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301/303/305/306/307 Flowmeters and Controllers Instruction Manual
Specifications
WARNING: Do not operate instruments exceeding the specifications listed below. Failure to
heed this warning could result in serious personal injury and/or damage to the equipment.
Accuracy:
Repeatability:
Standard Pressure Rating:
Pressure Coefficient:
Operating Temperature:
Temperature Coefficient (zero):
Temperature Coefficient (span):
WARNING: Operation above 60 °C ambient may result in case temperatures capable of causing
burns.
Leak Integrity:
Flow Ranges:
Standard Output:
Optional Output:
Power Requirements:
NOTICE: Use of an underpowered or under-voltage supply could result in equipment damage.
WARNING: Do not power with isolated drive circuits that are more than 36 volts above ground
potential or could reach 36 volts in the event of a fault. Failure to heed this warning could
result in serious personal injury and/or damage to the equipment.
Wetted Materials:
Attitude Sensitivity of zero:
EAR99 Technology Subject to Restrictions Contained on the Cover Page
HFM-301/305 & HFC-303/307: ±1% FS (±2% FS for HFM-306)
±0.2% FS
HFM-301, HFC-303: 500 psig [3.45 MPa]
with High Pressure Option of 1000 psig [6.89 MPa]
HFM-305, HFC-307: 500 psig [3.45 MPa]
HFM-306: 300 psig [2.07 MPa]
<0.016% of reading/psi (N2)
See pressure section for more information
-20 - 70°C in non-condensing environment
Maximum ±0.12% FS/°C (-20-70°C)
Maximum ±0.08% Reading/°C (-20-70°C)
< 1x10
-9
sccs
25 to 10,000 slm (N2 Equivalent)
0-5 VDC (load min 2k Ω)
4-20 mA (see load requirements in section 1.3)
±14-16 VDC @ 70 mA (meters absolute max)
±14-16 VDC @ 185 mA (controllers absolute max)
Class 2 power 150VA max fused
Stainless Steel, Nickel, Viton,
Kalrez ® (Controller only)
<±1.4% FS for 90° without re-zeroing
(N2 @ 50 psig [446 KPa])
Page 7 of 32
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