July 31, 2024
Short Instructions for Reading Twin-Tube Piezometer
- Before leaving office, check that the indicator has enough gas.
- At the site, turn flow control valve to Vent and zero the pressure gauge.
- Turn flow control valve Off.
- Wipe off all dirt and moisture from the transducer tubing and connectors.
- Connect the quick connect plug to Transducer socket and vent tube to the return flow indicator.
- Turn tank control valve On, then turn the regulator knob clockwise until pressure reaches the rating of the gauge. 7. Turn flow control valve On.
- Adjust the flow rate knob so that the pressure reading on the main gauge rises at about 1 PSI per second.
- Wait until ball in return flow indicator shows a return flow of gas from the transducer, then turn flow control valve Off.
- Wait until pressure reading stabilizes, then tap gauge and write down reading.
- To verify, briefly turn flow control valve to Vent, then return to On. This changes the pressure reading. Now take a second, verification reading.