RuoShui 923E Intelligent Digital Multimeter User Manual

1. Introduction

This manual provides essential information for the safe and effective operation of the RuoShui 923E Intelligent Digital Multimeter. This handheld device is a 3 5/6 digit, full-function, high-performance digital multimeter designed for measuring DCV, ACV, DCA, ACA, resistance, capacitance, frequency, temperature, diode, and continuity. It is a portable and ideal tool for various electrical testing applications.

Please read all safety and warning information in this manual carefully before use and strictly adhere to the instructions.

2. Safety Information

Your safety is paramount when using electrical testing equipment. This multimeter is designed with safety features, but proper usage is crucial to prevent electric shock or damage to the device.

• Always ensure the multimeter is in the correct measurement mode before connecting test leads to a circuit.
• Do not exceed the maximum input values specified for each range.
• The device is rated CAT III 600V. Adhere to these voltage limits.
• Equipped with a 10A/250V anti-scald fuse and overload protection for enhanced safety.
• Inspect test leads for damage before each use. Replace if insulation is compromised.
• Do not operate the multimeter if it appears damaged or if the casing is open.
• Avoid using the device in wet environments or during electrical storms.
• Always disconnect power to the circuit before making resistance, capacitance, or diode measurements.
• When measuring current, ensure the multimeter is connected in series with the load.

This product complies with CE and RoHS certifications, ensuring its reliability and safety standards.

3. Key Features

The RuoShui 923E Digital Multimeter offers a range of functions and design elements for efficient and accurate measurements:

• Display: Large LCD display with 5999 counts (3 5/6 digits) and automatic polarity indication.
• Measurement Capabilities: DC/AC Voltage, DC/AC Current, Resistance, Capacitance, Frequency, Temperature, Diode, Continuity.
• Smart Mode: Automatically identifies and measures DC/AC voltage, resistance, and continuity without manual range selection.
• True RMS (TRMS): Provides accurate measurements for non-sinusoidal AC waveforms.
• Non-Contact Voltage (NCV) Detection: Detects AC voltage without direct contact, enhancing safety.
• Live Wire Detection: Identifies live electrical wires.
• Data Hold: Freezes the displayed measurement for easy recording.
• Built-in Flashlight: Assists in working in dimly lit or hard-to-reach areas.
• Auto Power Off: Automatically shuts down after 15 minutes of inactivity to conserve battery life.
• Low Battery Indication: Alerts when batteries need replacement.
• Analog Bar Display: Provides a visual representation of measurement trends.
• Overload Protection: Protects the device from damage due to excessive input.

Figure 3.1: Overview of RuoShui 923E Multimeter features, including AC/DC voltage, current, resistance, temperature, diode, capacitance, continuity, frequency, TRMS, data hold, NCV, live wire detection, fuse reminder, flashlight, auto power off, and pen socket.

Figure 3.2: The multimeter's large HD reverse display screen, showing the main display area, environmental temperature, simulation bar, and functional gear indicators. It highlights the intelligent mode for automatic measurement identification.

4. Package Contents

Upon opening the package, please verify that all items listed below are present and in good condition:

• 1 x RuoShui 923E Digital Multimeter
• 2 x Test Leads (Red and Black)
• 1 x K-Type Temperature Probe
• 1 x User Manual
• 1 x Storage Case
• Note: 4 x AAA LR03 1.5V batteries are not included and must be purchased separately.

Figure 4.1: Visual representation of the package contents, including the multimeter, test leads, temperature probe, user manual, and storage bag.

5. Setup and Initial Use

5.1 Battery Installation

1. Locate the battery compartment cover on the back of the multimeter.
2. Use a screwdriver to open the battery compartment.
3. Insert 4 x AAA LR03 1.5V batteries, ensuring correct polarity (+/-).
4. Replace the battery compartment cover and secure it with the screw.

5.2 Connecting Test Leads

1. Insert the black test lead into the "COM" (common) input jack.
2. For most voltage, resistance, continuity, capacitance, frequency, and diode measurements, insert the red test lead into the "INPUT" jack.
3. For current measurements (mA/A), insert the red test lead into the "mA/A" jack. Ensure the correct jack is used to prevent damage to the multimeter or the circuit being tested.

Figure 5.1: The RuoShui 923E Digital Multimeter with its test leads and temperature probe, illustrating the input jacks for various measurements.

6. Operating Instructions

6.1 Power On/Off

Press the Power button to turn the multimeter on or off.

6.2 Smart Mode (Automatic Measurement)

When powered on, the multimeter defaults to Smart Mode. In this mode, the device automatically detects and measures:

• DC/AC Voltage
• Resistance
• Continuity

Simply connect the test leads to the circuit, and the multimeter will display the appropriate measurement without manual range selection.

6.3 Manual Mode (Function Selection)

To access specific measurement functions not covered by Smart Mode, or to manually select a range:

1. Press the FUNC button to cycle through available functions within a category (e.g., ACV/DCV, Diode/Capacitance).
2. Use the SEL button to switch between different measurement types (e.g., Voltage, Current, Resistance).

Available manual functions include:

• DC/AC Current
• Diode Test
• Capacitance Measurement
• Frequency (Hz) / Duty Cycle (%)
• Temperature Measurement (using K-type probe)
• Non-Contact Voltage (NCV) Detection
• Live Wire Detection

6.4 Specific Measurement Functions

6.4.1 Non-Contact Voltage (NCV) Detection

To use NCV:

1. Select the NCV function using the SEL or FUNC button.
2. Bring the top of the multimeter near the conductor or outlet to be tested.
3. The device will emit an audible beep and illuminate an indicator light (red for high voltage, green for low voltage) if AC voltage is detected.

Figure 6.1: Illustration of the Non-Contact Voltage (NCV) detection feature, showing visual and audible alarms for high and low voltage signals.

6.4.2 Data Hold

Press the HOLD button to freeze the current reading on the display. Press it again to release the hold function and resume live measurements.

6.4.3 Flashlight Operation

Long press the HOLD button for more than 2 seconds to turn the built-in LED flashlight on or off. This is useful for illuminating dark work areas.

Figure 6.2: Demonstrates the one-key lighting feature, activated by a long press of the HOLD button, providing illumination for dark environments.

7. Maintenance

7.1 Cleaning

Wipe the multimeter casing with a damp cloth and mild detergent. Do not use abrasives or solvents. Ensure the device is off and disconnected from any circuits before cleaning.

7.2 Battery Replacement

When the low battery indicator appears on the display, replace the batteries promptly to ensure accurate measurements. Refer to section 5.1 for battery installation instructions.

7.3 Auto Power Off

The multimeter features an automatic shutdown function. If there is no operation for approximately 15 minutes, the device will power off to save battery life. Press any button to wake it up or the power button to turn it back on.

Figure 7.1: Illustrates the automatic power-off feature, which activates after 15 minutes of inactivity to conserve battery power.

7.4 Storage

When not in use for extended periods, remove the batteries to prevent leakage. Store the multimeter in its provided storage case in a cool, dry place, away from direct sunlight and extreme temperatures.

8. Troubleshooting

This section addresses common issues you might encounter with your RuoShui 923E Digital Multimeter.

If the problem persists after attempting these solutions, please contact customer support.

9. Specifications

10. Warranty and Customer Support

RuoShui provides 12 months of after-sales service and lifetime technical support for the Digital Multimeter. If you have any questions, encounter issues, or require assistance, please do not hesitate to contact RuoShui customer service.

Please refer to the contact information provided on the product packaging or the official RuoShui website for support details.