Disolved Oxygen Meter
Contents
1. 2 0 x 1 5 inches 52 x 38 mm 0 to 20 mg L 0 1 mg L 0 4 mg L 0 to 100 0 1 O 0 7 O 32 to 122 F 0 to 50 C 0 1 F or C 1 5 F 0 8 C Automatic 0 to 29 200 ft 0 to 8 900 meters 0 to 50 1 second to 8 hours 59 minutes 59 seconds Polarographic 1 GB to 16 GB Six Alkaline AA batteries or 9 VDC adapter 14 mADC normal operation with backlight off and SD card not saving data 37 mADC with backlight on and card not saving data 49 mADC with backlight on and card saving data 32 to 122 F 0 to 50 C 0 to 85 7 0 x 2 7 x 1 9 inches 177 x 68 x 45 mm 1 08 Ib 489 g 7 5 long x 1 1 across inches 190 x 28 mm 0 74 Ib 335 g 12 MAINTENANCE amp TROUBLESHOOTING TIPS Keep the probe clean and its head inside the included protective cover when not in use If the meter cannot be calibrated or if its readings are erratic first make sure that the probe head contains enough fresh electrolyte To fill the head with electrolyte follow the instructions in the Calibrating the oxygen probe section If that doesn t solve the problem replace the probe head diaphragm set In either event the next step should be to recalibrate the probe a When the icon AN appears in the left corner of the display it s time to replace the six AA batteries that power it although measurements will remain valid for several hours after the low battery indicator first appears Replacing the batteries requ2. LA Transducers amp Strain Gages lA Load Cells amp Pressure Gages 4 Displacement Transducers A Instrumentation amp Accessories FLOW LEVEL MH Rotameters Gas Mass Flowmeters amp Flow Computers MH Air Velocity Indicators MH Turbine Paddlewheel Systems 4 Totalizers amp Batch Controllers pH CONDUCTIVITY LA pH Electrodes Testers amp Accessories MA Benchtop Laboratory Meters MH Controllers Calibrators Simulators amp Pumps A Industrial pH amp Conductivity Equipment DATA ACQUISITION MH Data Acquisition amp Engineering Software MH Communications Based Acquisition Systems 4 Plug in Cards for Apple IBM amp Compatibles MA Data Logging Systems lA Recorders Printers amp Plotters HEATERS LY Heating Cable IF Cartridge amp Strip Heaters L7 Immersion amp Band Heaters LA Flexible Heaters A Laboratory Heaters ENVIRONMENTAL MONITORING AND CONTROL bd Metering amp Control Instrumentation LF Refractometers MA Pumps amp Tubing lA Air Soil amp Water Monitors LA Industrial Water amp Wastewater Treatment IF pH Conductivity amp Dissolved Oxygen Instruments M4989 0211
3. 1 second to 9 hours Automatically compensates for altitude and salt content of liquids 1 5 x 2 0 inch backlit liquid crystal display Powered by six AA batteries or optional 9 VDC adapter Readings switchable between degrees F and C OPERATING INSTRUCTIONS What s in the case The DOH SD1 comes fully assembled in a hard carrying case along with the following accessories An oxygen probe Electrolyte to fill the probe Two spare probe heads with diaphragm set A 2 GB SD memory card This user s manual Fig 1 shows all of the controls and indicators on the front back top bottom and side of the DOH SD1 Familiarize yourself with their position and function before moving on to the setup calibration procedure 1 47 BOTTOM 1 The controls and indicators and other physical features of the DOH SD1 CALLOUTS FOR FIG 1 1 1 Liquid crystal display 1 2 POWER button also controls backlight 1 3 HOLD ESC button 1 4 REC ENTER button 1 5 A button 1 6 W button 1 7 TIME button 1 8 LOGGER SET button 1 9 Kickstand 1 10 Battery compartment cover 1 11 Battery compartment cover screws 1 12 Tripod attachment nut 1 13 Socket for DO probe 1 14 Socket for 9V AC DC adapter 1 15 RESET button 1 16 RS 232 output jack 1 17 SD card socket Setup 1 Choose the power source Before using the DOH SD1 be sure it is powered by fresh batteries or an optional 9VDC AC adapter plugged into the botto
4. 59 6311899 FAX 420 59 6311114 e mail info omegashop cz Managed by the United Kingdom Office Toll Free 0800 466 342 TEL 33 0 161 37 29 00 FAX 33 0 130 57 54 27 e mail sales omega fr Daimlerstrasse 26 D 75392 Deckenpfronn Germany Toll Free 0800 6397678 TEL 49 0 7056 9398 0 FAX 49 0 7056 9398 29 e mail info omega de OMEGA Engineering Ltd One Omega Drive River Bend Technology Centre Northbank Irlam Manchester M44 5BD United Kingdom Toll Free 0800 488 488 TEL 44 0 161 777 6611 FAX 44 0 161 777 6622 e mail sales omega co uk It is the policy of OMEGA Engineering Inc to comply with all worldwide safety and EMC EMI regulations that apply OMEGA is constantly pursuing certification of its products to the European New Approach Directives OMEGA will add the CE mark to every appropriate device upon certification The information contained in this document is believed to be correct but OMEGA accepts no liability for any errors it contains and reserves the right to alter specifications without notice WARNING These products are not designed for use in and should not be used for human applications TABLE OF CONTENTS MEE UU CLA ae eh tess at kl Ste aa Aa kta sca AN do tata Lathe DN NA NG aa SAN a Ka NA a Sia 2 Key Features 3 aaa nag TENG KANG ga DA NE NA ST HE NG anes dekade 2 Operating Instructions avd 3 What sin the 958 art 3 Ne LEN a a Ba aa a a aa aa S 4 Calibrating the oxygen PO 6 Normenn se 8 Ho
5. 1 Position Daie Time Chi Valme Ch1 Unit Ch Valme Ch wit Ez 1 2009 8 12 13 36 29 78 mul 27 9 Degree C ay 2 20098412 13 38 30 7 8 m ll 279 Degree_C ET 3 20008812 13888382 48 m 208 Dogo C E 4 DORZ 13 38 34 TA my 279 Degree 6 5 2009 8412 13 38 36 76 m 27 9 Degree C 2 6 2009 12 13 38 38 76 mel 279 Degree C 3 su 7 20090812 13 38 40 75 mg L 27 9 Degree_C 9 8 20002 13 38 42 75 mgl 27 9 Degree 1 10 9 20098812 13 38 44 75 m tt 27 9 Degree C NA 10 2009 612 13 38 46 7 5 ml 279 Deue C 1 ae 11 20090812 13 39 48 75 mg L 27 9 Degree C 44 79 15 KA Ni aay wt Ro 76 MSN xs 20 7 4 pel 72 oA DHA 5 TEGNE we 6 Typical Excel mixed graphics data screen 11 SPECIFICATIONS Embedded microcontroller Display type Display size DO measurement range DO measurement resolution DO measurement accuracy Oxygen in air measurement range Oxygen in air measurement resolution Oxygen in air measurement accuracy Temperature measurement range Temperature measurement resolution Temperature measurement accuracy Compensation for temperature Compensation for altitude Compensation for liquid salt content Datalogging sampling time range DO probe type SD memory card capacity Power supply Power consumption Operating temperature Operating relative humidity Dimensions of meter dimensions Weight of meter Dimensions of probe Weight of probe Custom single chip LSI device Liquid crystal with green backlight
6. A YEAR C WARRANTY Shop online at omega Com CEOMEGA omega com e mail info omega com For latest product manuals omegamanual info MADE IN TAIWAN CE OMEGA DOH SD1 DOH SD Disolved Oxygen Meter With Data Logging SD Card omega con CEOMEGA OMEGAnet Online Service Internet e mail omega com info omega com U S A ISO 9001 Certified Canada Servicing North America Omega Engineering Inc One Omega Drive P O Box 4047 Stamford CT 06907 0047 USA Toll Free 1 800 826 6342 TEL 203 359 1660 FAX 203 359 7700 e mail info omega com 976 Bergar Laval Quebec H7L 5A1 Canada Toll Free 1 800 826 6342 TEL 514 856 6928 FAX 514 856 6886 e mail info omega ca For immediate technical or application assistance U S A and Canada Sales Service 1 800 826 6342 1 800 TC OMEGA Mexico Latin America Benelux Czech Republic France Germany Austria United Kingdom ISO 9001 Certified Customer Service 1 800 622 2378 1 800 622 BEST Engineering Service 1 800 872 9436 1 800 USA WHEN En Espafiol 001 203 359 7803 FAX 001 203 359 7807 info omega com mx e mail espanol omega com Servicing Europe Managed by the United Kingdom Office Toll Free 0800 099 3344 TEL 31 20 347 21 21 FAX 31 20 643 46 43 e mail sales omegaeng nl Frystatska 184 733 01 Karvin Czech Republic Toll Free 0800 1 66342 TEL 420
7. TY REPAIRS consult OMEGA following information available BEFORE for current repair charges Have the following contacting OMEGA information available BEFORE contacting OMEGA 1 Purchase Order number under which the product 1 Purchase Order number to cover the COST was PURCHASED of the repair 2 Model and serial number of the product under 2 Model and serial number of the product and warranty and 3 Repair instructions and or specific problems 3 Repair instructions and or specific problems relative to the product relative to the product OMEGA s policy is to make running changes not model changes whenever an improvement is possible This affords our customers the latest in technology and engineering OMEGA is a registered trademark of OMEGA ENGINEERING INC Copyright 2011 OMEGA ENGINEERING INC All rights reserved This document may not be copied photocopied reproduced translated or reduced to any electronic medium or machine readable form in whole or in part without the prior written consent of OMEGA ENGINEERING INC Where Do I Find Everything I Need for Process Measurement and Control OMEGA Of Course Shop online at omega com TEMPERATURE Zd Thermocouple RTD amp Thermistor Probes Connectors Panels amp Assemblies 4 Wire Thermocouple RTD amp Thermistor l Calibrators amp Ice Point References 4 Recorders Controllers amp Process Monitors LF Infrared Pyrometers PRESSURE STRAIN AND FORCE
8. ced at no charge OMEGA s WARRANTY does not apply to defects resulting from any action of the purchaser including but not limited to mishandling improper interfacing operation outside of design limits improper repair or unauthorized modification This WARRANTY is VOID if the unit shows evidence of having been tampered with or shows evidence of having been damaged as a result of excessive corrosion or current heat moisture or vibration improper specification misapplication misuse or other operating conditions outside of OMEGA s control Components in which wear is not warranted include but are not limited to contact points fuses and triacs OMEGA is pleased to offer suggestions on the use of its various products However OMEGA neither assumes responsibility for any omissions or errors nor assumes liability for any damages that result from the use of its products in accordance with information provided by OMEGA either verbal or written OMEGA warrants only that the parts manufactured by the company will be as specified and free of defects OMEGA MAKES NO OTHER WARRANTIES OR REPRESENTATIONS OF ANY KIND WHATSOEVER EXPRESSED OR IMPLIED EXCEPT THAT OF TITLE AND ALL IMPLIED WARRANTIES INCLUDING ANY WARRANTY OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE HEREBY DISCLAIMED LIMITATION OF LIABILITY The remedies of purchaser set forth herein are exclusive and the total liability of OMEGA with respect to this order whether based on
9. contract warranty negligence indemnification strict liability or otherwise shall not exceed the purchase price of the component upon which liability is based In no event shall OMEGA be liable for consequential incidental or special damages CONDITIONS Equipment sold by OMEGA is not intended to be used nor shall it be used 1 as a Basic Component under 10 CFR 21 NRC used in or with any nuclear installation or activity or 2 in medical applications or used on humans Should any Product s be used in or with any nuclear installation or activity medical application used on humans or misused in any way OMEGA assumes no responsibility as set forth in our basic WARRANTY DISCLAIMER language and additionally purchaser will indemnify OMEGA and hold OMEGA harmless from any liability or damage whatsoever arising out of the use of the Product s in such a manner RETURN REQUESTS INQUIRIES Direct all warranty and repair requests inquiries to the OMEGA Customer Service Department BEFORE RETURNING ANY PRODUCT S TO OMEGA PURCHASER MUST OBTAIN AN AUTHORIZED RETURN AR NUMBER FROM OMEGA S CUSTOMER SERVICE DEPARTMENT IN ORDER TO AVOID PROCESSING DELAYS The assigned AR number should then be marked on the outside of the return package and on any correspondence The purchaser is responsible for shipping charges freight insurance and proper packaging to prevent breakage in transit FOR WARRANTY RETURNS please have the FOR NON WARRAN
10. f inactivity of ten minutes 7 Enable or disable the beeper Once the auto power off function has been enabled or disabled the display will show the word yES over the word bEEP Press the W button until the desired setting yES or no is displayed and then press the REC ENTER button to store the selection 8 Choose a decimal point or comma to represent the decimal division between integers and fractions for example American style 20 88 vs European style 20 88 Once the beeper has been enabled or disabled the display will show the word bASIC above the phrase dEC Press the VW button to make bASIC American style or Euro appear in the upper display as desired Press the REC ENTER button to store the selection 9 Select the temperature unit Once the format of decimal divisions has been set and stored the display will show the term t CF Press the A or V button until your preferred unit degrees Fahrenheit F or degrees Celsius OF is displayed Then press the REC ENTER button to store the setting as the default 10 Compensate DO measurements for the presence of salt in the liquid Once the temperature unit has been selected and stored the term SaLt will appear in the lower portion of the display Press the A or V button repeatedly until the reading in the upper portion of the display matches the known percentage of salt in a liquid sample Then press the REC ENTER button to
11. has all of the features needed by an instrument suitable for precision measurement of DO levels in a wide range of applications Its 7 5 inch long polarographic electrolyte filled oxygen probe measures not only the DO concentration of a liquid but the liquid s water temperature as well The meter uses a single custom microcontroller to display readings from 0 to 20 milligrams liter mg L with a resolution of 0 1 mg L and an accuracy of 0 4 mg L Because it is microprocessor based the DOH SD1 can make full use of the portability reliability and large storage capacities that SD memory cards offer Measurements can be made automatically at any sampling rate between one second and nine hours After the instrument time stamps and stores the measurements on an SD card plugged into it a process called datalogging the user can remove the card and plug it into a laptop or desktop computer either directly or via a USB card reader The data logs are stored on the card as files with the xls extension that can be opened by Microsoft s Excel application The DOH SD1 has a backlit 1 5 x 2 0 inch display and is powered by six AA Alkaline batteries or an optional 9 VDC AC adapter KEY FEATURES Uses heavy duty polargraphic oxygen probe Precisely measures DO from 0 to 20 mg L as well as liquid temperature Easy to calibrate Supports automatic and manual datalogging Time stamps and stores measurements on SD memory cards Sampling time settable from
12. hold the LOGGER SET button again To move ahead to the next field in the sequence or to the next parameter press the HOLD ESC button Pressing the REC ENTER button causes the word no or yES to appear over the term Sd F Press the W button to make a selection Choose yES whenever a new SD card is being used or when a used card is being repurposed from use with another SD card instrument or a camera for example and all data on it is to be erased Choose no to preserve any data on a card previously used with this instrument If you choose yES after you press the REC ENTER button the instrument will prompt you to confirm that decision by displaying the term Ent below yES and sounding three beeps To confirm that you want to begin the erasure formatting procedure press the REC ENTER Ent will then flash several times and the instrument will sound another three beeps to confirm that the SD card has been erased and formatted 4 Set the date and time Once the SD card has been set up the word dAtE will appear in the center of the display along with the flashing value 00 00 00 at the lower left above yy mm dd Set the current year by pressing the V or A button repeatedly until the correct value appears above yy Press the REC ENTER button to store the setting The next screen that appears will have the value above mm flashing Use the V or A button to navigate to the c
13. ingers to press the REC ENTER and HOLD ESC buttons at the same time Release your fingers once the display shows the following indicating that air typically has an oxygen content of 20 9 20 9 CAL 10 Press the REC ENTER button The display will then count down from 30 seconds to 0 When the countdown is complete press the Function W button once to return to the normal display of mg L Normal operation 1 To measure the percentage of oxygen dissolved in a liquid Make sure that the probe is full fresh electrolyte and has been calibrated recently Remove the protective cover from the probe head Plug the probe plug into the DO probe socket at the top of the instrument Power on the DOH SD1 by pressing the POWER button on the front panel once Insert the probe at least 4 inches 10 cm into the liquid to be measured Wait a few minutes for the instrument to automatically compensate for any difference in temperature between the probe and the liquid e Read the DO content of the liquid in mg L on the upper display and its temperature on the lower display e Rinse the probe head with tap water after each measurement e Replace the probe head protection cover A DO measurement tip Agitating the liquid reduces the effect and measurement errors caused by oxygen diffusing into the liquid from ambient air At a minimum this be done by shaking the probe while it is immersed To minimize measurement errors of this tvpe Omega reco
14. ires removing the screws that hold the battery compartment cover in place After inserting fresh batteries in the correct orientation tighten the screws to secure the cover If the meter freezes like a computer and buttons become unresponsive try resetting the instrument by pushing the RESET button on its right side callout 1 15 of Fig 1 with the end of a paper clip Remove the battery when storing this product for an extended period of time Do not drop or disassemble the instrument or immerse it in water 13 REPLACEMENT PARTS amp OPTIONAL ACCESSORIES DOE SDI DOEH SD1 DOEL SD1 APAPTER ST RS232 SD Spare oxygen probe Spare probe head and diaphragm set Electrolyte for probe 9 VDC adapter for 110VAC power supply RS232 Cable 14 NOTES NOTES WARRANTY DISCLAIMER OMEGA ENGINEERING INC warrants this unit to be free of defects in materials and workmanship for a period of 13 months from date of purchase OMEGA s WARRANTY adds an additional one 1 month grace period to the normal one 1 year product warranty to cover handling and shipping time This ensures that OMEGA customers receive maximum coverage on each product If the unit malfunctions it must be returned to the factory for evaluation OMEGA s Customer Service Department will issue an Authorized Return AR number immediately upon phone or written request Upon examination by OMEGA if the unit is found to be defective it will be repaired or repla
15. lding and storing measurements 2 9 Automatic vs manual datalogging eesesesessseseesseessessseesseeessreesseesstessersseessseessseessresseessees 9 Transferring data from the SD card to a computer seeesesssseseeseessesresseserrsressereresresseseresees 10 Specifications arene o ane EE E BANG A eea EE E KANEKA KAN E SS 12 Maintenance amp troubleshooting tips sssessssssesssesssssesssressersseessseessseesseesseesseeesseesssresseesseessseesseess 13 Replacement parts amp accessories ssssssesssesessseesseessetsseesseeetsteesteessersseessteessteesstesseesseeesseessetst 14 INTRODUCTION Thank you for purchasing DOH SD1 Dissolved Oxygen Meter with Datalogging SD Card Please read this user s manual carefully and thoroughly before using the instrument Many commercial and industrial processes carefully monitor the concentration of oxygen contained in water because dissolved oxygen DO level is an excellent indicator of water quality For example if the DO level of a body of water remains too high or too low for too long fish and other aquatic organisms will die or become more susceptible to disease For quality control purposes many industries other than fish farming and water pollution control routinely measure and keep track of the DO levels of their process streams in real time Among them are food processing photography pulp and paper manufacturing power generation electroplating and facilities management The DOH SD1
16. m jack on its right side callout 1 14 To remove the battery compartment cover remove the two screws holding it in place callout 1 11 Then install six AA batteries in the correct orientation using the polarity marks on the inside of the compartment as a guide Replace the cover by replacing the two screws 2 Install an SD card To prepare for setup also install the supplied 2 GB SD memory card or another card with a capacity from 1 GB to 16 GB in the socket on the bottom of the DOH SD1 callout 3 17 When installing the card make sure its gold contacts are facing front and push the card into the socket until you hear a click To remove the card push it in until you hear a click and the card pops out Now power on the instrument by pressing the POWER button callout 1 2 to generate a short beep To power off the DOH SD1 press the POWER button and hold it until the instrument responds with a long beep When the meter powers on a series of transient startup screens will briefly appear Once the display has stabilized perform the following ten setup steps in the order presented 3 Format the SD card Press the LOGGER SET button callout 1 8 and hold it for at least five seconds until Sd F appears in the lower half of the display Quickly within three seconds press the REC ENTER button If you press buttons too slowly in setup mode the screen will revert to the normal display To return to the setup sequence press and
17. mmends using a magnetic agitator especiallv in laboratorv 2 To measure the oxygen content of a volume of air first make sure that the oxygen probe is full of fresh electrolyte calibrated and correctly inserted and that the meter is powered on Then press the W button which has the word Function stenciled above it to make the display show 0 instead of mg L Wait at least five minutes until the readings stabilize To return to mg L readings press the W button again Whenever the DOH SDI is in measurement mode you can turn off the backlight which is on by default by briefly pressing but not holding the POWER ESC button To reactivate the backlight briefly press the button again Whenever the instrument is in measurement mode you also can check the current date and time by briefly pressing the TIME button Doing so causes both values to appear briefly at the lower left of the display Holding and storing measurements 1 To hold a measured value press the HOLD ESC button during the measurement Doing so will cause the word HOLD to appear at the top of the display Pressing the HOLD ESC button again releases the hold To record and recall readings press the REC ENTER button while making measurements This will make the term REC appear at the top of the display Pressing the REC ENTER button again briefly will make the term MAK appear to the right of REC and switch the display t
18. o the maximum value stored in memory during the last recording session Pressing the REC ENTER button again briefly will make the term MIN appear to the right of REC and switch the display to the minimum value stored during the last session To exit recording mode press and hold the REC ENTER button for at least three seconds until the term REC disappears from the top line of the display The display will then revert to showing the current reading Automatic vs manual datalogging The DOH SD1 can automatically log data at a user selected sampling period from 1 second to 9 hours To view the sampling time for which the instrument was set up press the LOGGER SET button which has the words Sampling check stenciled below it once To change the sampling time perform Step 5 of the setup procedure 1 To start automatic datalogging press the REC ENTER button once The top line of the display will then show the term REC Pressing the LOGGER SET button at this point will make REC flash and add the flashing term LOGGER at the top right of the display This indicates that the instrument is currently storing measured values and their time stamps in memory To pause automatic datalogging press the LOGGER SET button once this action makes the flashing term LOGGER disappear from the top right of the display and changes the term REC from flashing to constant Pressing the LOGGER SET button again resumes aut
19. omatic datalogging To end automatic datalogging press the REC ENTER button and hold it for at least two seconds This action causes the REC message to disappear To log data manually set the sampling time to zero using Step 5 of the setup procedure Then press the REC ENTER button once The display will show the term REC on the top line a value in the middle and below it the letter P on the left and a number from 1 to 99 on the same line to the right The number indicates the position on the SD card that will be used to store manually logged data Now press the LOGGER SET button This will cause the beeper to sound even if disabled Engineering pls check Jand the term LOGGER to briefly appear at the upper right of the display As in automatic datalogging mode in this mode the instrument is storing measurements and their time stamps on the SD card In manual datalogging mode however measurements are being stored continuously with a sampling time of zero and their locations on the card can be changed 5 To change the storage location of manually logged data press the W button once this causes the P to disappear from the left side of the display and the value on its line to begin flashing Once the flashing begins you can use the W and A buttons to change the flashing value to any number between 1 and 99 Once you have chosen the storage location press the REC ENTER button to save the setting This cau
20. ses the value to stop flashing and the P to return 6 To end manual datalogging press the REC ENTER button and hold it for at least three seconds This action causes the REC message to disappear from the top line of the display Transferring data from the SD card to a computer After automatic or manual datalogging of measurements remove the SD card from the DOH SD1 and plug it into your computer either directly if it has an SD card slot or through an SD card reader Because the files containing time stamped data logs have the extension xIs they open in Microsoft s Excel application Figures 4 5 and 6 show three kinds of Excel presentations a data only screen a graphics only screen and a screen that mixes both types of content B C i E 3 G I Positon date Tine Sal Value Chl Lai Ch Aake Che wit Z 20008012 13 3329 TE mb 249 Degree C 3 2 2000812 13 32 30 18 WIE 29 eg C 3 20090812 13 35 32 LE gl 219 Deg C 5 4 OS 133554 NG mgb 29 Legr 0 6 5 200982 13 35 26 76 met GO Deg l va 6 200082 13 35 38 TG gt 29 Legere C g T 200082 13 35 20 AS WIG 29 Leg 0 q 8 009812 13 35 22 wmi 29 Deg C 0 Q 20008112 13 35 24 KI YI 49 Ceg C 11 10 200082 13 35 26 ON 29 Ters C 2 1 20098412 13 35 28 F ml 29 Cers 0 4 Typical Excel data only screen 10 7 9 7 8 7 7 76 7 5 74 7 3 72 L 2 3 4 33 2 2 MI GE 8014 5 Typical Excel graphics only screen na vkg Ha YEP KID KE YI FE FUD PEST erd
21. store this value as the temporary default until the instrument is powered off 11 Compensate DO measurements for altitude in meters Once DO measurements have been compensated for salt the term High will appear in the lower portion of the display Press the A or W button repeatedly until the reading on the upper portion of the display matches your altitude in meters Then press the REC ENTER button to store this value as the temporary default 12 Compensate DO measurements for altitude in feet Once DO measurements have been compensated for salt the term Highf will appear in the lower portion of the display Press the A or W button repeatedly until the reading on the upper portion of the display matches your altitude in feet Then press the REC ENTER button to store this value as the temporary default Once the altitude compensation in feet has been set and stored the display will then either return to the first of the ten steps in the setup sequence choosing whether or not to format the SD memory card or show the term ESC If ESC appears press the HOLD ESC button to exit the setup procedure and enter normal operating mode In this mode the display will show mg L units by default Calibrating the oxygen probe The DOH SD1 s oxygen probe must be calibrated before you use it for the first time and again before each use after a long period weeks or months of sitting idle Omega also recommends calibrating
22. the probe before making any measurements that must be extremely precise Before calibrating the probe make sure that it is full of fresh electrolyte Use the following procedure while referring to Fig 2 either to fill the probe with electrolyte or to replace old electrolyte with fresh electrolyte 1 Unscrew the probe head from the probe handle 2 Empty and dispose of any residual electrolyte from the probe head s reservoir 3 Pour fresh electrolyte into the reservoir 4 Screw the probe head back into the probe body PROBE HANDLE PROBE FILLING ELECTROLYTE IN OI pel 2 How to fill the probe head with electrolyte To calibrate the DOH SD1 use the following procedure while referring to Figures 1 and 3 CALLOUTS FOR FIG 3 3 1 Probe Plug 3 2 Probe Handle 3 3 Temperature sensing Metal 3 4 Probe Cap 3 5 Probe Head Protective Cover A gt 3 1 3 The probe s main components 5 Plug the probe plug into the DO probe socket at the top of the DOH SDI 6 Power on the instrument by pressing the POWER button on the front panel once Powering the unit through a 9V AC DC adapter an optional accessory disables the POWER button 7 Press the V button which has the word Function stenciled above it once the display will then show O instead of mg L 8 Wait at least five minutes until the display readings stabilize 9 Use two f
23. urrent month and press the REC ENTER button to store the setting When the next screen flashes the value above dd again use the V or A button to navigate to the current day and press the REC ENTER button to store the setting Once you have set the date the display will prompt you to set the hour minute and second of the current time Again use the Wor A buttons to navigate to the correct values and the REC ENTER button to store the settings 5 Set the datalogging sampling time Once the date and time have been set and stored the display will show a value below the letters SP t Press the V or A button to decrease or increase the flashing hour value until the desired number appears below SP t Press the REC ENTER button to store that setting The minutes value will then flash Press the W or A button to decrease or increase the value and then press the REC ENTER button to store that setting Finally press the W or A button to decrease or increase the flashing seconds value and then press the REC ENTER button to store that setting 6 Enable or disable auto power off Once the sampling time has been set and stored the display will show the word yES over the term PoFF Press the W button until the desired automatic power off management scheme yES for enable no for disable is displayed Press the REC ENTER button to store the selection If enabled the power off function shuts off the DOH SD1 after a period o
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