NOVA 382K PORTABLE TRI-GAS ANALYZER FOR HYDROGEN PURGING

Alat Laboratorium Lingkungan

PORTABLE TRI-GAS ANALYZER FOR HYDROGEN / CARBON DIOXIDE / AIR PURGING WITH SEPARATE OXYGEN DISPLAY MODEL 382K

APPLICATIONS

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
• Rugged design, easy to operate, fast warm up and response
• Monitors 0-100% H2 in air, H2 in CO2, Air in CO2 by rugged long-life thermal conductivity cell
• Long-life electrochemical sensor for separate display of O2
• Digital readout meters with backlight
• Rechargeable battery operation
• Built-in flow meter, flow control valve, and pump
• Built-in pressure regulator prevents over pressuring of pump and sensor
• Suitcase cabinet has carry handle and is weatherproof when closed
• Sample pressure ranges 0.5 PSI to 125 PSI

RANGES

• 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

DESCRIPTION

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 10 years 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.

SPECIFICATIONS
Description
Method of Detection: Thermal-conductivity (T/C) cell for H2; Electrochemical sensor for O2
Ranges Available: 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: 0.1% of gas measured
Accuracy and Repeatability: Range 1: ± 1% of Full Scale; Range 2 & 3: ± 2% of F.S.; O2 Range: ± 1% of F.S. 
Drift: H2 in CO2, Air in CO2, & O2 ± 2% F.S. per week maximum drif,
         0-100% H2 in Air range is ± 0.4% per week maximum
Response Time (T-90): 10-15 seconds to 90% step change - not including sample transport time
Ambient Temperature Range: 32-120°F (0-50°C)
Linearity: ± 1.0% of F.S. on H2 in Air & O2 range. ± 2% of F.S. in H2 & Air in CO2 ranges
Size and Weight : Approx. 9½" L x 7" W x 6½" H @ 8 lbs (24 x 17 x 18 cm @ 3.6 kg)
Power: 115VAC 60Hz for recharging (220VAC 50Hz available)
Output Options: 4-20 mA or 0-1 VDC