What You'll Learn

• What data a digital manifold provides to measureQuick and how the app uses it
• Which manifolds are compatible and how they differ
• How hose connections and manifold hose length correction affect pressure accuracy
• How manifold data appears on the diagnostic screen
• When to use a manifold vs individual wireless pressure probes
• How to zero and verify your manifold before each use

What You'll Need

• Device: iPhone (iOS 15+) or Android phone/tablet (Android 10+) with measureQuick installed
• Account: measureQuick account with active subscription
• Manifold: One compatible digital manifold (Fieldpiece SMAN, Testo 550/557/560, NAVAC NX1/NX4, Yellow Jacket TITANMAX, JB CLIMATE CLASS, or Seitron Be Cool Evo M4S)
• Hoses: Standard 1/4" SAE flare refrigerant hoses
• Temperature probes: Pipe clamp temperature probes (wired into the manifold or wireless via BLE) for superheat/subcooling calculation
• Knowledge: Bluetooth pairing fundamentals (see C2), Fieldpiece or Testo pairing (see or C4)
• Time: 5-10 minutes to read

What a Manifold Provides to measureQuick

A digital manifold streams three categories of data to the app:

Pressure readings. High-side (liquid/discharge) and low-side (suction) refrigerant pressures. These are the primary measurements the manifold contributes. measureQuick receives the raw PSI values in real time.

Saturation temperatures. The manifold calculates saturation temperature from the measured pressure and the selected refrigerant type. measureQuick also calculates saturation temperature independently using the same pressure data. The refrigerant type must match between the manifold and the app; otherwise the saturation values will disagree.

Vacuum level (select models). Fieldpiece SMAN manifolds include a built-in vacuum gauge that measures 50-9,999 microns. This data streams to measureQuick during evacuation workflows. Testo manifolds do not measure deep vacuum internally; you need an external vacuum gauge for evacuation verification.

What the manifold does not provide: Temperature. A manifold measures pressure, not pipe temperature. For superheat and subcooling, measureQuick needs both pressure (from the manifold) and pipe temperature (from separate temperature probes). Some manifolds have thermocouple ports for wired temperature clamps, which report through the manifold's Bluetooth connection. Wireless pipe clamps (Fieldpiece JL3PC, Testo 115i) are separate BLE devices.

Compatible Manifolds

All manifolds connect to measureQuick via Direct BLE except iManifold/iConnect, which uses App-to-App through the iManifold companion app.

Hose Connections

Digital manifolds use standard 1/4" SAE flare fittings for refrigerant hose connections. Connect hoses from the manifold's service ports to the system's high-side and low-side access valves.

Manifold Hose Length Correction

Longer hoses create more pressure drop between the system's service valve and the manifold's pressure sensor. On a short hose (3-4 feet), the drop is negligible. On a longer hose (6+ feet), the pressure difference can affect superheat and subcooling calculations by 1-3F.

measureQuick accounts for this. In the test profile settings, you can specify the hose length. The app applies a correction factor to adjust the pressure reading for the estimated drop through the hose. This is especially relevant on systems with low pressure differentials where a small PSI error shifts the calculated superheat or subcooling.

Best practice: Use the shortest hoses practical for the job. If you must use longer hoses, enter the correct hose length in the app so the correction is applied.

How Manifold Data Appears in measureQuick

When a manifold connects, pressure data populates the diagnostic screen in real time:

1. Pressure gauges. High-side and low-side pressures display as live-updating values. The app shows both PSI and the calculated saturation temperature.
2. Superheat/subcooling calculation. Once pipe clamp temperatures are also connected (via wired or wireless probes), measureQuick automatically calculates superheat (suction line temp minus suction saturation temp) and subcooling (liquid saturation temp minus liquid line temp).
3. Target zones. The app compares measured superheat and subcooling against calculated targets based on the equipment profile, outdoor temperature, and indoor conditions. Green indicates within range; red indicates out of range.
4. Charge evaluation. With all required measurements populated (pressures, temperatures, airflow, outdoor ambient), measureQuick evaluates refrigerant charge status and displays a pass/fail result.

Diagnostic screen with live manifold pressure readings and calculated superheat/subcooling values

Manifold vs Individual Wireless Pressure Probes

You can measure refrigerant pressure with either a manifold or individual wireless probes. Each approach has trade-offs.

Manifold Advantages

• Measures both high-side and low-side simultaneously through one Bluetooth connection
• Built-in display provides a backup reading independent of your phone
• Integrated hose connections simplify setup
• Some models include vacuum measurement for evacuation
• Familiar form factor for technicians accustomed to analog manifolds

Individual Probe Advantages

• Each probe is small and can be placed directly at the access valve, minimizing hose length and pressure drop
• No manifold body or hoses to manage
• Can be deployed independently at different locations on the system
• Useful when you only need one pressure measurement (e.g., checking suction pressure alone)

When to Use Each

Use a manifold for standard refrigerant diagnostics where you need both pressures and plan to connect hoses for charging or recovery. Use individual wireless probes when you want a quick pressure check without full manifold setup, or when hose length would introduce significant error.

Zeroing and Calibration

Before each use, zero your manifold to ensure accurate readings.

Zeroing Procedure

1. Disconnect all hoses from the manifold so the sensors are open to ambient air.
2. Power on the manifold and wait for the display to stabilize (10-15 seconds).
3. Use the manifold's zero function (varies by model; consult the manufacturer's manual for the specific button sequence).
4. Verify both high-side and low-side read 0 PSI (or local atmospheric pressure if the manifold displays absolute pressure).

When to Zero

• At the start of each workday
• When moving between jobs (temperature changes affect sensor baseline)
• If readings seem inconsistent with system behavior (e.g., pressures that do not match expected values for the refrigerant and outdoor temperature)

Annual Calibration

Manufacturer calibration on a 12-month cycle ensures long-term accuracy. Some manufacturers (Fieldpiece, Testo) offer calibration services or sell calibration verification kits. Between annual calibrations, the zeroing procedure above keeps readings reliable for daily use.

Tips & Common Issues

Pressure readings in the app do not match the manifold display

Check the refrigerant type. The raw PSI values should match exactly between the manifold display and the app. If the saturation temperatures differ, the refrigerant type is set differently in the manifold and measureQuick. Align both to the same refrigerant.

Superheat and subcooling are not calculating

measureQuick needs both pressure (from the manifold) and pipe temperature (from temperature probes) to calculate superheat and subcooling. If only the manifold is connected without temperature probes, pressures display but superheat/subcooling remain blank. Connect pipe clamp probes to the suction and liquid lines.

Manifold shows vacuum but the system is pressurized

The manifold's vacuum sensor and pressure sensor operate in different ranges. If the manifold is reading vacuum when the system has refrigerant pressure, the hose connection may be loose or the service valve may be closed. Verify that hoses are tight and service valves are open.

Hose length correction is not available for my manifold

Not all manifold-app combinations support hose length correction in the test profile. If the field is not available, use the shortest hoses practical and note the hose length in the project comments for reference.

Related Articles

Prerequisites (complete these first):

• Bluetooth Pairing Basics
• Fieldpiece Probe Pairing

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

• Probe Manager
• Bluetooth Troubleshooting
• Superheat & Subcooling
• Refrigerant Charge Diagnostics

Related in the same domain:

• Smart Tool Overview
• Testo Manifold Pairing
• All Bluetooth Probes Reference
• BluVac Integration (for evacuation vacuum measurement)

Need Help?

If you have questions about manifold setup or pressure readings in measureQuick:

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