Victor VC830L User manual

DIGITAL MULTIMETER OPERATION MANUAL
1. General
The instrument is a pocket digital multimeter, which is used to measure DCV, ACV, and DCA, resistance, diode and continuity
test. It is an ideal tool for labs, household and wireless enthusiasts.
2. Safety Notes
1. Do not input a limit alue o er the range when measuring.
2. When measuring oltage higher than 36V DCV, 25V ACV, check the connection and insulation of the test leads to a oid
electric shock.
3. Keep the test leads away from the testing point when con erting function and range.
4. Don’t add oltage to the input terminal when measuring resistance.
3. Specification
1. General Features
1-1. Displaying: 22mm digit height LCD display.
1-2. Max. Indication: 1999 (31/2) auto polarity indication.
1-3. Sampling rate: approx. 3 times/ sec
1-4. O er Range Indication: MSD displays "1"
1-5. Low Battery Indication: " " symbol displays.
1-6. Operation En ironment: (0～40) , relati e humidity ℃＜80% .
1-7. Power: 9V battery (NEDA1604/6F22 or equi alent)
1-8. Measurement: 145×85×30mm (Length×Width×Height)
1-9. Weight: Approx. 170g (including a 9V battery)
1-10. Accessories: Operation Manual, Product Certificate, Packing box, Test leads and a 9V battery.
2. Technical Features
Accuracy: ± (a%×reading+d)
Surrounding: (23±5) , relati e humidity℃＜75%. One year warranty since the date of manufacture.
2.1 DCV
Range Accuracy Resolution
200mV ±(0.5%+4) 100uV
2V 1mV
20V 10mV
200V 100mV
600V ±(1.0%+5) 1V
Input impedance: 1MΩfor all ranges.
2.2 ACV
Range Accuracy Resolution
200V ±(1.2%+10) 100mV
600V 1V
Input impedance: 1MΩ.
Frequency Response: (40～200)Hz
2.3 DCA
Range Accuracy Resolution
20uA ±(1.5%+3) 0.01uA
200uA 0.1uA
2mA 1uA
20mA 10uA
200mA 100uA
10A ±(2.0%+5) 10mA
Max. Input current: 10A (no more than 6 seconds)

O erload Protection: 0.2A/250V; 10A/250V fuse.
2.4 Resistance
O erload Protection: 250V DC/AC peak alue
Note: At range 200Ω, first short-circuit the meter pens to measure the wire resistance. Then subtract it from the real
measurement.
2.5 Diode and continuity test
Range Display Testing Condition
Forward oltage drop of diode Forward DCA is approx. 1mA，
Backward oltage is apporx.3V
Buzzer makes a long sound while resistance is
less than (70±20)Ω
Open oltage is approx.3V
O erload Protection: 250V DC/AC peak alue
2. DC Voltage Measurement
1. Apply the black test lead to "COM" terminal and the red test lead to “V/Ω” terminal.
2. Set the knob to a proper DCV range, and connect the test leads crossly to the electric circuit under test. LCD displays polarity
and oltage under test connected by the red test lead.
Note:
1. Firstly, the knob should be set to the highest range if users ha e no idea about the range of oltage under test. Then select the
proper range based on display alue.
2. If MSD displays “1", it means the meter is o er range. Please set the knob to a higher range.
3. Do not attempt to input oltage o er 600V. Otherwise, it may damage the circuit of the meter.
4. A oid touching high oltage circuit when measuring it.
2.7 AC Voltage Measurement
1. Apply the black test lead to "COM" terminal and the red test lead to “V/Ω” terminal.
2. Set the knob to a proper ACV range, and connect the test leads crossly to the electric circuit under test.
Note:
1. Firstly, the knob should be set to the highest range if users ha e no idea about the range of oltage under test. Then select the
proper range based on display alue.
2. If MSD displays “1", it means the meter is o er range. Please set the knob to a higher range.
3. Do not attempt to input oltage o er 600Vrms. Otherwise, it may damage the circuit of the meter.
4. A oid touching high oltage circuit when measuring it.
2.8 DC Current Measurement
1. Apply the black test lead to "COM" terminal and the red test lead to “V/Ω” terminal (max. 200mA), or put the red test lead to
"10A" terminal (max. 10A).
2. Set the knob to a proper DCA range, and connect the test leads in series to the electric circuit under test. LCD displays
polarity and current alue under test connected by the red test lead.
Note:
1. Firstly, the knob should be set to the highest range if users ha e no idea about the range of oltage under test. Then select the
proper range based on display alue.
2. If MSD displays “1", it means the meter is o er range. Please set the knob to a higher range.
3. The max input current is 200mA or 10A (depends on the insert position of the red meter pen). Excessi e current will melt the
Range Accuracy Resolution
200Ω ±(0.8%+5) 0.1Ω
2kΩ
±(0.8%+3)
1Ω
20kΩ 10Ω
200kΩ 100Ω
20MΩ ±(1.0%+15) 10kΩ

fuse. When measuring, if the meter has no reading display, please check rele ant fuse.
2.9 Resistance Measurement
1. Apply the black test lead to "COM" terminal and the red test lead to “V/Ω” terminal.
2. Set the knob to a proper resistance range, and connect the leads crossly to the resistance under test.
Note:
1. The LCD displays "1" when the resistance is o er the selected range. The knob should be adjusted to a higher range. When
resistance under test is o er 1MΩ, the reading shall be stable in a few seconds, which is a normal status when measuring high
resistance.
2. When the input terminal is in open circuit, it displays o erload.
3. When measuring in line resistor, be sure that the power is off and all capacitors are released completely.
4. It is absolutely forbidden to input oltage at the range of resistance, though the meter has oltage protection function at this
range.
2.10 Diode Test
1. Apply the black test lead to "COM" terminal and the red lead to "V/Ω" terminal (the polarity of red lead is “+”)
2. Set the knob to“ ”range, connect test leads to the diode under test. The red test lead connects to diode positi e polarity
and the reading is the approx. alue of diode forward oltage drop.
2.11Continuity Test
Set the knob to“ ”range, apply test leads to the two points of tested circuit. If the inner buzzer sounds, the resistance is less
than (70±20) Ω.
4. Maintenance
This is a precise meter; please don't try to modify the circuit.
Note:
1. Do not input oltage o er DC600V or AC 600Vrms.
2. Do not measure oltage on range Ω.
3. Do not use this meter for measurement if the battery is not correctly placed or the back case is not properly screwed.
4. Remo e the test leads from the testing points and turn off the meter before replacing battery or fuse.
Battery Replacement
Note: Pay attention to the battery status.
Please replace the battery when LCD displays “ ” .
Steps:
1. Unscrew the battery co er.
2. Take out the 9V battery and replace it with a new one.
3. Install and screw the battery co er.
Fuse Replacement (This operation could only be processed in power off status.)
1. Unscrew the battery co er.
2. Take out the battery and open the back co er.
3. Please use fuse of the same specification.
The operation manual is subject to change without notice.
The content of this manual is regarded as correct. In case readers find any errors and missing parts, please contact the
manufacturer.
The Company shall not be held liable for any accidents and hazards resulted from the mal-operations by the user.
The function stated in this operation manual can not be taken as the reason for using the product for special purposes.
This product needs to connect high voltage for measurement, so please don't try to modify the circuit. Users who modify
the circuit by themselves should take the responsibility of any consequence caused.
01E-830L-000B