oiw-ex 1000 oil in water monitors - advanced sensors · v2 spectrometer 3rd ... this document...

OIW-EX 1000 - Spectrometer Handbook Code: OIW-HBO-0005 Version: EX-002 Date: 18 March 2010

Advanced Sensors Ltd, www.advancedsensors.co.uk Tel: +44(0)28 9332 8922. FAX +44(0)28 9332 8669 of 33

OIW-EX 1000 Oil in Water Monitors Spectrometer Handbook Document code: OIW-HBO-0005

Version: EX-002



Document History 1. Version A Draft..........First draft – separated from

installation and User Handbook 1st May 2007 2. Version B Draft..........Updated to reflect change to support the

v2 Spectrometer 3rd April 2009 3. Version C ...................Preface page updated 12th June 2009 4. Version 1....................First Release after Review 29th June 2009 5. Version 2....................Updated in-line with Version 4 of the

OIW software 19th Jan 2010



Preface This handbook is part of a library of handbooks that cover the full operation of the OIW-EX Series of products. The table below indicates the handbooks available. Please ensure that you have read all handbooks required for your job function. Note: please ensure you have the latest version of these documents – password protected copies of the documents together with a table of the latest revisions are available on-line at: http://www.advancedsensors.co.uk/downloads The passwords may be obtained directly from Advanced Sensors Ltd.

Handbooks Descriptions

Code Handbook Description OIW EX Model OIW-HBO

100

1000

1000

P

4000

0001 Installation Hardware related details required for the physical installation of the OIW-EX Series of units.

0002 User An overview of the operation of the OIW-EX Series of products and details how to configure the unit.

0003 Data Logging Information on how to access and examine the data log and system log files.

0004 Remote Access

How to control the OIW-EX Series of units remotely.

0005 Spectrometer Operation of the spectrometer and associated Spectrometer files.

0006 Wireless Controller

Set up and use of the handheld wireless controller. O O O O

0007 Flush Valve Operation of the OIW-EX Series of units when a Flush Valve is fitted. O O O

0008 Dual Flow Operation of the OIW-EX Series of units when used in a Dual Flow Mode. O O O

0009 Microscopy Operation of the OIW-EX Series of units with Microscopy files.

0010 Hart Operation of the OIW-EX Series of units with supporting Hart. O O O O

0011 In-Line Probe User

Operation of the OIW-EX Series of units with an In-Line Probe.

0012 In-Line Probe Installation

Installation of the OIW-EX Series of units with an In-Line Probe.

Key

= Required O = Optional



Table of Contents

1 OIW-EX 1000 - Spectrometer Handbook............................................................. 6 1.1 Introduction....................................................................................................6 1.2 Modes of Operation .......................................................................................6 1.3 Health & Safety..............................................................................................6

2 Spectrometer Overview ........................................................................................ 7 2.1 Identifying an OIW EX1000 Unit..................................................................8 2.2 Showing and Hiding the Spectrum ................................................................9 2.3 Spectrum Reading Cycle..............................................................................10 2.4 Spectra Control Options...............................................................................11

2.4.1 Spectrometer Standard Creation ..........................................................12 2.5 Spectrum Reading Cycle Explained ............................................................14

2.5.1 Measuring Cycles Spectrum Operation ...............................................14 2.5.2 PPM Level Triggered Spectrum Operation .........................................15 2.5.3 Manual Spectrum Operation ................................................................15

2.6 Spectrum Control Options ...........................................................................16 2.6.1 Spectrum Smoothing............................................................................16 2.6.2 Spectrum Averaging ............................................................................16 2.6.3 Spectrum Integration Time ..................................................................17

2.7 Spectrum Control Options ...........................................................................18 2.7.1 Water Status off/on ..............................................................................18 2.7.2 Changing % Mask Tolerance...............................................................19 2.7.3 Changing the Lower Wavelength ........................................................19 2.7.4 Changing the Upper Wavelength.........................................................20 2.7.5 Changing the Upper Wavelength.........................................................20 2.7.6 Changing the % Above Line................................................................21

2.8 Spectrum Log Files ......................................................................................22

3 Using SpAn......................................................................................................... 24 3.1 Starting SpAn...............................................................................................24 3.2 Loading a spectrum log File ........................................................................25 3.3 Auto Scaling.................................................................................................28 3.4 Identifying Points on the Graph...................................................................29 3.5 Saving/Loading Spectral Data File Sets ......................................................29 3.6 Printing.........................................................................................................31

4 Errors with EX1000 ............................................................................................ 32

5 Appendix 1 – OIW-EX Series Contact Details................................................... 33



Symbols in this document The following symbols are used in this document to indicate special information: Warning – an instruction that draws attention to the risk of injury or death. Caution – an instruction that draws attention to the risk of damage to the product, process or surroundings. Note – Clarification of an instruction or additional information. Information – Further reference for more detailed information or technical details.

NOTE: although Warning hazards are related to potential personal injury, and Caution hazards are associated with material damage, it must be understood that operation of damaged equipment could lead to personal injury or death. All Warning and Caution hazards must be complied with.



1 OIW-EX Series with Spectrometer fitted - Spectrometer Handbook

1.1 Introduction

This spectrometer handbook provides user information on how to use and configure the Advanced Sensors Ltd OIW-EX Series Oil in Water Monitor Systems spectrometer features only – for all other features please refer to the User Handbook. This manual relates to the functionality of the OIW-EX Series unit at software release v4 and above.

CAUTION: This manual describes the operation and use of the spectrometer features only NOT the installation. Ensure that the unit has been correctly installed in line with the Installation Handbook prior to use.

1.2 Modes of Operation

The OIW-EX Series have been designed with maximum flexibility in mind enabling them to be configured in a verity of ways to suit different customer requirements. CAUTION: Should the equipment be used in a manner not specified in this handbook the sensor may not function correctly and protection provided by the equipment may be impaired. CAUTION: No options should be altered without a full understanding of the change being made.

1.3 Health & Safety

WARNING: This document relates to electrical equipment of substantial weight. Health and Safety section of the Installation Handbook must be read carefully and understood before using this equipment. NOTE: although Warning hazards are related to personal injury, and Caution hazards are associated with material damage, it must be understood that operation of damaged equipment could lead to personal injury or death. Therefore all Warning and Caution hazards must be complied with.



2 Spectrometer Overview The OIW-EX Series fitted with a Spectrometer enhances the functionality of the standard unit by incorporating an optical spectrum analyser unit which allows for enhanced analyses of the produced water in the sample chamber. The following OIW-EX Series models all have Spectrometer fitted as standard:

• OIW-EX1000, • OIW-EX1000P and • OIW-EX4000.

Advanced Sensors software suite includes SpAn. The SpAn software tool simplifies the analysis of multiple optical scans. As with all data logs generated by the OIW-EX Series of products the spectrum analyser files are created in generates industry standard .csv file format allowing the user the flexibility to analyse the data in a tool of their choosing. The following sections will detail the operation of the spectrum analyser unit and will provide details on how to use the SpAn software – details will also be provided on the file format should the use wish to analyse the data with alternative tools.



2.1 Identifying an OIW EX Series Unit with a Spectrometer

The OIW-EX 100 software, see Figure 2, can be distinguished from the OIW-EX Series with Spectrometer fitted, see Figure 1, primarily by the software header box, which clearly identifies unit type in its header, shown below. The following OIW-EX Series models all have Spectrometer fitted as standard1:

• OIW-EX1000, • OIW-EX1000P and • OIW-EX4000.

Figure 1. OIW-EX100 software

Figure 2. OIW-EX1000 software

The following sections will detail the operation of the spectrum analyser unit and will provide details on how to use the SpAn software – details will also be provided on the file format should the use wish to analyse the data with alternative tools.

1 Though out the rest of this Handbook the term OIW-EX1000 is used; but this also covers all OIW-EX Series with a Spectrometer fitted; i.e. OIW-EX1000, OIW-EX1000P and OIW-EX4000.



2.2 Showing and Hiding the Spectrum

The graph panel of the OIW-EX 1000 software will allow you to switch between showing the oil ppm level, the spectrum of the oil or both, see Figure 3.

Figure 3. View of OIW EX1000 PPM/PPB and Spectrum

Clicking the “Spectra” button, see Figure 3 , when the oil ppm level is displayed, will display the Spectra screen on view, see Figure 3 . Clicking the “Hide” button, see Figure 3 , when Spectra view is displayed will display the oil ppm level, see Figure 3 . Clicking the button, see Figure 3 , when Spectra view is displayed will display the oil ppm level and the Spectra, see Figure 3 . Clicking the button, see Figure 3 , when the oil ppm level and Spectra are displayed will display just the oil ppm level, see Figure 3 .



2.3 Spectrum Reading Cycle

As with the oil detection system the spectrum analyser requires the laser light as an illumination source therefore the analyser will not operate when the measurement cycle is in the stopped position. The spectrum analyser can take a reading based on any one of three conditions:

• The OIW System software periodically requests a reading – based on a user selectable time period;

• The PPM level rises above the “User Set” trigger level; • The user manually requests a reading.

Each of these trigger conditions will be discussed in more detail below but the reading cycle remains the same for each condition. The user can have any combination of trigger conditions including all conditions at the same time i.e. the system can be set to trigger a reading every hour and trigger a reading if 100ppm is exceeded and select a manual reading. Note: only one reading will be taken at a time.



2.4 Spectra Control Options

The spectrum analyser controls can be accessed via the Oil Calibration Settings and Configuration Options tabs once you have logged in to the configuration menu, see Figure 4.

Figure 4. Spectrometer Controls

NOTE: if the spectrometer was not detected or if communications between the main OIW system and the spectrum analyser are lost the Take Spectra button is replaced with the word Fault.



2.4.1 Spectrometer Standard Creation Under the Oil Calibration Settings tab is an option to create a Spectrometer standard. Future Spectrometer reading may be compared with this standard and an alarm may be raised if the composition of the oil changes significantly.

Figure 5. Scheduled Auto Settings

As with the oil detection system the spectrum analyser requires the laser light as an illumination source therefore the analyser will not operate when the measurement cycle is in the stopped position.

2.4.1.1 What is a Spectrometer Standard

A Spectrum Standard is the “overall shape” of the Spectra that is typical of the oil passing though the OIW-EX Series Analyzer. Figure 7 show two spectra from oil samples, if Sample 1 was set as the Spectrometer Standard then an alarm can be raised when Sample 2 is encountered because its shape does not match the Spectrometer Standard.

Spectra From Two Oil Samples

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Figure 6. Spectra from Two Oil Samples



2.4.1.2 Spectrometer Standard Creation Process

Before you start to create a Spectrometer Standard you need to specify the number of Spectra you wish to form the Standard. This can be done with the Standard Size control. Once you are happy with the standard size a click on the Create Standard button will start the process; see Figure 7. The number of samples used to create the Standard means that the Standard is more representative of the overall shape of the samples passing though the analyzer. The default minimum of 5 will be fine in most cases. A new control Sample remaining until standard set will appear; this will be decremented each time a sample is taken; see Figure 8. Either leave for scheduled to run or to take a spectrometer standard just click the Take Spectra button; see Figure 9. Repeat this process until all samples have been taken, see Figure 11

Figure 7. Starting the Create Standard Process

Figure 8. Sample remaining until standard set

Figure 9. Take Spectra Button

Figure 10. Sample remaining until standard set decremented

Figure 11. Starting the Create Standard Process



2.5 Spectrum Reading Cycle Explained

As with the oil detection system the spectrum analyser requires the laser light as an illumination source therefore the analyser will not operate when the measurement cycle is in the stopped position. The spectrum analyser can take a reading based on any one of three conditions:

• The OIW System software periodically requests a reading – based on a user selectable time period;

• The PPM level rises above the “User Set” trigger level; • The user manually requests a reading.

Each of these trigger conditions will be discussed in more detail below but the reading cycle remains the same for each condition. The user can have any combination of trigger conditions including all conditions at the same time i.e. the system can be set to trigger a reading every hour and trigger a reading if 100ppm is exceeded and select a manual reading. Note: only one reading will be taken at a time.

2.5.1 Measuring Cycles Spectrum Operation The OIW EX-1000 can be set to take a spectrum analyser reading at regular Measuring Cycles throughout the day, see the User Handbook for OIW EX-100 for details about Measuring Cycles. To access this option navigate to the Configuration Options tab, click the Schedule button and select the Spectrometer tab on the Schedule Configuration window. You may change the frequency at which Spectra are taken by using the “Spectrometer reading taken every” XX “Measurement Cycles” control, Figure 12.

Figure 12. Scheduled Auto Settings



With the “Spectrometer reading taken every” XX “Measurement Cycles” set to 0; no Spectra will be taken based on Measuring Cycles. With “Spectrometer reading taken every” XX “Measurement Cycles” set to 1; a Spectra will be taken every time a Measuring Cycle Starts.

2.5.2 PPM Level Triggered Spectrum Operation The OIW EX-1000 can be set to take a spectrum analyser reading when the ppm reading exceeds a user set ppm level. To access this option navigate to the Configuration Options tab, click the Oil Type button and select the Spectrometer Settings tab on the Oil Type Configuration window, Figure 13. The Level Trigger Value allows any ppm level to be entered in the range 0 to 50000. If a value of 0 is entered ppm level spectrum readings will not be taken as a value of 0 (zero) disables this option.

Figure 13. Trigger Level Settings

2.5.3 Manual Spectrum Operation With the measurement cycle started the Take Spectra button will be active and can be selected at any time to trigger a spectrum analysis of the produced water at that time.



2.6 Spectrum Control Options

The spectrum analyser three parameters that control the quality of the Spectra: • Smoothing, • Averaging, and • Integration Time.

To access this option navigate to the Configuration Options tab, click the Schedule button and select the Spectrometer Settings tab on the Schedule Configuration window, see Figure 14.

Figure 14. Spectrum Control Options

2.6.1 Spectrum Smoothing Smoothing specifies the number of readings on either side of a particular reading to average across an entire spectral acquisition. This method averages a group of adjacent detector elements. A value of three, for example, averages each data point with three points (or bins) to its left and three points to its right. The greater this value, the smoother the data and the higher the signal-to-noise ratio. However, if the value entered is too high, a loss in spectral resolution results.

2.6.2 Spectrum Averaging Smoothing specifies the number of spectra to average for the specified spectra output. A higher value for this parameter provides a better signal-to-noise (S:N) ratio.



2.6.3 Spectrum Integration Time Integration Time specifies the length of the spectral acquisition in milliseconds for the spectrometer. The integration time of the spectrometer is analogous to the shutter speed of a camera. The higher the value specified for the integration time, the longer the detector "looks" at the incoming laser light. The three integration times relate to the different integration time available to avoid clip the signal. If IT1was set to 600ms, IT2 was set to 300ms and IT3 set to 200ms. The OIW EX 1000 software would take a Spectra using IT1 and check for Spectral clipping. If Spectral clipping occurred with IT1 then the OIW EX 1000 software would take a Spectra using IT2 and check for Spectral clipping. If Spectral clipping occurred with IT2 the OIW EX 1000 software would take a Spectra using IT3.

Example of Different Integration Times

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IT1 = 600ms

IT2 = 300ms

IT3 = 200ms

Figure 15. Spectral Clipping and Integration Times

If IT1, IT2 and IT3 are set to the same value then the OIW EX 1000 software does not attempt to resolve Spectral clipping.



2.7 Spectrum Control Options

The spectrum analyser has three parameters that control the quality of the Spectra: • Smoothing, • Averaging, and • Integration Time.

To access this option navigate to the Configuration Options tab, click the Schedule button and select the Spectrometer Mask Settings tab on the Schedule Configuration window, see Figure 16.


2.7.1 Water Status off/on

Water Status Alarm off

Water Status Alarm on




2.7.2 Changing % Mask Tolerance

Figure 18. Changing the % Mask Tolerance

2.7.3 Changing the Lower Wavelength

Figure 19. Changing the Lower Wavelength



2.7.4 Changing the Upper Wavelength

Figure 20. Changing the Upper Wavelength

2.7.5 Changing the Upper Wavelength




2.7.6 Changing the % Above Line




2.8 Spectrum Log Files

The Spectrum logs can be found in a folder named Spec_Logs within the OIWLogs folder as detail in the Data Logging Handbook – please refer to that handbook for details of how to access the logs. Each spectrum data log has a unique file name as shown in the example below, Figure 23.

Figure 23. Spectrum Data Logs Folder



The file “SN00375-05_Mar_09-08_07_58_Thu_OIW_Spectra_DATA_31.3ppm.csv” may be used to show the filename format,

SN00375-05_Mar_09-08_07_58_Thu_OIW_Spectra_DATA_31.3ppm.csv The serial number of the OIW unit, in this example SN000375 SN00375-05_Mar_09-08_07_58_Thu_OIW_Spectra_DATA_31.3ppm.csv The date the spectra was taken, in this example 5th March 2009 SN00375-05_Mar_09-08_07_58_Thu_OIW_Spectra_DATA_31.3ppm.csv The time the spectra was taken, in this example 08:07:58 SN00375-05_Mar_09-08_07_58_Thu_OIW_Spectra_DATA_31.3ppm.csv The day of the week the spectra was taken, in this example Thursday SN00375-05_Mar_09-08_07_58_Thu_OIW_Spectra_DATA_31.3ppm.csv The type of OIW file, in this example Spectra Data for an Oil-in-Water

sensors SN00375-05_Mar_09-08_07_58_Thu_OIW_Spectra_DATA_31.3ppm.csv The measured value when the spectra was taken, in this example 31.3

parts per million SN00375-05_Mar_09-08_07_58_Thu_OIW_Spectra_DATA_31.3ppm.csv The type of the file. As with all of the OIW data logs the spectrum data

logs are text based files output in .csv format (comma separated values). This means that they can be opened in a plain text editor such as Notepad (included with Windows) or more sophisticated mathematical analysis tools such as Microsoft’s Excel application, see Figure 24.

Figure 24. Spectrum Data Log File Opened in Excel

The format of the spectrum data log is as follows: The first line is a header line show the oil ppm level in the water at the time the Spectra was taken and measurement limit. The second line is a header line to identify the two columns that follow. In addition this line holds some status information about the spectrum reading which is for Advanced Sensors Ltd use only. The remaining lines list the wavelength and relative light level reading, as partially shown in Figure 24 above.



3 Using SpAn SpAn (Spectrum Analyser) is Advanced Sensors software tool used to view the Spec log files. Note: as mention previously the files can be view with a variety of tools such as NotePad and analysis can be done in programs like Microsoft’s Excel program.

3.1 Starting SpAn

To start SpAn simply locate the SpAn icon on the desktop, shown below, Figure 25. Once the software has started the screen will be as shown, Figure 26.

Figure 25. SpAn Icon

Figure 26. Startup Screen



3.2 Loading a spectrum log File

To load a file select the button marked Click to Load Data highlighted in red, just below the centre of the screen, Figure 27 . When this is clicked a standard Windows load dialogue box will appear. Simply navigate to the data directory and select a data log file, as shown below, Figure 27 .

Figure 27. Loading a Spectrum Data File



When the file loads the red button will change to display the filename it has loaded (Figure 28 ) and the data within that file will be displayed in the graph area (Figure 28 ). In addition the Hide buttons option will be enabled (Figure 28 ) (prior to loading a file this option was disabled, as seen above Figure 27), and the next button in line (blue button (Figure 28 )) will also become enabled.

Figure 28. File Loaded



Once the second (blue) button has been enable the process can be repeated to load a second file into SpAn – and in turn the third (green) button will be enabled, allowing the user to load a third file etc. – up to six files can be loaded simultaneously into SpAn for analysis and comparison. Figure 29 below, shows two spectrum data loaded into SpAn. The colour of each line on the graph corresponds with the colour of the file name on the Load button.

Figure 29. Multiple Data Files Loaded



3.3 Auto Scaling

When a file is loaded the graph is drawn such that it fills the graph area, as was shown in Figure 27 above. If a second graph (or subsequent graph) is loaded which is larger than the previous graph then the graph scale will adjust to fill the graph area with the largest graph, as seen in. Figure 29 above – note how the blue line has been scaled to fill the graph area and the red line has been reduced to proportionately compare against the blue line. If the user wishes to see the red line fill the screen then they can hide all larger graph lines by selecting their Hide button’s – as can be seen in Figure 30 below. Notice how the blue Hide button has changed to read Unhide to highlight that a graph has been loaded, but has been hidden.

Figure 30. Using the Hide Button



3.4 Identifying Points on the Graph

To identify a point on the graph the user can select a point on the graph by clicking the mouse pointer any where on the graph page, see below Figure 31 . Doing this will update the display area at the top of the SpAn screen Figure 31 to identify the Wavelength (x – axis) and the Light Intensity (y-axis).

Figure 31. Selecting points on the Graph

3.5 Saving/Loading Spectral Data File Sets

To aid quick recall of a reading or set of readings once loaded the user can save the filename set this can be done by selecting File Save (or by pressing CTRL S), as shown below (Figure 32 ). This will bring up a standard Windows Save As window. The user can navigate to an area of their choice and enter a file name that best describes the file set, shown in Figure 32 . Once saved the file set name will be displayed at the bottom of the screen, Figure 32 , where previously No File Loaded was displayed.

Figure 32. Saving a File Set



Once a file set has been saved it can be loaded back into SpAn by selecting the File Load from the top tool bar, see Figure 33, or by pressing CTRL L. This will bring up standard windows Open window and will list all file set filenames previous store, as shown below, Figure 34. Selecting a file set name and clicking on the Open button will re-display the set of spectrum files previously saved.

Figure 33. Loading a File Set

Figure 34. Loading a File Set



3.6 Printing

The SpAn graph area can be output to a printer by selecting the File Print from the top tool bar, see Figure 35, or by pressing CTRL P. This will bring up a standard windows print menu where the user can select the printer and adjust printer options. In addition to this option there are two other options Print Setup and Print Preview – these are standard windows settings which allows the user to adjust various aspects of the printout.

Figure 35. Print Options



4 Errors with EX1000 When the unit is started the OIW software will look for the presence of the spectrum analyser. If the device is not found then a message box will appear highlighting that a Spectrometer was not found, see Figure 36, and a system log message will be logged. Should this ever happen, please contract your Advanced Sensors agent or Advanced Sensors directly.

Figure 36. Could not find spectrometer.



5 Appendix 1 – OIW-EX Series Contact Details Customer Liaison Sales & Marketing Tel. +44(0)28 93 35 64 63 E-Mail: [email protected] Advanced Sensors Headquarters Advanced Sensors Ltd 8 Meadowbank Road Carrickfergus BT38 8YF UK Tel: +44 (0)28 93 32 89 22 Fax: +44 (0)28 93 32 86 69

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