Apparatus and method for validating the operation of a ppm analyzer

A method of validating the operation of a parts-per-million (PPM) analyzer configured to analyze a multiphase fluid, the fluid comprising water, the method comprising:

• during a routine operation, directing the multiphase fluid through the PPM analyzer, wherein the analyzer includes a mesh comprising first adsorbent materials that adsorb specific substances from the multiphase fluid;
• during a validation operation, diverting the multiphase fluid through a molecular sieve prior to entering the PPM analyzer, the molecular sieve comprising a second adsorbent material that adsorbs the water from the multiphase fluid;
• measuring the mass of multiphase fluid passing through the PPM analyzer during the validation operation;
• and
• determining a zero reference point in an output of the analyzer, the zero reference point indicating that during the validation operation, the multiphase fluid from the molecular sieve dryer has removed substantially all of the water associated with the first adsorbent materials in the mesh.