168-082010_ 210-212 Meter/Controller Page 4 of 17
1. General Information
The Hastings HFM-210 mass Flowmeter and HFC-212 flow controller are designed to accurately measure
and control mass flow over the range of 10 sccm to 30 slm, without corrections or compensations for gas
pressure and temperature with an accuracy of better than ±1% FS. Hastings mass flow instruments do not
require any periodic maintenance under normal operating conditions with clean gases. No damage will occur
from the use of moderate overpressures (~500 psi/3.45MPa) or overflows. Instruments are normally
calibrated with the appropriate standard calibration gas (nitrogen) then a correction factor is used to adjust the
output for the intended gas.
1.1. Features
• LINEAR BY DESIGN. The HFM-210/HFC-212 series is inherently linear (no linearization circuitry is
employed). Should recalibration in the field be desired (a calibration standard is required), the customer
needs to simply set the zero and span points. There will be no appreciable linearity change of the instrument
when the flowing gas is changed.
• MODULAR SENSOR. The HFM-210/HFC-212 series incorporates a removable/replaceable sensor module.
Field repairs to units can be achieved with a minimum of production line downtime.
• METER SETTLING TIME. Changes in flow rate for the HFM-210 are detected in less than 2 seconds when
using the fast-response circuitry.
• LOW TEMPERATURE DRIFT. The temperature coefficient of span for the HFM-210/HFC-212 series is
typically less than 0.08% of full scale/°C from 15-45°C. The temperature coefficient of zero is typically less
than 0.15 % of reading/°C from 0-50°C.
• CURRENT LOOP. The 4-20 mA option gives the user the advantages of a current loop output to minimize
environmental noise pickup.
