Teledyne 200 Automobile Parts User Manual
Contents
1. 5 1 2 CA ONE 5 1 3 Arena einer 6 1 3 1 arena 6 ES NNMERO 6 123 2 Tolle o 6 1 3 4 4 20 MA CINE We 6 SECTION 2 0 INSTALLATION AND OPERATION 2 rennen I nnn nennen 7 2 1 RECEIVING INSPECCI N DE uae 7 2 2 Power Reguiremen tS ida 7 2 3 O agb dendi eee ga ve I DNO PE haasi asap aqasha NEE m asa 7 2 4 Mechanical Connections EET 7 2 5 nein 8 200 BORO au uum a masm costes 8 2 6 1 Power Supply Operation anna 8 2 6 2 2 een 8 2 8 3 2500 211 san ica rn han 8 2 7 Range CAU 8 SECTION 3 0 THEORY OF CPERAIION a nica ci n 9 3 1 Overall Functional Describa 9 3 2 SENSO usss OER 9 3 3 aio tuia tx C n t 10 etos iB A au 10 SECTION4 0 MAINTENANCE a u LL daa 13 4 1 A ee 13 4 7 Authorized M aintenareb u a anne 13 4 3 AdjJ stimentsu unuq a etum 13 4 3 1 ee 13 4 3 2 ResponseT ime A djustments anne 13 4 3 3 M 18081 01555 l ee 13 44 End Cap u u a u2. 14 58 48 45 18 110 au 14 126B PAGE 3 4 6 Printed Circuit Board R eplacement nn na 15 4 7 Sensor en Rama ERUIT 15 430 18010 82225 ea 15 SECTION5 0 REPLACEMENT PARIS I ibat cai 17 SECTION6 0 WARRANTY AND REPARR I a 19 SECTION 7 0 DIAGRAMS AND DRAWMGS I I I I nennen nnne tennis tenen 21 AssemblyD iagram P C 810F astR eponse iaa 22 Schematic Fast RESPONSE na 23 HFM 200 OutlineDrawng e pu Haga et P cba n 24 HFM 201 Outline Drawing scott 25 HFM 200B Outline D rawing re dida 26 Laminar Flow Element Outline Drawing aaa a 27 126B PAGE 4 LO GENERAL INFORMATION Hastings M ass lowmeters are designed to accurately measure mass flow without corrections or compensations for gas pressure and temperature D ueto a linear electrical output signal theflowmeters are ideal for use with totalizers and recorders astings M ass Flowmeters do not require any periodic maintenance under normal operating conditions with clean gases N o damage will occur from the use of moderate overpressures or overflows he standard flowmeter calibration is for air Special calibrations for most other gases such as oxygen nitrogen hydrogen and carbon monoxide are available on special order or by useof a gas multiplier T heseinstruments are calibrated with air at the factory
3. TELEDYNE HASTINGS INSTRUMENTS HASTINGS 200 SERIES FAST RESPONSE MASS FLOWMETERS MAW TELEDYNE INSTRUMENTS 5 ISO 9001 N 4 u a 10192 01 eledyne Technolog y theD r pr fen RvA n Accredited by the Registrar Accreditation Board RAB Manual Print History T heprint history shown below liststhe printing dates of all revisions and addenda created for this manual T herevision level letter increases alphabetically as the manual undergoes subsequent updates A ddenda which are released between revisions contain important change information that the user should incorporate immediately into the manual Addenda are numbered sequentially When anew revision is created all addenda associated with the previousrevision of the manual incorporated into the new revision of the manual E ach new revision includes a revised copy of this print history page Revision Document umber 126 082000 August 2000 Revision C Document umber 126 082005 August 2005 Visit www teledyne hi com for WEEE disposal guidance Hastings Instruments reserves the right to change or modify the design of its equipment without any obligation to provide notification of change or intent to change TABLE OF CONTENTS SECTION 1 0 GENERAL INFORMAIION nca tata I tri enata uua uaa 5 LAF eatu Rc
4. Flowmeters D etailed schematics and parts lists can befound at the end of the manual in Section 6 0 Inthissection and other sections throughout this manual when a power supply is mentioned itis assumed that the customer has a Hastings Power Supply T hesesections are not applicable if another type of power supply is used 3 1 Overall Functional Description TheHFM Flowmeter consists of a sensor electronic circuitry and a shunt T he sensor measures the flow rate from 0 to 10 sccm of the gas to be metered T he shunt divides the flow such that the flow through the sensor is a precise percentage of theflow through the shunt T heflow through the sensor and the shunt is always laminar T hecircuit board amplifies the sensor output 5 00VD C and sends it to the power supply to display All of these components working together result a fast stable flowmeter 3 2 Sensor Fig 3 1 T heHastings M odel HFM M assFlowmeter operates on a unique thermal electric principle whereby a metallic capillary tube is heated uniformly by a resistance winding attached to the mid point of thecapillary seeFigure3 1 T hermocouplesT C 1andT C 2 are welded at equal distances from the mid point and develop equal outputs at zero flow W hen flow occurs through the tubing heat is transferred from the tube to the gas on the inlet side and from thegas backto thetubeon the outlet side creating an asymmetrical temperature distribution see Figure
5. anna en OOO P 1 hole 0 100 slptn aeter 10165 Les omis 0 300 SIpmwasher removed E RR RR 0 500 SIpm washer removed NOTE heseranges arefor Air at Standard Temperature and Pressure 126B PAGE 14 4 6 Printed Circuit Board Replacement In the unlikely event that the PC board fails it is easily removed from the instru ment and replaced with a spare to minimize instrument downtime R eplacement of the PC board will require the instrument to be recalibrated per Section 4 3 1 U nplug the power cable from thetop of the transducer Remove two screws on the side of the cover L ift off the cover and unplug the four wire sensor plug noting the orientation prior to removal R emovethe screw that holds the PC board to the sensor T rouble shoot or replace as applicable Installation is the reverse of the above procedure R ecalibrate if any components were changed or if any potentiometers were adjusted 4 7 Sensor Replacement If the sensor fails or becomes plugged it can be removed Removethe cover and the PC board per Section 4 6 above R emovethethree bolts holding the sensor to the instrument base R emovethe sensor from the base noting the two O rings Parker 2 005 V 884 75 between t
6. sent to theterminals on the back and to the decoding circuitry in the display which converts itto a 3 1 2 digit output heFast Response odel uses additional electronics to achieve fast response characteristics by amplifying the rate of change of the input signal and adding it to the amplified input signal T he elec tronics are adjusted to provide responsetimes of less than two seconds to 9896 of a 0 10096 step change with less than 296 overshoot T he electronics also maintain the ouput signal above 5 00V D C when the flowrate exceeds the full scaleflow of the flowmeter NOTE T he output signal will continueto increase above5 00V DC astheflow rate exceeds full scale flow however the output above5 00V DC isnon linear and should not be used for flow measurement 3 4 Shunt Higher measurement of flow rates is achieved by dividing the flow with a fixed ratio shunting arrange ment asis illustrated in Figure 3 4 T hisis accomplished by placing the measuring capillary tube parallel with one or more dimensionally similarchannels called a laminar flow element L FE T herefore the sensor only needs to heat the gas passing through the capillary tube resulting in low power require ments whileretaining all the mass measuring characteristics TheHFM 229 hastwo possible shunts T helow range shunt consists of tubes inserted into a cylindrical base T his shunt is adjustable for ranges from 0 10 sccm to 0 250 sccm see Figure 3 5 T he high
7. 1 4 SO ONE TURN 10 OHM 5 8 50 SIDE ADJUST 118 20 046 01 110 1 11 04 06 11 02 0541 01 16 NOMENCLATURE DESCRIPTION REF DwG NO PARTS LIST PC 810Assembly Information from astingsdrawing 30837 rev 126B PAGE 22 1 191 21 Di an ASt ASI 004 FE 5 22 94 zum zn dO 3001 8S1 53007 dO 424810 BE wa sar 4 126B PAGE 23 Information from astingsdrawing 30837 rev PC 810Schematic TIYIS LON OG an MO p 00c W3H SNITLNO MIA 401108 S3 10H DNILNNOW AWO BNILS3L INVId ONV DAN ONV SNid H1ON S N SIN DIN AS 29 ASI S N alams Z 8 S310H NORROD 91 1fidino 21 S N 318V9 QN YOLIINNOO N34 JONVBVIND 1 NO3 9 N OL zi Nid Z setoo uvo wad 8 AA C ames man umm E 126 24 S OLEOF ASE A3u zns Leo vn oo n AIBL13I WA O 14 LOcC W3H WO1108 310H ONILNNOW AMINO 9NI1S31 DIN ONY SNid 3LON S N S N S N DIN 29 ASI S N 20 ASI V T
8. 3 2 T hethermocouples sensethis decrease and increasein the capillary tube temperature and producea millivolt output signal proportional to that change LENGTH OF TUBE Fig 3 2 126B PAGE 9 DC VOLTAGE SOURCE Fig 3 3 For aconstant power input the differential thermocouple output is a function of the mass flow rate and the heat capacity of the gas Sincethe heat capacity of many gases is relatively constant over wide ranges of temperature and pressure the flowmeter may be calibrated directly in mass units for those gases hangesin gas composition usually only require application of a simple multiplier to the air calibration to account for the difference in heat capacity and thusthe flowmeter is capable of measuring a wide variety of gases SENSOR TUBE FL 0W CP x u s PTT AEE FPP EE SHUNT4 EXZZZZZZZEEZZZZZIIILLLIIIT SPOS OL OD OEE OO Fig 3 4 3 3 Electronics T he Fast Response M odel H FM uses a thermal flow sensor to measure flow through a capillary tube which is a fixed percentage of thetotal flow through the instrument T his sensor develops an output signal proportional to flow which is approximately 0 8 mv full scale magnitude see Figure 3 3 T his signal is amplified by the meter circuitry until itis 0 5 00V D his 5 volt output is sent back to the power supply and to theflowmeter circuitry if applicable At the power supply the 5 volt output is
9. High Pressure O 1000 psig proof tested to 1500 psig 5 ne eet kuah E UP erc Y eot ts 0 500 psig 0 01 psi i us 10 sccs Temperature C oefficient 5 0 196 per C OP OW UE 15VDC 50mA Flow Signa casaca acacia 0 5 00VDC inherently linear Wetted Mali 316 55 Viton Seals old ickle B raze 9 ERE to 15 pin D connector 2 EittingsH EM 9229 nein to dida 1 4 Swagelok 230 1 2 Swagelok Weight approx H EM 9229 nico eret etre en te 1 8 105 HFM 230 3 3 lbs 126B PAGE 5 1 3 Accessories 1 3 1 Power Supplies astings Power Supplies are designed as combination power supplies and digital readout monitors T hey can simultaneously power a combination of different astings low Instruments T he front panel 9 47 H X 3 47 W allows mounting of two units in a standard 19 rack A terminal strip on the rear panel provides the user with continuous analog outputs from all channels All power supplies have 3 1 2LCD display M odels 200 and 400 Power Supplies can accommodate up to two or four H astings Flow Instruments respectively and the M odel 40 isfor use with flowmeters only powering up to 4 simultaneously T he M odel 40 also features user adjustable gas conversion factors for direct reading when changing gases For more information r
10. KIT FOR HFM 200 and 2008 91 14 KALREZ O RING KIT FOR 201 91 150 M NEOPRENE O RING KIT FOR HFM 200 and 200B 81 151 ines NEOPRENE O RING KIT FOR HFM 201 NOTE Ranges listed arefor same standard temperature and pressure To place an order or to obtain information concerning replacement parts contact the factory or our local manufacturer s representative in your area See below or this manual s last page for the address or phonenumber W hen ordering includethefollowing information nstrument model number Part description Hastings part number 126B PAGE 17 126B PAGE 18 6 0Warranty and Repair Warranty 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 T his warranty does not apply to defects or failures resulting from unauthorized modification misuse or mishandling of the product T his warranty does not apply to batteries or other expendable parts nor to damage caused by leaking batteries or any similar occurrence T his warranty does not apply to any instrument which has had atamper seal removed or broken T his warranty is in lieu of all other warranties expressed or implied including any implied warranty as to fitness for a particular use astings Instruments shall not be liable for any indirect or conse q
11. VNDIS 104100 NOWNOO SITOH ONILNNOW PA MINOS 318V9 91 anm HO123NNOO Wad uod 19 w r Sev N23 q 49 N9A 9 N OL Zt 8084 memo m 126B PAGE 25 72 335 __ 00061 WIIS OOF 2181 7 HLON31 TIVA3AO Oa vONY LS SNOISA3A 3S3H1 2 AINO ONLLSS L 1NV Id SAJINLIVINNAVW 203 337 SNId 9 Beh 5 20 AGI nommen S A 299 3 g 2 es Au Ue 162 N23 0121 y AA vt BASSI WILINI 204 39NV3v312 OS Z SL 126B PAGE 26 Q39NYv 4 5312138 ST AVNIWV WVASVIO 3NIILNDO WW TIVL 335 ON 29015 45003 SHOH 9 30556 IVILINI v AOLIINNOD AJINOSNV AL 9202 SZO 21 1268 PAGE 27 126B PAGE 28
12. be severely damaged if dropped Examinethefilter and shunt If either is dirty or blocked clean or replace as applicable Reassembly is the reverse of the removal procedure SWAGELOK FITTING WRVE SPRING PARKER O RING O RING 0 RING SHUNT amp O RING FILTER Fig 4 2 ALLEN HD MSCR NOTE W hen reinstalling the small range shunt ensure that corrugated sideis down 4 5 Range Changes Remove end cap and shunt assembly per Section 4 4 above T he 0 10 sccm to 0 300 sccm range shunt has tubes while the medium range shunt is built from a coil of corrugated stainless steel foil T he medium range shunt has a disk assembly with two large one medium and one small hole To change ranges the disc on the inlet of the shunt should be loosened turned and retightened to exposethe number of holes or tubes as listed below for the range desired SIZE RANGE SHUNT SETUP SMALE taria O IO aaa uma 0 tubes EE 0 30 56 cio oe ere ae 0 50 enm nini eres eM A nennen enne 9 T 0 250 5 1 c att ente L TUbES MEDIUM ae creas O23 Miri terra smallest hole 0 1 Mediumihole 0 3slpm nennen L large and small hole ERE I 0 5 large holes teri rx A Dalf washer 0 30 slpm Washer removed LARGE
13. cement parts and their factory stock numbers T heH FM 229 2298 HFM 200 HFM 200B and the H F C 202 shunts and filter discs are interchange able T he H F M 230 201 and the H FC 203 shunts and filter discs are also interchangeable T he same sensor module is used on all of the above models STOCK NO DESCRIPTION AIR RANGE 81 102L LOW RANGE SH UNT 10 30 50 100 250 SCCM 81 102H MED RANGE SH UNT 0 3 1 3 5 10 30 SLPM 81 102B HIGH RANGE SHUNT 50 100 150 300 500 SLPM 65 140E LEE Model S 2 2 0 N PT M e od rere ees 0 750 SL PM 65 1406 LEE M odelES 3 3 0 NDPT M 59 een 0 1500 SL PM 65 140 odel LS 4F 4 0 0 3000 SL PM 65 140K LFE odellES 6F 6 0 Flange u een mnm nns 0 6000 SL PM 65 140L LFE Modell S 8F 8 0 0 15 000 SLPM 39 02 003 SMALL FILTER DISC poniru 229 HFM 229 AND HFC 202 39 02 002 LARGE FILTER een 230AN D HFC 203 81 105 SENSOR MODULE mente ann ALL MODELS 65 595 FAST RESPONSE HFM ELECTRONICSCARD D CONNECTOR 81 115 PPP VITON O RING KIT FOR HFM 200 and 200 8116 e o POE no HP VITON O RING KIT FOR 201 81 146 PPM eet cinere e ote nts KALREZ O RING
14. cktheresisancebewen pins 1 amp 4 of thesensor T hisshould A y reed approximately 2 3 ohms Ifthisreedsopen circuit sensor wesprobably lt plugged intoPC boardimproperly and oneofthethamocoupleshasbeen destroyed R eplacesensor C hecktheresistancebetween pin 2 andthebaseofthe sensor T hisshould bean open circuit R epestfor pin 3andtthebase If resistance Fig 4 4 readingsarecorrectbutsensor isnotindicetingfiow thesensorisprobably plugged Cleenorreplaceasapplicable 126B PAGE 15 SYMPTOM Sensor has proper resistance readings butlittleor no output with flow CAUSE Plugged sensor ACTION Shut off gas supply and power supply Remove cover and PC board from unit Remove sensor assembly and examine If sensor has evidence of plugging clean or replace as applicable SYMPTOM Flowmeter reads other than 0 00VD C with no flow or there is a small flow when flowmeter reads 0 00VD C CAUSE ZERO potentiometer is out of adjustment ACTION Shut off all flow Adjust ZERO potentiometer until output reads 0 00 VD SYMPTOM Flowmeter out of calibration and non linear CAUSE Leaksin gas inlet or outlet fittings ACTION Check all fittings for leaks by placing soap solution on all fittings between gas supply and final destination of gas C heck flowmeter for leaks R eplace rings if required or recalibrate as necessary 126B PAGE 16 5 0 REPLACEMENT PARTS T he following is a list of the available repla
15. ded that the load resistance less than 2k Ohms 2 4 Mechanical Connections T hetransducer may be oriented in any position as long asthe direction of gasflow through the transducer follows the arrow marked on the bottom of the label T he preferred orientation is with the inlet and outlet fittings in a horizontal plane with the connector pointing up T he smallest passageway encountered on the H astings Flowmeter is 012 ID therefore steps should betaken to ensure proper filtering that prevents blockage of these passageways T herearetwo 8 32 threaded holes 1 4 deep in the bottom of the transducer that can be used to secure it to a mounting bracket if desired T hestandard inlet and outlet fittingsfor the HFM 229 Flowmeter are 1 4 Swagelok F or the 230 thefittings are 1 2 Swagelok O ptionalV CR andV CO fittingsare available from thefactory V iton O rings are standard with all fittings K alrez and eoprene O rings are optional and can be ordered from the factory FLOWMETER OUTPUT Fig 2 1 126B PAGE 7 T hestandard inlet and outlet fittings for the H 229B Flowmeter PT thread in thesizeof the pipe listed on the drawing on page 22 for sizes up to 3 laminar On the 4 6 and 8 laminars flange fittings arestandard Smooth tubulation is optional on all sizes It is suggested that all connections be checked for leaks after installation T his can be done by pressuriz in
16. eak free seal to theflowmeter inlet T hereferenceflow is vented to atmosphere and switches through theflowmeter when the valve is operated or fitting is connected T he valve or fitting should be close coupled to the flowmeter inlet to reduce pneumatic time delays T heresponse pot is not accessiblefrom the exterior of the flowmeter T hecover must beremoved to make any adjustments See Fig 4 1 U sing a voltmeter strip chart recorder or oscilloscope connected to theflow output voltage switch flow through theflowmeter and observe output voltage djust response pot to increase or decreaseresponsetime T he responsepotisasingleturn pot and a small pot adjustment produces a largeresponsetime change R emoveflow from flowmeter and allow output voltageto reach zero volts R epeattest until responsetimeis set 4 3 3 Miscellaneous Adjustments Periodically during normal operation the ZERO should be checked and adjusted when required 126B PAGE 13 4 4 Cap Removal heend cap on the inlet side must be removed to gain access to the filter or shunt assembly First shut off the supply of gasto the instrument D isconnect the Swagelok fitting on the inlet and outlet sides of theinstrument emove the four hex bolts holding the end cap to the instrument see F igure 4 2 Carefully removethe end cap filter wave spring and shunt noting their order and proper orientation NOT E TheM odel HFM 230 does not include a wave spring T he shunt can
17. equest P roduct Bulletin N o 544 1 3 2 Alarms T heM odel AL 1 Flow Alarm is available as an attachment suitable for use with any 0 5 00V D C input signal C alibrated digital dial precision pots determinethe low and high set points as a percent of full scale T his permits use with any range flowmeter or other instrument having a 0 5 00V D C linear output signal C ontrol action is within 0 2 of scale T heAL 1isavailablein the panel mount J package 1 3 3 Totalizer T heHastingsT R 1 FlowT otalizer integrates the 0 5 00 V D C signal generated by the flowmeter to give atotal flow reading C ount rates from 0 999 counts per minute are selectable by internal setting T he T R 1is available the panel mount J package 1 3 4 4 20 mA Current Converter T astings M C C 420 Series C urrent C onverter is an option available with astings M ass F lowmeters T he C C 420 produces a 4 20 mA signal from the 0 5 00V D C output of the flowmeter T heC C 420 is availablein the panel mount package 126B PAGE 6 2 0 INSTALLATION AND OPERATION T his section is designed to assist in getting a new flowmeter into operation as quickly and easily as possible Please read thefollowing thoroughly before attempting to install the instrument 2 1 Receiving Inspection Carefully unpack the astings lowmeter and any accessories that arrive with it Inspect it for any obvious signs of damage dueto shipment Immediately advise the ca
18. er range shunt consists of a corrugated stainless steel ribbon wound into a coil and fused T he higher range shunt is adjustable from 0 0 3 slpm to 0 30 slpm ranges Figure 3 6 126B PAGE 10 T he HFM 230 uses shunt which is acorrugated and fused shunt similar to the shunt used in the lower flow range instruments see Figure 3 7 T his highest range shunt is adjustable from 0 50 slpm to 0 500 slpm TheHFM 229B Series uses an external laminar flow element instead of an internal shunt becausethe necessary size for the element exceeds the body size of theflowmeter T his laminar flow element is made of a corrugated and fused stainless steel ribbon similar to theone used in the M odel HF M 230 Fig 3 7 126B PAGE 11 126B PAGE 12 4 0 MAINTENANCE 4 1 Introduction T his section contains service and calibration information Some portions of the instrument are delicate U seextreme care when servicing theflowmeter T he potentiometer positions and the electrical compo nents referred to in thetroubleshooting section can befound in Section 6 0 on the electrical component layout drawing 4 2 Authorized M aintenance With proper care in installation and use the flowmeter will require little or no maintenance If mainte nance does become necessary most of the instrument can be cleaned or repaired thefield Some procedures may requirerecalibration D o not attempt these procedures unless facilities are available E
19. f the transducer between 0 C and 50 Since some of the temperature shift results in a slight zero offset better results areobtained if theflowmeter is re zeroed atthe operating temperature T he flowmeter calibration may change by a factor up to 0 196 C astings M ass Flowmeters arefor GAS flow so DO NOT letthetemperature and or pressure of the gas reach a point that would cause gasto change to a liquid state or erroneous indications will result 2 6 3 Zero Check Turnthe power supply ON Allow theflowmeter 10 minutesto warm up Stop all flow through the transducer and check electrical zero CAUTION Do not assumethat all metering valves will completely shut off flow Even a slight leakage through a valve will cause an indication on the meter which will falsely appear to be a zero shift If necessary adjust the ZERO potentiometer located on the lower inlet side of the transducer until the meter indicates zero T his zero should be checked periodically during normal operation 2 Range Changing T herange of theflowmeter can be changed in thefield if recalibration facilities are available T he instructions to change the flow range be found in Section 4 5 In order to changethe range of a M odel H F M 230 Flowmeter a new laminar flow element must be purchased from the factory 1268 PAGE 8 3 0 THEORY OF OPERATION TEMPERATURE OF TUBE T his section contains an overall functional description of M odel HFM
20. g the transducer do not exceed 500 psig unless the transducer is specifically rated for higher pres sures and applying a diluted soap solution to theflow connections 2 5 Electrical Connections If apower supply was purchased from H astings Instruments installation will consist of connecting the cable purchased separately from the power supply from the rear of the supply to thetop of the flowmeter If a H astings supply was not purchased follow the instructions below to connect up the flowmeter T he power supply used must be capable of supplying 15VDC at 50mA T hese voltages must be referenced to common ground Refer to Fig 2 1 Connect 15V D C to pin 9 and 15V D C to pin 11 Pin 5 iscommon and must be connected to the common connection at the power supply Pin 7 isthecaseground and it should be connected to the cable shield if available to AC ground of the power supply Pin isthe output signal from the flowmeter T his output will be0 5V D C 5 D being 100 of rated or full flow 2 6 Operation 2 6 1 Power Supply Operation D o not connect transducers while the power supply is energized T he display may read either percent of full scaleor actual flow rate depending on the power supply purchased read flow rate turn display switch to desired channel 2 6 2 Ambient Temperature In order to maintain the accuracy of theflowmeter with changes in ambient temperature it is necessary to keep the temperature o
21. he sensor and the base See Figure 4 3 If the sensor is plugged it can be cleaned by running a fine wire approximately 0 008 diameter through thetube If sensor needs replacement obtain another from thefactory and install it Ensurethat O rings are clean and intact Install O rings on seating surface then carefully place sensor over O rings and tighten down the three screws evenly Replacement of sensor will require recalibration per Section 4 3 1 4 8 Troubleshooting SYMPTOM Output reads 40 of flow with no flow Zero pot has no effect CAUSE Power supply locked up or shorted out ACTION Turn off power supply for a few seconds then turn back on If this proves ineffective disconnect the unit from the power supply If power supply display does not return to zero then regulator chip in the power supply is probably burned out Check supply voltages and replace faulty regulator If display 1234 returns to zero after disconnecting the power supply from the unit there is a short the unit to ground C heck capacitors C 11 HERTER amp C 13 first SYMPTOM Output of unit is proportional to flow but extremely small and not correctable by span pot CAUSE Sensor is not being heated ACTION Unplug sensor from PC board Fig 4 3 Pinson sensor are numbered from leftto right Begin countingwith second pin from let saeF ig 1 1 44 Checktheresstancebewee pins2 amp 3ofthesensor hiswillreedbewen 2450 amp 2550 C he
22. ntry into thesensor or tampering with the printed circuit board will void warranty D o not perform repairs on these assemblies while unit is still under warranty 4 3 Adjustments 4 3 1 Calibration Procedure 1 Connect power cable to D connector as specified in Section 2 5 A llow instrument to warm up for 30 minutes with all flow shut off 2 Set ZERO potentiometer for 0 000 VD C output at pin 6 on the D connector or flow output pin on the rear of the H astings Power Supply 3 Turn on air supply to inlet of instrument A djust flow rate to 100 according to flow reference 4 Adjust SPAN potuntil the flowmeter gt gt gt indicates full scaleflow 5 000VDC NOT E Perform this step only if a i i il 00000090 an reference flowmeter is avail 000000 able SLOWER lt RESPONSE POT FASTER 5 Record flowmeter and flow reference outputs for flow rates of 20 40 60 80 and 100 4 3 2 Response T ime Adjustments R eadjustments of the fast response circuit should not benecessary unless changes in the range or sensor have been performed T he flowmeter should be calibrated before setting the response time IM PORTANT Responsetime cannot Fig 4 1 be tested with a simple shutoff valve Pressure buildsup behind the valve and when opened creates a surgeflow in excess of the calibrated flow rate W hat must be used is atwo way afitting which can be quickly connected and provide a l
23. rrier who delivered the shipment if any damage 15 suspected Compare each component shipped against the packing list Ensurethat all parts are present i e flowmeter power supply cables etc O ptional equipment or accessories will be listed separately on the packing list see Section 1 4 Accessories T here may also be one or more OPT options on the packing list T hese normally refer to special ranges or special gas calibrations T hey may also refer to special helium leak tests or high pressure tests or special modifications such as high temperature or special O ring materials most cases these are not separate parts but rather special options or modifications built into theflowmeter or power supply 2 2 Power Requirements Model Flowmeters require 15VDC 50 mA max he 15V D C can vary between 14 25 VDC and 15 75VDC T hesupply voltage should be regulated with no more than 50 mV ripple Surge suppressers are recommended to prevent power line spikes from feeding through to the instruments T hese power requirements are satisfied by the H astings Power Supply described in Section 1 4 Accessories 2 3 Output Voltage T he output of the flowmeter is a 0 5 00V D C signal proportional to the flow rate T he output is sent to the display and is available at terminals at the rear of the astings Power Supply If aH astings supply is not being used the output is available on pin 6 of the D connector It is recommen
24. then the output is adjusted using gas correction factors 1 1 Features Hastings Fast Response Flowmeters have response times of less than two seconds to 98 of 0 100 step change with less than 2 overshoot FastResponseH FM Flowmeters are available with a 15 pin D connector and are pin for pin compatible with most other manufacturers thermal mass flowmeters with 20 pin connectors HFM M odels incorporate a removable replaceable sensor which virtually eliminates long down time dueto clogging the most common cause of failure the industry Each flowmeter hasa shunt which can be quickly and easily adjusted in thefield to different ranges however recalibration is normally required A 100 micron filter is located upstream of the shunt and sensor to eliminate most of the larger impurities in the system which tend to plug thermal mass flowmeters T heM odel HFM Flowmeter comes in 15 standard ranges from 0 10 SCCM to 0 500 SLPM Special ranges are available upon request M odel HFM Flowmeters areconstructed of 300 series stainless steel V iton is standard for O rings amp seals eopreneand K are available upon request for use with corrosive gases 1 2 Specifications Response IME to 9896 of 0 10096 step change L ess than 2 seconds Accuracy LT 1 F S rers E 0 2 F S e Std Pressure Rating xt eun ER iaa 500 psig
25. uential damages Hastings Instruments will at its option repair replace or refund the selling price of the product if Hastings Instruments determines in good faith that it is defective in materials or workmanship during the warranty period D efective instruments should be returned to astings Instruments together with a written statement of the problem and aR eturn M aterial A uthorization RM A number Please consult the factory for your RM A number before returning any product for repair N on Warranty Repair Policy Any product returned for a non warranty repair must be accompanied by a purchase order RM A form and a written description of the problem with the instrument If the repair cost is higher you will be contacted for authorization before we proceed with any repairs If you then choose notto havethe product repaired a minimum will be charged to cover the processing and inspection Please consult the factory for your RM A number beforereturning any product for repair TELEDYNE HASTINGS 804 EWCOM BE AVENUE HAMPTON VIRGINIA 23669 U S A ATTENTION REPAIR DEPARTMENT TELEPHONE 757 723 6531 1 800 950 2468 FAX 757 723 3925 126B PAGE 19 126B PAGE 20 7 0Diagrams and Drawings 126B PAGE 21 4 gt C SENSITIVE COMPONENTS HANDLE ONLY AT APPROVED ESD WORKSTATION RES 3 52 1 8 WATT 1 158 KOHM TEMPSISTOR 1055 810 ETC EE BOARD OHM 1
Download Pdf Manuals
Related Search