Equus 4320 (often branded under the name) is a professional-grade automotive digital multimeter designed to troubleshoot electrical problems in modern computerized vehicles. Unlike standard multimeters, it features high input impedance (10 MegOhm) to protect sensitive automotive sensors and ECU components from damage during testing. 📖 Key Specifications & Features Input Impedance : 10 MegOhm (Safe for engine computers). DC Voltage : Ranges up to 1000V DC. AC Voltage : Ranges up to 500V AC. DC Current : Up to 10 Amps. Specialty Modes Tachometer
: Measures RPM (0–10,000) for 3, 4, 5, 6, and 8-cylinder engines. : Measures dwell angle for ignition systems. Diode/Continuity : Audible test for wiring shorts and diode health. 🛠️ Step-by-Step Operating Guide 1. Basic Setup Connect Leads : Plug the test lead into the jack and the lead into the
: Turn the rotary dial from the "OFF" position to the desired measurement range. Safety First : Never measure resistance on a "live" (energized) circuit. 2. Measuring DC Voltage (Batteries & Sensors) Set the dial to the
Choose a range higher than the expected voltage (e.g., use the range for a 12V car battery).
Place the red lead on the positive (+) terminal and the black lead on the negative (-) ground.
: A healthy car battery should show ~12.6V when the engine is off. 3. Testing Continuity (Wiring Shorts) Turn the dial to the Continuity icon (looks like a sound wave). equus 4320 manual pdf
Touch the leads together to hear the beep (verifies the tool is working).
Place leads on opposite ends of a wire or fuse. A beep confirms the circuit is complete; no beep indicates a break. 4. Diode Testing Set the dial to the
Connect the red lead to one side and the black to the other.
Reverse the leads. A working diode should show a reading in one direction and "OL" (Open Loop) in the other. 🔋 Maintenance & Battery Replacement Low Battery Indicator
: If the battery icon appears on the LCD, replace the internal batteries immediately to ensure accuracy. Replacement Remove the two screws on the back of the case. Separate the case carefully. Replace with two AA-size alkaline batteries Equus 4320 (often branded under the name) is
: If the 10A current range stops working, check the internal fuse while the case is open. 📥 Where to Download the PDF
While Equus manuals are often hosted on secondary sites, the most reliable source for digital copies is the Innova Support Portal (Innova acquired the Equus line). Official Product Support iEquus Product Manuals Secondary PDF Archive Scribd - Equus 4320 Manual I can also explain how to use the
settings for older ignition systems if you're working on a classic car. Equus 4320 Multimeter Safety Guide | PDF - Scribd
The Equus 4320 Go to product viewer dialog for this item. is a handheld Digital Multimeter designed for testing home and automotive electrical systems. It is widely used by both professionals and DIY enthusiasts to measure voltage, resistance, and current. 📘 Official Manual & Resources The manual for the Equus 4320
provides essential safety instructions, specifications, and testing procedures. You can access the documentation through the following sources: Keep leads in COM and V/Ω/RPM
PDF Manual: A complete Equus 4320 Multimeter User Manual is available for viewing on Scribd.
Safety Guide: For detailed safety precautions, refer to the Equus 4320 Multimeter Safety Guide.
Manufacturer Support: As Equus products are part of the Innova brand, additional technical resources and manuals for similar tools can be found on the iEquus Product Manuals page. 🛠️ Key Features of the Equus 4320 Equus 4320 Multimeter Safety Guide | PDF - Scribd
Ensure the power is OFF to the circuit being tested to prevent damage.
| Problem | Likely Solution (Per Manual) | | :--- | :--- | | No Display | Check if battery is installed correctly or needs replacement. | | "OL" or "1" on screen | Input is out of range. Select a higher range on the rotary dial. | | Cannot measure Amps | The internal fuse is likely blown. Open the battery compartment to replace. | | False Readings | Ensure the battery is fresh and that the correct input jacks are being used for the specific test. |