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Sarasota 200 Ultrasonic Multipath
Flowmeter

Appendix 1 GAFA PC Software Page A1-5

Thermo Fisher Scientific

APPENDIX 1 GAFA PC SOFTWARE

A1.3.3 (View) Flow Meter Status

Notes

•

“Software IDs” are the issue numbers of the software loaded on the system cards

•

“CPU Power Rails” show the values of the internal supply voltages.

•

“Status” conditions are red for a fault and green for OK.

•

For “Channel” status, “Level” is red if all the levels are faulty and “Path” if all the paths
are faulty. These are “fatal” conditions that could prevent flow being calculated. Under
these conditions, a flow figure could still be estimated using the flow estimation table,
See A1.4.2.5

•

“Relay Status” indications depend on conditions as set on the “Station Configuration –
Relay” screen.

•

Click on “Refresh” to update displayed data.

•

Relays may be reset on this screen or alternatively on the “Station Configuration -
Relays” screen A1.4.1.3.

•

Click on X or Cancel or press the escape key to return to the Main screen.

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Summary of Contents for HB-S200

Page 1: ...Part of Thermo Fisher Scientific Sarasota 200 Ultrasonic Multipath Flowmeter User Guide P N HB S200 Revision A ...

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Page 3: ...Sarasota 200 Ultrasonic Multipath Flowmeter User Guide P N HB S200 Revision A ...

Page 4: ......

Page 5: ...result of errors or omissions Thermo Fisher reserves the right to make changes to the manual or improvements to the product at any time without notice The material in this manual is proprietary and cannot be reproduced in any form without expressed written consent from Thermo Fisher Thermo Fisher Scientific 1410 Gillingham Lane Sugar Land TX 77478 USA Phone 713 272 0404 Fax 713 272 2272 Web www th...

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Page 7: ...amily tree 2 3 Flowmeter contents and options 2 3 1 Flowmeter layout 2 3 2 Internal components 2 3 2 1 Mother board 2 3 2 1 1 Power supply internal battery 2 3 2 1 2 Transducer connections 2 3 2 1 3 Depth input signals 2 3 2 1 4 Output signal connections 2 3 2 1 5 Relay connections 2 3 2 1 6 Digital signal connections 2 3 2 1 7 Serial communications 2 3 2 2 Central processor CPU 2 3 2 3 LCD displa...

Page 8: ...lies 4 5 Connecting transducers to flowmeter 4 6 Transducer alignment 4 7 Output connections 4 8 Power connection SECTION 5 COMMISSIONING 5 1 Site dimensions 5 2 Powering up 5 3 Programming 5 4 Setting up 5 5 Outputs SECTION 6 CALIBRATION VERIFICATION 6 Calibration verification SECTION 7 MAINTENANCE 7 1 Channel maintenance 7 1 1 Weed 7 1 2 Profile 7 1 3 Debris 7 2 Flowmeter maintenance 7 3 Routine...

Page 9: ...4 1 1 MHz A2 4 2 500 kHz A2 4 3 Other frequencies A2 4 4 Transducer cable A2 5 GAFA software APPENDIX 3 REFERENCES A3 References APPENDIX 4 SITE DATA BOOK A4 1 Model and serial number A4 2 Site and customer A4 3 General description A4 4 Software issue A4 5 Card layout in rack A4 6 Programmed data A4 7 Schedule of drawings A4 8 Test certificates APPENDIX 5 I S INTERFACE AND TRANSDUCER A5 1 Introduc...

Page 10: ...Sarasota 200 Ultrasonic Multipath Flowmeter INDEX Page 4 Thermo Fisher Scientific INDEX This page is blank ...

Page 11: ...r Weed growth between the transducers unless it is regularly cut High levels of suspended solids greater than 2000 mg l Gradients of salinity the actual value of salinity is however unimportant Gradients of temperature the actual temperature is however unimportant In relatively small channels up to 5 metres the method is more tolerant of suspended solids and therefore is often used in sewage appli...

Page 12: ...ents are made at different positions for example on either side of the channel Another advantage is that flow may still be computed even if a level sensor fails Level may be determined by using one or more ultrasonic transducers in the water facing upwards The time taken for a pulse of sound to return to the transducer after being reflected from the surface is converted into level using the veloci...

Page 13: ...he water level and the shape of the channel The channel shape need not be the same as the projected width between the transducers For example if the transducers are mounted on piles inset from the channel sides For the purposes of flow determination the cross section area is divided into horizontal slices determined by the channel bed the heights of the paths themselves and the water surface level...

Page 14: ... additional slice is defined between the bed and a line half way between the bed and the bottom path This bottom slice has a weighting factor K normally between 0 4 and 0 8 to allow for the slow moving water near the bed To reduce the uncertainty of this factor the bottom path should be positioned as close to the bed as practical Illustration of the mid section method for 4 paths Height HS Path 4 ...

Page 15: ... V4 V3 in the event of Hs H4 being greater than H4 H3 The lower boundary of the bottom slice is the bed This bottom slice has a weighting factor KB normally between 0 4 and 0 8 to allow for the slow moving water near the bed The mean section method is superior in cases where the paths are not near the slice centres but the mid section method handles the top slice better The more paths that are dep...

Page 16: ...size or uneven profile Multiple channels Please consult Thermo Fisher Scientific for examples and advice 1 2 7 Transducer frequency Transducers are manufactured with characteristic frequencies These are in the range 1 MHz to 250 kHz For propagation reasons the greater the path lengths the lower the frequency and the larger the transducer As a guide path lengths below 10 metres would use 1MHz trans...

Page 17: ...r Paths entered as being at the same height are taken as crossed otherwise they are separate Separate paths may be normal with transducers on each side or reflected with transducers on one side only The latter method saves cable but is not recommended because of the increased path lengths and sensitivity to alignment The velocities calculated by a pair of paths comprising a crossed path are averag...

Page 18: ...The flowmeter is programmed with a fixed level input corresponding to the top of the conduit Transducer and bed levels All heights may be set to a fixed datum local or national or relative to mean bed level The former requires a height for the bed and avoids re entering all path and level transducer heights in the event of a change to the bed General Instantaneous means the average over the cycle ...

Page 19: ... In that case they are in sealed in line housings known as Tboxes Automatic adjustment of receiver gain and transducer drive voltage HT Low power consumption and intermittent modes make mains free operation feasible Multi path operation up to 4 with multi drop facility made possible by smart transducer addressing to save cable Multiple water level inputs subject to a maximum of 4 overall up to 4 u...

Page 20: ...th system Internal Battery option Central Processor inc 2 x serial I O Display External power source Inputs 2 x 4 20 mA Relays 2 x VFC Auxiliary depths Transducer u s interface d s Level Trans 1 d s Trans 4 d s Level Transducer Option Trans 2 d s Trans 1 u s Trans 2 u s Trans 3 d s Trans 3 u s Trans 4 u s Star J box Star J box Flow Outputs 2 x 4 20 mA 11 to 30 V DC External equipment Power control...

Page 21: ...c SYSTEM COMPONENTS 2 3 Flowmeter contents and options 2 3 1 Flowmeter layout Fig 1 Sarasota 200 Flowmeter Front panel view This view of the Sarasota 200 shows the LCD display see section 2 3 2 3 the cable entry glands at the bottom the wall mounting brackets see Appendix 2 for mounting dimensions s š RPP ...

Page 22: ...ft corner The connection panel is part of the mother board which contains the input output and power management functions It supports the main processor CPU card and the transducer interface TIF card which plug in beneath the protective cover The connection panel is shown on a larger scale in Fig 3 The internal battery allows operation to continue when the external power source has failed This is ...

Page 23: ...Y 3 pins NC Common and NO Status LED Inputs See section 2 3 2 1 3 PL10 INP 1 3 pin plug 4 20 mA PL11 INP 2 3 pin plug 4 20 mA Outputs See section 2 3 2 1 4 PL18 OUT 1 4 pin plug 4 20 mA PL19 OUT2 4 pin plug 4 20 mA Ultrasonic transducer connections See section 2 3 2 1 2 SK2 LEVEL L BNC coaxial socket for ultrasonic water level transducer s if fitted SK3 UPSTREAM A BNC coaxial socket for upstream v...

Page 24: ...wer failure The internal battery is automatically charged by the power supply when external power is being supplied Power consumption and the period of operation from the internal battery option depend on the mode of operation and are given in the specification The fuse values are both T1A 2 3 2 1 2 Transducer connections For an in line configuration of velocity paths there will be 2 star junction...

Page 25: ...ich case the outputs are not isolated or from the external device in which case they are isolated Pin Signal name Connect for internal loop power Connect for external loop power Comment 1 0V 4 20mA 2 4 20mA 4 20mA 3 4 20mA 4 V Link 3 4 Applies to OUT1 PL18 and OUT2 PL19 2 3 2 1 5 Relay connections There are 3 relay connections PL17 System fault relay This relay has Normally Open NO Normally Closed...

Page 26: ...ogged data PL14 RS232 via 9 way D connector male See Fig 3 This port is used for connection to a modem for remote access for programme alterations diagnostics and downloading logged data Pin F Signal Comment 2 TxD 3 RxD 5 0V SK5 RS232 PC connection 9 way female D connector Pin M Signal Comment 1 CD 2 RxD 3 TxD 4 DTR 5 0V 7 RTS 8 CTS 9 RI PL14 RS232 Modem connection 9 way male D connector 2 3 2 2 C...

Page 27: ... board by removing the cover The transducer connections are made via internal cables to the mother board The jumper links on the card should not be altered When a TIF is changed during service the replacement must have the same links set 2 3 2 5 AC Power adapter module The adapter is an external module It allows the Sarasota 200 to be operated from AC mains electricity between 90 and 264 Volts and...

Page 28: ...ers connected to each star box must be pre programmed with different addresses from 1 to 4 to enable each one to be operated separately by the flowmeter Specialist equipment is necessary to programme the transducers and it is usual for them to be supplied with specified addresses 2 4 3 1 MHz transducers For use with path lengths up to 10 metres In cases where serious attenuation is anticipated for...

Page 29: ...ation more difficult where there is the need to pull cables through ducts The 500 kHz transducer also has a temperature sensor built in allowing water temperature at each transducer to be recorded by the Sarasota 200 2 4 4 Lower frequency transducers Consult Thermo Fisher Scientific about low frequency transducers for path lengths above 80 metres or where conditions might attenuate higher frequenc...

Page 30: ...6 1 Operating firmware The flowmeter is supplied with the operating firmware already loaded It would not normally be necessary to re load the firmware In the event that new firmware is to be loaded Thermo Fisher Scientific will provide the procedure or carry out the operation Alternatively upgrades may be loaded remotely by Thermo Fisher Scientific via a modem 2 6 2 GAFA PC software GAFA software ...

Page 31: ...equipment for example modems telemetry outstations GSM modems Power supplies for example solar power systems plus often some civil work for cable ducts supporting piles etc The additional items are often supplied and installed by Thermo Fisher Scientific as part of the contract in which case details will be included in Appendix 4 Site Data Book 3 2 Transducer mounting hardware Thermo Fisher Scient...

Page 32: ...Sarasota 200 Ultrasonic Multipath Flowmeter Section 3 PERIPHERAL EQUIPMENT Page 3 2 Thermo Fisher Scientific PERIPHERAL EQUIPMENT This page is blank ...

Page 33: ...mended that prior to the installation the installer should write a method statement detailing The scope and purpose of the work The steps in the operation Interaction with others The personnel to be involved Their qualifications for the work Protective clothing and equipment Machinery tools etc Emergency contacts and procedures A risk assessment should be carried out and both the method statement ...

Page 34: ...een supplied and accepted prior to delivery of the equipment The drawings will be a useful guide to checking the inventory of equipment delivered The equipment supplied should be carefully unpacked and checked for content and damage The transducers may have been supplied in rack assemblies ready to be fixed to the supporting structure There will normally be two or four racks for in line or crossed...

Page 35: ...calculation see 1 2 5 4 6 Transducer alignment At this stage it is usual practice to align the transducers Each transducer should point at its partner to within 1o The method used will vary according to the conditions Pre set alignment derived from construction drawings Visual methods involving pointers and sighting arrangements Low power laser methods If the transducers are in the water only the ...

Page 36: ...Sarasota 200 Ultrasonic Multipath Flowmeter Section 4 INSTALLATION Page 4 4 Thermo Fisher Scientific INSTALLATION This page is blank ...

Page 37: ...easily carried out by means of a tape measure Angles may be determined by triangulation 5 2 Powering up Check that the flowmeter has been connected up correctly and the cards are plugged in securely Load the GAFA software into a PC and plug in to the PC serial port Switch on the power source The LCD will be activated though the display may be meaningless at this stage 5 3 Programming The flowmeter...

Page 38: ... outputs may be forced to a value of mA which may be entered via the PC See Loop Test Appendix 1 A1 4 1 2 This is a valuable tool for setting up the link to peripheral equipment The forced values may be confirmed by a calibrated multi meter Correspondence between the displayed selected parameter value and the output should be checked It is possible to force the outputs by temporarily changing the ...

Page 39: ...verall performance of the flow determination Whether for calibration or verification purposes the comparison method to be used will be the same and will depend on the site Reference is made to ISO 748 for details of methods See Appendix 3 References The most common method used is by current metering using a calibrated rotating element or electromagnetic current meter Recently the use of an acousti...

Page 40: ...Sarasota 200 Ultrasonic Multipath Flowmeter Section 6 CALIBRATION VERIFICATION Page 6 2 Thermo Fisher Scientific CALIBRATION VERIFICATION This page is blank ...

Page 41: ...er it has changed since the flowmeter was programmed It is particularly important to check the bed where silt might have been deposited or scouring could have occurred Changes may be required to the programmed channel shape or mean bed level In serious cases it may be necessary to dredge the channel taking care not to damage the transducers The user must decide on the checking regime to suit the c...

Page 42: ...tion one of the relays may be programmed to initiate an early warning call via a telemetry outstation 7 3 2 On site It is recommended that regular checks be made on site These should include A visual observation of the equipment in the channel and the flowmeter A functional check of the operation of the paths levels and outputs A check on the operation of the internal battery A verification of cal...

Page 43: ...g A1 5 Log A1 6 Waveform A1 7 Password Help A1 3 1 Flow Level A1 3 2 Velocity Paths A1 3 3 Flow Meter Status A1 4 1 Station Config A1 5 1 Logging A1 6 1 Waveform Capture A1 5 1 1 Log Config A1 4 1 1 System A1 4 1 2 I O Allocation A1 4 1 3 Relays A1 4 1 4 Comms A1 4 2 Channel Config A1 4 2 1 Channel A1 4 2 2 Velocity Path A1 4 2 3 Level A1 4 2 4 Profile A1 4 2 5 Flow Est A1 4 3 Read Gauge Config A1...

Page 44: ...the arbitration rules given in section 1 of this manual Average temperature is taken from all sensors with transducers that are in the water Transducers above the water are not included Temperature is measured by sensors in the transducer smart electronic circuits For 1 MHz transducers this will often not be water temperature since the circuits are in Tboxes which may be out of the water Individua...

Page 45: ...ration System screen A1 4 1 1 Daily Mean is the flow for the previous 24 hour period to the DMD time as set on the Station Configuration System screen A1 4 1 1 The Daily Mean value will only change at the set time Cumulative Total volume is from the date indicated as set via the Station Configuration System screen A1 4 1 1 Cumulative Today is from the DMD time to the present time Level Inputs are ...

Page 46: ...ngth divided by the transit time Velocity is the water velocity calculated for each path see Section 1 of the manual TOF is the ultrasonic time of flight or transit time Diff is the difference in transit times between the upstream and downstream directions Temp is the temperature measured by sensors in the transducer smart electronics This will be water temperature for transducers other than 1 MHz...

Page 47: ...el status Level is red if all the levels are faulty and Path if all the paths are faulty These are fatal conditions that could prevent flow being calculated Under these conditions a flow figure could still be estimated using the flow estimation table See A1 4 2 5 Relay Status indications depend on conditions as set on the Station Configuration Relay screen Click on Refresh to update displayed data...

Page 48: ... each measuring cycle Set the time of day for the Daily Mean Discharge daily mean flow calculation Set the date and time Select the power source used by the power supply alarm threshold circuits Select low power control if required via external interrupt or internal timer Select the units of measurement Select the items to be displayed on the LCD by clicking on Edit Display List see picture right ...

Page 49: ...el input USL for an ultrasonic upward facing transducer For this selection a multi drop address between 1 and 4 must be specified via the Input drop down If there is only 1 USL use Input 1 on the drop down Analogue for 4 20 mA auxiliary depth inputs For this selection input 1 or 2 must be selected on the drop down Fixed for a channel where the depth does not change e g a full pipe Click on Write t...

Page 50: ...lay may be selected for any path or paths The relay will then operate in the event of a fault on any of the paths for which the relay is selected Click on Write to confirm selected levels to the Sarasota 200 Click on Exit to abandon selection See Channel Configuration Velocity Paths A1 4 2 2 to set up the selected paths Notes Analogue Outputs There are 2 analogue 4 20 mA outputs Click on each one ...

Page 51: ...ion table is being used in place of the normal transit time measurements Path Failed If selected this is actioned for failure of any of the paths which have been selected via the I O Allocation screen A1 4 1 2 Level Failed If selected this is actioned when all the levels fail Level Low Alarm Define the low level threshold to operate the relay selected Level High Alarm Define the high level thresho...

Page 52: ... PC SOFTWARE A1 4 1 4 Station Configuration Comms Notes Use this screen to set up the serial ports Click on Write To Gauge to confirm selections to the Sarasota 200 or Cancel to abandon When the modem comms configuration is changed the dial up connection will be lost and it will be necessary to re dial to re establish comms ...

Page 53: ... offsets must be specified relative to the Mean Bed Level via Channel Configuration Velocity Path and Channel Configuration Level screens A1 4 2 2 and A1 4 2 3 Level Arbitration is the allowable difference between individual level measurements Fire Sequence is normally Simultaneous Alternate should only be used if there is a risk of reflections from a transducer being confused with signals being t...

Page 54: ...bled if an intermittent fault is causing confusion A Normal path operates directly between a pair of transducers Alternatively select Reflected if the ultrasonic path goes via a reflector on the far side of the channel Path Length and Height must be entered on this screen The X factor is a multiplier normally 1 but may be different for special calibration reasons Angle to flow is for Normal paths ...

Page 55: ...eration for convenience during setting up The HT Drive is usually set to Manual for setting up in which case the Drive Voltage and Gain are set manually The effect of changing them is observed via the Waveform Capture Screen Once set up Auto Gain may be selected Shape Recognition is used to reject distorted signals It may be switched off for diagnostic purposes Click on Read Path Stats to view the...

Page 56: ...trasonic upward facing the Ultrasonic panel on the screen is enabled and must be completed in the same way as for the Velocity paths on the previous screen If the channel is closed and full the channel height is entered as Fixed Level If the Level is via an analogue input the mA Depth table may be entered If the relationship is linear it is only necessary to enter 2 values If it is non linear inte...

Page 57: ...s above datum The Sarasota 200 will interpolate between the entered values For channels with straight sides even if not vertical it is only necessary to enter 2 points the width at the bottom and at the top It is important to enter a width for a height greater than or equal to the maximum water level because the cross section area of the channel will only be calculated up to the highest defined wi...

Page 58: ...nst heights above datum The Sarasota 200 will interpolate between the entered values The usual reason for using a flow estimation table is when the water level can go below the minimum required for the lowest velocity path to operate It may also be used when all velocity transducers have failed for example when water becomes aerated under extreme storm conditions The relationship must be determine...

Page 59: ...200 A Save As screen will appear Enter a file name with a cfg type config and a PC location in which to store it Subsequently to view or print file Run GAFA off line Click on File on the Main screen Open the config file previously saved A1 4 4 Write Gauge Configuration Notes Click on Write An Open screen will appear Enter the name of the required cfg file and its location in the pc Write to the Sa...

Page 60: ...ervals will fill the memory in 210 days The Log Header shows the details of the highlighted Log page The Log Size indicates the number of record samples and the proportion of the page occupied by the highlighted Log Refresh Index causes the latest status of the selected Log to be displayed This will be changing if the Sarasota 200 is operating Clicking Collect Log brings up a Save As screen to all...

Page 61: ...onfiguration screen Select Halt Log to stop when the Log memory is full or Wrap Around for the most recent records to over write the oldest when full As an example 12 variables at 15 minute logging intervals will fill the memory in 210 days Select up to 12 Items for Logging Reset Log clears the log to allow a new one to be defined Autogain Stats may be logged for a path for diagnostic purposes If ...

Page 62: ...as not been recognised and a fault exists Once Fired the waveform will show the fire pulse at time zero and the receive pulse at a time equal to the time of flight TOF or transit time provided the sample period that has been selected is long enough If the selected path has not previously operated the default sample period is 256 microseconds and the delay zero These may be changed via the Timing b...

Page 63: ...ill appear which define the viewing area to be zoomed in to Click and drag the viewing lines Double click in the area between the viewing lines to zoom in It may be necessary to enter a longer Delay time in conjunction with zoom to avoid losing display resolution If the viewing conditions are set up on the Down Stream waveform click on the Up Stream box to replicate the conditions The blue vertica...

Page 64: ...o data may be written to it without the password having been entered Entering the password via the above screen allows unrestricted access for viewing and writing Once unrestricted access has been obtained the password may be changed via the Config Station System screen A1 4 1 1 Once unrestricted access has been obtained the above screen will not be displayed If the password becomes lost consult t...

Page 65: ...fined by the on off ratio For example for a 4 path flowmeter on 12 volt supply On time 2 minutes off time 13 minutes in a 15 minute cycle average current 0 051A A2 2 2 AC power adapter module Input Voltage 90 to 264 Volts AC AC Frequency 47 to 63 Hz Output Voltage 16 V DC The AC adapter should be connected to an AC power source via a 1A fused spur or plug A2 2 3 Internal battery option Internal ba...

Page 66: ...lays Fault relay Type change over NO NC Contact rating 0 3 A at 125 V AC or 1A 30 V DC Guaranteed operations 10 5 depends on load and voltage Relay 2 Type change over NO NC Contact rating 5 A at 250 V AC or 30 V DC Guaranteed operations 105 depends on load and voltage Relay 1 Type Solid State Relay For full spec and test conditions see IR data sheet PD10031C For connection options A B C see the di...

Page 67: ...FICATION Page A2 3 Thermo Fisher Scientific APPENDIX 2 SPECIFICATION Diagram of Solid State Relay connections PL13 3 PL13 2 PL13 1 Load AC or DC source A connection PL13 3 PL13 2 PL13 1 Load DC source B connection PL13 3 PL13 2 PL13 1 Load DC source C connection ...

Page 68: ...e standard Hazardous area use Alternative transducers plus barriers Transducer EEx ia IIB T4 20o C TA 40o C Barrier EEx ia IIB 20o C TA 40o C Consult Thermo Fisher Scientific A2 4 2 500 kHz Size 50 mm dia 75 mm length Frequency tolerance 2 Immersion pressure max 2 bar Operating temperature range 20o C to 50 o C Safe area use standard A2 4 3 Other frequencies Consult Thermo Fisher Scientific A2 4 4...

Page 69: ... channels measurement of discharge by the ultrasonic acoustic method This is identical to ISO6416 1992 E In the near future a revised dual numbered version will be published as BS ISO 6416 BS ISO 748 1997 Measurement of liquid flow in open channels velocity area methods This is identical to ISO 748 This includes check gauging by current metering The standard was formerly numbered as BS 3680 part 3...

Page 70: ...Sarasota 2000 Ultrasonic Multipath Flowmeter Appendix 3 REFERENCES Page A 2 Thermo Fisher Scientific APPENDIX 3 REFERENCES This page is blank ...

Page 71: ...omer reference Sales Order reference number Thermo Fisher Scientific site reference number A4 3 General description Number of paths Configuration Number and frequency of transducers Number and type of levels Number and type of outputs Power source Internal battery fitted Other comments A4 4 Software issue Software issue Date Special features A4 5 Cards fitted Part No Type Serial Number Address Com...

Page 72: ...ion method Output configuration Analogue output config n Test output config n Auxiliary input allocation Relay configuration Fault relay config n Other relays config n Relay U S path allocation Serial Port 1 PC config n Serial Port 2 Modem config n Power management Data logging Channel config n Level allocation Analogue input config n U S level config n Transducer setup level Waveform capture leve...

Page 73: ...ITE DATA BOOK A4 7 Schedule of drawings Drawings to be enclosed Drawing Number Title Issue Date A4 8 Test certificates Enclose the following as appropriate Type Certificate No Date Comment Declaration of conformances In house test schedules Safety certificates On site test schedules Calibration certificates Other ...

Page 74: ...Sarasota 200 Ultrasonic Multipath Flowmeter Appendix 4 SITE DATA Page A4 4 Thermo Fisher Scientific APPENDIX 4 SITE DATA BOOK This page is blank ...

Page 75: ...wer connections are isolated and precautions taken to prevent power being restored while work is taking place Hazardous area installations forbid the use of tools or equipment which could produce an explosion hazard by causing a spark or imposing excessive mechanical stress Each item must be installed in a manner to avoid exposure to thermal or mechanically induced stresses and in addition neither...

Page 76: ...Sarasota 200 Ultrasonic Multipath Flowmeter Appendix 5 I S Interface and Transducer Page A5 2 Thermo Fisher Scientific APPENDIX 5 This page is blank ...

Page 77: ...Thermo Fisher Scientific 81 Wyman Street P O Box 9046 Waltham Massachusetts 02454 9046 United States www thermofisher com ...

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