Nova Analytical Systems
Canada
270 Sherman Avenue N.
Hamilton, ON L8L 6N5
Phone: (905) 545 2003• Fax: (905) 545 4248
Email: sales@nova-gas.com or websales@nova-gas.com United States
1925 Pine Avenue
Niagara Falls, NY 14301
Phone: (716) 285-0418 • Fax: (716) 282-2937
Print Back

The Nova Model 436 Series Tri-gas analyzer is designed specifically for monitoring H2 purity in the H2 feed to 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
A 4-20 mA output is provided for the range of 85-100% H2 in air, along with two gas alarms and a sensor fail alarm.
Unit of Measure

Specifications

Method of Detection

 Temperature controlled thermal conductivity (T/C) cell, cannot be burned out due to loss of flow or changing gases

Ranges Available

 Range 1 : 0-100% H2 in Air Range 2 : 0-100% H2 in CO2 Range 3 : 0-100% Air in CO2

Resolution

 ±0.1% of gas measured

Accuracy & Repeatability

 ±1% F.S except in 85-100% H2 in Air range which is within 0.2% absolute H2

Drift

 H2 in CO2 or Air in CO2 1% F.S. per week maximum drift, 0-100% H2 in Air range is ±0.2% per week

Response Time (T-90)

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

Ambient Temperature Range

 0 to 49 ºC32 to 122 ºF

Linearity

 ±0.4% of F.S. on H2 in Air range, ±1% of F.S. in H2 or Air in CO2 ranges

Size & Weight

 Dimensions will vary depending on enclosure style and options required

Power

 115 VAC, 60 Hz 220 VAC, 50 Hz

Output Options

 4-20 mA into 500 ohms non-isolated standard Isolated 4-20 mA, RS232, RS485, MODBUS, Ethernet outputs

Alarms

 Alarm set points are field adjustable Alarms have front panel light for each alarm and SPST (normally energized) relay with 5A rating at 250VAC non-inductive load Dual alarms are provided for low H2 purity. Detector fail alarm also provided as standard

Primary Gas to be Measured

 Carbon Dioxide (CO2) Hydrogen (H2)

Industry Type

 Power Industry

Mounting Options

 Panel Mount Rack Mount

Models and Enclosure Options

 NEMA 4

Applications

N/A

    For continuous analysis of hydrogen (H2) purity and for purge monitoring of hydrogen-cooled generators and synchronous converters.

Features

N/A

  • 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
  • Best value continuous tri-gas analyzer
  • Bright digital readout, 4-20 mA Outputs
  • Long life electrochemical 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, UL/FM/CSA certified
  • Fast response (T90 -10 to 15 secs)
  • Easy to maintain modular layout
  • Built in pressure regulator

Options

N/A

  • Isolated analog, RS232, RS485, MODBUS and Ethernet output available options.
  • Auto calibration option which includes the following features :
    • Touch-screen display for easy entry of calibration gas settings, alarm set points, and calibration frequency
    • One-touch 'cal-now' button (magnetic switch in explosion proof control cabinet) permits easy, and complete calibration without needing to open cabinet cover

Calibration

N/A

  • 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