under test LCD displays polarity and voltage under test connected by the red test lead Note 1 Operator should first set the select knob to the highest range if operator has no idea about the range of voltage under test then select the proper range based on the displayed value If the LCD displays OL it means the meter is over the maximum value of this range select a higher range 2 Never input a voltage over 1000VDC 3 Be careful while measuring a high voltage DO NOT touch the high voltage circuit or test leads 4 3 ACV measurement 1 Insert the black test lead into the COM terminal and
3. User s Manual for VCSSE Digital Multimeter 73999 tonton Do da be aa ba tab D oaseseucbencesens akteses se atoue CITITI kan RANGE REL e _ tee 6 A e FE HziDUTY MAX MIN a a Va Vz A Hi mv OFF OVERVIEW The VC88E digital multimeter is a battery driven 3 94 digital multimeter It uses an LCD with a 23 mm high display for easy reading The automatic overload protection feature makes operation more convenient The digital multimeter has the function of measuring DCV ACV DCA ACA resistance capacitance frequency temperature both Fahrenheit and Celsius duty cycle and diode and a continuity performance test The meter provides an analog bar and unit symbol display data holding function HOLD relative value measuring REL maximal minimal value measuring MAX MIN auto manual range switching RANGE auto power off and warning functions It uses a double integral A D converter as its core It 1s an ideal tool for labs factories radio technology and field use SAFETY NOTES The instrument is designed according to IEC1010 standard safety standard issued by International Electro Technical Committee Please read the following before operation 1 A voltage of less than 36V is a control and safety voltage When measuring voltage higher than 36VDC or 25VAC check the connection and the insulation of the test leads and probes to avoid electric shock 2 Never apply voltage higher than 1000VDC or 750VAC when
4. approx 0 5mA the backward voltage is approx 1 5V Mask Buzzer makes a long sound while resistance An m les ete EN is less than 30 20 Q p 8 Pp CAUTION DO NOT INPUT VOLTAGE IN THIS RANGE 2 10 Temperature 0 C 1 0 4 40 C 1000 C 0 C 400 C 1 020 4 1 C 400C 1 5 15 750 F 0 8 5 Sensor TPO1 K type thermocouple CAUTION DO NOT INPUT VOLTAGE IN THIS RANGE OPERATION 4 1 Panel description 1 LCD displays the measuring value and unit 2 Function key 2 1 key DC AC mode temperature C F Diode Continuity performance switch 2 2 key select auto range or manual range mode Auto range is the normal mode it will display AUTO symbol Press it to change to manual range Press it more than 2 seconds it will return to the auto range mode 2 3 key press it the presently measured value is held on LCD and HOLD symbol displays Press it again HOLD symbol disappears and the meter exits the holding mode 2 4 key press it reading clears and goes to relative value measurement mode REL symbol displays press it again REL symbol disappears and the meter exits the relative mode 2 5 key press it meter goes to MAX mode it will hold the max value of measured reading Press it again goes to MIN mode it will hold the minimum value of measurement No auto power off and analog bar display in this mode Press it more than 2 seconds it exits MAX MIN mode 2 6 key When
5. are better and have a longer service life 5 3 Fit on the battery case and lock the button Note 1 Never input a voltage value higher than 1000VDC or 750VAC 2 Never measure a voltage with the meter selector knob in the current resistance temperature capacitance or diode and continuity range 3 Never use the meter without a battery installed and the back case closed securely 4 15 Trouble shooting If the meter does not work properly check the meter as following M Turn on the power No reading on LCD H Set the HOLD key to a correct mode E Replace battery a signal appears E Replace battery Large Error Value Replace battery These specifications are subject to change without notice a We hereby will not be responsible for any accident and damage caused by improper operation The functions stated in this User Manual cannot be exceeded by special use MB OVCSSE 00 FD
6. comes back as negative leads are reversed Note 1 Operator should first set the selector knob to the highest range if operator has no idea about the range of current under test then select the proper range based on the displayed value 2 Ifthe LCD displays OL it means the current is over range You need to move the selector knob to a higher range 3 Maximum input current is 400mA or 20A based on the terminal the red test lead is inserted into too large a current will damage the meter 4 5 ACA measurement 1 Insert the black test lead into the COM terminal and the red one into the mA terminal maximum 400mA or into the 20A terminal maximum 20A 2 Use the selector knob to set the proper ACA range press the DC AC key to select the measurement mode then connect the leads in series to the electric circuit under test LCD displays current under test Note 1 Operator should first set the selector knob to the highest range if operator has no idea about the range of current under test then select the proper range based on the displayed value 2 If the LCD displays OL it means the current is over range You need to select a higher range 3 Maximum input current is 400mA or 20A based on the terminal the red test lead is inserted into too large a current will damage the meter 4 6 Resistance measurement 1 Insert the black lest lead into the COM terminal and the red lead into the V O Hz terminal 2 Turn th
7. e 2 Only use the TPOI probe or the temperature accuracy isn t guaranteed 3 Never input voltage at temperature range 4 Never use the TPOI probe to determine the temperatures of liquids or vapors since it can cause an internal short circuit in the meter 4 12 Data holding 1 The presently measured value is held on the LCD and the symbol displays Press the button again the HOLD function is cancelled 4 13 Auto power off 1 When the meter has not been used for about 15 minutes the built in buzzer will sound 5 times and the meter goes into sleeping mode minute later the buzzer sounds a long tone 1 time and the meter powers off Press any key to restart the power 4 14 Meter maintenance The VCVC88E is a high accuracy precision instrument please do not attempt to modify any of the internal circuits 1 Keep the meter away from water dust and shock 2 Do not store and operate the meter under extremes of high temperature high humidity combustibles explosives and strong magnetic areas 3 Wipe the case with a damp cloth and a mild detergent do not use abrasives and alcohol 4 If do not operate the meter for a long time you should take out the batteries to avoid leakage corrosion and damage to the meter 5 When the symbol displays you should replace the battery following the steps 5 1 Unlock the button and remove the battery case 5 2 Take out the old batteries and replace with new ones Alkaline batteries
8. e selector knob to Q range 3 Connect the leads in parallel with the resistance being measured 3 Auto range is the original mode press the RANGE key change to the manual range mode 4 When measuring the actual minimum resistance short circuit the test leads first press the button and then test the resistance it will now display the actual resistance Note 1 The LCD displays OL when the resistance is over the selected range When measuring a value over IMO the reading will take a few seconds to become stable This is normal for high resistance measuring 2 When the input lead is in an open circuit overload displays OL 3 When measuring in circuit resistors be sure that the power is off and all capacitors are completely discharged 4 Never input any voltage while the meter is set for resistance range 4 7 Capacitance measurement 1 Discharge any capacitor to be tested by shorting the terminals of the capacitor with an insulated device 2 Turn the selector knob to HH range 3 Insert the black lest lead into the COM terminal and the red lead into the V Q Hz terminal 4 If the LCD doesn t display 0 press the button to clear the reading 5 Place the test leads in parallel with the capacitor being tested The red test lead is for the positive pole The LCD displays the capacitance value Note 1 Never input voltage or current to the VQHz terminal when measuring capacitance 2 In order to assure an acc
9. est lead to the diode cathode polarity the reading is the approximate value of the diode s forward voltage drop 3 With the red test connected to the diode cathode polarity and the black test lead to the diode positive polarity the LCD will display OL 4 This will complete diode testing including forward and backward measurement if the desired result isn t met by performing the above tests it means the diode 1s bad 4 10 Continuity performance test 1 Insert the black test lead into the COM terminal and the red one into the V Q Hz terminal 2 Turn the selector knob to gt range press the key to select the continuity measurement mode 3 Place the test leads onto two points of the tested circuit if the inner buzzer sounds the resistance is less than 50Q Note Never input voltage at W range 4 11 Temperature measurement 1 Turn the selector knob to the C F range 2 Using the TPOI temperature probe insert the cathode black pin of the cold end free end of the probe into the mA terminal jack and the anode red pin into the VQHz terminal Put the working end temperature measurement end of the thermocouple on the surface or inside the object to be tested Read the temperature from the screen and the data is in Centigrade 3 Press the key to select Fahrenheit the data is in degrees Fahrenheit Note 1 When the input terminal is in ambient air it will display the ambient temperatur
10. measuring 3 Be careful when measuring a voltage higher than 60VDC or 40VAC 4 Select the correct function and range to avoid faulty operation 5 Move the test leads away from test points when switching functions 6 Never input voltage when measuring current 7 Never modify the meter s internal circuits 8 Code for safety symbols AN high voltage present GND DI dual insulation refer to manual Low battery SPECIFICATIONS 1 General features 1 1 Display LCD 1 2 Max display 3999 3 4 digits automatic polarity and unit symbol display 1 3 Measurement method double integral A D conversion 1 4 Sampling rate approximately 3 times per sec 1 5 Over range display OL displayed in the highest digit 1 6 Low battery display 1 7 Working environment 0 C to 40 C relative humidity less than 80 1 8 Power supply 2 pieces 1 5V battery AAA 7 battery 1 9 Dimension 7 5 inches x 3 3 inches x 1 28 inches length x width x height 1 10 Weight approximately one pound including battery 1 11 Accessories test leads user manual TPO1 temperature probe rubber holster FSO1 flame safeguard adapter carry case alligator clips with boots and 2 each 1 5V battery TECHNICAL FEATURES 2 1 Accuracy a x reading data digits environment temperature at 23 C 5 relative humidity less than 75 2 2 DC Voltage DCV 400mV
11. the red one into the V Q Hz terminal 2 Turn the selector knob to V range 3 Auto range is the normal mode it will display AUTO symbol Press the RANGE key to change to the manual range mode 400mV 4V 40V 400V 750V range is selective Note When measuring ACV under auto range mode pressing the key will display AC mV range 4 Connect the leads in parallel across the electric circuit under test LCD displays voltage as measured by the test leads Note 1 Operator should first set the selector knob to the highest range if operator has no idea about the range of voltage under test then select the proper range based on displayed value If the LCD displays OL it means the meter is over the maximum value of this range select a higher range 2 Never input a voltage over 75OVAC 3 Be careful while measuring a high voltage DO NOT touch the high voltage circuit or leads 4 4 DCA measurement 1 Insert the black test lead into the COM terminal and the red one into the mA terminal the Max 400mA or into the 20A terminal the Max 20A 2 Use the selector knob and set to the proper DCA range press the key to select the measurement mode Then connect the leads in series into the electric circuit under test LCD displays current under test 3 When measuring mA DC through a control jack use the FSO1 adapter between the meter leads and the control jack Insertion of leads into adapter is not important If reading
12. urate reading press the button to clear the reading before testing 3 There is only an auto range mode for testing capacitors 4 The capacitors must be complete discharged before testing to protect the meter 5 A reading over the 400uF range will delay 15 seconds 4 8 Frequency measurement 1 Insert the black lest lead into the COM terminal and the red one into the V Q Hz terminal 2 Turn the selector knob to the Hz range 3 Place the test leads to the power source or the load which 1s to be tested 4 Press the key to switch frequency duty cycle it will display the frequency or duty cycle of the signal source which is tested Note 1 There is only an auto range mode under the frequency mode 2 The meter can still work if the input is higher than 10Vrms but the accuracy is not guaranteed 3 In a noise environment you should use shielded cable to measure a low signal 4 When measuring high voltage circuits no part of your body should touch the high voltage circuit 5 Never input a voltage higher than 250VDC or AC peak value or it may damage the meter 4 9 Diode performance test 1 Insert the black test lead into the COM terminal and the red one into the V Q Hz terminal the polarity of the red lead is 2 Turn the selector knob to gt range press the key to select the measurement mode Connect the test leads to the diode being tested the red test lead connects to the diode positive polarity the black t
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