Victor 98A+ Smart Digital Multimeter User Manual

1. Introduction

The Victor 98A+ is a handheld, battery-operated smart digital multimeter designed for measuring various electrical parameters. It combines the functionality of a digital multimeter with advanced features, making it suitable for both professional and DIY electrical work. This instrument measures AC/DC voltage, AC/DC current, resistance, capacitance, dBm, TC (thermocouple), RTD (resistance temperature detector), Diode Test, Continuity Check, and frequency/duty cycle ratio. It boasts a 4 1/2 digit resolution and True RMS response for accurate readings.

2. Safety Information

Always observe basic safety precautions when using this multimeter to avoid electric shock or personal injury. Read and understand all instructions before use.

• Do not exceed the maximum input values for any function.
• Do not use the meter if it or the test leads appear damaged.
• Ensure the function switch is in the correct position before making measurements.
• Use caution when working with voltages above 30V AC RMS, 42V peak, or 60V DC. These voltages pose a shock hazard.
• Always disconnect the test leads from the circuit before changing functions.
• Replace the battery and fuses only with the specified type and rating.
• Do not operate the meter with the case open.

3. Product Features

• Selectable manual range or auto-range functions.
• Display hold (DIS_HOLD) and auto hold (AUTO_HOLD) functions.
• Peak measurement function with 1ms peak value capture.
• Adjustable 1-2400Ω reference impedance for decibels measurement.
• AC + DC measurement capability.
• Relative value measurement (REL_%).
• Maximum, minimum, and average value measurement (MAX/MIN/AVG).
• Display speed rate: 2.5-3 times/second; analog refreshing rate: 20-24 times/second.
• True RMS response for AC voltage and current measurements, with a bandwidth of 20Hz-1kHz.
• TC measurement (K division) with built-in temperature transmitter and automatic reference-junction compensation (display in ℃ or ℉).
• Continuity measurement with audible alert for values below 30Ω.
• Large LCD screen with white backlight for simultaneous display of multiple data.
• Two types of memory data functions: saved readings and logged readings (up to 2000 independent measuring data points).
• Automatic backlight shut-off and automatic power-down features.
• Panel calibration technology, eliminating the need to open the case for calibration.
• Compatible with alkaline and Ni-Hi batteries; convenient battery and fuse replacement via battery door.
• Standard USB jack for 2.4G wireless communication module to connect with a PC (wired communication also available).
• User-friendly man-machine interface for data acquisition, storage, processing, and management (graphical and tabular display).

4. Package Contents

Verify that all items are present in your package:

• Smart Digital Multimeter (Victor 98A+)
• Packing Box
• Product Manual
• Software CD
• Test Leads (Red and Black)
• Data Line (USB cable)

5. Product Layout and Panel Introduction

1. Communication Interface
2. Display screen
3. MAX, MIN, and AVG value buttons
4. Data retention (HOLD) button
5. Frequency/Duty Cycle (Hz %) button
6. Backlit buttons (LIGHT)
7. Power switch key
8. Function range knob
9. Input terminal
10. Peak measurement (PEAK) button
11. Manual / automatic key (RANGE)
12. Relative value measurement (REL) button
13. Store/read button (SAVE)
14. Function switch key (rotary dial)

6. Setup

6.1 Battery Installation

The Victor 98A+ multimeter requires 4 AAA alkaline batteries. To install or replace batteries:

1. Ensure the multimeter is powered off and test leads are disconnected.
2. Locate the battery compartment on the back of the device.
3. Open the battery door.
4. Insert 4 AAA batteries, observing correct polarity.
5. Close the battery door securely.

6.2 Connecting to a Computer

The multimeter can be connected to a PC for data logging and analysis using the provided USB cable and software.

1. Locate the communication interface on the side of the multimeter (under a protective cover).
2. Connect the provided USB data line to the multimeter and your computer.
3. Install the necessary drivers (CP210x Windows Drivers) and the DMMVIEW software from the included CD or manufacturer's website.
4. Follow the on-screen instructions to complete the software installation.
5. Once installed, launch the DMMVIEW software. You can then select the appropriate COM port in the software settings to establish communication and begin watching and recording data.

7. Operating Instructions

This section provides general guidance for common measurements. Always refer to the detailed instructions in the software manual for specific advanced functions.

7.1 AC Voltage Measurement

1. Rotate the function knob to the 'V~' position.
2. Insert the red test lead into the 'VΩHz' jack and the black test lead into the 'COM' jack.
3. Connect the test leads in parallel to the circuit or component you wish to measure.
4. Read the AC voltage value on the display.

7.2 DC Voltage Measurement

1. Rotate the function knob to the 'V=' position.
2. Insert the red test lead into the 'VΩHz' jack and the black test lead into the 'COM' jack.
3. Connect the test leads in parallel to the circuit or component, observing polarity.
4. Read the DC voltage value on the display.

7.3 AC Current Measurement

1. Rotate the function knob to the 'A~' or 'mA~' or 'μA~' position, depending on the expected current range.
2. Insert the red test lead into the '10A MAX' or 'mAuA' jack and the black test lead into the 'COM' jack.
3. Connect the test leads in series with the circuit.
4. Read the AC current value on the display.

7.4 DC Current Measurement

1. Rotate the function knob to the 'A=' or 'mA=' or 'μA=' position, depending on the expected current range.
2. Insert the red test lead into the '10A MAX' or 'mAuA' jack and the black test lead into the 'COM' jack.
3. Connect the test leads in series with the circuit, observing polarity.
4. Read the DC current value on the display.

7.5 Resistance Measurement

1. Rotate the function knob to the 'Ω' position.
2. Insert the red test lead into the 'VΩHz' jack and the black test lead into the 'COM' jack.
3. Connect the test leads across the component to measure resistance. Ensure the circuit is de-energized.
4. Read the resistance value on the display.

7.6 Capacitance Measurement

1. Rotate the function knob to the 'nF' position.
2. Insert the red test lead into the 'VΩHz' jack and the black test lead into the 'COM' jack.
3. Connect the test leads across the capacitor. Ensure the capacitor is discharged before measurement.
4. Read the capacitance value on the display.

7.7 Diode Test

1. Rotate the function knob to the diode symbol position.
2. Insert the red test lead into the 'VΩHz' jack and the black test lead into the 'COM' jack.
3. Connect the red lead to the anode and the black lead to the cathode of the diode.
4. Read the forward voltage drop on the display. Reverse the leads to check for open circuit (OL).

7.8 Continuity Check

1. Rotate the function knob to the continuity symbol position.
2. Insert the red test lead into the 'VΩHz' jack and the black test lead into the 'COM' jack.
3. Connect the test leads across the circuit or component.
4. An audible beep indicates continuity (resistance below 30Ω).

7.9 Frequency Measurement

1. Rotate the function knob to the 'Hz' position.
2. Insert the red test lead into the 'VΩHz' jack and the black test lead into the 'COM' jack.
3. Connect the test leads to the signal source.
4. Read the frequency value on the display.

7.10 Temperature Measurement (TC Test)

1. Rotate the function knob to the 'TC' position.
2. Connect a K-type thermocouple to the appropriate input terminals.
3. Read the temperature value on the display in ℃ or ℉.

7.11 Data Hold (HOLD)

Press the 'HOLD' button to freeze the current reading on the display. Press again to release.

7.12 MAX/MIN/AVG

Press the 'MAX/MIN' button to cycle through maximum, minimum, and average readings captured during a measurement session.

8. Specifications

Physical Specifications

• Display: Digital: 22000 counts primary display; 2200 counts secondary display; updates 24/second. Analog: 51 segments, updates 24/second.
• Operating Temperature: 0 - 40 ℃
• Storage Temperature: -10 - 55 ℃
• Operating Humidity: 0 ℃ - 30 ℃ ≤75%, 30 ℃ - 40 ℃ ≤50%
• Altitude: 0-2000m (according to IEC61010 CAT. III, 1000V; CAT. IV, 600V)
• Battery Type: 4 × AAA alkaline battery, NEDA, LR03
• Power: MAX 60mVA / 625mVA (turn backlight on)
• Temperature coefficient: 0.15 × (specified accuracy)/℃ (0 ℃ - 18 ℃ or >28 ℃)
• EMC: Complies with IEC61326-1, Group 1, Class B
• Dimensions: 205 × 95 × 42mm (plus protector)
• Weight: About 500g (plus protector)
• Calibration Interval: 1 Year

9. Maintenance

• Cleaning: Wipe the meter with a damp cloth and mild detergent. Do not use abrasives or solvents.
• Battery Replacement: Replace batteries when the low battery indicator appears on the display. Refer to Section 6.1 for instructions.
• Fuse Replacement: If the current measurement function fails, the fuse may need replacement. Ensure the meter is off and leads are disconnected before opening the case to replace fuses. Use only specified fuse types and ratings.
• Storage: If the meter is not to be used for a long period, remove the batteries to prevent leakage. Store in a cool, dry place.

10. Troubleshooting

• No Display: Check battery installation and charge level. Replace batteries if necessary.
• Incorrect Readings: Ensure test leads are properly connected and not damaged. Verify the function knob is set to the correct measurement type and range. Check for proper circuit connection.
• "OL" (Overload) Display: The measured value exceeds the selected range. Switch to a higher range or verify the circuit is within the meter's capabilities.
• No PC Connection: Ensure USB cable is securely connected to both the multimeter and the computer. Verify that the USB drivers and DMMVIEW software are correctly installed and the correct COM port is selected in the software.

11. User Tips

• Start with Auto-Range: For unknown values, begin with the auto-range function to prevent overloading the meter.
• Check Test Leads: Before any measurement, perform a continuity check on your test leads to ensure they are not broken.
• De-energize Circuits: Always de-energize circuits and discharge capacitors before measuring resistance or capacitance to prevent damage to the meter or inaccurate readings.
• Proper Jack Usage: Pay close attention to the input jacks for current measurements (10A MAX or mAuA) versus voltage/resistance measurements (VΩHz) to avoid blowing fuses or damaging the meter.
• Data Logging: Utilize the PC connectivity and DMMVIEW software for long-term monitoring or recording of fluctuating measurements.

12. Warranty and Support

RuoShui (Victor) instruments are guaranteed to be 100% genuine and original.

• Product Warranty: A 1-year warranty is provided for all products, excluding items damaged or misused after receipt.
• Accessories Warranty: Accessories come with a 3-month warranty.
• Defective Items: Defective items must be reported and returned within the warranty period, preferably in their original packaging.

For any issues or support, please contact the seller directly. Providing clear details of the problem will help in a quicker resolution.