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Instrument & firmware compatibility for MiniProf Criterion 4
Firmware compatibility

Your MiniProf instrument must be running firmware version 4.2.0 or newer to connect to MiniProf Criterion Version 4.0 or later.

You find the instrument’s firmware version here:

MiniProf instrument settings screen showing firmware version field

If your instrument is using an older firmware version, you have the following options:

1. Upgrade your instrument firmware

Firmware upgrades are automatically included as part of a standard service and re-calibration, whether performed by us or your local MiniProf agent.

If needed, you can also send in your instrument specifically for a firmware upgrade, without a full service.

For more information, please contact us at miniprof@greenwood.dk.

2. Continue using MiniProf Criterion Version 3.0 for Android

If your instrument’s firmware has not yet been updated, you can keep using MiniProf Criterion Version 3.0 for Android, which remains fully compatible with older firmware.

To install this version:

Already installed Version 4.0?

If you have already installed MiniProf Criterion 4.0 on your Android device and need to downgrade to Version 3.0 for compatibility reasons, simply:

Instrument compatibility

For detailed information on instrument compatibility, please refer to the Criterion Compatibility Chart.

Attending APTA Rail Conference 2026 in Baltimore?
Visit our MiniProf agent, KLD Labs, Inc., an ENSCO Company, at booth 213 to experience the MiniProf systems and versatile Envision software firsthand.

To ensure time for a personal walkthrough, we encourage you to contact the KLD MiniProf team in advance to schedule a meeting.

Attending Rolling Stock Networking 2026 in Derby?
Visit our MiniProf agent, CoMech Metrology, at stand E3 to experience the MiniProf systems and versatile Envision software first-hand.

To ensure time for a personal walkthrough, we encourage you to contact the CoMech MiniProf team in advance to schedule a meeting.

How can we assist you?

The MiniProf team is here for you! If you have any questions about our MiniProf products, Envision software, Criterion app, local agent details, re-calibration or any of our other services, do not hesitate to contact us – we will be pleased to assist.

Register for our free webinars

Scheme Builder and Scheme Measurements

25 April 2021 at 9:30 (CET) or
26 April 2021 a7 15:00 (CET)

Smart Features

28 April 2021 at 9:30 (CET) or
28 April 2021 a7 15:00 (CET)

Register for our free webinars

Rail Profile Analyses and Technical Details

26 April 2021 at 9:15 or 14:45 (CET)

Wheel Profile Analyses and Technical Details

28 April 2021 at 9:15 or 14:45 (CET)

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General information

Product & software support

Please make sure that your MiniProf instrument and laptop/tablet are fully charged.

Service & re-calibration