The typical application for bump testing or calibrating your instrument using an NRC regulator requires a fixed flow 0.5 litre/min regulator, a bit of tubing; a calibration cup; your gas mixture; and you are good to go.
There is nothing wrong with that, provided you are using the correct flow rate, regulator material and tubing. If your instrument has an internal pump, then you should be using the On-Demand Flow Regulator.
There are several regulators which can be used with NRC gas mixtures. Here are a few ideas for making your bump test or calibration system more efficient and functional.
When producing a specialty gas mixture, most of the time taken to manufacture it goes into cylinder preparation to ensure that the mixture is stable. This is the single most important aspect in a quality gas mixture. If what comes out of the cylinder is not what is described on the label it will result in a poor calibration. Much time, testing, and research is invested in the development of techniques related to the interaction with cylinders and valves, solely to ensure the stability of mixtures. In general, it includes:
Gold mines worldwide use cyanide to extract gold from ore. As environmental standards have increased in most mining areas around the world, cyanidation plant tailings must be treated to remove the cyanide and various cyanide compounds, including hydrogen cyanide (HCN), before they are discharged into a tailing storage facility. Methods to remove the cyanide and destroy it have increased in cost to the point where processes to recover the cyanide for reuse have become more cost effective than purchasing new cyanide.
Ozone can be used for the treatment of water in multiple industries including municipal water treatment; wastewater; bottled water, wineries and breweries; aquaculture; drinking water for livestock; hydroponics; water treatment in cooling towers and air washers; public swimming pools; aquariums and zoos; commercial laundry facilities; soil/groundwater remediation and more.
Ozone is typically generated using the electrical discharge method where oxygen is exposed to high voltage resulting in oxygen molecules colliding with O2 to create the unstable O3 molecules.
Ozone is 13 times more soluble than oxygen. This solubility makes ozone very useful in many water treatment applications. Ozone can be dissolved in water much easier than oxygen although it does still require mechanical mixing.
Ozone is one of the most effective oxidants on earth, making it better than most chemical alternatives at breaking down contaminates and killing bacteria.
Nitrogen dioxide (NO2) is one of a group of highly reactive gases known as oxides of nitrogen or nitrogen oxides (NOx). Other nitrogen oxides include nitrous acid and nitric acid. NO2 is used as the indicator for the larger group of nitrogen oxides.
Why should I "waste" gas on bump testing my gas detection instrument when it worked the last time I used it?
Why should I have a safety switch in my house?
Why should I put on my seat belt (or buckle up) in the car?
Why should I wear a life jacket?
The answer is:
‘Because it could save your life!’
Westfalen/Heublein provide specialty gas mixtures for the calibration of Continuous Emission Monitoring Systems for marine shipping industry.