Instruction/ maintenance manual of the product HFC-302 Teledyne
Go to page of 31
INSTRUCTION MANUAL HFM-300 FLOW METER, HFC-302 FLOW CONTROLLER TELEDYNE HASTINGS INSTRUMENTS ISO 9001 CER TIFIED.
Manual: 151-082010 300-302 Series Page 2 of 31 Manual Print History The print history shown below lists the printing da tes of all revisions and addenda created for this manual. The revision level letter increases alph abetically as the manua l undergoes subsequent updates.
Manual: 151-082010 300-302 Series Page 3 of 31 Table of Contents 1. GENERAL INFO RMATIO N ............................................................................................................................................ 4 1.1. F EATURES ...
Manual: 151-082010 300-302 Series Page 4 of 31 1. General Information The Teledyne Hastings HFM-300 is used to measure mass flow rat es in gases. In addition to flow rate measurement, the HFC-302 include s a proportional valve to accu rately control gas flow.
Manual: 151-082010 300-302 Series Page 5 of 31 1.2. Specifications Accuracy .................................................................................... < ±0.75% full sca le (F.S.) at 3 σ (±1.0% F.S. for >10 slm versions) Repeatability .
Manual: 151-082010 300-302 Series Page 6 of 31 The 4-20 mA I/O option ca n accept a current input. The 0-5 VDC command sign al on pin 14 can be replaced by a 4-20mA command signal. The loop pres ets an impedance of 75 ohms and is returned to the power supply through the valve common.
Manual: 151-082010 300-302 Series Page 7 of 31 2. Inst allation and Operation This section contain s the steps necessary to ass i st in getting a new flow meter/controller into operation as quickly and e asily as possible. Please read the following thoroughly before attempting to install the instrument.
Manual: 151-082010 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 diameter of the sensor tube, which is 0.026”(0.66 mm), and the annular clearance for th e 500 sccm shunt which is 0.
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 Com m on 1 Do not us e 2 Do not use 2 Do not us e 3 Do not use 3 Do n.
Manual: 151-082010 300-302 Series Page 10 of 31 Span Error vs Pressure (0.026" Sensor T ube) 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 Error (% reading) Mean error max min 2.
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) Span Error (% reading) Mean Max Min If the system pressure is higher than 250 psig (1.
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.
Manual: 151-082010 300-302 Series Page 13 of 31 variable directly. This analog output signal could b e 0-5 volts, 0-10 volts (or 4-20 ma for units with 4- 20 ma boards) or any value in between. On the controller card there is a jumper that sets whether the control loop controls mass flow or an external process variable.
Manual: 151-082010 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 calibration temperature, errors will be introduced into the output of the instrument. The Temperature Coefficient of Zero describes the change in the output that is seen at zero flow.
Manual: 151-082010 300-302 Series Page 15 of 31 3. Theory of Operation This section contains an o verall functional descript ion of the Hastings 300 ser ies of flow instruments. In this section and other sections throughout this manual, it is assumed that the custo mer is using a Hastings power supply.
Manual: 151-082010 300-302 Series Page 16 of 31 low temperatures used by the sensor, and because th e sensor construction preferentially favors the conductive and convective heat tr ansfer modes.
Manual: 151-082010 300-302 Series Page 17 of 31 The gas stream w ill increase in tempe rature due to the heat it gain s from the upstre am heater. This elevated gas stream temperature causes the heat tran sfer at the downstream heater t o gain heat from the gas stream.
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 upstre am sensor inlet and the downstream outlet.
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 approx imately 0.16 cm. From this it c an be seen that if the sensor inlet pickup .
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 ) Passag e T hickness ( cm) Fi g . 3.5 Thickness of the annular ring as a function of flow rate for a sensor with a 75 Pa drop and a 2 c m spacing.
Manual: 151-082010 300-302 Series Page 21 of 31 3.7. Control Valve The control valve is an “automatic metering solenoid” valve (see Figu re 3.7). While most solenoid valves operate in either the fully open or closed positions, the automatic me tering solenoid valve is designed to control flow.
Manual: 151-082010 300-302 Series Page 22 of 31 This section contains ser vice and calibration info rmation. Some porti ons of the instrument are delicate. Use extreme care when servicin g the instrument. Authorized Maintenance With proper care in installation and use, the inst rument will require little or no maintenance.
Manual: 151-082010 300-302 Series Page 23 of 31 Action: Shut off all flow. For the standard 0-5VDC output, adjust the zero potent iometer located on the upper right inlet side of the flow met er until the meter indicates zero. For the optional 4-20 mA output, adjust the zero potentiometer so that the meter indicates slightly more than 4 mA, i.
Manual: 151-082010 300-302 Series Page 24 of 31 reverse order of disa ssembly. A new nickel gasket will be required . Secure the endcap with 65 in lb. (7.3 N m) to 85 in lb (9.6 N m) of torqu e on ea ch stainless steel socket head cap screw. Use of a fastener other than the one mentioned here may result in leakage at the seal.
Manual: 151-082010 300-302 Series Page 25 of 31 5. Gas Conversion Factors Gas conversion factors (GCF’s) for gasses metered us ing Hastings Instruments products, can be found by visiting the Hastings Instruments web site. The web a ddress can be found at the end of this document.
Manual: 151-082010 300-302 Series Page 26 of 31 being used to measure the flow of propane. The readin g from the meter is multiplied by the GCF for propane divided by the GCF of air.
Manual: 151-082010 300-302 Series Page 27 of 31 6. V olumetric Vs Mass Flow Mass flow measures just w hat it says, the mass or number of mol ecules of the gas flowing through the instrument. Mass flow (or weight per u nit time) uni ts are given in pounds per hour (lb/hour), kilograms per sec (kg/sec) etc.
Manual: 151-082010 300-302 Series Page 28 of 31 7. Drawings and References HFM-300 / HFC-302 Outline Drawing (All dim. Are approximate).
Manual: 151-082010 300-302 Series Page 29 of 31 TRANSDUCER ENDCAP ENDCAP SHUNT HFM-300 Sectional View Sensor and Main PC Board.
Manual: 151-082010 300-302 Series Page 30 of 31 SHUNT ENDCAP ENDCAP VALVE ASSEMBLY CONTROLLER CARD TRANSDUCER HFC-302 Sectional View.
Manual: 151-082010 300-302 Series Page 31 of 31 8. W ARRANTY 8.1. Warranty Repair Policy Hastings Instruments wa rrants this product for a period of one year from the date of shipment to be free from defects in mater ial and workmanship.
An important point after buying a device Teledyne HFC-302 (or even before the purchase) is to read its user manual. We should do this for several simple reasons:
If you have not bought Teledyne HFC-302 yet, this is a good time to familiarize yourself with the basic data on the product. First of all view first pages of the manual, you can find above. You should find there the most important technical data Teledyne HFC-302 - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, Teledyne HFC-302 you will learn all the available features of the product, as well as information on its operation. The information that you get Teledyne HFC-302 will certainly help you make a decision on the purchase.
If you already are a holder of Teledyne HFC-302, but have not read the manual yet, you should do it for the reasons described above. You will learn then if you properly used the available features, and whether you have not made any mistakes, which can shorten the lifetime Teledyne HFC-302.
However, one of the most important roles played by the user manual is to help in solving problems with Teledyne HFC-302. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device Teledyne HFC-302 along with tips on how to solve them. Even if you fail to solve the problem, the manual will show you a further procedure – contact to the customer service center or the nearest service center
