Dissolved Oxygen (DO) Meter
Contents
1. OT oe a ui 6 SDL150 EU EN V2 1 11 11 Display Backlight To turn the display backlight ON or OFF press and hold the backlight button for at least 1 5 seconds Data Hold To freeze a displayed reading on the LCD momentarily press the HOLD button the HOLD display icon will appear To release the held reading press the HOLD button again Max Min Reading Record and Recall For a given measurement session this meter can record the highest MAX and the lowest MIN readings for later recall 1 2 Press the MAX MIN button momentarily to access this mode of operation REC icon appears the meter is now recording the MAX and MIN readings Press the MAX MIN button again to view the current MAX readings MAX icon appears The readings on the display are now the highest readings encountered since the REC icon was switched on when the MAX MIN button was first pressed Press the MAX MIN button again to view the current MIN readings MIN icon appears The readings on the display are now the lowest readings encountered since the REC icon was switched on when the MAX MIN button was first pressed To exit the MAX MIN mode press and hold the MAX MIN button for at least 1 5 seconds The meter will beep the REC MAX MIN icons will switch off the MAX MIN memory will clear and the meter will return to the normal operating mode2. 7 SDL150 EU EN V2 1 11 11 Setup Mode Basic settings at a glance To view the current configuration of the meter with regard to time date and datalogging sampling rate press the SET button momentarily The meter will now display the configuration in quick succession Repeat as necessary to observe all the information Accessing the Setup mode 1 2 Press and hold the SET button for at least 1 5 seconds to access the Setup menu Press the SET button momentarily to step through the available parameters The parameter type is shown on the bottom of the LCD and the current selection for that type is shown above it When a parameter is displayed that is to be changed use the arrow keys to change the setting Press the ENTER button to confirm a change Press and hold the SET button for at least 1 5 seconds to exit the Setup mode Note that the meter automatically switches out of the Setup mode if no key is pressed within 7 seconds The available Setup parameters are listed below Additional detailed information is provided below this list dAtE Set the clock Year Month Date Hours Minutes Seconds SP t Set the datalogger sampling rate Hours Minutes Seconds PoFF Automatic power off Enable disable the auto power off function bEEP Set the beeper sound ON OFF dEC Set the numerical format USA decimal 20 00 or European comma 20 00 Sd F Format the SD memory card t CF Select the desired unit of measure for temperature C or F
3. DOA01002 xls where another 30 000 readings can be stored This method continues for up to 99 documents after which another folder is created DOA02 where another 99 spreadsheet documents can be stored This process continues in this same fashion with folders DOA03 through DOA10 last allowable folder SD Data Card to PC Data Transfer 1 Complete a datalogging session as detailed in above in the previous sections Hint For the first few tests simply record a small amount of test data This is to ensure that the datalogging process is well understood before committing to critical large scale datalogging With the meter switched OFF remove the SD Card Plug the SD Card directly into a PC SD card reader If the PC does not have an SD card slot use an SD card adaptor available at most outlets where computer accessories are sold Power the PC and run a spreadsheet software program Open the saved documents in the spreadsheet software program see example spreadsheet data screen below 11 SDL150 EU EN V2 1 11 11 Spreadsheet data example A 1 Position 2 1 3 2 Gi 3 3 4 6 5 7 6 8 7 9 8 10 9 ali 10 12 11 B Date 7 29 2011 7 29 2011 7 29 2011 7 29 2011 7 29 2011 7 29 2011 7 29 2011 7 29 2011 7 29 2011 7 29 2011 7 29 2011 RS 232 USB PC Interface The optional 407001A software kit software and cable allows streaming of data to a PC via the RS232 Output jack AC Power Adaptor G Time 13 38 00 13 38
4. SALT Salt compensation 0 to 50 HEIGHT Altitude compensation in meters up to 8900 meters HEIGHT F Altitude compensation in feet up to 29300 feet Setting the Clock Time 1 2 3 4 Access the dAtE parameter Use the arrow keys to change a value Use the ENTER button to step through the selections Press and hold the SET button for at least 1 5 seconds to exit to the normal operation mode or simply wait 7 seconds for the meter to automatically switch to the normal operating mode The clock will keep accurate time even when the meter is switched off However if the battery expires the clock will have to be reset after fresh batteries are installed Setting the Datalogger Sampling Time Rate 1 2 Access the SP t parameter The sampling rate can be set from 0 seconds manual log mode up to 8 hours 59 minutes and 59 seconds Use the ENTER button to move through the Hours Minutes and Seconds digit groups and use the arrow keys to change the digit values Press the ENTER button to confirm the entry Press and hold the SET button for at least 1 5 seconds to exit to the normal operation mode or simply wait 7 seconds for the meter to automatically switch to the normal operating mode 8 SDL150 EU EN V2 1 11 11 Enabling Disabling the Auto Power OFF Feature 1 2 Access the PoFF parameter Use the arrow buttons to select ON enable or OFF disable With the Auto Power OFF feature enabled the m
5. 1 11 11 Specifications General Specifications Display Status indicators Probe type Measurement Units Datalogger Sampling Rate Display update rate Data Output Operating Temperature Operating Humidity Auto Power OFF Power Supply Power Consumption Weight Dimensions 52 x 38mm 2 x 1 5 Backlit LCD Out of range and low battery S Polarographic type oxygen probe with temperature measurement DO Dissolved Oxygen in mg L units O2 Oxygen in air in percent units Temperature in C F units AUTO LOGGING From 1 second to 8 hours 59 minutes and 59 seconds Note that a one 1 second sampling rate can cause some data loss on slower computers Memory Card SD Cards 1G to 16GB Approx 1 second RS 232 USB PC computer interface 0 to 50 C 32 to 122 F 85 R H max After 10 minutes of inactivity can be disabled Six 6 1 5 VDC batteries optional 9V AC adaptor Normal operation backlight and datalogger OFF approx 14mAdc With backlight OFF and datalogging ON approx 37mAdc With backlight ON add approx 12mAdc 362g 0 79 Ibs meter only Main instrument 182 x 73 x 47 5mm 7 1 x 2 9 x 1 9 Probe 190 x 28 mm 7 5 x 1 1 diameter Electrical Specifications ambient temperature 23 C 5 C Measurement Range Resolution Accuracy Dissolved Oxygen DO 0 to 20 0 mg L 0 1 mg L 0 4mg L Oxygen in air 0 to 100 0 0 1 02 0 7 02 Temperature 0 to 50 C 3
6. the UP and DOWN arrow buttons until CAL 0 appears in the lower portion of the display Release the UP and DOWN arrow buttons calibration is complete 5 SDL150 EU EN V2 1 11 11 Probe Maintenance First time use Before first use ensure that the probe is filled with the supplied electrolyte solution refer to the electrolyte filling instructions later in this guide Subsequent uses 1 Ensure proper electrolyte level in probe 2 Calibrate the probe with the meter before each use 3 Replace the probe head and diaphragm if the diaphragm appears soiled re calibrate after replacing diaphragm Diaphragm considerations The main oxygen probe component is the thin Teflon diaphragm housed in the tip of the supplied probe The diaphragm is made permeable by the oxygen molecules but not by the considerably larger molecules contained in the electrolyte Due to this characteristic the oxygen may diffuse throughout the electrolyte solution contained in the probe and its concentration is quantified by the meter s measurement circuitry Refilling the Probe s Electrolyte Refer to the illustrated instructions below 1 Unscrew the probe head 2 Pour out the old electrolyte from the probe head container 3 Fill the probe head container with the fresh electrolyte 4 Replace the probe head onto the probe body 5 When not in use the probe head should be kept in the protective cover
7. to be achieved In laboratory environments use of a magnetic agitator to ensure proper velocity is recommended In this way errors due to the diffusion of the oxygen present in the surrounding air are minimized The Dissolved Oxygen measurements are displayed on the upper larger digit display area of the meter s LCD Measurements outside of the specified range will yield dashes Temperature measurements are displayed in the range of 0 to 50 C 32 to 122 F on the lower LCD line in smaller sized digits SALT Altitude height compensation temperature units of measure and other parameters can be modified in the SETUP mode refer to the SETUP mode section later in this guide Taking Oxygen in Air Measurements 1 2 The probe measures Oxygen in the air surrounding the probe in percent The meter defaults to the DO measurement mode Therefore press and hold the FUNCTION button for 1 5 seconds to switch to the 02 mode oxygen in air The displayed unit of measure will switch from mg L to 02 To return to the DO measurement mode simply press and hold the FUNCTION button again for 1 5 seconds The Oxygen in Air measurements are displayed on the upper larger digit display area of the meter s LCD Measurements outside of the specified range will yield dashes Temperature measurements are displayed in the range of 0 to 50 C 32 to 122 F on the lower LCD line in smaller sized digits 4 SDL150 EU EN V2 1 11 11 C
8. 01 13 38 02 13 38 03 13 38 04 13 38 05 13 38 06 13 38 07 13 38 08 13 38 09 13 38 10 D E F G Chi Value Ch1_Unit Ch2 Value Ch2 Unit 7 8 mg L 20 9 Degree C 7 8 mg L 20 9 Degree C 7 8 mg L 20 9 Degree C 7 8 mg L 20 9 Degree C 7 8 mg L 20 9 Degree_C 7 8 mg L 20 9 Degree C 7 8 mg L 20 9 Degree C 7 8 mg L 20 9 Degree C 7 8 mg L 20 9 Degree C 7 8 mg L 20 9 Degree C 7 8 mg L 20 9 Degree C This meter is normally powered by six 6 1 5V AA batteries An optional 9V power adaptor is available When the adaptor is used the meter is permanently powered and the power button will be disabled Battery Replacement and Disposal When the low battery icon ox appears on the LCD the batteries must be replaced Several hours of accurate readings are still possible in this condition however batteries should be replaced as soon as possible 1 Remove the two 2 Phillips screws from the rear of the meter directly above the top of the tilt stand 2 Remove and safely place the battery compartment and screws where they will not be damaged or lost led Replace the six 6 1 5V AA batteries observing polarity Replace the battery compartment cover with the two 2 Phillips screws All EU users are legally bound by the battery ordinance to return all used batteries to collection points in your community or wherever batteries accumulators are sold Disposal in the household garbage is prohibited 12 SDL150 EU EN V2
9. 2 to 122 F 0 1 C F 0 8 C 1 5 F Probe Compensation Adjust Salt 0 to 50 Height Altitude 0 to 8900m 29 300 ft Copyright 2011 Extech Instruments Corporation a FLIR company All rights reserved including the right of reproduction in whole or in part in any form www extech com 13 SDL150 EU EN V2 1 11 11
10. ER to confirm selection Press ENTER again to re confirm The meter will automatically return to the normal operating mode when formatting is complete If not press and hold the SET button for at least 1 5 seconds to exit to the normal operation mode Set the Temperature Units of Measure C or F 1 2 3 4 Access the t CF parameter Use the arrow keys to select C or F Press ENTER to confirm setting Press and hold the SET key for at least 1 5 seconds to exit to the normal operation mode or simply wait 7 seconds for the meter to automatically switch to the normal operating mode Set the SALT Compensation 1 2 3 4 Access the SALT parameter Use the arrow keys to select the SALT compensation 0 to 50 Press ENTER to confirm setting Press and hold the SET key for at least 1 5 seconds to exit to the normal operation mode or simply wait 7 seconds for the meter to automatically switch to the normal operating mode 9 SDL150 EU EN V2 1 11 11 Set the Altitude Compensation in meters for DO measurements only 1 2 3 4 Access the Height parameter Use the arrow keys to select the altitude compensation 0 to 8900 meters in 100 meter steps Press ENTER to confirm setting Press and hold the SET key for at least 1 5 seconds to exit to the normal operation mode or simply wait 7 seconds for the meter to automatically switch to the normal operating mode Set the Altitude F Compensation in fee
11. User s Guide EXTECH S a INSTRUMENTS A FLIR COMPANY Dissolved Oxygen DO Meter SD Card real time Datalogger Model SDL150 Introduction Congratulations on your purchase of the Extech SDL150 Dissolved Oxygen Meter an SD Logger Series meter This meter displays and stores Dissolved Oxygen readings in the 0 to 20 0mg L range Oxygen in air from 0 to 100 and Temperature from 0 to 50 C 32 to 122 F The SDL150 uses a polarographic oxygen probe that also measures temperature Salt and Altitude compensation can be fine tuned by the user in the Setup mode Logged data readings are stored on an SD card for transfer to a PC In addition an RS232 port allows data streaming to a PC This meter is shipped fully tested and calibrated and with proper use will provide years of reliable service Safety International Safety Symbols A This symbol adjacent to another symbol or terminal indicates the user must refer to the manual for further information Meter Description 1 2 Q ON Oy OR 10 11 12 13 14 15 Notes Oxygen Probe Input Plug Dissolved Oxygen or Oxygen in Air reading Temperature reading Power ON OFF D key SET and Clock key Up arrow A CAL key Down arrow W Function key ENTER and LOG key SD card slot Dissolved Oxygen Temperature Probe HOLD and Backlight key MAX MIN key PC interface jack Reset button Pow
12. alibration 20 9 Oxygen in Air Calibration OO YN S N Connect the DO probe to the input jack at the top of the meter Power the meter by pressing and holding the power button for 1 5 seconds Press and hold the FUNCTION button for 1 5 seconds to switch from mg L mode to O2 mode Allow the probe to stabilize for at least 5 minutes in a large well ventilated environment Press and hold the CAL button for 1 5 seconds The CAL icon will appear Momentarily press the ENTER button while the CAL icon is displayed The display will indicate a countdown from 30 to zero Note that if the ENTER button is not pressed while the CAL icon is being displayed the calibration procedure must be attempted again When the countdown finishes the calibration is complete If the calibration is unstable check the electrolyte level and or replace the probe head includes diaphragm Zero Calibration The 0 calibration is available for high accuracy measurements at low O levels The calibration requires a Zero Oxygen Solution which can be purchased from most laboratory supply distributors This calibration is not required for typical O measurements 1 2 Power the meter on and set it to DO mode you should see mg L in the top right of display Immerse the probe in 4 of zero oxygen solution agitate or slowly stir the probe in the solution to remove any air bubbles and allow the reading to stabilize Once the reading has stabilized press and hold
13. be The supplied probe connects to the keyed input jack DIN style at the top of the meter Measurement Ranges Dissolved Oxygen measurements are displayed in the range of 0 to 20mg L in the upper larger digit display area of the meter s LCD Measurements outside of this range will yield dashes on the meter s LCD Oxygen in Air measurements O2 are displayed in the range of 0 to 100 Temperature measurements are displayed in the range of 0 to 50 C 32 to 122 F on the lower LCD line in smaller sized digits Calibration Considerations For best accuracy calibrate the meter with the probe before each use The calibration should at be performed before first use and after long periods of non use The calibration procedure is provided in a later section of this user guide 3 SDL150 EU EN V2 1 11 11 Taking Dissolved Oxygen Measurements 1 Immerse the DO probe into the solution under test to a depth of at least 10cm The depth specification is important since the temperature measurement of the solution and the automatic temperature compensation circuitry rely on the probe depth to operate correctly Allow the test to stabilize for several minutes to achieve thermal equilibrium between the probe and measurement sample To successfully measure DO the velocity of the solution striking the probe must be at least 0 2 0 3m s meters per second if not simply agitate the solution with the probe while waiting for thermal equilibrium
14. er Adaptor jack i a5 TE QW Dissolved Oxygen 50150 Meter ON On A 9 Items 13 14 and 15 are located behind the snap off compartment cover on meter s right side Battery compartment tilt stand and tripod mount are located on the rear of the instrument SDL150 EU EN V2 1 11 11 Probe Description 1 Probe to meter input plug R N 2 Probe body handle H 3 Temperature Sensor 1 FH 4 Probe head Fo 5 Protective cap f 3 4 Getting Started E Accessories e The SDL150 includes batteries SD card probe with spare probe head and diaphragm electrolyte and carry case If items are missing please contact the distributor through which this product was purchased e Optional AC adaptor and universal AC adaptors UK EU US as well as replacement probes membranes and electrolyte are available through Extech distributors Power ON OFF e Press and hold the power button for at least 1 5 seconds to power ON the meter e Press and hold the power button for 1 5 seconds to power OFF the meter e This meter is powered by six 6 1 5VDC AA batteries or by optional AC adaptor If the meter will not switch ON please check that fresh batteries are installed in the rear battery compartment or in the case of the AC adaptor check that the adaptor is connected correctly to the meter and to an AC source Measurements Connect the Oxygen Pro
15. eter will automatically switch OFF after 5 minutes of inactivity Press ENTER to confirm setting Press and hold the SET button for at least 1 5 seconds to exit to the normal operation mode or simply wait 7 seconds for the meter to automatically switch to the normal operating mode Set the Beeper Sound ON or OFF 1 2 3 4 Access the bEEP parameter Use the arrow buttons to select ON enable or OFF disable Press ENTER to confirm setting Press and hold the SET button for at least 1 5 seconds to exit to the normal operation mode or simply wait 7 seconds for the meter to automatically switch to the normal operating mode Numerical Format comma or decimal European and USA numerical formats differ The meter defaults to USA mode where a decimal point is used to separate units from tenths i e 20 00 The European format uses a comma i e 20 00 to separate units from tenths To change this setting 1 2 3 4 Access the dEC parameter Use the arrow buttons to select USA or EUro Press ENTER to confirm setting Press and hold the SET button for at least 1 5 seconds to exit to the normal operation mode or simply wait 7 seconds for the meter to automatically switch to the normal operating mode SD Card FORMATTING 1 2 Access the Sd F parameter Use the arrow buttons to select YES to format the card select NO to abort Note that all data on the card will be lost if formatting is attempted Press ENT
16. g rate onto an SD memory card The meter defaults to a sampling rate of one second To change the sampling rate refer to the Setup Mode section the sampling rate cannot be 0 for automatic datalogging 1 2 Select the sampling rate in the Setup Mode refer to Setup Mode section to a value other than zero Press and hold the LOG button for at least 1 5 seconds The meter will flash the DATALOGGER icon at the selected sampling rate indicating that readings are now being automatically recorded to the SD card If a card is not inserted or if the card is defective the meter will display EMPTY In this case switch the meter OFF and try again with a valid SD card Pause the datalogger by pressing the LOG button momentarily The DATALOGGER icon will stop flashing and the sample rate will display for a short time To resume logging simply press the LOG button again momentarily To terminate the datalogging session press and hold the LOG button for at least 1 5 seconds When an SD card is used for the first time a folder is created on the card and named DOA01 Up to 99 spreadsheet documents each with 30 000 readings can be stored in this folder When datalogging begins a new spreadsheet document named DOA01001 xIs is created on the SD card in the DOA01 folder The data recorded will be placed in the DOA01001 xIs document until 30 000 readings are reached If the measurement session exceeds 30 000 readings a new document will be created
17. t for DO measurements only 1 2 3 4 Access the Height F parameter Use the arrow keys to select the altitude compensation 0 to 29 300 feet in 100 feet steps Press ENTER to confirm setting Press and hold the SET key for at least 1 5 seconds to exit to the normal operation mode or simply wait 7 seconds for the meter to automatically switch to the normal operating mode System Reset If the meter s keys become inoperable or if the display freezes the Reset button can be used to reset the instrument 1 Use a paper clip or similar item to momentarily press the reset button located on the lower right side of the instrument under the snap off compartment cover 2 After pressing the Reset button switch the instrument ON by pressing and holding the POWER key for at least 1 5 seconds If using the power adaptor unplug the adaptor and then plug it back in again to power the meter Datalogging Types of Data Recording Manual Datalogging Manually log up to 99 readings onto an SD card via push button press Automatic Datalogging Automatically log data onto an SD memory card where the number of data points is virtually limited only by the card size Readings are logged at a rate specified by the user SD Card Information Insert an SD card from 1G size up to 16G into the SD card slot at the bottom of the meter The card must be inserted with the front of the card label side facing toward the rear of the meter If
18. the SD card is being used for the first time it is recommended that the card be formatted and the logger s clock set to allow for accurate date time stamping during datalogging sessions Refer to the Setup Mode section for SD card formatting and time date setting instructions European and USA numerical formats differ The data on the SD card can be formatted for either format The meter defaults to USA mode where a decimal point is used to separate units from tenths i e 20 00 The European format uses a comma i e 20 00 To change this setting refer to the Setup Mode section 10 SDL150 EU EN V2 1 11 11 Manual Datalogging In the manual mode the user presses the LOG button to manually log a reading onto the SD card 1 2 Set the sampling rate to 0 seconds as described in the Setup Mode section Press and hold the LOG button for at least 1 5 seconds and the DATALOGGER icon will appear on the LCD the lower portion of the display will show P N N memory position number 1 99 Momentarily press the LOG button to store a reading The DATALOGGER icon will flash each time a data point is stored Use the A and W buttons to select one of the 99 data memory positions in which to record To exit the manual datalogging mode press and hold the LOG button for at least 1 5 seconds The DATALOGGER icon will switch off Automatic Datalogging In automatic datalogging mode the meter takes and stores a reading at a user specified samplin
Download Pdf Manuals
Related Search