This document is an instruction manual for Varian Vacuum Technologies 571 Ionization Gauge Tube, describing the features and characteristics of the product.
The Varian Type 571 Ionization Gauge is a wide-range, linear, rugged Bayard-Alpert type vacuum gauge that employs a burn-out resistant thoriated-iridium filament. It provides superior performance in stressful environments by using a platinum shield to prevent external electrical fields from affecting the low ion current and a conductive coating to drain static charge.
The gauge is useful for measuring vacuum over a pressure range from 1 mT down to 5x10^-9 T.
This device employs a burn-out resistant thoriated-iridium filament.
The system ground must be capable of supporting at least 10 A.