Page 2 - Manual Print History
Manual: 151-082010 300-302 Series Page 2 of 31 Manual Print History The print history shown below lists the printing dates of all revisions and addenda created for this manual. The revision level letter increases alphabetically as the manual undergoes subsequent updates. Addenda, which are released ...
Page 3 - Table of Contents
Manual: 151-082010 300-302 Series Page 3 of 31 Table of Contents 1. GENERAL INFORMATION ............................................................................................................................................ 4 1.1. F EATURES .........................................................
Page 4 - General Information
Manual: 151-082010 300-302 Series Page 4 of 31 1. General Information The Teledyne Hastings HFM-300 is used to measure mass flow rates in gases. In addition to flow rate measurement, the HFC-302 includes a proportional valve to accurately control gas flow. The Hastings mass flow meter (HFM-300) and ...
Page 5 - Optional 4-20 mA Current Output
Manual: 151-082010 300-302 Series Page 5 of 31 1.2. Specifications Accuracy .................................................................................... < ±0.75% full scale (F.S.) at 3 σ (±1.0% F.S. for >10 slm versions) Repeatability ......................................................
Page 6 - Other Accessories; Cables
Manual: 151-082010 300-302 Series Page 6 of 31 The 4-20 mA I/O option can accept a current input. The 0-5 VDC command signal on pin 14 can be replaced by a 4-20mA command signal. The loop presets an impedance of 75 ohms and is returned to the power supply through the valve common. 1.4. Other Accesso...
Page 7 - Installation and Operation; Insure flow circuit mechanical connections are leak free
Manual: 151-082010 300-302 Series Page 7 of 31 2. Installation and Operation This section contains the steps necessary to assist in getting a new flow meter/controller into operation as quickly and easily as possible. Please read the following thoroughly before attempting to install the instrument. ...
Page 9 - Conditions
Manual: 151-082010 300-302 Series Page 9 of 31 Figures 2.1/2.2, and Tables 2.1/2.2, show the 300/302 pin out. Pin # Pin # 1 Signal Common 1 Do not use 2 Do not use 2 Do not use 3 Do not use 3 Do not use 4 +15 VDC 4 Do not use 5 5 Signal Common 6 Output 0-5 VDC (4-20mA) 6 Output 0-5 VDC (4-20mA) 7 Si...
Page 10 - Check
Manual: 151-082010 300-302 Series Page 10 of 31 Span Error vs Pressure (0.026" Sensor Tube) y = 9.8877E-11x 3 3.4154E-07x - 2 8.3288E-05x + -20.0% -18.0% -16.0% -14.0% -12.0% -10.0% -8.0% -6.0% -4.0% -2.0% 0.0% 2.0% 0 100 200 300 400 500 600 700 800 900 1000 Pressure(psig) Span E rror ( % readin...
Page 11 - Error
Manual: 151-082010 300-302 Series Page 11 of 31 Span Error Vs. Pressure 0.017" Sensor -2% -1% 0% 1% 2% 3% 4% 5% 0 100 200 300 400 500 600 700 800 900 1000 Pressure (psig) Spa n Err o r ( % r e adi ng) Mean Max Min If the system pressure is higher than 250 psig (1.7 MPa) the pressure induced erro...
Page 12 - Controlling Other Process Variables
Manual: 151-082010 300-302 Series Page 12 of 31 The first method requires that the two controllers use the same signal range (0 to 5 VDC or 4 to 20 mA) and that they be sized and calibrated to provide the correct ratio of gasses. Then, by routing the actual flow Output signal from the primary meter/...
Page 15 - Theory of Operation; dT
Manual: 151-082010 300-302 Series Page 15 of 31 3. Theory of Operation This section contains an overall functional description of the Hastings 300 series of flow instruments. In this section and other sections throughout this manual, it is assumed that the customer is using a Hastings power supply. ...
Page 18 - ΔΡ; LQ
Manual: 151-082010 300-302 Series Page 18 of 31 the shunt. Most instruments employ Poiseuille’s law and use some sort of multi-passage device that creates laminar flow between the upstream sensor inlet and the downstream outlet. This makes the volumetric flow versus pressure drop curve primarily lin...
Page 19 - πμ; Re; πτ; QL
Manual: 151-082010 300-302 Series Page 19 of 31 πμ ρ 5 Q L e = For a typical flow divider tube the entry length is approximately 0.16 cm. From this it can be seen that if the sensor inlet pickup point is inside of the flow divider tube but downstream of the entrance length and if the sensor outlet p...
Page 20 - πτμ
Manual: 151-082010 300-302 Series Page 20 of 31 0 0.02 0.04 0.06 0.08 0.1 0.12 0.14 0.16 0.18 0 5 10 15 20 25 30 35 Flow (liter/min) P a ss a g e T h ic k n ess ( c m ) Fig. 3.5 Thickness of the annular ring as a function of flow rate for a sensor with a 75 Pa drop and a 2 cm spacing. Each shunt mus...
Page 23 - Procedure
Manual: 151-082010 300-302 Series Page 23 of 31 Action: Shut off all flow. For the standard 0-5VDC output, adjust the zero potentiometer located on the upper right inlet side of the flow meter until the meter indicates zero. For the optional 4-20 mA output, adjust the zero potentiometer so that the ...
Page 25 - Gas Conversion Factors; GCF; Methods Used to Determine Gas Conversion Factors
Manual: 151-082010 300-302 Series Page 25 of 31 5. Gas Conversion Factors Gas conversion factors (GCF’s) for gasses metered using Hastings Instruments products, can be found by visiting the Hastings Instruments web site. The web address can be found at the end of this document. The gas conversion fa...
Page 27 - Volumetric Vs Mass Flow; Liter
Manual: 151-082010 300-302 Series Page 27 of 31 6. Volumetric Vs Mass Flow Mass flow measures just what it says, the mass or number of molecules of the gas flowing through the instrument. Mass flow (or weight per unit time) units are given in pounds per hour (lb/hour), kilograms per sec (kg/sec) etc...
Page 28 - Drawings and References
Manual: 151-082010 300-302 Series Page 28 of 31 7. Drawings and References HFM-300 / HFC-302 Outline Drawing (All dim. Are approximate)
Page 31 - TOLL FREE
Manual: 151-082010 300-302 Series Page 31 of 31 8. WARRANTY 8.1. Warranty Repair Policy Hastings Instruments warrants this product for a period of one year from the date of shipment to be free from defects in material and workmanship. This warranty does not apply to defects or failures resulting fro...
