It was a cold December evening at the site in Moose Jaw, Saskatchewan, where the young Technician Rob was just getting settled for his night shift. Being one of the newbies, he was assigned many of the graveyard shifts of watching the monitors, that displayed gas flows going into and out of the site.

He had completed a handful of these before, often with someone more senior by his side. The company had been cutting some costs and felt he could handle the cumbersome task on his own. It was boring but someone had to do it. The hardest part was staying awake and alert, even with a cup of Joe! He decided to blast some obtrusive heavy metal music to help keep him going, there was no one to complain about his song choice after all.

Halfway through his shift, he got up to stretch his limbs when above his music he suddenly heard the high-pitched “Beep-beep-beep” of the alarms sounding; alerting him that there could be a potential issue and he quickly ran back to the monitors. The gas pressure was approaching a dangerously low level. This is not good thought Rob, it was the dead of winter if the levels continue to fall the city and surrounding areas could run out of gas which could cause immense dangers and expense.

He quickly called his boss Daryl, who instructed him to stay calm and to call the SCADA desk. It turned out the issue was a nearby customer had recently changed their operations and was using a much higher volume of gas than usual, causing the surrounding businesses to be left with a lower supply pressure. They soon adjusted the supply to the area and the pressure issue was solved quite quickly.

“A situation like this is exactly why we have a Mini-Max Rotary Corrector on our site,” Daryl explained to Rob in more detail the next day. “This device accurately displays live temperature and pressure; the alarm capability that you experienced can be life-saving. It’s possible that if we weren’t notified of these changing levels in real time, something detrimental could have happened. Back in my days, we relied solely on using a pressure factor to gauge the volumes which aren’t nearly as accurate for an operation of our size”. Wow thought Rob to himself he had no idea how important this gadget was for safety.

Background Knowledge

Honeywell (this segment formerly known as Mercury Instruments)- a household name, that people recognize by two words “quality and reliability” in the natural gas industry.

Rotary Meters– a positive displacement meter often used in higher volumes or higher pressure applications. The gas or fluid flow is divided by a rotating impeller/rotor, has vanes and each rotation determines the flow rate.

Volume Correction– is necessary due to our ever-increasing use of natural gas and the need to accurately measure our usage. Volume correctors adjust gas pressure and gas temperature to a degree.

Mini-Max Rotary Corrector– is an electronic gas volume corrector, specially designed to accommodate direct mounting to rotary meters. Some specific examples of compatible meters are Dresser, Romet, and Elster.

What Makes a Mini-Max Rotary Corrector Unique?

  • It improves the value of your rotary meter operations with electronic precision and reliability.
  • The alternative, PFM (pressure factor measurement) is not nearly as accurate, pressure, and temperature are assumed to be constant.
  • It contains Audit Trail Memory of 41 days of daily, 41 days of hourly (AT) or 400 days of hourly (ATX) corrected and uncorrected volume, average pressure and temperature.
  • Provides higher accuracy, constant measuring, and alarm capability (to inform users of potential dangers).
  • REI- Redundant Electronic Index– for uncorrected volume backup.
  • The composite case that resists rust and won’t require paint.
  • All electronic- has no moving parts.
  • 12-year seal period.
  • 4-year warranty.

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