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Aquameter

™

Series Instruction Manual

10401-00188 Rev M

23.5. Operation

Connect the Flowcell to a pumping device so that sample water enters at the bottom and
exits at the top. Adjust the flow rate so that there is no visible turbulence or cavitation within
the Flowcell. Connect an Aquameter and monitor the readings. If the readings are jumpy or
erratic, reduce the flow rate. The ideal flow rate is around 30 litres/hour (8 US gallons/hour),
although the Aquaprobe is capable of operating at flow rates as low as 15 litres/hour (4 US
gallons/hour). Flow rates above 60 litres/hour (16 US gallons/hour) are not recommended.

23.6. Caution

The maximum operating pressure of the Flowcell is 300mb (4.4 PSI). Select your pumping
device accordingly. If necessary, use a three-way bypass valve so that this limit is not
exceeded.

23.7. Cleaning

After use, rinse the Flowcell thoroughly with fresh water. To remove stubborn deposits,
scrub the inside of the Flowcell with a bottlebrush and non-abrasive detergent, then rinse
thoroughly.

Never clean the Flowcell with concentrated acid or alkaline based cleaning products
such as Decon 90. These products can strip the anodised finish from the Flowcell
and damage the plastic components.

23.8. Flowcell Troubleshooting

Problem

Cause / Remedy

DO readings are
abnormally high or are
fluctuating wildly.

Aeration of sample water. Check all joints for air leaks.
Reduce flow rate to avoid cavitation.

Turbidity readings are
abnormally high.

Air bubbles adhering to the Turbidity Electrode lenses.
Agitate Flowcell to dislodge.
Aeration of sample water. Check all joints for air leaks.
Reduce flow rate to avoid cavitation.

Sample water is leaking
from around the top of the
screw collar.

Screw collar is not tight enough. Tighten up.
Grease / PTFE tape has not been applied to the joint
between the Probe Sleeve and Probe Body (single part
sleeves only). See ‘Aquaprobe Preparation Prior to First
Use’ on previous page.
Operating pressure is too high. Reduce pressure / flow rate.

Probe is forced up out of
the Flowcell during use.

Operating pressure is much too high. Reduce pressure /
flow rate.

© 2011 Aquaread Ltd.

www.aquaread.co.uk

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Содержание AM-100 Aquameter

Страница 1: ...Measurement Document No 10401 00188 Revision M Date February 16 2011 Aquaread Ltd Kent Innovation Centre Thanet Reach Business Park Millennium Way Broadstairs Kent CT10 2QQ ENGLAND Phone 44 1843 609 692 www aquaread co uk P O Box 4 6987 ZG Giesbeek Nijverheidsstraat 30 6987 EM Giesbeek The Netherlands T 31 313 880 200 E info eijkelkamp com I www eijkelkamp com M185701E ...

Страница 2: ...ble modify reverse assemble reverse engineer or reduce to human readable form the Software or any part thereof or create any derivative works based on the Software RECYCLING Any product bearing this symbol must be handed over to an applicable collection point for the recycling of electrical and electronic equipment By ensuring this product is disposed of properly you will prevent possible adverse ...

Страница 3: ...H MEASUREMENT AP 1000 ONLY 14 7 1 TAKING DEPTH MEASUREMENTS 14 7 2 DIFFERENTIAL DEPTH MEASUREMENT 14 8 MEMORY MODE 15 8 1 MANUALLY SAVING READINGS 15 8 2 RECALLING AND VIEWING SAVED READINGS 15 8 3 RECALLING GLP DATA 15 8 4 CLEARING THE MEMORY 16 8 5 AUTOMATIC DATA LOGGING 16 8 6 IMPORTANT INFORMATION ABOUT MEMORY MODE 17 9 SETTING UNITS OF MEASUREMENT 18 10 RAPIDCAL CALIBRATION METHOD 20 10 1 ABO...

Страница 4: ...TING THE TURBIDITY 1000 NTU POINT 42 15 7 VERIFYING TURBIDITY 1000 NTU POINT CALIBRATION 42 15 8 ERRORS DURING CALIBRATION 42 15 9 RECOGNISING THE TURBIDITY ELECTRODES 42 15 10 LENS MAINTENANCE 43 15 11 REFERENCES 43 16 AQUALINK PC SOFTWARE 44 16 1 SOFTWARE INSTALLATION 44 16 2 DRIVER INSTALLATION 44 16 3 RUNNING AQUALINK 44 16 4 UPLOADING DATA FROM YOUR AQUAMETER 45 16 5 PH ORP ELECTRODE DATA LOG...

Страница 5: ...ND AQUAREAD S OPTICAL DO MEASUREMENT SYSTEM 60 22 1 PRINCIPLE OF OPERATION 60 22 2 SENSOR CAP LIFE 61 23 APPENDIX 2 FLOW THROUGH CELL 62 23 1 INTRODUCTION 62 23 2 SPIGOT INSTALLATION 62 23 3 AQUAPROBE PREPARATION PRIOR TO FIRST USE 62 23 4 AQUAPROBE INSTALLATION 62 23 5 OPERATION 63 23 6 CAUTION 63 23 7 CLEANING 63 23 8 FLOWCELL TROUBLESHOOTING 63 24 APPENDIX 3 PROBE HANGER 64 2011 Aquaread Ltd ww...

Страница 6: ...ll cases you will receive the following The Aquaprobe unit Protective Sleeve End Cap 300mL of RapidCal Solution Spare 300mL calibration rinse bottle Spare set of sleeve screws Two mounting nuts Getting started card for quick reference Warranty card In addition you may receive other solutions and spare parts see Aquameters Aquaprobes in section 18 2 1 The Aquameter and the Environment The Aquameter...

Страница 7: ...s may be present in the water being sampled i e down bore holes or in shallow streams littered with rocks or garbage When sampling in open water leave the protective Sleeve End Cap off as the increased flow across the electrodes will give faster readings The protective Sleeve End Cap should never be fitted during calibration or when using the Aquaprobe with the optional Flow Through Cell Flowcell ...

Страница 8: ...gers 3 4 Battery Condition Icon On all the main Aquameter screens a battery condition icon is displayed in the top left corner The icon shows full when the batteries are fresh and gradually empties as the batteries are used When the batteries need replacing the empty battery icon will flash on and off If you ignore this the Meter will automatically switch itself off when the battery voltage become...

Страница 9: ...short time you should be able to navigate around the entire menu system at speed using just the four arrow keys If at any time you leave the Meter in one of the sub menu screens it will automatically back out to the main operating screen after 15 seconds 4 1 Initial Switch On Language and Clock Setup To switch the meter on or off briefly press the red key Do not hold it down The meter contains a c...

Страница 10: ...witch the Aquameter on TIP Occasional application of a smear of silicone grease or similar lubricant to the protective Sleeve End Cap O ring and the inside rim of the Probe sleeve will make fitting and removal of the Cap easier If the Aquaprobe is connected correctly the meter will read the Probe s serial number and model number then will automatically configure itself to display only those readin...

Страница 11: ...TUs AP 200 400 600 800 900 1000 pH pH Acidity Alkalinity pH or pHmV AP 100 400 thru 1000 ORP Oxidation Reduction Potential mV AP 100 400 thru 1000 GPS GPS Status See section 6 4 AM 200 All Probe Models DO Dissolved Oxygen Sat or mg L AP 300 500 thru 1000 EC Electrical Conductivity µS cm or mS cm AP 300 500 thru 1000 TDS Total Dissolved Solids mg L or g l AP 300 500 thru 1000 SAL Salinity PSU or pp...

Страница 12: ...dy By this time the other values should be reasonably steady and ready for reading or saving Be aware in order to achieve accurate Dissolved Oxygen readings the Probe needs to be either placed in flowing water or needs to be stirred or raised and lowered continuously to ensure a constant flow of fresh water over the DO Electrode If there is no water flow across the Probe the oxygen in the immediat...

Страница 13: ...quameter AM 200 contains a built in GPS receiver and antenna The antenna is situated at the top of the case just behind the AQUAREAD Logo For optimum signal reception the antenna must be able to see a reasonably large amount of the sky The GPS receiver will not work indoors or when shielded from the sky by any solid structure After switch on the GPS receiver will automatically start to search for ...

Страница 14: ...robe to the Meter and switch on prior to submerging the probe in water Select the Baro Depth screen as illustrated below The depth should be reading zero BARO 1013mb DEPTH 00 00m Hit OK to zero GPS 3D Pos If the depth is not reading zero this is possible if the probe is wet and a low EC reading is registering press the OK key You will be asked to confirm by pressing OK again Slowly lower the probe...

Страница 15: ...o see earlier readings press the up arrow key Just before each set of readings is displayed the Tag will be briefly displayed To view all the parameters within one set of readings use the left right arrow keys as described earlier To exit Memory Recall mode press the ESC key If no key is pressed for 30 seconds Memory Recall mode will be automatically cancelled 8 3 Recalling GLP Data Each time a se...

Страница 16: ...gging If you want to save readings automatically on a regular basis in order say to check water quality at a certain location over a period of time you can set the Meter to record readings automatically To do this press the MENU key The Main Menu screen will be displayed Main Menu Auto Data Logging Settings Calibration Select Auto Data Logging by pressing the right arrow key or the OK key The Auto...

Страница 17: ...spent a day taking readings with the Meter set to read Dissolved Oxygen in Saturation then when you got back you really want to see Dissolved Oxygen displayed in mg L you can do this by simply changing the Meter settings see section 9 Setting Units of Measurement The stored data can be displayed any way you want on recall You are not limited to viewing the data in the same way it was logged This i...

Страница 18: ...H ORP or Salinity Finally line 3 will give access to Barometric Pressure Altitude and Depth settings Moving the cursor right onto the first line will display the following screen Units DO SAT EC Ref 25 C TDS Fact 0 50 On this screen you can adjust the DO setting between Sat and mg L This will set the Meter to display Dissolved Oxygen as either Saturation or in milligrams Litre which is the same as...

Страница 19: ... this field must be set to ORP The meter will then display ORP in mVs over a range of 2000mV The ORP option is not available when connected to Aquaprobe models AP 700 and AP 800 as they both have combined pH ORP electrodes and ORP display is automatic The last option on this screen allows you to choose between displaying salinity in Practical Salinity Units PSU or parts per thousand ppt which is t...

Страница 20: ...ed 10 2 Using RapidCal RapidCal is an easy way to calibrate any of the Aquaprobes in the field using just one calibration solution RapidCal calibrates EC at 2570µS cm the pH7 00 point and the Zero NTU Turbidity point simultaneously Ideally this procedure should be carried out at the beginning of each day the Probe is to be used To use RapidCal 1 Remove the lid from a fresh 300mL bottle of RapidCal...

Страница 21: ...he bottle wash in fresh water then shake off ensuring there are no droplets adhering to the DO membrane 2 Take an empty calibration bottle rinse with fresh water then empty it leaving the inside wet but with no standing water 3 Insert the Probe and wait until the temperature measurement is completely stable This is very important Temperature must be between 5ºC and 40ºC 41ºF 104ºF 4 Referring back...

Страница 22: ...that does not cure the problem replace the DO Cap see Replacing the Optical DO Cap AP 900 AP 1000 only in section 14 If the corrective actions shown above for Errors 08 and 09 do not work thoroughly clean the Probe and try again If Error 09 persists reset the calibration values to Factory Defaults then try again If Error 09 persists when calibrating a Galvanic DO sensor replace the DO Electrode Me...

Страница 23: ...ys CAL RESTORED Once factory calibration defaults have been restored you must carry out a full calibration of the electrode in question 10 5 Calibration Data Storage Each Aquaprobe contains its own microprocessor and memory All calibration data including the GLP data is stored within the Probe s memory When a Probe is connected to a Meter this data is transferred for display and logging This is a ...

Страница 24: ... of the Probe using a soft cloth If the Aquaprobe you are using includes a pH ORP electrode remember to replace the storage cap after use Failure to do so will damage the electrode For more details see Keeping the Electrodes Moist in section 13 Never clean the Probe with solvents alcohol or concentrated acid alkaline based cleaning products such as Decon 90 These products can strip the anodised fi...

Страница 25: ...and re attach the lower sleeve The Probe Sleeve must be absolutely rigid with respect to the Probe Body If you can move the Probe Sleeve to and fro whilst holding the Probe Body tighten the four screws further before re calibration The complete Probe sleeve forms an integral part of the Probe and is essential for correct operation Removing and replacing the upper Probe sleeve will alter the Probe ...

Страница 26: ...useful belt wrench for tightening and loosening the pH ORP electrode Slide the lanyard over the electrode and use it to grip the knurled body Never immerse an Aquaprobe with the pH ORP electrode removed This will cause serious damage to the electrode socket This is not covered by your warranty On Aquaprobe Models AP 100 AP 400 AP 500 or AP 600 if you replace the pH electrode with an optional ORP e...

Страница 27: ...compensate for temperature variation in the calibration buffer and pH electrode during calibration To calibrate the pH electrode follow these steps 1 Fill a 300mL calibration bottle with fresh pH 7 00 solution or RapidCal remove the storage cap from the pH electrode wash the Probe in distilled water then drop the Probe in all the way The Sleeve End Cap should not be fitted 2 Switch the Aquameter o...

Страница 28: ...0 screen shown above is displayed press OK then press the ESC key repeatedly to get back to the main display Remove the Probe from the calibration bottle rinse thoroughly in fresh water shake off any excess and dry the outer sleeve with a soft cloth Dampen the sponge in the storage cap with storage solution and fit it to the pH ORP electrode pH calibration is now complete 13 5 Errors During Calibr...

Страница 29: ...n is hazardous to your health Be sure to handle with care and to read and comply with all health and safety advice On Aquaprobe Models AP 100 AP 400 AP 500 or AP 600 you must have an ORP electrode fitted and the Aquameter must be set to read ORP If your Aquameter is set to read pH or pHmV access to ORP calibration will be barred On Aquaprobe Models AP 700 AP 800 AP 900 and AP 1000 a dual pH ORP el...

Страница 30: ...table then it will send the calibration command to the Probe where the calibration takes place During calibration the Calibrating screen is displayed and the progress counter counts up If the calibration is successful the counter will reach 100 and the following screen will be displayed Calibrating 100 Press OK When calibration is complete press the OK key then the ESC key repeatedly to return to ...

Страница 31: ...solution containing hydrogen ions at unit activity is zero at all temperatures The ORP reference electrode used in Aquaread combination electrodes is a 3MPK1 silver chloride type and exhibits potentials on the hydrogen scale of Temperature Potential 5 C 221 mV 10 C 217 mV 15 C 214 mV 20 C 210 mV 25 C 207 mV 30 C 203 mV 35 C 200 mV 40 C 196 mV Thus to refer an ORP potential value measured with the ...

Страница 32: ...h water over the DO Electrode If there is no water flow across the Probe the oxygen in the immediate area of the DO Electrode will be consumed and the reading will start to fall Aquaprobe models AP 900 AP 1000 featuring the Optical DO sensor do not suffer from this restriction No water flow is necessary when using these probes EC measurement is not possible with the lower Probe sleeve removed as t...

Страница 33: ...1 F 104 F 4 Press the MENU key then select Calibration The following screen will be displayed Calibration RapidCal DO 100 Full Cal 5 Select Full Cal The screen will change to Calibration pH ORP DO EC Turb 6 Select DO EC The screen will change to Calibration DOZero 01 Jan 09 DO100 01 Jan 09 EC2570 01 Jan 09 The dates shown to the right of the screen are the dates of the last successful calibration ...

Страница 34: ... important Temperature must be between 5ºC and 40ºC 41ºF 104ºF 4 Referring back to the screens shown in items 4 or 6 above dependent on software version select DO100 5 Wait while the Aquameter carries out the calibration procedure 6 When the Calibrating 100 screen shown above is displayed press OK then ESC repeatedly to return to normal reading mode If a problem occurs during calibration an error ...

Страница 35: ...Optical DO Cap AP 900 AP 1000 only The Optical DO Cap contains a lens which is coated with an oxygen sensitive luminophore which is in turn coated with a black rubber compound that provides optical isolation but is permeable to oxygen Oxygen molecules pass through the rubber into the luminophore Never touch the black rubber end of the DO electrode as the oils in your skin can block the pores in th...

Страница 36: ...ssage 09 For best results calibrate as close to 25ºC as possible The probe will compensate for temperature variation in the Calibration Standard during calibration 1 Remove the storage cap from the pH electrode if fitted wash the Probe in distilled water then drop the Probe into a calibration bottle filled with your chosen EC Calibration Standard The Sleeve End Cap should not be fitted Ensure the ...

Страница 37: ... 8 Once the correct Calibration Standard value is being displayed press the OK key The screen will change to PLEASE WAIT Stabilising 000 9 When the Calibrating 100 screen is displayed press OK Special Notes If you have selected a Calibration Standard value other than 2570 RapidCal then you subsequently use the RapidCal calibration technique described in section 10 the Calibration Standard value wi...

Страница 38: ...oblem persists strip the probe down as described below and thoroughly clean the EC contacts 14 11 Errors During Calibration At the beginning of the calibration routine a sanity check is done If the probe detects that the Calibration Standard value set and the Calibration Standard being used differ Error 09 will be reported If any other problems occur during calibration an error message will be dis...

Страница 39: ...t by varying degrees Combined these effects result in wide variability in the distribution and intensity of light scattering from a turbid water sample As a result different combinations of particle shape size colour and refractive index can produce similar turbidity effects By contrast changing only the incident light wavelength and detector distance can dramatically change the measured turbidity...

Страница 40: ...e and at least once a month at 1000 NTU to ensure optimum accuracy To avoid air bubbles in the calibration solutions never shake the bottles 15 4 Turbidity Zero Point Calibration To calibrate the Turbidity zero point follow these steps 1 Fill a 300mL calibration bottle with de ionised water or fresh RapidCal solution remove the storage cap from the pH electrode if fitted wash the Probe in distille...

Страница 41: ...ation Due to the fact that debris and air bubbles can adversely affect Turbidity calibration it is essential to verify calibration has been properly achieved To do this follow calibration with this procedure 1 Remove the probe from the calibration bottle shake it off then reinsert Bang the probe to remove any air bubbles 2 Press the ESC key repeatedly to get back to the main screen 3 Wait until th...

Страница 42: ... properly achieved To do this follow calibration with this procedure 1 Remove the probe from the calibration bottle shake it off then reinsert Bang the probe to remove any air bubbles 2 Press the ESC key repeatedly to get back to the main screen 3 Wait until the temperature and TURB readings are stable then check that the TURB reading is between 990 NTU and 1010 NTU this represents 1 of the high s...

Страница 43: ...lowing sources National Field Manual For the Collection of Water Quality Data Turbidity section 6 7 Revised by Chauncey w Anderson USGS 2004 Environmental Instrumentation and Analysis Handbook Randy D Down and Jay H Lehr Chapter 24 Turbidity Monitoring John Downing John Wiley Sons Inc 2005 Turbidity Science Michael J Sadar Hach Company 1998 Guidelines and Standard Procedures for continuous Water Q...

Страница 44: ... your PC using the USB cable supplied The Aquameter will switch itself on automatically and display USB CONNECTED on its screen as you plug into your PC The Found New Hardware wizard on your PC will automatically activate Select the recommended option Locate and install driver software If given the option do not allow Windows to search the Internet for drivers The next screen will ask you to Inser...

Страница 45: ...are grouped by electrode function Any data that is unavailable or out of range will be displayed as dashes To move up and down the Tag date time column use either your mouse or the cursor up down keys Remember the Aquameter stores all logged data in a raw Probe format so can be made to output logged data in several different forms dependent upon the Meter s current settings See Important Informati...

Страница 46: ...ing Logged Data Once a set of logged data has been uploaded from the Aquameter it can be saved on your PC as a Raw Data file These files use a proprietary Aquaread format and are saved with a amf aquameter file extension To save the uploaded data click the Save as Raw Data button You will be asked for a file name in the normal Windows format The file name you choose will automatically be given the...

Страница 47: ...start and end date time and position the total number of readings an analysis of the highest and lowest readings the variance between the highest and lowest readings the average readings and the GLP data Each block of individual readings laid out in chronological order follows this page This report can be imported into any text editor or word processor package Useful Tip Of the two text editors su...

Страница 48: ...mp 17 9C Tag 0254 Date 25 Jul 2009 Time 07 14 01 Baro 1005mb Tag 0838 Date 27 Jul 2009 Time 09 46 00 Turb 04 1 NTU Tag 0830 Date 27 Jul 2009 Time 09 06 00 pH 7 55 Tag 0003 Date 24 Jul 2009 Time 10 19 01 pHmV 40 8mV Tag 0556 Date 26 Jul 2009 Time 08 24 00 ORP 354 4mV Tag 0820 Date 27 Jul 2009 Time 08 16 00 DO 30 1 Sat Tag 0427 Date 25 Jul 2009 Time 21 39 00 EC 782uS cm Tag 0149 Date 24 Jul 2009 Tim...

Страница 49: ...elect 200 or less records for export in each file If you select more than 200 records Google Maps will truncate your file as it is loaded If you have selected more than 200 data records for export AquaLink will warn you of this limitation Google Earth does not suffer from the same limitation so you can export a full set of records in your file 16 16 Importing Files into Google Maps To view your fi...

Страница 50: ...hpin and all the data points are listed in a column on the left of the screen To view the data associated with each pin either click on the pin or click on the data point in the list Please note Although you have downloaded the Google Earth application and are running it from your PC you still need to be connected to the Internet in order for the application to access satellite images Typical Goog...

Страница 51: ...s useful but for real detail Google Earth is the answer Zooming in on the satellite photos in Google Earth is a great way to spot potential sources of pollution If one of the readings you have taken shows an abnormality the chances are that you will be able to spot the possible source of the problem a riverside factory for example directly on the satellite photo 2011 Aquaread Ltd www aquaread co u...

Страница 52: ...r Ni MH rechargeable 5 x AA cells Alkaline or Ni MH rechargeable Battery Life Alkaline 20 hours Ni MH 40 hours Alkaline 40 hours Ni MH 60 hours Operating Temperature 20 C to 70 C 20 C to 70 C Protection Class IP67 IP67 17 2 PROBES GENERAL Protection Class IP68 permanent immersion Immersion Depth Min 75mm 3 Max 30m 100 Operating Temperature 5 C 50 C 23 F 122 F Dimensions L x Dia 290 mm x 42 mm 11 4...

Страница 53: ...sistivity Resolution 2 Auto range scales 5 9999 Ω cm 10 0 1000 0 KΩ cm Accuracy 1 of reading or 1 Ω cm if greater Range 0 70 PSU 0 70 00 ppt g Kg Salinity Resolution 0 01 PSU 0 01 ppt Accuracy 1 of reading or 0 1 unit if greater Seawater Range 0 50 σt Specific Resolution 0 1 σt Gravity Accuracy 1 0 σt Range 0 14 pH 625mV pH Resolution 0 01 pH 0 1mV Accuracy 0 01 pH 0 5mV Range 2000mV ORP Resolutio...

Страница 54: ...ution a pH Electrode Storage Cap a 25mL bottle of Storage Solution a calibration rinse bottle and a Getting Started card AP 600 AQUAPROBE 600 Aquaprobe with Temperature pH Turbidity Dissolved Oxygen Conductivity Electrodes Shipped with a 3 meter cable 300mL RapidCal solution 1 spare DO Electrode Membrane Cap a 25mL bottle of DO Electrode Filling Solution a pH Electrode Storage Cap a 25mL bottle of...

Страница 55: ...ill fit AP 100 AP 400 AP 500 AP 600 only ORP EL ORP Electrode Optional ORP Electrode shipped complete with protective storage cap and a 25mL bottle of Storage Solution will fit AP 100 AP 400 AP 500 AP 600 only COMBI EL pH ORP Electrode Replacement pH ORP Electrode shipped complete with protective storage cap and a 25mL bottle of Storage Solution will fit AP 700 AP 800 only AP CAP Sleeve Cap Replac...

Страница 56: ...ge misuse tampering lack of prescribed maintenance water ingress through unprotected Meter and Probe sockets and damage caused by leaking batteries are not covered If service is required contact our Service Department directly by email in the first instance service aquaread co uk Report the model number date of purchase serial number and problem You will be given a Returns Authorisation number by ...

Страница 57: ...nd damage some of the plastic components 19 2 Decontamination Certificate Please print this certificate complete all sections and enclose it with any returned equipment Decontamination Certificate Company Name ____________________________________ Address _______________________________________________________________________________ _________________________________________________________________...

Страница 58: ... be dead or incorrectly fitted Check you have fresh batteries fitted and that they are inserted the correct way round The USB cable does not power the Aquameter There may be a problem with the USB socket on the PC try an alternative socket ERROR 01 appears on the Aquameter screen This indicates that the pH electrode has dropped below 85 efficiency Try cleaning the pH electrode and re calibrating a...

Страница 59: ...for correct EC operation If you can move the Probe Sleeve to and fro whilst holding the Probe Body tighten the four screws then recalibrate The EC electrode may need recalibrating Recalibrate The EC electrode may be dirty Clean the EC electrode then recalibrate Turbidity readings are inaccurate or unstable Have you got both halves of the Probe Sleeve fitted Turbidity will not work without the whol...

Страница 60: ... and the high speed electronics required to obtain good accuracy are extremely complex Calling on many years experience designing military Night Vision Goggle NVG compatible optics Aquaread engineers have produced an amazingly small and elegant solution Housed in a resin filled marine grade aluminium body that measures just 8mm 0 3 diameter by 13mm 0 5 long the fully waterproof AquaPlus Sensor Mod...

Страница 61: ... reading can be taken the less time the luminophore needs to be excited and the longer it will last The high speed circuitry within the AquaPlus module requires just eleven milliseconds to take a reading This incredibly fast reading time increases the useful life of the luminophore considerably Another technique used to prolong the life of the luminophore in the AquaPlus module is variable excitat...

Страница 62: ...uld seal due to the taper If a spigot will not seal properly remove it then re insert with some PTFE plumber s tape wrapped around the thread 23 3 Aquaprobe Preparation Prior to First Use If you are using an early Aquaprobe with a single part Sleeve the Sleeve should be removed and a good layer of silicon grease or a few turns of PTFE tape should be applied to the mating surfaces where the Probe S...

Страница 63: ...abrasive detergent then rinse thoroughly Never clean the Flowcell with concentrated acid or alkaline based cleaning products such as Decon 90 These products can strip the anodised finish from the Flowcell and damage the plastic components 23 8 Flowcell Troubleshooting Problem Cause Remedy DO readings are abnormally high or are fluctuating wildly Aeration of sample water Check all joints for air le...

Страница 64: ...loosen the top plastic nut that is attached to the top of the Probe and slide it a little way up the cable Ensure the bottom nut is tight against the top of the probe Slide the Probe Hanger over the cable then down onto the threaded part of the Probe Bring the top nut down onto the thread then use the Probe Hanger as a spanner to tighten the nut The final assembly should be as shown below Attach y...

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