One For All HFC-302 Manual do Utilizador Página 1

INSTRUCTION MANUAL HFM-300 FLOW METER, HFC-302 FLOW CONTROLLER TELEDYNE HASTINGS INSTRUMENTS

300-302 Series Page 10 of 31 Span Error vs Pressure(0.026" Sensor Tube)y = 9.8877E-11x33.4154E-07x - 28.3288E-05x + -20.0%-18.0%-16.0%-14.0%-1

300-302 Series Page 11 of 31 Span Error Vs. Pressure0.017" Sensor-2%-1%0%1%2%3%4%5%0 100 200 300 400 500 600 700 800 900 1000Pressure (psig)Sp

300-302 Series Page 12 of 31 External Input pin (See Tables 2.1 & 2.2), the ratio of flows can be maintained over the entire range of gas flows

300-302 Series Page 13 of 31 On the controller card there is a jumper that sets whether the control loop controls mass flow or an external process

300-302 Series Page 14 of 31 Fig. 2.8 2.12. Temperature Coefficients As the ambient temperature of the instrument changes from the original calibr

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 ins

300-302 Series Page 16 of 31 can be dissipated by radiation, conduction, or convection. The radiation term is negligible due to the low temperature

300-302 Series Page 17 of 31 heater to the gas stream will force the upstream bridge control loop to apply more power to the upstream heater so tha

300-302 Series Page 18 of 31 desired to ensure a stable instrument, there must be some matching between the linear volumetric flow versus pressure

300-302 Series Page 19 of 31 πμρ5QLe= For a typical flow divider tube the entry length is approximately 0.16 cm. From t

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 th

300-302 Series Page 20 of 31 00.020.040.060.080.10.120.140.160.180 5 10 15 20 25 30 35Flow (liter/min)Passage Thickness (cm)Fig. 3.5 Thickness of t

300-302 Series Page 21 of 31 3.7. Control Valve The control valve is an “automatic metering solenoid” valve (see Figure 3.7). While most solenoi

300-302 Series Page 22 of 31 This section contains service and calibration information. Some portions of the instrument are delicate. Use extrem

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 r

300-302 Series Page 24 of 31 reverse order of disassembly. A new nickel gasket will be required. Secure the endcap with 65 in lb. (7.3 N m) to 85

300-302 Series Page 25 of 31 5. Gas Conversion Factors Gas conversion factors (GCF’s) for gasses metered using Hastings Instruments products, can

300-302 Series Page 26 of 31 being used to measure the flow of propane. The reading from the meter is multiplied by the GCF for propane divided by

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 t

300-302 Series Page 28 of 31 7. Drawings and References HFM-300 / HFC-302 Outline Drawing (All dim. Are approximate)

300-302 Series Page 29 of 31 TRANSDUCER ENDCAP ENDCAP SHUNT HFM-300 Sectional View Sensor and Main PC Board

300-302 Series Page 3 of 31 Table of Contents 1. GENERAL INFORMATION...

300-302 Series Page 30 of 31 SHUNT ENDCAP ENDCAPVALVE ASSEMBLY CONTROLLER CARD TRANSDUCER HFC-302 Sectional View

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

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 f

300-302 Series Page 5 of 31 1.2. Specifications Accuracy ... <

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 co

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/control

300-302 Series Page 8 of 31 2.4. Mechanical Connections 2.4.1. Filtering The smallest of the internal passageways in the Hastings 300 is the diame

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 use2 D