What You'll Learn

• How to pair Testo 550i, 550s, 557s, and 560i digital manifolds with measureQuick
• How to pair Testo Smart Probes (115i, 549i, 605i, 510i) individually
• What data streams from Testo manifolds and smart probes to the app
• How Testo's 350-foot Bluetooth range compares to other probe ecosystems
• Testo-specific considerations: firmware requirements, multi-probe setup, and refrigerant profiles

What You'll Need

• Device: iPhone (iOS 8.3+) or Android phone/tablet (Android 4.3+) with measureQuick installed
• Account: measureQuick account with Bluetooth permission enabled
• Testo tools: One or more Testo digital manifolds (550i, 550s, 557s, 560i) or Testo Smart Probes (115i, 549i, 605i, 510i)
• Testo Smart App: Install the Testo Smart App (iOS/Android) for firmware updates and probe configuration
• Knowledge: Bluetooth pairing fundamentals (see Bluetooth Pairing Basics)
• Time: 5-10 minutes for initial pairing; 1-2 minutes per probe after the first time

Testo Tool Identification

Testo offers two product lines compatible with measureQuick: digital manifolds and smart probes. Both connect via Direct BLE.

Digital Manifolds

Shared manifold specs: Pressure accuracy +/-0.5% full scale, 2x 7/16 in UNF connections, large graphic display, tightness test function, temperature-compensated leak test, Bluetooth connectivity. Vacuum measurement requires an external probe (the manifold's internal sensors do not measure deep vacuum).

Smart Probes

Shared smart probe specs: Bluetooth 4.0, 350-foot wireless range, 150-hour battery life per probe (AAA batteries), 90+ refrigerant profiles in the Testo ecosystem.

Complete Smart Probe Kit ($1,423.49): 2x 549i, 3x 605i, 3x 115i, 2x 510i, 2x CPS 1/4 in SAE tee valve connectors, 30x AAA batteries, Testo HVAC soft case. Total: 10 probes.

Testo smart probes: two 915i temperature probes with Testo App readings, alongside analog thermometer and hygrometer for comparison

Section 1: Pairing Testo Digital Manifolds

Testo digital manifolds connect directly to measureQuick via BLE. The manifold streams pressure readings and, if temperature clamps are connected to the manifold's thermocouple ports, temperature readings as well.

Step 1: Power On the Manifold

Press the power button on the Testo manifold. Wait for the display to complete its startup sequence. The Bluetooth radio activates automatically on the 550i, 550s, 557s, and 560i models.

Step 2: Connect Hoses and Temperature Clamps

Attach your refrigerant hoses to the manifold's ports. If using Testo's wired temperature clamps (NTC probes), plug them into the manifold's temperature ports. These clamps report through the manifold's Bluetooth connection, not as separate devices.

Key point: Wired temperature clamps plugged into the manifold report as part of the manifold in measureQuick. You do not pair them separately. However, Testo 115i wireless pipe clamps are separate BLE devices and must be paired individually (see Section 2).

Step 3: Open measureQuick and Start a Test

From the home screen, start a new project or quick test. Open the Probe Manager by tapping the Bluetooth/probe icon in the workflow toolbar.

Step 4: Scan for the Manifold

Tap Scan or Add Probe. measureQuick scans for nearby Bluetooth devices. The Testo manifold appears in the list, identified by model name (e.g., "testo 557s") and signal strength.

Probe Manager scan results showing a Testo 557s manifold available for pairing

Step 5: Connect and Assign Channels

Tap the manifold name to connect. measureQuick prompts you to assign the manifold's readings to measurement channels:

• High-side pressure to liquid line / condenser pressure
• Low-side pressure to suction line / evaporator pressure
• Temperature port 1 (if connected) to liquid line temperature or suction line temperature
• Temperature port 2 (if connected) to the remaining line temperature

What you see: Live pressure and temperature values populate the workflow screen. The manifold's display and the app should show matching pressure values.

Workflow screen with live Testo manifold data showing high-side and low-side pressure readings

Step 6: Verify Data Streaming

Confirm that:

1. Pressure readings in the app match the manifold's display.
2. Temperature readings (if wired clamps are attached) are updating live.
3. The refrigerant type shown in the app matches what is set on the manifold. If the manifold is set to R410A and the app profile says R22, the saturation temperatures will not match.

Section 2: Pairing Testo Smart Probes

Testo Smart Probes pair individually with measureQuick, each as a separate BLE device. This gives you flexibility to deploy probes independently, anywhere within the 350-foot range.

Step 1: Power On the Smart Probe

Press the power button on the Testo smart probe. Each probe has a single button. The LED indicator lights up to confirm the probe is on and discoverable.

Step 2: Open the Probe Manager

In your active project or quick test, tap the Probe Manager icon.

Step 3: Scan and Select

Tap Scan. The Testo probe appears in the list with its model designation (e.g., "testo 115i" or "testo 549i").

Step 4: Assign to Channel

Tap the probe to connect, then assign it to the appropriate measurement channel:

Step 5: Repeat for Additional Probes

Power on each additional probe and repeat the scan-connect-assign process. The complete Testo Smart Probe Kit provides 10 probes, enough for a comprehensive commissioning:

• 2x 549i for high-side and low-side pressure
• 3x 115i for suction, liquid, and vapor/discharge line temperatures
• 3x 605i for return and supply air psychrometry (wet bulb, dry bulb, humidity)
• 2x 510i for static pressure

Tip: Power on all probes before scanning. measureQuick detects them faster when they are already broadcasting.

Probe Manager showing multiple connected Testo Smart Probes with live readings

Section 3: Using Manifolds and Smart Probes Together

You can pair a Testo manifold and individual Testo Smart Probes at the same time. A common configuration:

• Testo 557s manifold handles refrigerant pressures (high/low) and wired temperature clamps on the suction and liquid lines
• Testo 605i psychrometers (connected separately via BLE) handle return and supply air humidity and wet bulb
• Testo 510i (connected separately via BLE) handles static pressure

Each device maintains its own Bluetooth connection. The manifold does not relay data from wireless smart probes. Wireless probes communicate directly with your phone or tablet.

Section 4: Testo-Specific Considerations

Firmware Updates

Testo releases firmware updates through the Testo Smart App (not measureQuick). If a manifold or probe behaves erratically, fails to connect, or shows incorrect readings:

1. Open the Testo Smart App on your phone or tablet.
2. Connect the manifold or probe in the Testo app.
3. Check for available firmware updates.
4. Apply any updates and wait for the process to complete.
5. Close the Testo Smart App (force-close, not just background) before returning to measureQuick.

Refrigerant Profiles

Testo manifolds support 60 built-in refrigerant profiles. The Smart Probe ecosystem (via the Testo Smart App) supports 90+. Make sure the refrigerant type set on the manifold matches the system profile in measureQuick. Mismatched refrigerant types produce incorrect saturation temperature calculations.

Bluetooth Range: 350 Feet

Testo Smart Probes have a rated wireless range of 350 feet, which is between standard BLE (~100 feet) and Fieldpiece JobLink (~1,000 feet). In practice, with walls and equipment:

For most single-story residential homes, 350 feet is sufficient to maintain connections between indoor and outdoor probes. On larger homes or multi-story buildings, you may still need to use the Hold feature (see Holding Measurements).

Battery Life

All Testo Smart Probes are rated at 150 hours per set of AAA batteries. The manifolds have their own rechargeable or replaceable battery systems. At 150 hours per probe, you can run a full work week of 8-hour days for nearly 4 weeks before needing to replace batteries. Carry spare AAA batteries in your probe kit.

Testo App Must Be Closed

Like other BLE devices, Testo probes connect to one app at a time. If the Testo Smart App is open and connected to a probe, measureQuick cannot connect to that same probe. Force-close the Testo Smart App before scanning in measureQuick.

Video Walkthrough

• Testo 550s, 550i, & 557s support announcement: (3:15, 13.8K views, 132 likes) - Overview of Testo manifold integration with measureQuick

• Testo 550/557 integration walkthrough: (6:14, 19.8K views, 252 likes) - Step-by-step guide to connecting Testo manifolds to the app

• How to add Testo to mQ: (2:39) - Quick tutorial on adding Testo tools to the measureQuick toolbox

• Full app walkthrough with probes: (72 min, 66.5K views) - Comprehensive app walkthrough covering Bluetooth probe connections including Testo context

Tips & Common Issues

Manifold shows pressure but not temperature

Wired temperature clamps must be physically plugged into the manifold's NTC temperature ports. If you are using wireless 115i pipe clamps instead, those are separate BLE devices and must be paired individually in the Probe Manager. Check whether the temperature clamp is wired (plugged into the manifold) or wireless (paired via Bluetooth).

Probe does not appear in the scan list

Confirm the probe is powered on and not connected to the Testo Smart App or another device. Testo probes connect to one app at a time. Force-close the Testo Smart App, then rescan in measureQuick. If the probe still does not appear, power-cycle it (off, wait 5 seconds, on).

Pressure readings do not match between manifold and app

Check the refrigerant type setting. If the manifold displays a saturation temperature based on R410A but measureQuick has the profile set to R22, the raw pressure values should match but derived values (saturation temp, superheat, subcooling) will differ. Align the refrigerant type in both places.

Multiple probes of the same model

If you have three 115i pipe clamps, they appear in the scan list with similar names. To distinguish them, power on one at a time, connect and assign it, then power on the next. Alternatively, note the last digits of the Bluetooth ID displayed during the scan. Some Testo probes display a serial number or short code on the housing.

Vacuum measurement

Testo manifolds do not measure deep vacuum internally. For evacuation testing, you need an external vacuum gauge (see BluVac Integration) connected to the system. The manifold's vacuum measurement capability is limited to coarse readings, not the micron-level precision needed for proper evacuation verification.

Related Articles

Prerequisites (complete these first):

• Bluetooth Pairing Basics

Follow-up articles (next steps after this one):

• Probe Manager
• Bluetooth Troubleshooting
• Outdoor Probe Placement

Related in the same domain:

• Smart Tool Overview
• Fieldpiece Probe Pairing
• BluVac Integration (vacuum gauge for evacuation)

Need Help?

If you get stuck or this article does not answer your question:

• Check the Related Articles section above
• Contact measureQuick support: support@measurequick.com