1. Introduction
Thank you for choosing the Xetron SRC-400 HVAC Refrigerant Charging Scale. This high-precision digital scale is designed for accurate measurement of refrigerant weight during charging and recovery processes in HVAC and automotive air conditioning systems. With a robust design and user-friendly features, the SRC-400 ensures reliable performance for professional use. Please read this manual thoroughly before operation to ensure proper use and to maximize the lifespan of your device.
2. Safety Information
- Always operate the scale on a stable, level surface to ensure accurate readings.
- Do not exceed the maximum weight capacity of 100 kg (220 lbs). Overloading can damage the sensors.
- Keep the scale away from extreme temperatures, direct sunlight, and moisture.
- Avoid dropping or subjecting the scale to strong impacts.
- Ensure proper ventilation when working with refrigerants.
- Use appropriate personal protective equipment (PPE) when handling refrigerants.
- Do not attempt to disassemble or repair the scale yourself. Contact qualified service personnel.
3. Package Contents
Verify that all items are present and in good condition upon unpacking.
- Xetron SRC-400 Refrigerant Charging Scale Platform
- Remote Control Unit with LCD Display
- Nylon Carrying Bag
- User Manual (this document)
- Batteries (5 AAA, pre-installed or included separately)
4. Product Features
- High Capacity & Precision: Supports up to 100 kg (220 lbs) with an accuracy of ≤ ± 0.05% of reading. Resolution: 0.011 kg (0.025 lbs).
- Overload Detection: Displays "FULL" and emits an alarm when maximum capacity is exceeded to protect sensors.
- Multi-function Remote: Features auto-zero (tare) function, auto-test within 2 seconds of power-on, and auto-off after 10 minutes of inactivity.
- Unit Conversion: Easily switch between LB, OZ, and KG units.
- Large LCD Display: Extra-large LCD with backlight for clear reading from any angle. Displays battery life.
- Durable Construction: Made from aviation-grade aluminum with rubber armor corners and a textured rubber platform to prevent tank slippage.
- Convenient Design: Handheld controller with a practical hanging hook. Compact design allows the controller to be stored within the scale body.
5. Setup
5.1. Battery Installation
The scale is powered by 5 AAA batteries. Ensure batteries are correctly installed in both the scale platform and the remote control unit.
- Locate the battery compartment on the underside of the scale platform and on the back of the remote control unit.
- Open the compartments and insert the AAA batteries, observing the correct polarity (+/-).
- Close the battery compartments securely.
5.2. Initial Placement
Place the scale platform on a firm, level, and stable surface. Ensure there are no obstructions that could interfere with the weighing process.
Image: The remote control unit can be conveniently stored within the scale platform for transport and protection. The image also indicates the scale's dimensions and battery type.
6. Operating Instructions
6.1. Powering On and Self-Test
Press the POWER button on the remote control unit to turn on the scale. The scale will perform a self-test, which typically completes within 2 seconds.
Image: The scale initiates a self-test upon power-on and features an automatic shutdown if no weight change occurs for 10 minutes.
6.2. Unit Selection
Press the UNIT button to cycle through the available measurement units: Kilograms (KG), Pounds (LB), and Ounces (OZ). Select the desired unit before weighing.
Image: The scale supports three optional units: Kilograms (KG), Pounds (LB), and Ounces (OZ), selectable via the UNIT button.
6.3. Zero (Tare) Function
To measure the net weight of refrigerant, use the tare function.
- Place the empty refrigerant tank or container on the scale platform.
- Wait for the reading to stabilize.
- Press the ZERO button. The display will reset to 0.000.
- Begin charging or recovering refrigerant. The display will show the net weight of the refrigerant added or removed.
Image: The remote control unit highlights the functions of its buttons: POWER (turn on/off), ZERO (clear current reading), UNIT (switch units), and LAMP (turn on/off backlight).
6.4. Backlight Control
Press the LAMP button to turn the LCD backlight on or off. This is useful for reading in various lighting conditions. The backlight will automatically turn off after 10 seconds of inactivity to conserve battery, or it can be set to always on.
6.5. Overload Warning
If the weight on the platform exceeds the maximum capacity (100 kg / 220 lbs), the display will show "FULL" and an audible alarm will sound. Immediately remove some weight to prevent damage to the scale.
Image: The remote control unit indicates an overload by displaying "FULL" and emitting a beep, protecting the sensors from damage.
6.6. Remote Control Placement
The remote control unit features a swivel bracket and a hook, allowing it to be placed on the ground or hung for optimal viewing during operation.
Image: The remote control unit is equipped with a 360-degree swivel bracket, making it easy to read whether placed on the ground or hung.
7. Maintenance
7.1. Cleaning
Wipe the scale platform and remote control unit with a soft, damp cloth. Do not use abrasive cleaners or immerse the unit in water.
7.2. Storage
When not in use, store the scale in its nylon carrying bag in a dry, cool place. Remove batteries if the scale will not be used for an extended period to prevent leakage.
7.3. Battery Replacement
The LCD display indicates battery life. Replace batteries when the low battery indicator appears to ensure accurate operation.
8. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Scale does not turn on. | Dead or incorrectly installed batteries. | Check battery polarity and replace batteries if necessary. |
| Inaccurate readings. | Unstable surface; scale not zeroed; exceeding capacity; external interference. | Place on a stable surface. Press ZERO before weighing. Ensure weight is within capacity. Avoid strong vibrations or drafts. |
| "FULL" displayed and alarm sounds. | Overload condition. | Immediately remove weight from the platform until the display clears. |
| Display is dim or blank. | Low battery; backlight off. | Replace batteries. Press LAMP button to turn on backlight. |
| Scale turns off automatically too quickly. | Auto-off feature activated. | The scale is designed to auto-off after 10 minutes of no weight change. This is normal operation. |
9. Specifications
| Feature | Detail |
|---|---|
| Model Number | SRC-400 (XT-SRC-400-UK-new) |
| Brand | Xetron |
| Maximum Weight Capacity | 100 Kilograms (220 lbs) |
| Accuracy | ≤ ± 0.05% of reading |
| Resolution | 0.011 kg (0.025 lbs) |
| Units | KG, LB, OZ |
| Auto-Off | After 10 minutes of no weight change |
| Power Source | 5 x AAA Batteries (included) |
| Battery Life | Up to 40 hours (approximate) |
| Material | Aviation Aluminum, Rubber |
| Product Dimensions (L x W x H) | 20 x 20 x 4 cm (approx. 7.9 x 7.9 x 1.6 inches) |
| Product Weight | 4 Kilograms (approx. 8.8 lbs) |
Image: The Xetron SRC-400 scale features a high-performance chip for excellent resolution and accuracy, with specifications listed as 0.011 lbs resolution, 220 lbs capacity, and ±0.05% rdg + 0.022 lbs accuracy.
Image: A technician performing refrigerant charging using the Xetron SRC-400 scale, demonstrating its application in HVAC systems.
10. Warranty and Support
The Xetron SRC-400 Refrigerant Charging Scale comes with a one-year warranty from the date of purchase. Xetron also provides lifetime customer service for this product.
For technical support, warranty claims, or any inquiries, please contact Xetron customer service through the retailer where the product was purchased or visit the official Xetron website for contact information.