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- Check whether MV11, MV12, and the rotatable hand valve are closed (see the picture).
Note: ensure MV11 is kept closed when you perform the following steps. - Open the rotatable hand valve and then bleed from MV12 a few times (open-close MV12 multiple times to flush), then leave the MV12 cracked open (to have only a little flow).
- Connect the white tube's one end to the port after MV12 and let gHe flush through the other end before connecting to the purity meter.
- Connect the other end of the white tube to the purity meter inlet while there is a little gHe flow.
- Measure the purity, and take a picture of the reading (, send it to the target-expert (or to the target-group if possible), make a elog entry (with date, time, location, and purity).
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