Operating Manual
3KXG165002R4201_2021_04
ABB PROPRIETARY INFORMATION 63
GLA531 Series LGR-ICOS™ Gas Analyzer
Figure 51 Two-Port Solenoid Driver Board with Cable Connectors
Exhaust Pump
The exhaust pump is a customized dual-head diaphragm vacuum pump. Although it is a robust pump, the
diaphragms wear out eventually and require regular replacements. It is recommended to replace both
diaphragms every year.
Control for the exhaust pump comes from the two-port solenoid driver board, on the second channel, through a
dedicated SSR.
Figure 52 Dual-Head Diaphragm Vacuum Pump with Fittings
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