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. 2020 Feb 27;27(Pt 2):360–370. doi: 10.1107/S1600577520000685

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© Mehrabi et al. 2020

This is an open-access article distributed under the terms of the Creative Commons Attribution (CC-BY) Licence, which permits unrestricted use, distribution, and reproduction in any medium, provided the original authors and source are cited.

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The vacuum control unit. (a) View of the front panel. From left to right: mains switches for the control unit (S1) and the pump (S2), a connector for the foot paddle (P3), control switches for the vacuum (S3), and filter insertion to control the vacuum ramp up/down (S4). Vacuum level (Pot1) and filter insertion rate (Pot2) can be adjusted using analogue potentiometers. An outlet port with push-in fitting (F3) connects the vacuum pump to the chip-loading block and an analogue pressure gauge (G1) aids in setting the desired backpressure. (b) View of the back panel. From left to right: 230 V power socket (P1), vent to atmosphere (F2), inlet port with push-in fitting connecting to the vacuum pump (F1) and membrane pump power feed-through (P2).