How to Build a Multi-Channel Data Logger Without LabVIEW

Most engineers assume a serious multi-channel data logger means LabVIEW. It does not. You can build a repeatable, multi-channel data logging system without LabVIEW, without its license cost, and without the graphical program that one person ends up maintaining. This guide compares data logging systems and shows how to automate acquisition from the datasheet with TestFlow.

What a multi-channel data logger needs to do

Whatever tool you use, a data logger has the same requirements:

• •Connect to instruments and DAQ hardware across many channels.
• •Configure sensor types, ranges, and scaling per channel.
• •Scan channels on a schedule and timestamp every reading.
• •Store the data reliably and export it for analysis.
• •Run unattended and repeatably.

The usual options and their costs

• •LabVIEW: powerful and real-time capable, but expensive per seat, slow to learn, and the program becomes tribal knowledge.
• •Onboard instrument logging: simple, but limited in channels, logic, and export, and tied to one instrument.
• •Vendor software like BenchVue: code-free and quick, but single-vendor and license-gated for advanced logging.
• •Hand-written Python with PyVISA: free and flexible, but fragile and high-maintenance.
• •Low cost data loggers: cheap standalone units, but limited configurability and hard to fold into a larger test.

Each works for some cases. None gives you vendor-neutral, shareable, datasheet-driven logging without effort.

Building the logger without LabVIEW: TestFlow

TestFlow lets you build a multi-channel data logger as a workflow, not a program.

• •Datasheet to logging plan. Upload the datasheet for your DAQ unit or sensors, and TestFlow builds the channel configuration and scan sequence.
• •No LabVIEW, no SCPI by hand. TestFlow generates and runs the instrument commands, so there is no VI and no script to maintain.
• •Vendor-neutral. Combine a Keysight DAQ970A or 34972A with a non-Keysight DMM or supply in one logging run.
• •Repeatable and shareable. The logger runs identically on any machine and can be shared across a team.
• •Open execution. Runs use the TestFlow runner or the cloud runner on GitHub.

You do not need a LabVIEW license to log data well

Multi-channel data logging is a configuration problem, not a programming project. Describe the channels and the scan, and let TestFlow run it.

Start free at testflow.io, upload your DAQ datasheet, and build a multi-channel data logger without LabVIEW in minutes.