1. Introduction
The LYCEBELL Digital Manometer (Model: E2-QX1201) is a professional-grade dual-port air pressure meter engineered for high-precision measurement of gas pressure and temperature. This versatile device supports 12 different measurement units and includes a backlight display for clear readability in various conditions. Its robust design and advanced features make it an essential tool for gas measurement and calibration, HVAC system troubleshooting, laboratory testing, and maintenance of gas appliances.

Figure 1.1: LYCEBELL Digital Manometer E2-QX1201

Figure 1.2: Key Features of the Digital Manometer
2. What's in the Box
Upon opening the package, please verify that all the following components are included and in good condition:
- 1 x Digital Manometer Unit
- 1 x Tool Bag
- 1 x Flexible Tube
- 1 x Hose Connector
- 1 x Set of Batteries
- 1 x User Manual

Figure 2.1: Package Contents
Video 2.1: Unboxing and Package Contents (0:09 - 0:23)
3. Setup
3.1 Battery Installation
To power on your manometer, you will need to install the included 9V battery. Follow these steps:
- Locate the battery compartment cover on the back of the device.
- Gently slide the cover downwards to open the compartment.
- Insert the 9V battery, ensuring the correct polarity (+ and -) as indicated inside the compartment.
- Close the battery compartment cover by sliding it back into place until it clicks securely.

Figure 3.1: Rear View of Manometer with Battery Compartment
Video 3.1: Battery Installation (0:24 - 0:36)
4. Operating Instructions
4.1 Button Functions
Familiarize yourself with the control buttons on the front panel of the manometer:

Figure 4.1: Manometer Display and Buttons
- Power On/Off Button (⏻): Press to turn the device on or off.
- UNITS Button: Press to switch between the 12 available pressure units (Pa, KPa, psi, kgcm², ozin², bar, mbar, mmHg, inHg, inH₂O, ftH₂O, cmH₂O). Press and hold for over 2 seconds to clear stored data.
- HOLD Button: In power-on status, press to hold the current reading on the display. Press and hold for over 2 seconds to make the reading zero (tare function).
- DIF Button: Press to look up stored data.
- MAX Button: Press to look down stored data. Press and hold to enter Max/Min measuring mode.
- °C/°F Button: Press to store up to 100 data points.
Video 4.1: Button Descriptions and Functions (0:37 - 1:16)
4.2 Connecting Tubes
The manometer features two tube connectors for differential pressure measurement:
- Tube Connector (+): For positive pressure input.
- Tube Connector (-): For negative pressure input.
Connect the flexible tubes to these ports as required for your measurement application. Ensure a secure fit to prevent leaks and ensure accurate readings.

Figure 4.2: Dual-Port Connectors
Video 4.2: Tube Connection (1:16 - 1:20)
5. Applications
The LYCEBELL Digital Manometer is suitable for a wide range of applications requiring precise pressure measurement and analysis. Its high accuracy and multiple units make it adaptable to various industrial and scientific needs.
- Gas Measurement and Calibration: Essential for verifying and calibrating gas systems.
- HVAC Systems: Ideal for troubleshooting and maintaining heating, ventilation, and air conditioning systems.
- Gas Appliance Repair and Installation: Used to ensure proper pressure settings and detect leaks in gas appliances.
- Laboratory Testing: Provides accurate pressure readings for experimental setups.
- Blower and Clean Room Monitoring: Measures airflow and pressure differentials in controlled environments.
- Boiler Maintenance: Assists in checking and adjusting boiler pressure for optimal performance and safety.

Figure 5.1: Diverse Applications of the Manometer
Video 5.1: Wide Application Examples (1:20 - 1:40)
6. Maintenance
To ensure the longevity and accuracy of your LYCEBELL Digital Manometer, follow these maintenance guidelines:
- Cleaning: Wipe the device with a soft, dry cloth. Do not use abrasive cleaners or solvents.
- Storage: Store the manometer in its protective tool bag in a cool, dry place away from direct sunlight and extreme temperatures.
- Battery Care: Remove the battery if the device will not be used for an extended period to prevent battery leakage and damage.
- Tube Inspection: Regularly inspect the flexible tubes for cracks, kinks, or blockages that could affect readings. Replace if necessary.
7. Troubleshooting
If you encounter issues with your manometer, refer to the following common problems and solutions:
- Device Does Not Turn On:
- Check if the battery is installed correctly with the right polarity.
- Replace the battery with a new 9V battery.
- Inaccurate Readings:
- Ensure the tubes are securely connected and free from leaks or blockages.
- Perform a zero adjustment using the HOLD button (press and hold for 2 seconds).
- Verify that the correct measurement unit is selected.
- Display is Dim or Flickering:
- The battery may be low. Replace the battery.
- Cannot Store Data:
- Ensure the device is in the correct mode for data storage (refer to °C/°F button function).
- The memory might be full. Clear stored data by pressing and holding the UNITS button for 2 seconds.
8. Specifications
Detailed technical specifications for the LYCEBELL Digital Manometer:
| Feature | Value |
|---|---|
| Product Dimensions | 5.31 x 2.17 x 1.1 inches |
| Item Weight | 4.52 ounces |
| Model Number | E2-QX1201 |
| Manufacturer | LYCEBELL |
| Country of Origin | China |
| Power Source | 9V Battery (included) |
| Display | LCD with Backlight |
| Measurement Units | 12 (Pa, KPa, psi, kgcm², ozin², bar, mbar, mmHg, inHg, inH₂O, ftH₂O, cmH₂O) |
| Data Storage | Up to 100 data points |

Figure 8.1: Measurement Units, Range, and Resolution
9. Warranty and Support
LYCEBELL products are manufactured to high-quality standards. For warranty information or technical support, please refer to the contact details provided in the original product packaging or visit the official LYCEBELL website. Keep your purchase receipt as proof of purchase for warranty claims.





