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 value over the range when measuring.
2. When measuring voltage higher than 36V DCV, 25V ACV, check the connection and insulation of the test leads to avoid
electric shock.
3. Keep the test leads away from the testing point when converting function and range.
4. Don’t add voltage 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. Over Range Indication: MSD displays "1"
1-5. Low Battery Indication: " " symbol displays.
1-6. Operation Environment: (0
～
40) , relative humidity ℃
＜
80% .
1-7. Power: 9V battery (NEDA1604/6F22 or equivalent)
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) , relative 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)

Summary

General Information

Safety Precautions

Technical Specifications

General Features

Summary of device's main specifications and capabilities, including display and battery.

Technical Feature Details

Details accuracy, operating conditions, and warranty information for measurements.

DC Voltage Specifications

Specifications for Direct Current Voltage (DCV) measurement ranges and accuracy.

AC Voltage Specifications

Specifications for Alternating Current Voltage (ACV) measurement ranges and accuracy.

DC Current Specifications

Specifications for Direct Current Amperage (DCA) measurement ranges and accuracy.

Resistance Specifications

Specifications for Resistance measurement ranges and accuracy.

Diode and Continuity Test Specs

Details for testing diodes and continuity, including display and conditions.

DC Voltage Measurement Procedure

AC Voltage Measurement Procedure

DC Current Measurement Procedure

Resistance Measurement Procedure

Diode Test Procedure

Continuity Test Procedure

Maintenance and Battery Replacement

Overview

1. Function Description
2. Usage Features
3. Maintenance Features

This document outlines the operation and maintenance of a pocket-sized digital multimeter, a versatile tool designed for various electrical measurements in laboratory, household, and enthusiast settings.

Function Description

The multimeter is primarily used to measure direct current voltage (DCV), alternating current voltage (ACV), and direct current amperage (DCA). Beyond these core functions, it also offers capabilities for resistance measurement, diode testing, and continuity checks. Its compact design makes it convenient for portable use.

Usage Features

To ensure safe and accurate operation, several key usage features and precautions are highlighted. When measuring, it is crucial to avoid inputting values that exceed the specified range of the device. For voltage measurements, particularly those above 36V DCV or 25V ACV, users must verify the connection and insulation of the test leads to prevent electric shock. It is also advised to keep the test leads clear of the testing point when switching between functions or ranges. A critical safety note for resistance measurement is to never apply voltage to the input terminal.

The device features a clear 22mm digit height LCD display, capable of showing up to 1999 counts, with automatic polarity indication. It has a sampling rate of approximately 3 times per second, ensuring timely readings. An "1" displayed on the MSD indicates an over-range condition, while a specific symbol signals a low battery, prompting replacement. The multimeter operates optimally within a temperature range of 0 to 40 degrees Celsius and a relative humidity of less than 80%. It is powered by a 9V battery.

For DC voltage measurement, the black test lead connects to the "COM" terminal and the red test lead to the "V/Ω" terminal. Users should set the knob to an appropriate DCV range and connect the test leads across the circuit. The LCD will then display the voltage and its polarity. A general guideline is to start with the highest range if the voltage is unknown, then adjust downwards as needed. If the display shows "1," it means the range is too low, and a higher range should be selected. It is imperative not to input voltage exceeding 600V to prevent damage.

AC voltage measurement follows a similar procedure: black lead to "COM," red lead to "V/Ω." The knob should be set to an appropriate ACV range, and the test leads connected across the circuit. As with DCV, starting with the highest range for unknown voltages is recommended, and voltages over 600Vrms should be avoided.

For DC current measurement, the black test lead connects to "COM." The red test lead can be connected to either the "V/Ω" terminal for currents up to 200mA or the "10A" terminal for currents up to 10A. The knob is set to the appropriate DCA range, and the test leads are connected in series with the circuit. The display will show the current value and its polarity. Again, starting with the highest range is advised, and exceeding the maximum input current (200mA or 10A, depending on the red lead's position) will likely blow the fuse.

Resistance measurement involves connecting the black test lead to "COM" and the red test lead to "V/Ω." The knob is set to the desired resistance range, and the leads are connected across the resistance under test. If the LCD displays "1," the resistance is over the selected range, requiring a higher range selection. For resistances above 1MΩ, the reading may take a few seconds to stabilize, which is normal. An open circuit input terminal will display an overload. When measuring in-line resistors, it is crucial to ensure the power is off and all capacitors are fully discharged. Applying voltage to the resistance range is strictly forbidden, despite the meter having some voltage protection in this range.

Diode testing involves connecting the black test lead to "COM" and the red lead to "V/Ω" (red being positive). The knob is set to the diode symbol, and the test leads are connected to the diode. The red lead connects to the positive polarity of the diode, and the display shows the approximate forward voltage drop.

Continuity testing is performed by setting the knob to the continuity symbol. Applying the test leads to two points in a circuit will cause an internal buzzer to sound if the resistance between those points is less than (70±20)Ω.

Maintenance Features

The multimeter is a precise instrument and should not be modified. Several maintenance notes are provided to ensure its longevity and accurate performance. It is crucial not to input voltage exceeding DC600V or AC 600Vrms. Voltage measurements should never be attempted on the resistance range. The meter should not be used if the battery is incorrectly placed or if the back case is not properly screwed. Before replacing the battery or fuse, always remove the test leads from the testing points and turn off the meter.

Battery replacement is indicated by a specific symbol on the LCD. To replace the battery, unscrew the battery cover, remove the old 9V battery, insert a new one, and then reinstall and screw the cover back on.

Fuse replacement should only be performed when the device is powered off. The process involves unscrewing the battery cover, removing the battery, opening the back cover, and replacing the fuse with one of the same specification.

The manual also states that its content is considered correct, but users who find errors or missing parts should contact the manufacturer. The company disclaims liability for accidents or hazards resulting from user mal-operations. The functions described are not intended for special purposes. Users are warned against modifying the circuit, especially when dealing with high voltage measurements, and assume responsibility for any consequences of such modifications.

Victor VC830L Specifications