Envent Engineering Ltd. Page 7 Revision 2.4
Parts Per Billion Utilized when analyzer requires to read in parts per billion (<1 ppm)
Low Tape Sensor Utilized when an alarms is required when the H2S sensing tape needs
to be changed
Low Pressure
Switch
Utilized for alarming when sample pressure drops below 10 PSI
AO Powered
Boards
Utilized for loop-powered analog outputs
Expander AO
Board
Utilized when more than two analog outputs are required
Ethernet Port Utilized for TCP/IP communication capabilities
Auto Calibration Utilized to initiate a calibration based on time of day or manually
Table 1. 330S/331S H2S Analyzer Specifications
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