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For checking the purity of hydrogen (H2) in H2-cooled generators and synchronous converters, and for monitoring the safe purging of H2 during shutdown or startup. Will also measure oxygen (O2) level inside of generator, including during H2 purity operation. The Nova Model 382 Tri-Gas Analyzer with separate O2 channel is designed for monitoring the H2 purity inside a power generator and to monitor the purging procedure during a generator shutdown or startup. It can also measure oxygen content in a hydrogen atmosphere. The separate O2 sensor and display remain active regardless of which other range is selected.

The analyzer contains a temperature-compensated thermal conductivity (T/C) cell, electrochemical O2 sensor, amplifier board, digital readout, range switch, pressure regulator, gas flow control valve, pump, and a flow indicator. Recorder outputs for active T/C range and O2 channel are included.

The T/C cell does not burn the sample nor is it consumed in any way, so it has a life expectancy of over 10years usually. Electrochemical O2 sensor is also of the long-life style lasting approximately 4-5 years. Measurement results are fast and accurate. A rechargeable 'gel cell' battery provides enough power for about 8 hours of continuous operation and the analyzer can be used while it is being recharged.

Unit of Measure

Specifications

Method of Detection

N/A Thermal-conductivity (T/C) cell for H2; Electrochemical sensor for O2

Ranges Available

N/A Range 1: 0-100% H2 in Air
Range 2: 0-100% H2 in CO2
Range 3: 0-100% Air in CO2
Separate Range: 0-25.0 % O2

Resolution

N/A 0.1% of gas measured

Accuracy & Repeatability

N/A Range 1: ± 1% of Full Scale; Range 2 & 3: ± 2% of F.S.; O2 Range: ± 1% of F.S.

Drift

N/A H2 in CO2, Air in CO2, & O2 ± 2% F.S. per week maximum drift; 0-100% H2 in Air range is ± 0.4% per week maximum

Response Time (T-90)

N/A 10-15 seconds to 90% step change - not including sample transport time

Ambient Temperature Range

N/A 0 to 50 ºC32 to 120 ºF

Linearity

N/A ± 1.0% of F.S. on H2 in Air & O2 range. ± 2% of F.S. in H2 & Air in CO2 ranges

Size & Weight

N/A 9 1/2" L x 7" W x 6 1/2" H @ 12 lbs (24 x 17 x 18 cm @ 3.6 kg)

Power

N/A AC/DC Operation. 115 VAC, 60 Hz for recharging (220 VAC, 50 Hz available)

Output Options

N/A 4-20 mA or 0-1 VDC

Hazardous Area Rating Options

N/A General Purpose, Non-Hazardous

Applications

N/A For checking the purity of hydrogen (H2) in H2-cooled generators and synchronous converters, and for monitoring the safe purging of H2 during shutdown or startup. Will also measure oxygen (O2) level inside of generator, including during H2 purity operation.

Features

N/A

  • Rugged design that is easy to operate
  • Fast warm up and response
  • Monitors 0-100% H2 in air, 0-100% H2 in CO2, 0-100% Air in CO2
  • Rugged long life thermal conductivity cell
  • Digital readout meter with backlight
  • Rechargeable battery operation
  • Modular layout that is easy to maintain
  • Built in flow meter, flow control valve and pump
  • Built in pressure regulator prevents over pressuring of pump and sensor
  • Weatherproof (WP) cabinet with clear lexan cover
  • Sample pressure ranges 0.5 PSI to 125 PSI

Options

N/A

  • Recorder outputs of 0-1 V or 4-20 mA
  • Suitcase (K) style cabinet available

Unique Applications

N/A

    All Nova analyzers are built using proven technologies and techniques. If this product does not suit your application, please contact Nova. In many cases, we are able to build an analyzer specific to your needs.

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