User Guide
Contents
1. Calibration Procedure The following items will be required for the full calibration procedure a Saturated sodium sulphite solution zero point calibrant b De ionised water Ensure that the protective cap is moved from the end of the probe Switch on the instrument Ensure that the instrument D O units are set to Sat From the main screen press the Menu OK button Use the keys A V to scroll through the menu Select Calibration Use the keys AV enter the calibration PIN 116 NOTE The initial PIN is set to 116 This can be changed by the user E key to accept or reject Use V the arrow key to select Dissolved O2 0 Press the key to accept Place the probe in the sodium sulphite solution and allow the D O reading to stabilise The actual display reading at this 0 level is shown to the left of the window and may not be exactly zero Press the key to accept the 0 calibration DO501 User Manual C 13 Press the DO501 User Manual Remove the probe from the sodium sulphite solution rinse well with de ionised water and dry the probe tip with a soft tissue Press the ESC key to return to the calibration menu Then select Dissolved 02 100 and press the Menu OK key Note There is a time out period on all menu displays so if the instrument display has reverted to the main screen the calibration menu will have to be re selected Being now placed in air the probe reading will start to rise2. protect the instrument s calibration from being inadvertently changed or lost The PIN number can be changed within the range 1 to 9999 as follows Setting Zero as a PIN number effectively removes the PIN protection From the main screen press the Menu OK button Use the keys A V to scroll through the menu Select Calibration Use the keys AV enter the calibration PIN 116 NOTE The initial PIN is set to 1 Use the keys A V Change PIN enter the new PIN number and press Menu OK If Zero is set as a PIN PIN protection is effectively removed D 19 Platinum Resistance Probe Temperature This reading is factory calibrated and should not require re calibration during normal service life of the probe Contact O amp H Designs for details of re calibration 20 Probe Temperature Coefficent T C Do not adjust this value as the probe will display incorrect readings at differing temperatures DO501 User Manual C 15 DOS501 User Manual The reading is factory calibrated and should not require re calibration during normal service life of the probe Contact O amp H Designs for details of re calibration 21 Service amp Warranty For more information on the DO501 contact us directly or an approved agent O amp H Designs Guarantees the unit to be free of defects for a period of 12 months from date of manufacture This does not cover damage to the probe tip caused by unreasonable use This warranty e
3. self test The default display units are saturation of DO gt When the unit is powered up allow at least 1 minute for stabilisation DOS501 User Manual C 4 DOS501 User Manual Instrument LCD display Battery charge level indicator bar graph Full charge represents approximately 120 hours of continuous operation When the charger is connected the charge level indicator icon becomes dynamic indicating that the battery is charging The dynamic display stops when the battery is fully charged Backlight is switched on when a star logo is present in the display this indicates that the backlight is turned on automatically when any key is pressed Backlight remains on for the period set under set up default 1 min Temperature probe reading used to compensate DO reading Units will be as set up default C Dissolved oxygen reading default Sat Salinity correction level ppt manually entered under set up default 0 Barometric pressure display default mbar Used to automatically compensate the DO gt reading for barometric pressure altitude changes DOS501 User Manual C 5 DO501 User Manual 8 Set up and Operation When in the normal measurement mode main screen displayed pressing and holding the key for approx 1 sec will store the current screen in the next available memory Confirmation that the screen has been stored is given by the screen temporarily switching to reverse video
4. single increment or decrement 14 Auto Powerdown The instrument is equipped with an auto powerdown feature designed to conserve battery power This feature can be set to either on or off When set to on if the instrument is switched on and no controls are operated for a preset period 10 min default the main display will give a 30 second warning that the instrument is about to switch off Powerdown in 30seconds Pressing any key during this period cancels the powerdown operation and resets the timer Timer range is 1 to 99 minutes Alternatively the auto Powerdown feature can be switched off After it has been switched on the instrument will then remain on until it is either manually switched off or until the battery is fully discharged From the main screen press the Menu OK button Use the keys A V to scroll through the menu DO501 User Manual C 10 DO501 User Manual Select Powerdown and follow the key sequence When entering a timing period holding the appropriate up or down arrow key will apply either continuous increments or decrements to the entered value until the key is released Single presses of either provide a single increment or decrement Set up Display Contrast The instrument s display contrast can be adjusted with this utility The display contrast is automatically corrected for varying temperatures From the main screen press the Menu OK button Use the keys A V to scrol
5. towards100 The actual display reading from the probe is shown to the left of the window showing 100 0 and may not reach 100 Wait whilst the reading is still rising even if it rises above 100 and when it stabilizes Press the key to accept the 100 calibration Use the keys A Select The probe calibration procedure is now complete Press ESC three times to return to the main display select Yes at the OK to accept prompt For Quick Cal daily calibrations are carried out only at the 100 saturation point prior to commencing work with the instrument Refilling the probe with electrolyte If the DO501 is supplied with a refillable probe type then occasionally check that fluid is present in the probe end cap The DO501 is supplied with a smallbottle of electrolyte and can be used to refill the probe as follows Unscrew the endcap anticlockwise discard the existing fluid Check the end of the electrode for excessive deposits The white coating is a normal reaction between the disimilar metals used in the probe This can be cleaned with a fine wet dry cloth 1000 grit or higher Fill the end cap Y2 way with electrolyte and reattach to the probe DO NOT OVERTIGHTEN If a new end cap is fitted allow a couple of hours for the membrane to stabilse DO501 User Manual C 14 DO501 User Manual Do not refill the probe in direct sunlight 18 Calibration PIN number The calibration PIN number is designed to
6. At the time of supply the instrument is set up with the following factory set default parameters Temperature units C Pressure units mbar D O Units Sat Backlight ON 1 min on time duration Power down ON 10 min 9 Measurement Units The units set up menu allows the D O Temperature and Pressure units to be selected default units given first Dissolved Oxygen units Sat mg l mV Temperature units C or F Pressure units mbar psi ft or m From the main screen press the Menu OK button Select units to change E DO Temperature Pressure V to select preferred units Press the key to accept new units DO501 User Manual C 6 Use the keys DO501 User Manual 10 Setting Salinity If required this value can be adjusted if the DO501 is to be used in regions with brackish water or directly in seawater DO501 Accuracy cannot be guaranteed at high salinities From the main screen press the Menu OK button Use the keys N V to scroll through the menu Select Salinity The display will show the default of 0 parts per thousand ppt Use the keys A V to adjust if required Press the key to accept the salinity reading Press the key to quit back to normal readings The table below shows the effects of salinity on the readings and the factor the DO501 will apply Salinity ppt Factor 0 1 5 0 97 10 0 94 15 0 91 20 0 88 25 0 85 30 0 83 35 0 8 DOS501 User Manual C 7 D
7. DO50iHandheld DO Monitor User Manual O amp H Designs 35 Barton Rd Barlestone Warwickshire CV13 OER http www ohdesigns co uk England contact ohdesigns co uk Tel 01455 290 620 DOS501 User Manual Contents PG MENTE TOA VON eae Aia 3 Safe Sao Re ee ee Ce Ee TN 3 a A cine alr asbe ued cyt 3 General terca nte 3 Specifications atete tetee a od a 4 Abbreviations at Tee e e e e e eded e e 4 O emer 4 CCD Display coss SesS aus ee 5 Unit Set up and Operation serra 6 Measurement Display Units iii 6 E 7 Setting Atmospheric PRESS se 8 Recall Ste Data a ei ei 9 Cleat SCreenizMeGA secxtsatuntunn dat ia 9 Backlight eere 10 Auto Power DOWD ii 10 Taki g Readings Senet laa a len ova 11 Calibration ete ee ene enone ee ee ee Oe ee E en OE Te OnE De NN 12 Change PERN sescripnicda naaa 15 Platinum Resistance Probe iii in 15 Probe Temperature Coefficient iii 15 Service amp Warranty aeaa E E E NAE E 16 DO501 User Manual C 2 DOS501 User Manual 1 Introduction The DO501 is an advanced microprocessor controlled Dissolved Oxygen meter It will provide long periods of service and can be used in monitoring or logging applications It can be used for measuring dissolved Oxygen DO levels in tanks ponds and lakes and is ideal for spot checking areas that are prone to low DOZallowing corrective action such as aeration to be put in place The system can also be used to measure DO in both static and trans
8. O501 User Manual 11 Atmospheric pressure If required this value can be manually adjusted This can correct for errors due to large variations in altitude or depressions in weather fronts If the pressure is set to autothe internal pressure sensor will automatically correct for variations whilst in mg l amp ppm of dissolved oxygen From the main screen press the Menu OK button Use the keys Select Manual The display will show the default of 1013 mbar 1 atm Use the keys A V to adjust if required Press the key to accept the pressure reading Alternatively in the pressure menu Use the keys NM V to select Auto Press the key to quit back to normal readings The effects of adjustment of pressure are shown below The DO501 will apply the relevant correction factors Pressure m height mmHg Factor 100 200 300 400 500 to scroll through the menu DO501 User Manual C 8 DO501 User Manual 12 Recall Stored Data This instrument has a 40 location memory used for storing operational readings Data stored during operation is accessed for transcription purposes from the first page of the top level menu under Recall From the main screen press the Menu OK button Use the keys N V to scroll through the menu Select Recall E After pressing the Menu OK key Using the keys A V Scroll through the stored screens location by location Stored screens are presented in reverse v
9. ideo and a camera icon together with a memory location number is displayed in place of the battery level indicator View Data is selected automatically Clear Screen Memory To clear the screen memory from the main screen Press the Menu OK key Use the keys A V to select Yes or No Press the to accept or reject It is recommended that after transcribing the data the memory be cleared leaving it clear for another day s operation Operating procedures vary within organisations but if the memory is not cleared subsequent data saves will be placed in the next available memory location After all 40 locations have been written to subsequent save operations will start to overwrite upwards from Location 1 DO501 User Manual C 9 DO501 User Manual 13 Backlight The instrument is equipped with a backlight which can be set up to come on for a preset period 1 to 99 sec whenever any key is pressed To conserve battery power the default setting is 10 sec after which period the backlight goes off Alternatively the backlight can be set to permanently off From the main screen press the Menu OK button Use the keys A V to scroll through the menu Select Backlight and follow the key sequence When entering a timing period holding the appropriate up or down arrow key will apply either continuous increments or decrements to the entered value until the key is released Single presses of either provide a
10. l through the menu Select Contrast Use the keys AV to optimise the display Press the key to accept or reject 15 Taking Readings Ensure that the protective sealing cap is removed prior to deployment During operation place the probe in a vertical position with the probe tip facing downwards This is indicatedon the side of the Probe housing When positioning the probe in the water to be measured take care to locate away from the direct influence of aerators Actual position in a water course is dependant on depth profile width and length therefore actual placement postion will be found by in situ testing To achieve greatest accuracy when in water to be measured move the probe ina figure of eight motion to allow gentle movement of water across the probe tip DO501 User Manual C 11 DO501 User Manual 16 Calibration All DO501 systems are supplied with a full calibration at 0 amp 100 water saturated air at 1013mb pressure All normal readings are in mg l It is recommended that the sensor is recalibrated at 2week intervals or less to maintain accuracy A Quick Cal before use will guarantee maximum accuracy from the probe and electronics Regular checks are necessary Use a soft brush or moistened tissue to remove any dirt or debris from the probe tip The probe is a Galvanic type and thus requires KCL solution for filling Life expectancy in normal use is approx 60 months Membranes can be changed a
11. portation tanks on vehicles where flow meters alone cannot guarantee DO levels 2 Safety The manufacturer has designed this product to be safe when operated correctly Please take care to read any safety instructions as these have been designed to protect the user from personal injury and the equipment from damage O amp H Designs are not responsible for errors in usage or connection and accept no responsibility for consequential losses 3 Charging the DO501 The DO501 contains an inbuilt NimH high capacity battery This should be first charged for 20 hours Subsequent charges of 12 14 hours are performed in normal use Only use the 12V charger provided with the DO501 kit 4 General Usage The DO501 contains sensitive electronics however the unit is robust and will stand knocks and drops Do not open the top lid of the unit as the environmental seal will be damaged and warranty voided When the probe is stored replace the protective cap provided with the kit Do not leave the probe and meter in a car or van on a hot day as excessive temperatures will dry out the fluid in the probe Treat the DO501 as a precision instrument and replace in the protective case when not in use DOS501 User Manual C 3 DOS501 User Manual 5 Specifications CONOR LY van tanvwicer orcs set andsen EN61010 EN61326 1 97 23 EC CE marked Environmental Temperature Ele CtrOniCS vivos is o eae adeees O to 50 C SOTA is io o as Cani 20
12. s required DO NOT e Direct high pressure water jets onto the probe tip as this could damage the membrane e Use abrasive wipes on the probe membrane e Clean the probe with any chemicals or solvents Allow contact with the membrane whilst calibrating the 100 point e Take readings directly after immersion in water Allow at least 3 mins for the DO probe tip and internal compensation to stabilise Use clean de ionised water to clean probe tip Use of a soft brush is advised e Position the probe in a vertical position during calibration e Allow 5 mins before calibration to allow the DOzprobe to reach equilibrium with ambient conditions e Replace the protective cap when not in use or in storage e Use water saturated air when calibrating the 100 point e Gently dry excess water from the probe tip prior to adjustment General Two calibration procedures are applicable to this instrument a full calibration and a Quick Cal daily calibration A full calibration is a two point calibration carried out at 0 saturation and 100 saturation Full calibration should be carried out at yearly intervals or whenever a new probe is fitted to the instrument Quick Cal daily calibrations are carried out only at the 100 saturation point prior to commencing work with the instrument DOS501 User Manual C 12 DO501 User Manual 17 Method Calibration should ideally be carried out in a temperature range of 15 25 C Full
13. to 50 C SOI ING isesi iesiri helenae IP65 Welgit Cap proximate cd A A A devoured 470gms Dimensions WI A A AA ARE E 100 mm CSI Earrc enesenn eee i e aee EESE mane edan 190mm Dept henti da A AA a 38mm Power supply NIMH internal Date Vina dd didnt 7 2VDC CONSUMO PON tl ib 0 05 watts Battery teat 20 Cad ls ld 120 hours Measurement parameters Probe TY DB co A Aia Sealed Galvanic Probe lead length Max movi OO 2 1m Probe operating temperature range 0cccccccncconnncnnnnnnnanannnnnnns 0 to 40 C DO FANG iii a te deen ns 0 to 40mg l DO zaccuracy instrument minus probe cceeeeeeeeees 3 rdg 0 1mg l DOsdis play resolution ria dad 0 1mg I Maximum Probe DEP A da 2 5 mtrs Pressure Sensor ACCUIACY cece cece cece eee eee eee eee rr 2 mbar Temperature ACCULACY srren atana inei a di 0 8C 6 Abbreviations Note Abbreviations are the same in singular or plural DO Dissolved Oxygen LCD Liquid Cystal Display AC Alternating Current DC Direct Current RTD Resistive Temperature Device mg l milligrams per litre 2G Degrees Celsius P C Personal Computer Kms Kilometers IP Ingress Protection gms grammes KCL Potassium Chloride mb millibar ppt Parts per Thousand 7 Initial Usage Connect the DOzprobe to the 6 way connectoron the rear of the DO501 Ensure this is only finger tight If charging is required use the charger port on the top of the unit Pressing the power switch will turn the unit on and the DO501 will go through a
14. xcludes incidental or consequential damages arising from the use of this product O amp H Designs provides a service capability for their products Replacement probes and other spare parts are available direct O amp H Designs also offers a recalibration service for all environmental parameters This can be on any interval as required by the customer 2012 O amp H Designs O amp H Designs 35 Barton Rd Barlestone dl sas i Warwickshire p www ohdesigns co u contact ohdesigns co uk CV13 OER England Tel 01455 290 620 DOS01 User Manual C 16
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