manualshive.com logo in svg

Teledyne HASTINGS HFC-302, Инструкция по эксплуатации, Страница: 19 / 32

Поделиться
Скачать
Teledyne HASTINGS HFC-302 Скачать руководство пользователя страница 19

301/303/305/306/307 Flowmeters and Controllers Instruction Manual

 

EAR99 Technology Subject to Restrictions Contained on the Cover Page

 

Page 19 of 32 

SOLUTION: 

Use the formulas above: 

𝐹𝑙𝑜𝑤 𝑅𝑎𝑡𝑖𝑜 = 5% = 0.05,

𝑆𝑐𝑎𝑙𝑒 𝐹𝑎𝑐𝑡𝑜𝑟 =

(0.05)(100)(5)

(10)(5)

= 0.5

 

 
Scale the output of controller A by 0.5 (half) and route the signal to the setpoint of controller B to flow 
5% of controller A. 
 

 

Output Filter 

Occasionally  noise  from  a  user’s  system  is  superimposed  on 

the  output  signal  voltage.  This  noise  may  be  due  to  high 
turbulence  in  the  flow  stream  (the  sensor  is  fast  enough  to 
measure  this)  or  it  could  be  electrical  noise  when  the  flow 
instrument has a high internal gain (flow instruments with low 

full-scale  flows  ~  25  slm).  Varying  levels  of  radio  frequency 
noise  or  varying  airflow  over  the  electronics  cover  can  also 
induce noise. 

Noise  can  be  most  pronounced  when  measuring  the  flow 

output with a sampling analog/digital (A/D) converter.  When 
possible,  program  the  system  to  take  multiple  samples  and 
average the readings to determine the flow rate.   

If less noise is desired, install a jumper over the pins of JP1 on 
the  flow  measurement  card.  See  Figure  above  and  right. 

Covering the two bottom pins (2 & 3), will activate a resistor-
capacitor  (RC)  filter  that  has  a  time  constant  of  0.1  second. 
This will increase the settling time of the indicated flow rate to approximately 0.4 seconds and remove 
much  of  the  noise.  Covering  the  top  two  pins  (1  &  2),  will  increase  the  filter  time  constant  to  1 
second.  This will increase the settling time to approx. 4 seconds and remove most of the noise. 

This adjustment will not affect the calibration of the flow meter circuit or the actual flow response to 
change  in  command  signal  (flow  controllers).    This will  only  slow  down  the  indicated  response  (output 
voltage/current). 

 

 

Содержание HASTINGS HFC-302

Страница 1: ...NSTRUCTION MANUAL www teledyne hi com I S O 9 0 0 1 C E R T I F I E D Use and Disclosure of Data Information contained herein is classified as EAR99 under the U S Export Administration Regulations Export reexport or diversion contrary to U S law is prohibited ...

Страница 2: ...Number 152 072014 July 2014 Revision S Document Number 152 032015 March 2015 Revision T Document Number 152 072016 July 2016 Revision U Document Number 152 042017 April 2017 Revision U Document Number 152 042017 August 2022 Visit www teledyne hi com for WEEE disposal guidance Description of Symbols and Messages used in this manual WARNING indicates a hazardous situation which if not avoided could ...

Страница 3: ...Quality Filtering 12 2 4 2 Mounting 12 2 4 3 Plumbing 12 ELECTRICAL CONNECTIONS 13 OPERATION 15 2 6 1 Operating Conditions 15 2 6 2 Zero Check 15 2 6 3 High Pressure Operation 15 2 6 4 Vertical Mounting 18 2 6 5 Gas Blending 18 RANGE CHANGING ERROR BOOKMARK NOT DEFINED OUTPUT FILTER 19 CONTROLLING OTHER PROCESS VARIABLES EXTERNAL INPUT 20 COMMAND INPUT 20 VALVE OVERRIDE CONTROL 20 GAIN POTENTIOMET...

Страница 4: ...s and Controllers Instruction Manual EAR99 Technology Subject to Restrictions Contained on the Cover Page Page 4 of 32 WARRANTY REPAIR POLICY 27 RETURN POLICY 27 6 DRAWINGS 28 HFM 301 28 HFC 303 29 HFM 305 30 HFM 306 31 HFC 307 32 ...

Страница 5: ... for all other models Instruments are normally calibrated with the appropriate standard calibration gas nitrogen then a correction factor is used to adjust the output for the intended gas Calibrations for other gases such as oxygen helium and argon are available upon special order NOTICE The instruments described in this manual may be available with multiple pinouts Ensure that all electrical conn...

Страница 6: ... on scale when flows an order of magnitude over the full scale flow rate are measured This means no false acceptable readings during leak testing MODULAR SENSOR The Hastings 300 series incorporates a removable replaceable sensor module Field repairs to units can be achieved with a minimum of production line downtime Replacing the sensor requires a recalibration FAST SETTLING TIME Changes in flow r...

Страница 7: ...Maximum 0 12 FS C 20 70 C Temperature Coefficient span Maximum 0 08 Reading C 20 70 C WARNING Operation above 60 C ambient may result in case temperatures capable of causing burns Leak Integrity 1x10 9 sccs Flow Ranges 25 to 10 000 slm N2 Equivalent Standard Output 0 5 VDC load min 2k Ω Optional Output 4 20 mA see load requirements in section 1 3 Power Requirements 14 16 VDC 70 mA meters absolute ...

Страница 8: ...kg HFM 305 8 1 lbs 3 7 kg HFM 306 28 8 lbs 13 1 kg HFC 301 15 2 lbs 6 9 kg Electrical Connector 15 pin subminiature D Fitting Options HFM 301 HFC 303 tube 10 12 20 mm tube 3 8 Male NPT and VCR and VCO 16 and 1 1 16 MS straight female Surface Mount 301 small base only HFM 305 HFC 307 1 tube 25 mm tube 1 Male NPT 1 Female NPT 1 VCR and VCO 1 5 16 12 SAE MS Female thread HFM 306 1 1 2 tube 25 mm tube...

Страница 9: ...n 6 of the DA 15 connector The current loop is sourced internally from the 15 VDC supply and must be returned to either the signal common pin 5 or the supply common pin 9 after passing through the monitoring circuitry to complete the loop If returning the current to pin 5 signal common the load must be between 0 and 600 ohms If returning current to pin 9 supply common the load must be between 600 ...

Страница 10: ...f switch not be blocked Throughout this manual when reference is made to a power supply it is assumed the customer is using a Hastings power supply Hastings Power supplies change as new technology becomes available For knowledge of the most up to date Hastings power supplies please consult either Hastings sales staff or our website at http www teledyne hi com WARNING To prevent the spread of fires...

Страница 11: ...ument is ready for operation Power Requirements At their maximum power draws the HFM 301 305 306 307 meters require 15 VDC 70 mA and the HFC 303 307 controllers require 15 VDC 185 mA See specifications in sections 1 2 The HFM 300 HFC 302 Series supply voltages should be reasonably regulated as power supply ripple may propagate to the output less than 50 mV ripple is preferred The supply voltage ca...

Страница 12: ...sible install the instrument horizontally Always re zero the instrument with zero flow at its normal operating temperature and purged with its intended gas at its normal operating pressure NOTICE The flow instrument should be installed in a clean and careful manner Take care not to drop the product and avoid impacts to prevent damage WARNING Make sure the work area is safe de pressurized before in...

Страница 13: ...both Pin 6 is the output signal from the flow meter The standard output will be 0 to 5 VDC where 5 VDC is 100 of the rated or full scale flow The command set point input should be a 0 5 VDC signal or 4 20mA if configured as such and must be free of spikes or other electrical noise as these would generate false flow commands that the controller would attempt to follow The command signal should be r...

Страница 14: ...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 Signal Common 7 Case Ground 8 Case Ground 8 Valve Override 9 Valve Override 9 15VDC 10 10 Do not use 11 15VDC 11 15VDC 12 External Input 12 Signal Common 13 Signal Common 13 External Input 14 Signal Common 14 Set Point 0 5 VDC 4 20mA 15 Set Point 0 5 VDC 4 20mA 1...

Страница 15: ...t the zero potentiometer located on the inlet side of the flowmeter until the meter indicates zero For the optional 4 20 mA output adjust the zero potentiometer so that the meter indicates 4 mA This zero should be checked periodically during normal operation Zero adjustment is required if there is a change in ambient temperature or vertical orientation of the flow meter controller 2 6 3 High Press...

Страница 16: ...301 303 305 306 307 Flowmeters and Controllers Instruction Manual EAR99 Technology Subject to Restrictions Contained on the Cover Page Page 16 of 32 ...

Страница 17: ...pressure measurements this error must be corrected The formula for predicting the nitrogen mean error expressed as a fraction of the reading are Sensor Type A B 0 026 2 2915 10 7 5 7198 10 5 0 017 7 1066 10 8 5 2403 10 5 0 014 5 3091 10 8 6 1278 10 5 𝐸𝑟𝑟𝑜𝑟 𝐴𝑃 𝐵𝑃 Where P is the pressure in psig and Error is the fraction of the reading in error The flow reading can be corrected as follows 𝐶𝑜𝑟𝑟𝑒𝑐𝑡𝑒𝑑 ...

Страница 18: ... for nitrogen air versus pressure CAUTION The HFM 306 does not have a high pressure option and is only rated for a 300 psig max working pressure 2 6 5 Gas Blending Gas blending is achieved by using the output of one flow controller as the control signal setpoint or scaled setpoint to a second flow controller maintaining a fixed ratio of one gas to another Multichannel Hastings Power Supplies allow...

Страница 19: ...an also induce noise Noise can be most pronounced when measuring the flow output with a sampling analog digital A D converter When possible program the system to take multiple samples and average the readings to determine the flow rate If less noise is desired install a jumper over the pins of JP1 on the flow measurement card See Figure above and right Covering the two bottom pins 2 3 will activat...

Страница 20: ...nal it may be necessary to adjust the gain potentiometer see section 2 11 Command Input The flow controller will operate normally with any command input signal between 0 5 volts 4 20 ma for units with 4 20 ma input output cards If the command signal exceeds 14 volts it may damage the circuit cards During normal operation the control loop will open or close the valve to bring the output of the flow...

Страница 21: ...r clockwise will speed up the valve reaction time to changes in the command signal 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 This error is added to the overall outpu...

Страница 22: ...ay require recalibration Do not attempt these procedures unless facilities are available Entry into the sensor or tampering with the printed circuit board will void the warranty Do not perform repairs on these assemblies while unit is still under warranty Troubleshooting This section includes some of the more common issues that may arise when using a Hastings flow meter or controller Symptoms caus...

Страница 23: ...w when the flow meter reads 0 00 VDC Cause Zero pot is out of adjustment 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 See figure in section 2 12 For the optional 4 20 mA output adjust the zero potentiometer so that the meter indicates slightly more than 4 mA i e 4 03 to 4...

Страница 24: ... as needed Refer to step 3 above Endcap Removal The end cap on the inlet side must be removed to gain access to shunt assembly First remove power and shut off the supply of gas to the instrument Disconnect the fittings on the inlet and outlet sides of the transducer and remove it from the system plumbing On the HFM 301 305 and HFC 303 307 Remove the four screws holding the end cap to the instrumen...

Страница 25: ...logo Remove the screws and lift off the 4 20 mA board Be careful not to damage the main board and 4 20 mA board connectors 2 Replacement of the main PC board Unplug the power cable from the instrument s D connector Remove the fasteners and steel can Remove the 4 screws which fasten the main PC board to the sensor module Gently unplug the main board from the sensor and from the 4 20 mA board if pre...

Страница 26: ... desired flow rate of a process gas other than nitrogen you divide the desired rate by the GCF For example to get a desired flow of 20 sccm of argon flowing through the meter divide 20 sccm by 1 4047 20 sccm Ar 1 4047 14 238 sccm N2 That is you set the Nitrogen calibrated meter to read 14 238 sccm Some meters specifically the high flow meters are calibrated in air The flow readings must be correct...

Страница 27: ...anty or non warranty repair must have been issued a Return Material Authorization RMA form RMA Forms may be obtained from the Information section of the Hastings Instruments website http www teledyne hi com inforeq htm WARNING Contaminated parts can be detrimental to health and environment Ensure instruments are free of hazardous contamination prior to shipment Company contact information TELEDYNE...

Страница 28: ...Controllers Instruction Manual EAR99 Technology Subject to Restrictions Contained on the Cover Page Page 28 of 32 6 Drawings The following pages display the top level drawing dimensions for the HFM 301 305 306 and the HFC 303 307 HFM 301 ...

Страница 29: ...301 303 305 306 307 Flowmeters and Controllers Instruction Manual EAR99 Technology Subject to Restrictions Contained on the Cover Page Page 29 of 32 HFC 303 ...

Страница 30: ...301 303 305 306 307 Flowmeters and Controllers Instruction Manual EAR99 Technology Subject to Restrictions Contained on the Cover Page Page 30 of 32 HFM 305 ...

Страница 31: ...301 303 305 306 307 Flowmeters and Controllers Instruction Manual EAR99 Technology Subject to Restrictions Contained on the Cover Page Page 31 of 32 HFM 306 ...

Страница 32: ...301 303 305 306 307 Flowmeters and Controllers Instruction Manual EAR99 Technology Subject to Restrictions Contained on the Cover Page Page 32 of 32 HFC 307 ...

Отзывы:

Нет отзывов