The built-in high-pressure gas storage system should be filled via the appropriate connection. Three differential pressure gauges are built in to display the internal pressure system, control pressure and output pressure. The maximum test pressure is set by the pressure regulator. The output pressure at the two test connections is precisely controlled by two precision needle valves and the balanced volume regulator. The connected reference pressure gauge indicates the preciise pressure at the test port. Externally generated pressure can also be measured via the test connection. The teostel is supplied with quick-connect test and fill hose, a 1⁄4″ NPT male adaptor for the test connection and connection for refilling.

