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STP/NTP Tutorial: Alicat Laminar DP Mass Flow Instruments
Standardized flow references define the temperature and pressure conditions used to calculate flow readings. This allows flows measured under different conditions to be expressed according to a common standard, keeping readings accurate and comparable.
Unless otherwise requested, your mass flow instrument will ship with a default STP of 25°C and 1 atm, and an NTP of 0°C and 1 atm. Changing the standardized conditions (STP/NTP) is easy to do yourself. The tutorial below explains how to configure STP/NTP settings for your Alicat laminar DP mass flow meter or controller through the display. To configure STP/NPT through serial commands, please refer to the standard manual.
Please refer to the CODA manual and BASIS manual for STP options on other Alicat mass flow instruments.
9v and 10v firmware
Select: MENU > SETUP > Sensor > STP Flow Ref or NTP Flow Ref
Reference options:
- Stan T: Standard Temperature
- Stan P: Standard Pressure
- Norm T: Normal Temperature
- Norm P: Normal Pressure
- Ref temp units changes the temperature units used for STP and NTP calculations.
- Ref pressure units changes the pressure units used for STP and NTP calculations