How to export a whole sequence of ChemStation runs to CSV at once

A sequence of 30 injections is 30 .D folders. Exporting each run from the data system, signal by signal, is slow and easy to get wrong. Nagura Lab opens the whole folder in one go and writes every signal of every run to CSV in a single ZIP.

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Open the whole sequence

Open Nagura Lab, click Open data and pick Folder. Choose the folder that holds your runs, or drag it onto the page. Every .D folder inside is opened. Not sure where the data is? See find a ChemStation run on disk.
To add more, use Add more. .dx and .cdf files and the other formats Nagura Lab reads can be mixed with the .D runs.
Below the chart, the Batch tools card appears.

Download everything

Under Export everything, click Download all N runs (ZIP of CSV). The ZIP is built on your computer and saved as nagura-batch-export.zip. It holds:

runs.csv: one line per run with the sample, date, method, vial, operator and the list of signals.
One folder per run, named after the run (characters that file names do not allow become _; two runs with the same name get _2).
In each folder, one CSV per signal, named after the signal file, for example DAD1B.ch.csv. The first column is Time (min), the second the signal with its unit in the header.

A diode-array or mass-spectrum file adds one chromatogram: the mean over its wavelength range for DAD, the total ion chromatogram for MS (DAD1.UV_overview.csv, MSD1.MS_overview.csv). To get the full spectra matrix of every run instead, tick Include full DAD/MS spectra matrices (large) before you download; those files are big.

The run table

Download run table (CSV) saves nagura-runs.csv, the same table that is shown on the page: run, sample, date, method, vial, operator and signals. It is a quick log of what a sequence contained.

Good to know

Each run exports the signals it has. If a signal is missing from some runs, those runs simply have no file for it.
Nothing is uploaded. The files are decoded and zipped in your browser.
The batch tools work on your first 3 runs. For more runs they are free during early access with a verified email, for a limited time (details).
For one run at a time, see export a ChemStation .D folder to CSV.