CRI250 Piezo Injector Tester

Advanced Diagnostics for Piezoelectric Injectors

The CRI250 is not just a driver; it is a Comprehensive Tester designed specifically for the deep diagnosis of Piezoelectric Injectors. While standard testers only check if an injector sprays, the CRI250 analyzes the health of the internal piezo crystal stack.

Core Functions:

1. Resistance Measurement: Measures the resistance of the piezo crystal to check for internal shorts or open circuits.

2. Capacitance Measurement: Measures the capacitance of the piezo stack, a critical indicator of the crystal's ability to hold a charge and function correctly.

3. Insulation Resistance: Tests the insulation integrity of the piezo injector to prevent electrical leakage.

4. Dynamic Lift (Valve Opening): Measures the dynamic lift of the piezo crystal, ensuring the valve opens to the correct stroke distance.

5. Injection Test: Drives the piezo injector to simulate actual working conditions with adjustable pulse width and frequency.

Intuitive Interface:
The device features a clear LCD screen and dual rotary knobs (VOL for Voltage/ON-OFF and SEL for Mode/Selection), allowing for precise adjustment of the driving voltage up to 178V.

Application Scenarios:

• Piezo Injector Refurbishment: Sorting used injectors by measuring their Capacitance and Resistance values to match them into balanced sets.

• Advanced Troubleshooting: Diagnosing intermittent misfires caused by piezo stack insulation breakdown (which standard testers miss).

• Precision Repair: Using the "Dynamic Lift" mode to adjust the internal shim gap of the piezo actuator.

FAQ (Frequently Asked Questions)

Q1: Can the CRI250 test standard Solenoid (Magnetic) injectors?
A: No, the CRI250 is a specialized tool designed exclusively for Piezoelectric Injectors. For Solenoid injectors, please consider our CRI120 or CR1000 models.

Q2: Why is measuring Capacitance important for Piezo injectors?
A: The piezo stack acts like a capacitor. If the capacitance value is out of range, the injector will not react fast enough or open fully, leading to poor engine performance. The CRI250 accurately measures this.

Q3: What is the maximum frequency?
A: The CRI250 can drive piezo injectors up to 100Hz, which is significantly higher than most standard testers (usually 30Hz), allowing for high-speed stress testing.

Q4: How do I select the functions?
A: Press the "SEL" (MODE) knob to enter the submenu and rotate it to choose between Resistance, Capacitance, Insulation, Valve Opening, or Inject Test.

• Piezo Specialist: Specifically engineered for Piezo technology (Bosch, Siemens, Denso, Delphi Piezo), providing more accurate data than generic testers.

• Deep Health Check: Unique ability to measure Capacitance and Insulation, helping technicians identify "weak" piezo stacks that fail under heat or load, even if they pass a basic spray test.

• High Voltage & Frequency:

• Adjustable Drive Voltage: 0 ~ 178V (Essential for activating stiff piezo crystals).

• High Frequency: 1 ~ 100Hz (Much faster than the standard 30Hz, simulating high-speed engine RPM).

• Universal Power: Works on AC 100-240V, making it plug-and-play worldwide without voltage converters.

• Compact & Robust: A portable desktop unit that combines the functions of a multimeter, LCR meter, and injector driver into one.