AS281002 SubMk2P-S Sample Pump User Manual
Contents
1. CAL fe Lt Calibrate Oxygen Sensor High Point cnt H Calibrate Carbon Dioxide Sensor Zero CHL 0820 Calibrate Carbon Dioxide Sensor Span CAL 0085 Calibrate Pressure Sensor Low Point CAL Pe Li Calibrate Pressure Sensor High Point CAL H Calibrate Temperature Sensor Low Point CAL L Calibrate Temperature Sensor High Point CAL HI Select Factory Default Settings CAL FACE When the desired option has been selected press ENTER Alternatively press CANCEL to return to normal operation Pressing ENTER will cause the instrument to request the user to specify calibration data Refer to the appropriate section below for further details The battery condition display will then show the value of the calibration parameter and the user can adjust the value using the UP and DOWN keys Pressing CANCEL will abort the calibration and pressing ENTER will request the calibration to be performed Before performing the calibration the instrument will require confirmation Initially the word no will appear on the Battery Condition display This must be changed to yes by pressing UP or DOWN and then confirmed by pressing ENTER This instructs the calibration to be performed Pressing ENTER while the display shows pressing CANCEL at any time will prevent the calibration from taking place Once entering the calibration menu feature if no switches2. EESE EEan EEEE NEESS 11 6 3 CARBON DIOXIDE SENSOR CALIBRATION 00 253 scssscsssescssenscesscessnscsednocecscecsebcstenseeseccassscstcnccecsscscssesees 14 6 4 PRESSURE SENSOR CALIBRATION 2 52 soserses suvevbehanserect sebvertevdvesdtuseberbdnateerdlac bert suneverdanssvevtebcorereeseeves eds 14 6 5 TEMPERATURE SENSOR CALIBRATION saeeinesvaeecbstadecanesaeeebedoasecbessaeesbessacees 17 6 6 SELECT FACTORY DEFAULT SETTINGS 20 7 DATA LOGGING ccscssicccescececccccsiceccassxcccteusscesescsicceteveiecdeaseiecetevescesesssscceveveiecsessazcestens 21 Tel INSTALLATION OF DATA LOGGING SOFTWARE ON A 21 7 2 DATA LOGGING PROGRAMME 23 7 3 DATA LOGGING sondeeguseadeeebscatedcnsesdedcesesusecacessegeeccausees 23 7 4 DATA LOGGING RETRIEVAL DATA 4 seuasdeseadeacs saansideseadeded E Ea AEAEE S 25 7 5 DATA LOGGING DATA 26 8 MAINTENANCE cescsiscccvsccstccstccscccecscclccsiscscccdecsel cecesssdscceccescescscocscsvecesccetccscseseecencedeszocses 27 9 SPECIBICATION ciscssccicdscccccccciccccceccccsedecisectedecoececteiocccctscoesedecdoecdsdecoeseedscocccstccoesedecdoeccs 29 Analox SubMk II P User Manual AS2 810 02 October 2007 2 ANALOX SUB MK II P 1 PACKAGING CONTENTS CHECK a Analox Sub Mk II P S main uni
3. External position Either an external supply or batteries must be installed in order for the unit to operate If the unit does not turn on perform the following checks a check that either the external power supply or batteries are healthy b check that the fuses in the external supply line or the battery circuit are not blown The fuses are located beside the batteries internally On powering up the instrument the sensor readings may take a short time to settle particularly the sensor which can take about 40 seconds to warm up During this period it is quite normal to observe erroneous sensor readings Sensor readings are updated approximately every two seconds The choice of measurement units for each parameter are defined at the time of order and are factory set Oxygen readings are displayed in either ppATS partial pressure in atmospheres mBar pp millibar partial pressure or as a percentage Analox SubMk II P User Manual AS2 810 02 October 2007 5 ANALOX SUB MK II P readings are displayed in SEV percent surface equivalent or ppmSEV parts per million surface equivalent Depth readings are displayed in either MSW metres of sea water or FSW feet sea water Temperature readings are displayed in either C Centigrade or F Fahrenheit The battery condition indicator provides an estimate of the number of hours battery life remaining The actual battery life achieved can be heavily in
4. 1 Subject the entire instrument to steady known temperature of between 32 and 70 F for example let us assume it is 60 F 2 Ensure that the instrument reading is steady 3 Enter calibration mode by pressing all 4 push buttons momentarily 4 Select Cal Tp L Calibrate Temperature Low by pressing UP DOWN 5 Press ENTER 6 Press UP DOWN until the display reads 60 0 or as appropriate value for actual temperature 7 Press ENTER 8 Press UP to change no to yes 9 Press ENTER 10 Observe after a few seconds that the instrument readout changes to the correct value it may not have been wrong before 11 Now subject the entire instrument to a steady known temperature of between 75 and 140 F for example let us assume it is 85 F 12 Ensure that the instrument reading is steady 13 Enter calibration mode by pressing all 4 push buttons momentarily 14 Select Cal Tp H by pressing UP DOWN 15 Press ENTER 16 Press UP DOWN until the display reads 85 0 or as appropriate for actual temperature 17 Press ENTER 18 Press UP to change no to yes 19 Press ENTER 20 Observe after a few seconds that the instrument readout changes to the correct value it may not have been wrong before 21 Subject the instrument to varying temperatures and confirm the correct temperature reading Analox SubMk II P User Manual AS2 810 02 October 2007 19 ANALOX SUB MK II P 6 6 Select Factory Default Settings It is possible by the incorrect usa
5. Analox 9100 9212 9HSUB oxygen sensor with 2 3 year life at 0 21 Bar ppO gt Range 0 2000 mBar or 0 2 000 ppATS Accuracy lt 1 of reading Pressure Sensor Analox solid state bridge sensor Range 0 90 MSW or 0 300 FSW Accuracy lt 0 5 of range Sensor Analox BLS low power long life infra red sensor with microprocessor applied pressure compensation Range 0 25000 ppmSEV displayed as 2500 x10ppmSEV Accuracy 5 of range i e 1250ppmSEVCOz2 when 0 8 lt ambient pressure lt 4 Bar Absolute and 0 lt ambient lt 20mbar Otherwise 10 of range i e 2500 Inlet Port 6mm OD push fit connection Outlet Port Analox waterproof valve and anti blockage device Operating Temperature 0 C to 40 C compensated Storage Temperature 5 C to 50 C Dimensions 235 190 x 110 mm Weight 2 2kg with batteries installed Analox SubMk II P User Manual AS2 810 02 October 2007 29
6. Chart or press the small Chart Icon on the toolbar if you have one 8 Under Chart Type choose XY scatter and under Chart Sub Type choose the type of lines that you wish on the chart Hint Use Scatter with data points connected by lines 9 Now press Finish or choose Next if you wish to refine the appearance of the graph 10 A graph will appear on the screen with the x axis showing the date and time and the y axis showing the CO2 reading 11 The basic appearance of the graph can now be edited but to do so requires familiarity with Microsoft Excel There are several books available at almost any computer store on this subject Analox SubMk II P User Manual AS2 810 02 October 2007 26 ANALOX SUB MK II P MAINTENANCE Maintenance consists of the following tasks FREQUENCY Daily Check that the instrument is maintained in a clean state In particular ensure that the gas inlet port gas outlet port and the breather port are unobstructed When necessary clean the instrument with a dampened cloth Check the battery condition indicator Change the batteries when the indicator is near to zero Six Monthly Replace the inlet filter Check the accuracy of the readings by subjecting the instrument to calibration gas a known pressure reference and a known temperature reference If necessary recalibrate the instrument as detailed in Section 6 Annually Where the instrument is u
7. Insert the new batteries taking care to observe the polarity markings on each of the battery holders and ensuring that the battery is retained by the clips in the holder e refasten the velcro retaining straps to prevent the batteries becoming dislodged from their holders inadvertently f close the lid of the instrument and secure in place with the two catches 4 2 Backup Batteries The instrument is also fitted with 2 additional LR43 Alkaline Manganese cells to maintain the Real Time Clock within the instrument The Real Time Clock is used to calculate the elapsed time and for instruments with the datalogging option These cells are mounted on the main printed circuit board on the underside of the lid The batteries should be replaced at 5 year intervals Observe the polarity markings on the cell holders positive uppermost The instrument will operate without these batteries fitted although the Datalogging function will cease to operate Analox SubMk II P User Manual AS2 810 02 October 2007 7 ANALOX SUB MK II P a CONNECTING AN EXTERNAL SUPPLY The external power lead supplied with the instrument terminates in a female screw locking connector that attaches to the mating connector on the left hand side of the unit this connector is protected by a dust cap that must be unscrewed prior to attaching the external supply lead The other end of the cable is presented as stripped ends for the customer to connect a suitable plug of
8. take the instrument into a pressure environment Subject the oxygen sensor to calibration air 13 Wait for the instrument reading to settle allow approximately one minute 14 Enter calibration mode by pressing all 4 push buttons momentarily 15 Select Cal 2 by pressing UP DOWN 16 Press ENTER 17 Press UP DOWN until the display reads 20 9 or as appropriate for the gas used this is the percentage concentration of oxygen in the calibration gas 18 Press ENTER 19 Press UP to change no to yes 20 Press ENTER 21 Observe after few seconds that the instrument readout changes to the correct value it may not have been wrong before 22 Monitor the oxygen readout as the pressure is reduced back to atmospheric pressure and confirm that the sensor is working correctly Analox SubMk II P User Manual AS2 810 02 October 2007 13 ANALOX SUB MK II P 6 3 Carbon Dioxide Sensor Calibration The carbon dioxide sensor works using an infra red absorption technique It generates maximum signal when exposed to zero COz and minimum signal when exposed to span CO2 The microprocessor analyses this signal and applies temperature compensation linearisation and depth compensation as required Two calibration points are provided The first point must always be at zero CO2 The second point should be at around half of the instruments full scale ie for a 25000ppmSEV instrument use of 1 5 at atmospheric pressure is ideal The calib
9. the display which are typically Metres of Sea Water MSW or Feet Sea Water FSW The calibration parameters are defined as the Absolute Pressure in BarA at the time of calibration eg 1 00 and 10 00 BarA for instance Ideally the calibration points should be near to the lower and upper ends of the pressure range The actual range of the sensor is 0 10 00 Bar Abs The Low point calibration is expected to be performed between 0 and 1 5 BarAbs The most convenient point will typically be atmospheric pressure The High point calibration is expected to be performed in the upper half of the pressure sensor range ie 5 10 Bar Absolute The conversion factors used for converting pressure in Bar Absolute to depth in MSW or FSW are as follows Pressure in Bar Absolute is first converted to Bar Gauge by subtracting 1 00 Bar Absolute from the sensor reading This results in a Bar Gauge sensor reading in the range 1 00 to 9 00 BarG The Bar Gauge reading is then either multiplied by 10 0 to arrive at a reading of 10 0 to 90 0 MSW or multiplied by 32 8083 to arrive at a reading of 30 0 to 300 0 FSW Analox SubMk II P User Manual AS2 810 02 October 2007 15 ANALOX SUB MK II P EXAMPLE 1 CALIBRATION OF DEPTH SENSOR AT NORMAL ATMOSPHERIC PRESSURE AND AT 5 0 Bar Absolute 1 With the instrument at normal atmospheric pressure determine from a reference standard the
10. the enclosure physically underneath the external power switch on the front panel 3 Pull the flow adaptor and the inlet and outlet sample lines from the oxygen sensor inlet 4 Ensure the instrument is switched off Disconnect the ribbon cable from the enclosure base connector 5 Unscrew the knurled ring retaining the oxygen sensor 6 Remove the old oxygen sensor 7 Disconnect the oxygen sensor from it s printed circuit board connector 8 Insert the new oxygen sensor and refit the knurled retaining ring 9 Connect the oxygen sensor to the printed circuit board connector marked JP3 Oxygen Sensor 10 Connect the ribbon cable connector 11 Refit the flow adaptor 12 Close the lid switch back on 13 Calibrate the oxygen sensor refer Section 6 2 Analox SubMk II P User Manual AS2 810 02 October 2007 28 ANALOX SUB MK II P 9 SPECIFICATION Power Source External DC supply 9 40V DC with regulation of better than 300mV Batteries 4 x D size alkaline cells for power 2 x LR43 Alkaline Manganese cells for real time clock backup Fuses Individual fuses for the two supply sources fuses 1A T Display Panel 6 x 4 character LCD displays character size 8mm x 5mm Oxygen carbon dioxide depth temperature pump status and battery condition Operator controls 4x Pushbuttons for calibration and display backlight control Backlight times out after 15 seconds when turned on Oxygen Sensors
11. this is the percentage concentration of oxygen in the calibration gas 18 Press ENTER 19 Press UP to change no to yes 20 Press ENTER 21 Observe after a few seconds that the instrument readout changes to the correct value it may not have been wrong before 22 Re subject the sensor to each of the test gases in turn to confirm that the sensor is working correctly Analox SubMk II P User Manual AS2 810 02 October 2007 12 ANALOX SUB MK II P EXAMPLE 2 CALIBRATION OF OXYGEN SENSOR USING CALIBRATION AIR AND VARYING THE DEPTH 1 Prior to proceeding ensure that the depth pressure readout of the instrument is within specification 2 At atmospheric pressure subject the oxygen sensor to calibration air 3 Wait for the instrument reading to settle allow approximately one minute 4 Enter calibration mode by pressing all 4 push buttons momentarily 5 Select Cal O2 L by pressing UP DOWN 6 Press ENTER 7 Press UP DOWN until the display reads 20 9 or appropriate value for the calibration air this is the percentage concentration of oxygen in the calibration gas 8 Press ENTER 9 Press UP to change no to yes 10 Press ENTER 11 Observe after a few seconds that the instrument readout changes to the correct value it may not have been wrong before 12 Now alter the depth experienced by the instrument to between 5 and 9 BarAbs ie
12. 07 16 ANALOX SUB MK II P 6 5 Temperature Sensor Calibration The Temperature sensor is a thermistor which changes its resistance with temperature The sensor is mounted in the gas entry port to the sensor Two calibration points are provided The instrument calculates the temperature by linear interpolation between the calibration points It then converts the depth to the units used on the display which are either Degrees Centigrade or Fahrenheit The calibration parameters are defined as the temperature in Centigrade or Fahrenheit at the time of calibration eg 10 0 and 30 0 C or 50 0 and 90 0 F for instance Ideally the calibration points should be near to the lower and upper ends of the normal operating temperature range The actual range of the sensor 15 0 60 or 32 140 0 The Low point calibration is expected to be performed between 0 and 70 Centigrade or Fahrenheit The High point calibration is expected to be performed between 25 and 140 Centigrade or Fahrenheit These ranges allow the user to convert the range from Centigrade to Fahrenheit if necessary The preferred ranges for each calibration points are given in the examples below Analox SubMk II P User Manual AS2 810 02 October 2007 17 ANALOX SUB MK II P EXAMPLE 1 CALIBRATION OF TEMPERATURE SENSOR IN DEGREES CENTIGRADE 1 Subject the entire instrument to a steady known temperature
13. ANALOX SUB MK II P ANALOX SUB Mk II P S OXYGEN AND CARBON DIOXIDE MONITOR WITH AUTOMATIC PRESSURE COMPENSATION USER INSTRUCTION MANUAL ANALOX SENSOR TECHNOLOGY 15 ELLERBECK COURT STOKESLEY BUSINESS PARK STOKESLEY NORTH YORKSHIRE TS9 SPT UK Tel 44 0 1642 711400 Fax 44 0 1642 713900 Web www analox net Analox SubMk II P User Manual AS2 810 02 October 2007 ANALOX SUB MK II P LIST OF CONTENTS 1 PACKAGING CONTENTS CHECK 3 Z INTRODUCTION iisaveccscscncesscccscccsecescesscccacteseccscescecescdosedea cess ccssccossececeosseccscosesesceescesaccesees 4 3 OPERATION 22 cectcncs echececaceecasececnades atobe 5 4 INSTALLING BATTERIES wrccsucsscesscccdacececcacceccecacceceesacceccegacceseccaceeccccsscesescsaceccceesceceseses 7 4 1 2 st caus 7 4 2 EE TEE EA 7 5 CONNECTING AN EXTERNAL SUPPLY 0 ccccccscscscscscccccccccccscscsescscscsescsescseeers 8 6 CALIBRATION cisvscsiccccccccccccccccscscstscsccctecaceccceccsescsiscseccetscsececesicecestseseocticcoeccedecoesetescsecceve 9 6 1 USE OF CALIBRATION GAS eaea EE EE 10 6 2 OXYGEN SENSOR CALIBRATION
14. actual atmospheric pressure in Bar Absolute for example let us assume it is 1 02 Bar Absolute 1020 mBar 2 Ensure that the instrument reading is steady 3 Enter calibration mode by pressing all 4 push buttons momentarily 4 Select Cal Pr L Calibrate Pressure Low by pressing UP DOWN 5 Press ENTER 6 Press UP DOWN until the display reads 1 02 or appropriate value for actual atmospheric pressure Note this number is assumed to be Bar Absolute 7 Press ENTER 8 Press UP to change no to yes 9 10 Observe after a few seconds that the instrument readout changes to the correct value it may not have been wrong before 11 Now subject the instrument to a known pressure of between 5 10 Bar Abs in pressure chamber 12 Ensure that the instrument reading is steady 13 Enter calibration mode by pressing all 4 push buttons momentarily 14 Select Cal Pr H by pressing UP DOWN 15 Press ENTER 16 Press UP DOWN until the display reads 5 00 or as appropriate for the pressure attained Note this number is assumed to be Bar Absolute 17 Press ENTER 18 Press UP to change no to yes 19 Press ENTER 20 Observe after a few seconds that the instrument readout changes to the correct value it may not have been wrong before 21 Subject the instrument to varying pressures and confirm the correct depth reading in either MSW or FSW depending on instrument version Analox SubMk II P User Manual AS2 810 02 October 20
15. ange no to yes 18 Press ENTER 19 Observe after a few seconds that the instrument readout changes to the correct value it may not have been wrong before 20 Re subject the sensor to each of the test gases in turn to confirm that the sensor is working correctly Special calibration mode Note that the Sub 5 has been specially adapted to allow span calibration at very low CO2 concentrations The span gas can be reduced to a minimum value of 0 05 This is to facilitate testing of very low levels of such as when monitoring breathing gas supplies It is intended that the instrument can be calibrated if necessary from typically 1000ppm so the span gas would be defined as 0 10 Analox SubMk II P User Manual AS2 810 02 October 2007 14 ANALOX SUB MK II P Note that after using this feature the sensor should be recalibrated on 1 50 prior to monitoring higher gas concentrations 6 4 Pressure Sensor Calibration The Pressure sensor provides a varying millivolt output proportional to the absolute pressure experienced by the instrument The pressure sensor is mounted inside the instrument but there is a Breather Port that allows the pressure inside the instrument to equalise with the external pressure Two calibration points are provided The instrument calculates the pressure linear interpolation between the calibration points It then converts the depth to the units used on
16. are pressed for a period of approximately 2 minutes the instrument will return automatically to normal operation The description above is illustrated in Figure 3 Analox SubMk II P User Manual AS2 810 02 October 2007 9 ANALOX SUB MK II P 0 9 lu 1 OPERATION gt EM Ge 1 L Leos gt L na uP ENT R ENT R DOWN EAR Ge H DOWN 1 Down lt CAL Coed I I CALIBRATION CAL E025 5 Sp CAL Pr L CAL Pr H CAL tP L CAL H CAL FALE CANCEL CANCEL CANCEL Figure 3 Operation of Pushbuttons during Calibration 6 1 Use Of Calibration Gas The following sections require the use of calibration gas to calibrate the sensor The instrument has been designed to allow the use of a wide range of calibration gases from various suppliers The instrument is designed to pump a sample from the ambient atmosphere A breather port ensures that the instrument is at the same pressure as ambient Under no circumstances connect pressurised gas to the sensor inlet without an external regulation device For calibration purposes use calibration gas bottles with either a flow regulator or a pressure regulator and an external in line flow meter Sample flow rates of 0 2 1 0 litres per minute are ideal for
17. calibration Analox SubMk II P User Manual AS2 810 02 October 2007 10 ANALOX SUB MK II P 6 2 Oxygen Sensor Calibration The oxygen sensor provides a varying millivolt output proportional to the partial pressure of oxygen Two calibration points are provided The instrument calculates the oxygen concentration by linear interpolation between the calibration points The calibration parameters are defined as the Percentage of oxygen in the calibration gas eg 20 9 or 100 0 for instance The instrument determines from the present value of depth what the expected partial pressure of oxygen should be It is important that the accuracy of the depth measurement is correct before performing oxygen calibration Similarly for instruments displaying oxygen as a percentage value the pressure sensor reading is used to calculate the percentage value from the measured partial pressure Ideally the calibration points should be near to the lower and upper ends of the oxygen range The actual range of the oxygen sensor is 0 2000mBar ppO2 The Low point calibration is expected to be performed using either nitrogen or calibration air With nitrogen the calibration can be performed at any depth whereas with air the calibration would be best at around Bar Absolute The High point calibration is expected to be performed using 100 Oxygen at between 1 and 2 Bar Absolute An alternative arrangement would be to use the calibration air used for the Low poin
18. ember the filenames that you have used previously Initially the default will be c My Documents 0Analox00 If you choose to retain this format the programme will automatically suggest the next number 0Analox01 OAnalox02 etc for future files The 0 at the start is meant to signify which instrument you are transferring data from if using multiple instruments 9 You will then be asked if you want to delete the data already in the instrument Answer Yes or No as appropriate Answering Yes will avoid retrieving the same data again at a future date You will then be asked when you want logging to commence click Start Immediately or Start at next Power Up as appropriate You may choose not to discard the data until you have inspected the data for correctness and click No This will leave the data shown in the Memory Status You can then use the Discard the Data From the Instrument button to delete the data at your own discretion You will need to reactivate the logging by clicking the Restart logging button 10 If you are retrieving data from a number of instruments connect the PC to the next instrument and press the New Instrument button Retrieve the data as explained in steps 5 to 9 Analox SubMk II P User Manual AS2 810 02 October 2007 25 ANALOX SUB MK II P IS Data Logging Data Analysis Microsoft Excel is not provided with the Analox system If you do not have a copy of Microsoft Excel other spreads
19. estart the pump simply press the ENTER switch The pump will start up and run for a few seconds If sample flow is obtained the pump will continue to run If no sample flow is detected the pump will switch off again Whenever the pump is in the off state the internal audible sounder will bleep to warn the user to investigate the problem Analox SubMk II P User Manual AS2 810 02 October 2007 6 ANALOX SUB MK II P 4 INSTALLING BATTERIES 4 1 Main Batteries The instrument is fitted with four D size 1 5v alkaline cells Although the instrument will operate from other types of D size battery their use is not recommended The operating life using batteries such as zinc chloride or nickel cadmium will be significantly less than with alkaline Batteries with cell voltages in excess of 1 5v must not be fitted With new batteries fitted the Battery Status will indicate 50 representing an estimated endurance of 50 hours The life of the batteries will be influenced by how often the backlight is used With frequent use of the backlight the instrument may operate for less time than estimated To replace the batteries a in dry conditions to prevent damage open the lid of the instrument using the two catches beside the handle b undo the two velcro retaining straps around the batteries ease each battery from its clips use one hand to grip the battery the other hand to apply a little pressure to release the clips d
20. fluenced by temperature This is intended as an approximate guide only When the reading reaches zero the internal audible sounder will pulse to warn the user that the batteries are low The instrument readings will remain accurate until the batteries are exhausted Battery State 0 The brightness of the backlights will fade as the batteries discharge When the Battery Status indicator reaches 0 hours new batteries should be inserted at the earliest opportunity The battery condition indicator will show E pr to indicate that the instrument is operating from the External Power input The backlight is turned on by momentarily pressing the ENTER pushbutton on the front of the instrument The backlight will turn off automatically after a short period A flashing indicator is built into the backlight switch to show that the instrument is operating This can also be used to locate the backlight switch in dark conditions A small sample pump is fitted inside the instrument to pull samples of gas through the gas inlet port An internal flow switch indicates to the instrument that a sample is being obtained The Pump Status indicator will show the following a on indicates the pump is running and there is a sample flow detected noFL indicates that the pump is running but that no flow has been detected off indicates that the pump has been turned off because no sample flow could be detected for a chort time period To r
21. ge of the calibration features to render the instrument virtually unusable The situation can be recovered by exercising the calibration options correctly It may be beneficial to a technician who is experiencing problems to be able to switch to the original factory default configuration Each of the sensors may then also require calibration but the readings displayed by the instrument should make sense To select Factory Default settings proceed as follows EXAMPLE 1 RESTORING FACTORY DEFAULT SETTINGS 1 Enter calibration mode by pressing all 4 push buttons momentarily 2 Select Cal Fact Cal Factory Defaults by pressing UP DOWN 3 Press ENTER 4 Press UP to change no to yes 5 Press ENTER 6 Test the performance of each sensor and recalibrate as required Analox SubMk II P User Manual AS2 810 02 October 2007 20 ANALOX SUB MK II P 7 DATA LOGGING The data logging option allows the ANALOX SUB to record up to approximately 3500 sensor readings and to output the stored data to a computer for analysis purposes An Analox utility installed on the computer allows the instrument to be configured to store any combination of oxygen carbon dioxide depth or temperature at selected time intervals varying from 10 seconds to 30 minutes The user could for instance opt to record just the carbon dioxide reading at 30 minute intervals In this case 3500 readings will provide an endurance of appr
22. heets will also allow access to the data These instructions are limited however to the use of Excel You may choose to access the data in a variety of ways either via Excel or Windows Explorer These instructions are based on loading the file from Excel 1 Start Microsoft Excel from your Start Menu or from your desktop 2 Select File Open and then navigate to the folder in which you chose to store the data file e g in c My Documents 3 Select files of Type Text Files All of the CSV files in the chosen folder will appear Click on the file that you wish to inspect and then click on Open 4 The data from the file will then appear in a standard Excel Worksheet 5 Note that the first column of data is the date and time of the reading This field is too wide to fit in the standard width of the cell Click on the A at the top of the column and then select Format Column and Autofit Selection Or simply drag the column separator between A and to achieve the right width 6 Select the right format for the Date and Time Click on A at the top of Column A then press Format Cells the Number tab under category select Date and then under Type select 03 04 97 13 30 or similar 7 Now to graph the CO2 reading click on the A at the top of Column A then press and hold the CTRL key on the keyboard and click on the at the top of the CO2 column Then click on Insert
23. ity allowing you an overview of the data that has been logged It is not intended to replace the need for a spreadsheet To use the graph select the variable that you wish to view and a graph will be automatically generated This process will suspend logging you will therefore need to click on the Restart logging button on the Instrument Status page The Technician Comms page should not be used it is to be used only under guidance from an Analox technician The Instrument status page provides a summary of the instruments datalogging status and is shown in the diagram above This page shows the Memory status of the Analox Sub The Information Panel to the right of the screen shows us that logging is Active i e the instrument is currently logging The instrument has been configured to discard the oldest stored data when the memory is full The instrument is recording all parameters Oxygen carbon dioxide depth and temperature at 10 second intervals All of these features are configurable on the Instrument Setup page The 5 command buttons will be explained in Section 7 4 es Data Logging Configuration Click on the Instrument Setup tab The following screen will appear Ln Instrument Comms Instrument Status Preview Graph Instrument Setup Technician Comms When memory full Logging Resolution Ignore newer data fio Seconds z Discard oldest data Space for 10 hours of data storage continuously from n
24. of between 0 and 20 C for example let us assume it is 15 C 2 Ensure that the instrument reading is steady 3 Enter calibration mode by pressing all 4 push buttons momentarily 4 Select Cal Tp L Calibrate Temperature Low by pressing UP DOWN 5 Press ENTER 6 Press UP DOWN until the display reads 15 0 or as appropriate value for actual temperature 7 Press ENTER 8 Press UP to change no to yes 9 Press ENTER 10 Observe after a few seconds that the instrument readout changes to the correct value it may not have been wrong before 11 Now subject the entire instrument to a steady known temperature of between 25 and 60 C for example let us assume it is 30 C 12 Ensure that the instrument reading is steady 13 Enter calibration mode by pressing all 4 push buttons momentarily 14 Select Cal Tp H by pressing UP DOWN 15 Press ENTER 16 Press UP DOWN until the display reads 30 0 or as appropriate for actual temperature 17 Press ENTER 18 Press UP to change no to yes 19 Press ENTER 20 Observe after a few seconds that the instrument readout changes to the correct value it may not have been wrong before 21 Subject the instrument to varying temperatures and confirm the correct temperature reading Analox SubMk II P User Manual AS2 810 02 October 2007 18 ANALOX SUB MK II P EXAMPLE 2 CALIBRATION OF TEMPERATURE SENSOR IN DEGREES FAHRENHEIT
25. ow until 12 10 2001 04 16 26 Clear Instrument and Setup for logging Disable Logging Analox SubMk II P User Manual AS2 810 02 October 2007 23 ANALOX SUB MK II P Disable Logging If you do not want datalogging to take place at all press the Disable Logging button Logging disabled will be shown on the Instrument Status page Logging Options Select the data items that you wish to record from CO2 Depth and Temperature by clicking on the box next to the parameter you require if the box has been successfully selected a will appear Logging Resolution Select the Logging Resolution you require by clicking on the V arrow and then clicking on the time interval you want This is the time interval between logged readings which can be set to one of various values between 10 seconds and 30 minutes Please be aware that the shorter the time interval the shorter the data storage period For example logging just CO2 at 2 minute intervals will give approximately 5 days of continuous data storage whereas logging 2 CO2 Depth and Temperature at 10 second intervals will result in approximately 2 5 hours of continuous data storage The wording continuous refers to the unit logging whilst left permanently switched on If the instrument is switched off e g overnight this time period will be extended Note there is a slight overhead every time the instrument is switched on and off so the number of da
26. oximately 70 days Alternatively the user could opt to record all four parameters at 10 second intervals in which case the endurance would be approximately 2 5 hours By choosing an appropriate interval the user can store the maximum amount of information over a chosen time period A cable is supplied to connect the Analox Sub to the serial port on a PC The cable is fitted with a 9 way female D type connector An adaptor will also be required if using a PC with a 25 way D type connector 7 1 Installation of Data Logging Software PC The datalogging software is compatible with IBM Personal Computers and compatibles running Windows 95 98 or 2000 software 1 Insert the floppy disk provided into the floppy disk drive on your computer 2 From the Start Menu on your desktop select RUN 3 Type A INSTALL BAT or use the Browse feature to locate the file INSTALL BAT on the Floppy Disk Drive assumed to be A Whilst the file is installing an MSDos type screen will appear this will disappear when installation is complete 4 Install Bat simply transfers the file DataLogInterface exe to the directory C Analox 5 Now create a shortcut to the programme on your desktop a On your desktop click with the right hand mouse button and select New and then Shortcut b Navigate using the Browse button to select the file C Analox DataLogInterface Click OK to select this programme Enter a name by which you would like
27. r is connected between the Analox Sub and correct COM port is selected d No other devices are attempting to use the COM port eg mouse drivers Now click OK to the No Reply from instrument message and retry communications When you successfully establish communications the following screen will appear You are now ready to use the programme Pe catatogintertoce Instrument Comms Instrument Status Preview Graph Instrument Setup Technician Comms Refresh Status Instrument 8504 Logging Active New Instrument Logging memory filling Suspend Logging A Oldest data will be discarded when full Memory 5 Data recorded every 10 Seconds Memory 4 full 5 Stored data for 24 minutes Logging data for Space for 10 hours 7 Oxygen 02 Gather and Save Data Depth Temperature Analox SubMk II P User Manual AS2 810 02 October 2007 22 ANALOX SUB MK II P ha Data Logging Programme Overview The datalogging programme is split into a number of pages or tabs These are Instrument Comms Instrument Status Preview Graph Instrument Setup and Technician Comms as shown in the diagram below Additional pages may also be accessed through the Technician Comms page Instrument Comms appears during the installation process the Instrument Status Preview Graph and Instrument Setup pages are used during datalogging set up activation and data retrieval The Preview Graph is a small util
28. ration parameter is defined as the Percentage of CO in the calibration gas eg 1 50 for instance calibration should always be performed at atmospheric pressure EXAMPLE 1 CALIBRATION OF SENSOR AT NORMAL ATMOSPHERIC PRESSURE USING ZERO GAS AND SPAN GAS typically 1 50 CO 1 Prior to proceeding ensure that the depth pressure readout of the instrument is within specification 2 At atmospheric pressure subject the sensor to zero gas 100 nitrogen or 100 oxygen or calibration air with removed Wait for the instrument reading to settle allow five minutes Enter calibration mode by pressing all 4 push buttons momentarily Select Cal CO20 Zero by pressing UP DOWN Press UP to change no to yes Press ENTER 3 4 5 6 Press ENTER 7 8 9 Observe after a few seconds that the instrument readout changes to the correct value it may not have been wrong before 10 At atmospheric pressure subject the sensor to 1 50 in nitrogen 11 Wait for the instrument reading to settle allow five minutes 12 Enter calibration mode by pressing all 4 push buttons momentarily 13 Select Cal 25 Span by pressing UP DOWN 14 Press ENTER 15 Press UP DOWN until the display reads 1 50 or as appropriate for the gas used this is the percentage concentration of in the calibration gas 16 Press ENTER 17 Press UP to ch
29. sed as a standby for use in emergencies replace the main batteries as detailed in Section 4 1 Replace the internal filter Bi annually Replace O rings and gaskets Replace oxygen sensor or more frequently if used in oxygen enriched atmospheres Five Yearly Change the Backup batteries as detailed in Section 4 2 Replace the sample pump Replace CO2 sensor factory fitted Replace the flow switch Replace the outlet valve Inlet Filter Replacement Unscrew the knurled inlet fitting N Extract the filter unit from the inlet filter housing taking care not to damage the two gaskets fitted either side of the filter unit Fit one gasket into the housing Push the replacement filter unit into the housing either way around Fit the second gasket over the top of the filter unit BI oo Refit the knurled inlet fitting Internal In line filter replacement Open the instrument enclosure lid Identify the filter mounted between the pump and the batteries Disconnect the Leur fittings from the filter Insert the replacement filter and reconnect the Leur fittings Analox SubMk II P User Manual AS2 810 02 October 2007 27 ANALOX SUB MK II P Oxygen Sensor Replacement 1 Open the instrument enclosure lid Identify the oxygen sensor which is mounted in the base of
30. switches Sample flow exhausts from the instrument through a valve which prevents water entering the outlet The outlet is also fitted with a special cap which reduces the possibility of accidentally blocking the exhaust The instrument is designed to withstand being totally submersed in water to a depth of 1 foot for 15 minutes The pump will automatically cut out To reuse simply restart the pump by pressing ENTER push button If the pump fails to continue running unscrew the inlet port knurled fitting and remove water from the filter inlet The pump should now be able to restart Refit the knurled fitting Analox SubMk II P User Manual AS2 810 02 October 2007 4 ANALOX SUB MK II P 3 OPERATION The external appearance of the instrument is as shown in Figure 1 BREATHER PORT ANALOX SUB 5 OXYGEN 02 CARBON x10 ppmSEV DIOXIDE ENTER AMBLE OAS INLET FILTE DEPTH FSW TEMPERATURE F SAMPLE GAS EXHAUST PORT DOWN CANCEL PUMP STATUS BATTERY STATUS s EXTERNAL POWER INPUT Figure 1 External View of Instrument To switch the unit on rotate the power switch to either the Battery
31. t b External supply cable Short length of 6mm OD Gas Sample Line d User Manual e Test Certificate Optional f Data Logging Software g Data output cable for data logging facility when fitted Analox SubMk II P User Manual AS2 810 02 October 2007 ANALOX SUB MK II P 2 INTRODUCTION The ANALOX SUB Mk ITP is a combined oxygen and carbon dioxide CO2 monitor Oxygen is monitored by an electrochemical cell and CO is monitored by an infra red absorption technique Pressure compensation is automatically applied to the data The unit can be powered internally by alkaline batteries or by an external d c supply In addition to the power switch the standard instrument has four pushbuttons which permit calibration and control of the backlight for the liquid crystal displays LCD The unit is built in a waterproof enclosure which is vented to prevent collapse in hyperbaric environments The lid of the unit should only be opened in clean dry environments This should only be necessary when changing batteries An internal sample pump draws sample gas into the instrument through a replaceable waterproof filter unit The user should ensure that the instrument s gas inlet ports remain as clean as possible to prevent blockage of the filter An internal flow switch alerts the user to lack of sample flow and automatically stops the sample pump after a few seconds The sample pump may be restarted from the front panel control
32. t but subjected to a higher pressure eg air at between 5 and 10 Bar Absolute Analox SubMk II P User Manual AS2 810 02 October 2007 11 ANALOX SUB MK II P EXAMPLE 1 CALIBRATION OF OXYGEN SENSOR AT NORMAL ATMOSPHERIC PRESSURE AND USE OF 2 GASES Calibration Air 20 9 O2 and 100 2 1 Prior to proceeding ensure that the depth pressure readout of the instrument is within specification At atmospheric pressure subject the oxygen sensor to calibration air Wait for the instrument reading to settle allow approximately one minute Enter calibration mode by pressing all 4 push buttons momentarily Select Cal O2 L by pressing UP DOWN Press ENTER Press UP DOWN until the display reads 20 9 or appropriate value for the calibration air this is the percentage concentration of oxygen in the calibration gas Press ENTER Press UP to change to 5 10 Press ENTER Observe after a few seconds that the instrument readout changes to the correct value it may not have been wrong before 12 At atmospheric pressure subject the oxygen sensor to 100 oxygen 13 Wait for the instrument reading to settle allow approximately one minute 14 Enter calibration mode by pressing all 4 push buttons momentarily 15 Select Cal 2 by pressing UP DOWN 16 Press ENTER 17 Press UP DOWN until the display reads 100 0 or as appropriate for the gas used
33. ta points recorded will be slightly reduced each time the instrument is switched off and on In normal daily use this reduction will not be apparent Full Memory This option enables you to specify what the instrument should do when its datalogging memory is full You may choose to Ignore newer data if for example you are conducting a specific test run using a short logging resolution and you only require data from that test By ignoring new data you will ensure that you retain your test data until you have been able to download it to a PC You may choose to Discard older data if you want the instrument to essentially keep on logging for ever and you only intend to download the data following an incident you want to investigate Once you have set each of the 3 options described above Logging Data Logging Resolution and Memory Full options press Clear Instrument and Setup for Logging This transfers the selected options to the instrument It also transfers the date and time from your PC to the instrument Make sure the Date and Time on your PC are correct You will be asked to confirm whether logging should Start Immediately or the next time the instrument is switched on Start at next Power Up This enables you to optimise the data storage time by leaving the instrument switched off until it is required Analox SubMk II P User Manual AS2 810 02 October 2007 24 ANALOX SUB MK II P 7 4 Data Logging Re
34. their choice The colour coding is as follows Core Colour Signal Name Connect to Red Positive ve Supply 9 to 40 V DC Blue Negative ve Supply Ov The external supply must be a stable DC supply in the range 9 40V consumption figures are shown below Typical current Input Voltage V DC Load Current without backlight Load Current with backlight mA mA 9 0 200 420 12 0 160 430 24 0 150 410 40 0 140 400 Analox SubMk II P User Manual AS2 810 02 October 2007 ANALOX SUB MK II P 6 CALIBRATION Calibration should be performed at 6 month intervals Calibration should only be performed by suitably trained personnel familiar with handling and use of calibration gas Any abuse of the calibration features may render the instrument inaccurate and unusable although there is a facility to restore the instrument to its original factory configuration if this should occur The pushbuttons alongside the instrument displays are labelled ENTER CANCEL UP and DOWN Momentarily pressing the four push buttons at the same time instructs the instrument to display a calibration menu in place of the Pump Status and Battery Status displays Initially the lower displays will show the message CAL 2 L Pressing UP DOWN will cycle through all of the available menu options as shown below Press Up Down to select appropriate option Calibrate Oxygen Sensor Low Point
35. to refer to the Shortcut or just leave it as the default name Click Finish 6 From your desktop now double click on the new shortcut Icon that you have just created 7 The following screen will appear Analox SubMk II P User Manual AS2 810 02 October 2007 21 10 11 12 13 ANALOX SUB MK II P Roata tog martae T Instrument Comms Instrument Status Preview Graph Instrument Setup Technician Comms Set comms port for instrument connection Baud 9600 Instrument Node Address Default Change Analox DataLog Interface V1 0 3a October 2001 Now connect the PC to the Analox Sub using the data lead provided and ensure that the Sub is switched on Note whether it is connected into COM1 COM2 COM3 or COM4 on the PC Note if you have one of the older 25 way D type ports on your PC you will also need a 25 way to 9 way D type adaptor Ensure that the correct port is selected press the Selection arrow adjacent to Com and select to 4 as appropriate This setting will be remembered the next time you start the programme Always ensure that the Baud rate is set to 9600 to which it will default Click on the Communicate with Instrument button You will see a message Please wait and if successful the Instrument Status tab will be selected If you get a message No Reply from Instrument check the following Analox Sub is switched on b The D type connecto
36. trieval of Data 1 Start up the Datalogging programme by clicking on the shortcut on your desktop 2 Click on the Communicate with Instrument button This will automatically take you to the Instrument Status page 3 The Memory Status will show the Status of the instrument at the present moment in time If you wish to refresh this status simply click the Refresh Status button 4 Press the Suspend Logging button if you wish to stop the Analox Sub storing data temporarily The Analox Sub will automatically resume the next time it is switched on or when the Restart Logging button is pressed 5 Press the Gather and Save Data button to transfer data from the Analox Sub to the PC Note this will automatically Suspend logging if you have not already done so 6 Please wait patiently while the instrument transfers data to the PC An estimate is provided of the time required for the data transfer to complete Ifno problems occur in the transfer process a screen will appear inviting you to save the log file 7 Inthe Save as type box select the type of file that you wish to save Let us assume that we are trying to create a Microsoft Excel spreadsheet Therefore select an Excel compatible csv file CSV stands for a Comma Separated Variable file and is a format that most spreadsheet programmes will recognise 8 Now select the folder and enter the filename that you wish to use for the file The programme will rem
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