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201/203/205/207 Series Flowmeters and Controllers Instruction Manual
1. General Information
The Hastings 200 series mass flow meters (HFM-201/HFM-205) and controllers (HFC-203/HFC-207) are designed
to accurately measure and control mass flow over the range of 30 slm to 2500 slm without corrections or
compensations for gas pressure and temperature with an accuracy of better than ±1% from the mean (±2% FS
for 201/203 units in the ½" fitting size base with flows >500 slm). 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/3.45 MPa) or overflows. Instruments are normally calibrated
with the appropriate standard calibration gas (nitrogen) and a correction factor is used to adjust the output for
the intended gas. Special calibrations for other gases, such as oxygen, helium, and argon, are available upon
special order.
NOTICE: The instruments described in this manual may be available with multiple pinouts.
Ensure that all electrical connections are correct.
NOTICE: The instruments described in this manual are designed for INDOOR and DRY use only.
NOTICE: The instruments described in this manual are designed for Class 2 installations in
accordance with IPC standards.
CAUTION: There are no operator serviceable parts or adjustments inside the product.
CAUTION: If this equipment is used in a manner other than that specified, the protection
provided by the equipment may be impaired.
EAR99 Technology Subject to Restrictions Contained on the Cover Page
Page 5 of 28
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