Respondidos G’day from an oil and gas automation engineer

Hello from another field person. Watch for condensation in shelters like that, it settles on bare breakout boards overnight when the temperature drops. Conformal…

hace 3 meses

Respondidos Mi jefe no deja de decir "Industria 4.0" sobre nuestros sensores de la finca. ¿Eso es lo que estamos construyendo en Hermetry?

Short version from someone who has sat through too many of those slides: IoT is the plumbing (things with sensors that talk to a…

hace 5 meses

Respondidos Measuring a 12 V battery without the divider draining it, and a low-battery alarm that flaps in the sun

Built the P+N version on one station to test: battery current in sleep dropped by about 0.1 mA, and the reading is the same…

hace 5 meses, 3 semanas

Respondidos Measuring a 12 V battery without the divider draining it, and a low-battery alarm that flaps in the sun

100k top, 22k bottom. At 12.6 V I get about 2.27 V on the pin, raw around 2700.

hace 5 meses, 4 semanas

Iniciados Measuring a 12 V battery without the divider draining it, and a low-battery alarm that flaps in the sun

Two connected problems on our soil moisture stations (farm, 9 stations, each with a 12 V 7 Ah lead-acid battery and a 10 W…

hace 6 meses

Respondidos RS-485 cable shield: earth, 0 V of the supply, or both ends?

Do you also have a separate 0 V / common wire between the meters and the gateway, or just A and B?

hace 8 meses

Respondidos Drawing our compressed air system: where the check valve goes and how to show it

Careful there: when compressor 2 is off, the receiver pressure pushes back into its discharge line. Most screw compressors do have a minimum pressure/check…

hace 8 meses

Respondidos Choosing a positive-displacement pump that can sit in a slurry pit, and drawing it on the process screen

We went with an AODD pump in the pit, stainless with flap valves, and a dampener on the line. The separator is happy. On…

hace 8 meses, 3 semanas