The designer of this analyzer failed on two major points:
- He specified all sample tubing to be 1/8″ OD. This is OK for some parts of the internal gas handling system but not for all parts of the sample tubing.
- He did not include a flow restrictor at the sample inlet.
Fix / upgrade / resolution:
- Change the reaction chamber exhaust tubing to 1/4″ OD Versillon or Tygon or Neoprene tubing. Also change the BPR exhaust lines to 1/4″ OD tubing.
- Install a special, modified (with embedded restrictor), adapter at the sample inlet (4-4 TRBZ-SS or 2-4 TRBZ-SS) at the inlet (it attaches directly to the OEM’s SAMPLE INLET port). RIGAS makes these on demand.