Measure Fitting Unit is displayed as Not connected

Product(s): Measure
Applies to version: All current versions
Audience: External – Customers
Difficulty: Intermediate
Estimated resolution time: 15–25 minutes
Last updated: 2026-06-27
Article type: Troubleshooting guide

Quick summary

The Measure Fitting Unit (Measure device) shows as "Not connected" in the Measure status bar. This guide walks through cable checks, USB troubleshooting, Windows device recognition, serial number verification, security settings, and OS compatibility.

⚙️ Before you begin

Make sure Measure is open and running.
Have a spare USB cable available for testing.
You'll need access to Windows Device Manager.

Step 1: Check cable connections

Is the Measure device properly connected with the USB cable and power supply?

✅ Yes → Proceed to Step 2.
❌ No → Disconnect and firmly reconnect the USB cable and power supply. Check if the Measure device now shows as connected in Measure.

→ Check if the issue is resolved. If yes - you're done ✓. If no - continue to Step 2.

Step 2: Try an alternative USB connection

Is the Measure device connected directly to a USB port on the PC (not through a hub, switch, or extension)?

✅ Yes, and using the original cable → Proceed to Step 3.
❌ No → Take these steps:

Remove any USB hub, switch, or extension cable.
Connect the Measure device directly to a USB port on the PC.
If still not detected, try a different USB port on the PC.
If still not detected, try a different USB cable.

→ Check if the issue is resolved. If yes - you're done ✓. If no - continue to Step 3.

Step 3: Verify device recognition in Windows

Is the Measure device listed under Sound devices in Windows Device Manager?

✅ Yes → Proceed to Step 4.
❌ No → Use the USBDeview tool (nirsoft.net) to check whether the PC can see the Measure device at all. If the device is not visible via USBDeview, the board or cable may be faulty - contact Auditdata Support.

→ Check if the issue is resolved. If yes - you're done ✓. If no - continue to Step 4.

Step 4: Confirm the device serial number

Does the serial number of the Measure device match the serial number registered in Measure?

✅ Yes → Proceed to Step 5.
❌ No → The serial numbers must match for the device to connect. Contact Auditdata Support - this may require a licence update.

→ Check if the issue is resolved. If yes - you're done ✓. If no - continue to Step 5.

Step 5: Check security software settings

Could antivirus software or a firewall be blocking the Measure device connection?

✅ Yes → Adjust your antivirus or firewall settings to allow Measure connections. Temporarily disabling security software to test the connection can help confirm whether it is the cause.

→ Check if the issue is resolved. If yes - re-enable security software and add Measure as an exception ✓. If no - continue to Step 6. * ❌ No → Proceed to Step 6.

Step 6: Verify operating system compatibility

Are you running Windows RT?

✅ Yes → Measure does not support Windows RT. You will need to use a PC running a compatible version of Windows. Contact Auditdata Support for guidance on supported operating systems.
❌ No → Proceed to the escalation path below.

🔺 Escalation path

If none of the above steps resolved the issue, contact Auditdata Support.

Please have ready:

Device model and serial number
Device firmware version
Software version
Your account name and contact details
Which steps above you already tried
Any error messages or unusual behaviour observed

✅ Expected outcome

After completing these steps, the Measure Fitting Unit should show as connected in the Measure status bar, allowing you to proceed with your work normally.

📝 Additional notes

USB hubs and extension cables are a common cause of intermittent connection issues - always test with a direct connection first.
Keep Measure updated to the latest version to avoid similar connectivity issues.
Related articles: Fitting/HIT Unit Not Connecting or Functioning Correctly · Device Unresponsive – Power LED Always On, Measure Board Not Recognized by PC · Transducer Not Detected or Misidentified

Need more help? Visit the Auditdata Help Centre or contact our support team.