Victor 690B Digital Flexible Current Clamp Multimeter User Manual

1. Introduction

The Victor 690 series flexible current clamp meter is designed for field testing of AC high current and leakage current. It features high precision, good linearity, and strong anti-interference capabilities, making it a reliable alternative to conventional clamp meters for measuring high current leakage. This instrument is widely used in various fields including electric power, communications, meteorology, railways, oil fields, construction, measurement, scientific research, and industrial and mining enterprises. It is particularly well-suited for current testing in industrial environments where signals may be severely distorted, such as dense wiring, transformer core current tests, thick cable tests, and applications involving relay protection, silicon-controlled rectifiers, variable frequency speed regulation, semiconductor switches, power electronic conversion equipment, and arc welding.

Figure 1: Victor 690B Flexible Current Clamp Multimeter Overview

2. Product Features

• Flexible CT Measurement: Utilizes a flexible CT measurement method for accurate readings.
• Wide Current Range: Measures AC current from 0mA to 10000A.
• Voltage Measurement: Measures AC voltage up to 750V and DC voltage up to 1000V (Model 690B only).
• True RMS: Provides accurate measurements for non-sinusoidal waveforms.
• Digital Display: Clear and large color LCD screen for easy reading.
• Data Retention: Hold function to freeze the displayed reading.
• Data Storage: Ability to store up to 500 sets of measurement data.
• Alarm Indication: Features an alarm function with settable thresholds.
• Automatic Shut-down: Power-saving feature to extend battery life.
• Low Pressure Tips: Indicates low battery status.
• Overflow Prompt: 'OL' display for readings exceeding the measurement range.

Figure 2: Key Features of the Victor 690B

3. Setup

3.1 Unpacking and Package Contents

Carefully unpack the device and check for any damage. Verify that all items listed below are present:

• Victor 690B Flexible Current Clamp Multimeter
• Color Box
• Instruction Manual
• Cloth Bag
• Test Pens (for voltage measurement)

Figure 3: Included Accessories

3.2 Battery Installation

The device requires 3 AAA batteries (not included). To install the batteries:

1. Locate the battery cover plate on the back of the device.
2. Use a screwdriver to open the battery compartment.
3. Insert 3 AAA batteries, ensuring correct polarity (+/-).
4. Replace the battery cover and secure it with the screw.

Figure 4: Back view showing battery cover plate

3.3 Component Identification

Familiarize yourself with the main components of the Victor 690B:

Figure 5: Front view with labeled components

1. Roche sensing coil
2. Turn on the coil knob
3. LCD display screen
4. Power button
5. Mode key
6. SET button
7. Data retention (HOLD button)
8. Voltage input socket (690B only)
9. Battery cover plate (on back)

4. Operating Instructions

This section details the basic operation of the Victor 690B Flexible Current Clamp Multimeter.

4.1 Power On/Off

• Power On: Short press the red power button to turn the device on.
• Power Off: Short press the red power button again to turn the device off. The device also features automatic shut-down after a period of inactivity to conserve battery.

4.2 Mode Selection

• Short press the 'MODE' button to switch between measurement modes (e.g., AC current, AC voltage, DC voltage).

4.3 Data Hold

• Short press the 'HOLD' button to retain the current data displayed on the screen. Press again to release.

4.4 Alarm Setting

• Short press the 'SET' button to switch the alarm indication function on or off.
• Long press the 'SET' button to enter the alarm value setting mode. Use the 'MODE' and 'HOLD' buttons to adjust the value, and 'SET' to confirm.

4.5 Opening the Flexible Coil

• To open the flexible coil, turn the coil knob located near the base of the coil. This allows you to easily clamp around conductors.

4.6 AC Current Test

1. Ensure the device is in AC current measurement mode.
2. Open the flexible coil by turning the knob.
3. Clamp the coil around the wire or conductor to be measured. Ensure the coil is fully closed.
4. Read the AC current value displayed on the screen.
5. Note: If higher accuracy is required for small currents, winding the coil twice around the wire will result in a displayed value that is double the actual current. Divide the displayed value by 2 to get the actual current.

Figure 6: AC Current Test

4.7 AC Voltage Test (Model 690B only)

1. Ensure the device is in AC voltage measurement mode.
2. Plug the supplied test pens into the voltage input sockets on the device (red to V+, black to COM).
3. Carefully touch the test probes to the points where AC voltage needs to be measured.
4. Read the AC voltage value displayed on the screen.

Figure 7: AC Voltage Test

4.8 DC Voltage Test (Model 690B only)

1. Ensure the device is in DC voltage measurement mode.
2. Plug the supplied test pens into the voltage input sockets on the device (red to V+, black to COM).
3. Carefully touch the test probes to the points where DC voltage needs to be measured (e.g., battery terminals).
4. Read the DC voltage value displayed on the screen.

5. Maintenance

5.1 Cleaning

• Wipe the device with a soft, dry cloth. Do not use abrasive cleaners or solvents.
• Ensure the device is powered off and disconnected from any circuits before cleaning.

5.2 Battery Replacement

• When the low pressure tip (battery symbol) appears on the display, replace the batteries promptly to ensure accurate readings.
• Refer to section 3.2 for battery installation instructions.
• Remove batteries if the device will not be used for an extended period to prevent leakage.

5.3 Storage

• Store the device in a cool, dry place, away from direct sunlight and extreme temperatures.
• Recommended storage conditions: -10℃ to 60℃, relative humidity <70%RH.
• Use the provided cloth bag for protection during storage and transport.

6. Troubleshooting

If you encounter issues with your Victor 690B, consider the following:

• No Display/Faint Display: Check battery level. Replace batteries if low. Ensure the device is powered on.
• 'OL' Display: The measured value exceeds the device's range. Do not attempt to measure currents or voltages beyond the specified limits.
• Inaccurate Readings: Ensure the flexible coil is properly closed around the conductor for current measurements. For voltage, ensure test leads are securely connected and making good contact. Check for external interference in the measurement environment.
• No Response from Buttons: Try turning the device off and on again. If the issue persists, replace the batteries.

For persistent issues not covered here, please contact customer support.

7. Specifications

Figure 8: Product Technical Features

8. User Tips

• Frequency Range: While not explicitly stated, as an AC current and voltage meter, the device is designed to operate within standard power line frequencies (e.g., 50/60 Hz). For specific high-frequency applications, consult the manufacturer.
• Accuracy for Small Currents: For very small AC currents, wrapping the flexible coil multiple times around the conductor can amplify the signal, improving measurement resolution. Remember to divide the displayed reading by the number of wraps to get the actual current.
• Safety First: Always ensure the device is in the correct measurement mode before connecting to a circuit. Exercise caution when working with live electrical circuits.

9. Warranty and Support

This product is covered by a standard manufacturer's warranty against defects in materials and workmanship. Please refer to the warranty card included in your package for specific terms and conditions. For technical support, service, or warranty claims, please contact the seller or manufacturer directly.