Introduction
The Testo 558s Manifold Gauge is a state-of-art instrument designed for precise measurement and analysis of temperature and pressure in air conditioning, refrigeration, and heat pump systems. Featuring a 4-way valve block and an intuitive touchscreen, it provides a dynamic view of trending data, simplifying configuration, control, and documentation. This manual provides essential information for the safe and effective operation of your Testo 558s.
Package Contents
This image displays the complete Testo 558s AC Manifold Gauge Set, including the main manifold unit, two pipe-clamp thermometers, a vacuum probe, and a sturdy hard case for transport and storage.
Your Testo 558s AC Manifold Gauge Set package should contain the following items:
- 1 x Testo 558s Manifold Gauge
- 2 x Testo 115i Pipe-Clamp Thermometers
- 1 x Testo 552i Vacuum Probe
- 1 x Sturdy Hardcase
Key Features
- Versatile Measurement: Provides precise readings of temperature and pressure for AC systems, refrigeration, and heat pumps.
- High Precision: Features a superior pressure measuring accuracy of +/- 0.25% full scale.
- Refrigerant Compatibility: Fully compatible with A2L and A3 flammable refrigerants for safe operation.
- Interactive Operation: Enjoy an interactive app interface with touchscreen and graphical data trends over 30 minutes.
- Flexible Control: Switch between classic keypad operation or seamlessly integrate with the Testo Smart App.
- Dual Power System: Operates with both batteries and a rechargeable USB-C battery, offering up to 70 hours of battery life.
Component Overview
This image highlights key components of the Testo 558s manifold. These include the Mini USB Port for firmware updates, the Touch Display for instrument status, Hose Brackets for refrigerant hoses, a Sight Glass for refrigerant flow, Valve Positioners for easy positioning, Connections (3 x 7/16" UNF + 1 x 5/8'' UNF) for low/high pressure, and a Mini-DIN Socket for NTC temperature probes.
Advanced Capabilities
This diagram illustrates several advanced features: a vacuum sensor for precise data, a 4-way valve for efficient diagnostics, enhanced data collection, touchscreen and remote operation, IP54 housing for protection, and suitability for A1 and A2L refrigerants.
This image demonstrates the fully automated and networked capabilities of the Testo 558s system. It shows automatic calculation of target superheat and subcooling, logging of electrical parameters, temperature compensation, fully automatic charging with auto-stop function, and fully automatic evacuation with auto-stop functions and self-starting vacuum hold test.
Technical Specifications
| Specification | Value |
|---|---|
| Temperature Measuring Range | -58.0° to 302.0 °F / -50 to +150 °C |
| Temperature Accuracy | ±0.9 °F / ±0.5 °C |
| Pressure Measuring Range | -14.7 to 870 psi / -1 to 60 bar |
| Pressure Accuracy | ±0.25 % Fs |
| Probe Connection | 3 x 7/16" – UNF + 1 x 5/8'' – UNF |
| Pressure Overload Relay | 940 psi / 65 bar |
| Battery Life | ≤ 70 h with backlighting and Bluetooth® |
| Battery Type | Built-in rechargeable battery: LI battery 18650; 3x AA; Replaceable battery: 3 alkaline batteries AA |
| Product Dimensions | 9 x 4.4 x 2.8 inches |
| Item Weight | 3.2 Pounds |
| Material | Glass, Stainless Steel |
Setup
Before first use, ensure all components are present and undamaged. Charge the internal battery or insert fresh AA alkaline batteries.
- Power On: Press and hold the power button on the Testo 558s unit until the display illuminates.
- Battery Installation: If using AA batteries, open the battery compartment on the rear of the unit and insert 3 AA batteries, observing polarity. For the rechargeable battery, connect the USB-C cable to the port and a power source.
- Probe Connection: Connect the Testo 115i pipe-clamp thermometers and the Testo 552i vacuum probe to the appropriate ports on the manifold. Ensure connections are secure.
- App Connection (Optional): Download the Testo Smart App from your device's app store. Enable Bluetooth on your mobile device and open the app. Follow the in-app instructions to pair with your Testo 558s unit. This allows for remote operation and enhanced data visualization.
Operation
The Testo 558s offers flexible operation via its touchscreen, physical buttons, or the Testo Smart App.
- Selecting Measurement Mode: Use the touchscreen or navigation buttons to select the desired measurement menu (e.g., Superheat/Subcooling, Evacuation, Pressure Test).
- Connecting Hoses: Attach appropriate refrigerant hoses to the manifold's connections (3 x 7/16" UNF + 1 x 5/8'' UNF) and to the system being measured. Ensure all connections are tight to prevent leaks.
- Performing Measurements: Follow the on-screen prompts for the selected measurement mode. The display will show real-time data, including pressure, temperature, and calculated values. Graphical data trends over 30 minutes are available for dynamic analysis.
- Using the Testo Smart App: For advanced functionality, use the Testo Smart App. The app provides a comprehensive interface for controlling the manifold, viewing measurements, and generating reports.
- Refrigerant Selection: The manifold has over 90 refrigerants stored. Select the correct refrigerant type for accurate calculations. The device supports A2L and A3 refrigerants.
Maintenance
Proper maintenance ensures the longevity and accuracy of your Testo 558s.
- Cleaning: Wipe the unit with a damp cloth. Do not use abrasive cleaners or solvents. Ensure the display and ports are free of debris.
- Storage: Store the manifold and accessories in the provided hard case in a dry, temperate environment when not in use.
- Battery Care: If using rechargeable batteries, charge regularly. If using AA batteries, remove them if the unit will not be used for an extended period to prevent leakage.
- Firmware Updates: Periodically check for firmware updates via the Testo Smart App or Testo's official website to ensure optimal performance and access to new features/refrigerants.
- Calibration: Regular calibration by authorized service centers is recommended to maintain measurement accuracy.
Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Unit does not power on. | Low or depleted battery; Incorrect battery installation. | Charge the internal battery or replace AA batteries. Ensure correct polarity. |
| Inaccurate readings. | Probes not properly connected; Incorrect refrigerant selected; Unit requires calibration. | Check probe connections. Verify refrigerant type. Consider professional calibration. |
| Bluetooth connection issues. | Bluetooth disabled on device; Unit too far from mobile device; App not updated. | Ensure Bluetooth is enabled. Move closer to the unit. Update Testo Smart App. Restart both devices. |
| Display unresponsive. | Software glitch; Extreme temperature conditions. | Perform a soft reset (refer to specific device instructions if available). Operate within specified temperature range. |
Warranty and Support
The Testo 558s AC Manifold Gauge Set is manufactured by Testo SE & Co. KGaA. For specific warranty information, technical support, or service inquiries, please contact Testo customer service or visit their official website. Keep your proof of purchase for warranty claims.
Manufacturer: Testo SE & Co. KGaA
Website: www.testo.com (Please refer to the official Testo website for the most current contact and support information.)
