436 SERIES TRI-GAS ANALYZER FOR MONITORING PURITY AND PURGING OF HYDROGEN COOLED POWER GENERATORS APPLICATIONS For continuous analysis of hydrogen (H2) purity and for purge monitoring of hydrogen-cooled generators and synchronous converters. FEATURES • One analyzer monitors all 3 gases for purity (Range 1) or purging (Ranges 2 and 3): • Range 1: 0-100% H2 in Air • Range 2: 0-100% H2 in CO2 • Range 3: 0-100% Air in CO2 • Bright digital readout • 4-20 mA isolated output for 85-100% of H2 in Air • Thermal-conductivity cell with high accuracy and repeatability, cannot be burned out. • Explosion-proof gas detector enclosure suitable for Class 1 Division 1 Group BCD rated areas • Fast response (T90 -10 to 15 secs) • Built in pressure regulator OPTIONS • Isolated 4-20mA output for any range selected • 2 levels of low H2 purity alarms & detector fail alarm • Automatic Calibration by microprocessor control available on N7MC configuration • Serial output with data-logging software • Oil vapor filter assembly NEMA 7 Gas Detector Cabinet Choice of Control Cabinet as follows: NEMA 4 Control Cabinet 19" Rack Mount Control Cabinet NEMA 7 Control Cabinet CALIBRATION • Channel 1 - Air for Zero, 100% H2 for Span • Channel 2 - 100% CO2 for Zero, 100% H2 for Span • Channel 3 - 100% CO2 for Zero, Air for Span NOVA ANALYTICAL SYSTEMS www.nova-gas.com Oil Vapor Filter Assembly - protects analyzer from sensor fouling caused by oil-vapors from power generator

DESCRIPTION The Nova Model 436RMN7 Tri-gas analyzer is designed specifically for monitoring H2 purity in a power generator and to monitor the purging procedure during shut down. The analyzer can measure the following gases by switch selection: Range 1: 0-100.0% H2 in Air; Range 2: 0-100.0% H2 in CO2; Range 3: 0-100.0% Air in CO2. An isolated 4-20 mA recorder output is provided for the range of 85-100% H2 in Air. The Model 436 analyzer is typically divided into 2 sections which are electrically connected. The control section contains the main microprocessor board as well as the digital readout...