Adjustable Ac 220v Digital Display Voltmeter

What are the features of the adjustable AC 220V digital display voltmeter?
The adjustable AC 220V digital display voltmeter boasts several features:
Measuring Range: Covers AC 70V to 500V.
Power Supply: This doesn’t require an additional power supply, using the measured voltage directly.
Maximum Input: Can handle up to AC 500V, with a warning against input voltages higher than this to prevent damage.
Accuracy: Provides a ±1% allowable error.
Display: Utilizes a three-digit 0.56LWD digital display in red color for easy reading.
Installation: Simple two-wire design for easy wiring and installation.
Calibration: Features a potentiometer for fine-tuning calibration in case of voltage differences.
Dimensions: Compact size with dimensions of 482922mm and a hole size of 46*27mm.
Safety: Users are advised to be knowledgeable in electrical systems for proper usage.

How does the calibration process work for the voltmeter?
The calibration process for the adjustable AC 220V digital display voltmeter involves:
Locate the Potentiometer: Identify the potentiometer located on the backside of the voltmeter.
Adjustment: With the voltmeter connected to the power source, adjust the potentiometer using a screwdriver.
Fine-Tuning: Gradually turn the potentiometer until the displayed voltage matches the expected voltage or a calibrated reference.
Verification: Verify the accuracy of the voltmeter readings by comparing them with a known voltage source or a calibrated instrument.
Repetition (if necessary): If the voltage readings are still off, repeat the adjustment process until satisfactory accuracy is achieved.
Securing: Once calibrated, secure the potentiometer to prevent accidental adjustments.
It’s essential to follow safety precautions and ensure proper knowledge of electrical systems during the calibration process to avoid any risks of electric shock or damage to equipment.

Package contains
1 x Adjustable Ac 220v digital display voltmeter