For checking purity of hydrogen (H2) in H2-cooled generators and synchronous converters. The Model 381 Series will also monitor the safe purging of H2 during shutdown or startup. This model is designed specifically for generators that are purged with nitrogen (N2) instead of carbon dioxide (CO2).
The Nova 381 Series Tri-Gas Analyzer is designed for monitoring the H2 purity inside a power generator and to monitor the purging procedure during a generator shutdown or startup. This analyzer is specifically for generators that are purged with N2 instead of the more commonly-used CO2. The analyzer contains a temperature compensated thermal conductivity (T/C) cell, electochemical O2 sensor, amplifier board, digital readout, range switch, pressure regulator, gas flow control valve, pump and a flow indicator. A 4-20mA recorder output is standard.
The T/C cell does not burn the sample nor is it consumed in any way, so it has a life expectancy of over 10 years. The electrochemical O2 sensor typically has 3-5 year life and is easy and inexpensive to replace. Measurement results are fast and accurate. A rechargeable battery provides enough power for about 4-6 hours of continuous operation and the analyzer can be used while it is being recharged.
Specifications
Method of Detection |
N/A Thermal conductivity (T/C) cell, electrochemical O2 sensor |
Ranges Available |
N/A
Range 1: 0-100% H2 in Air Range 2: 0-100% H2 in N2 Range 3: 0-100% Air in N2 |
Resolution |
N/A 0.1% of gas measured |
Accuracy & Repeatability |
N/A ±1% F.S except in 85-100% H2 in Air range, which is within 0.5% absolute H2 |
Drift |
N/A H2 in N2 or Air in N2, ± 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 range. ± 2% of F.S. in H2 or Air in N2 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 Battery operation. 115 VAC, 60 Hz for recharging (220 VAC, 50 Hz available) |
Output Options |
N/A 4-20mA |
Hazardous Area Rating Options |
N/A General Purpose, Non-Hazardous |
Applications
|
N/A For checking purity of hydrogen (H2) in H2-cooled generators and synchronous converters. |
Features
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N/A
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