pH, ORP, Conductivity, TDS, Salt, DO Meter
Contents
1. PH e Temperature unit of C e Manual temperature compensation e Auto power off e Sampling time of 2 seconds To change any of these parameters use the specific procedure for it detailed earlier in the Setup section To make the pH measurement hold the pH electrode by its handle and immerse it in the solution under test If you are using the ATC temperature probe immerse its head in the solution as well Gently shake the electrode and probe if used to help any air bubbles escape and to ensure an accurate reading The display will simultaneously show the solution s pH in the center and either the manually selected compensation temperature or the actual temperature of the solution as measured by the ATC probe below it By default the temperature reading will be in C unless F has been selected 3 To measure the ORP of a solution power on the meter and make sure that it is operating in pH measurement mode Then press the W or A button to make the display show the term mV Next obtain an ORP electrode with a BNC connector and plug it into the same socket on the top of the meter callout 1 16 of Fig 1 that accepts the plug of a pH electrode Holding the ORP electrode by its handle immerse it in the solution under test Gently shake the head of the electrode to help any air bubbles escape and to ensure an accurate reading The display will show the ORP of the solution in mV 4 To measure the conductivity of a soluti2. and then press the REC ENTER button to store the selection as the default 8 Choose a decimal point or comma Once the beep sound has been enabled or disabled the display will show the word bASIC above the phrase dEC The next step in the setup sequence determines whether displayed values use a period or a comma to represent the decimal division between integers and fractions for example American style 20 88 vs European style 20 88 Press the W button to make bASIC American style or Euro appear in the upper display as desired Press the REC ENTER button to store the selection as the default 9 Select the temperature unit Once the format of decimal point divisions has been set and stored the lower portion of the display will show the term t CF Press either the Y or A button to change the letter displayed at the right of the display to C for Celsius units or F for Fahrenheit units as desired Then press the REC ENTER button to store the selection as the default 10 Set the optional DO probe s level of compensation for salt in the solution when operating in DO measurement mode The default value is 0 by weight The level of compensation is adjustable between 0 and 50 Once the display temperature unit has been set and stored the lower portion of the display will show the term SALt Press either the W or A button repeatedly until the value above SALt matches the desired compen
3. 1 YEAR C WARRANTY Shop online at omega com e mail info omega com _ for latest product manuals www omegamanual info MADE IN TAIWAN KOLO REC Esc _ ENTER MODE Legge check SD Card Data Logger pH ORP DO CD TDS SALT METER fEOMEGA HHWT SD1 HHWT SD1 pH ORP Conductivity TDS Salt and DO Meter with Data Logging SD Card CE OMEGA omega com info omega com Servicing North America U S A Omega Engineering Inc One Omega Drive P O Box 4047 Stamford CT 06907 0047 USA Toll Free 1 800 826 6342 USA amp Canada only Customer Service 1 800 622 2378 USA amp Canada only Engineering Service 1 800 872 9436 USA amp Canada only Tel 203 359 1660 Fax 203 359 7700 e mail info omega com For Other Locations Visit omega com worldwide 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 Introduction cc ccccceca ca caeeeaeeeneeeneetnees 3 Key Features 1 cccuueneenenneneeeenaeneeee 4 Operating Instructions 0cccneaaas 4 16 What s in the case 00c cece cues 4 5 SOL eee ee ene oe ee eee 6 8 Calibrating a pH Electrode 8 9 Calibrating the Conductivity TDS Salt Probe 0c cece e
4. 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 button Ent will then flash several times and the meter 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 formatted the meter will automatically move to the next step in the startup sequence setting the current date and time When the word dAtE appears 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 W 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 W or A button to navigate to the current month and press the REC ENTER button to store the setting When the next screen flashes the value above dd again use the W 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 wil
5. 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 HHWT 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 13 setup steps in the order presented 3 Format the SD card The first step in the setup procedure determines whether or not to format the SD memory card plugged into the instrument 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 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
6. again until this screen appears Press the 10 00 REC ENTER button to calibrate the electrode for pH 10 CAL a 10 The pH electrode has now been calibrated once To maximize measurement accuracy Omega recommends rinsing the head of the electrode and the head of the ATC temperature probe if used in distilled water and then repeating the above steps at least twice more 11 To recalibrate the electrode in the future you must clear the existing settings To do so press the W or A button until this screen appears Then press the REC ENTER button to clear the saved settings before CLr repeating the steps above to calibrate the electrode for pH 7 pH 4 CAL and pH 10 CALIBRATING THE CONDUCTIVITY TDS SALT PROBE The following procedure is sufficient to calibrate the supplied conductivity TDS salt probe so it accurately measures all three parameters 1 Obtain the correct standard conductivity solution s for the full scale range s you expect to use For example if you expect to measure conductivity values using a full scale range of 2 mS use a 1 413 mS standard conductivity solution For measurements within the 200 uS full scale range obtain and use an 80 uS standard solution 2 Plug the probe into its dedicated socket on the top of the meter callout 1 15 of Fig 1 Then power on the meter and push the W button which has the word MODE stenciled above it until the display shows the term Cd 3 10 perform the calibration i
7. batteries when storing this product for an extended period of time Do not drop or disassemble the instrument or immerse it in water OPTIONAL ACCESSORIES e pH electrodes e pH 4 pH 7 and pH 10 buffer solutions e ORP electrode e DO probe e DO probe filling electrolyte e Spare DO probe and diaphragm set e ATC temperature probe e 9 VDC adapter for a 110VAC power supply 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 s 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 replaced 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 cu
8. 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 Fig 3 How to fill an oxygen probe s head with electrolyte PROBE PLUG PROBE HANDLE f gt ry I A m a kS k LS F 7 Fa 4 J i F i p a al TE PROBE FILLING ELECTROLYTE To calibrate an oxygen probe use the following procedure 1 while referring to Figures 1 and 4 Fig 4 An oxygen probe s main components 4 1 Probe plug 4 2 Probe handle 4 3 Temperature sensing metal 4 4 Probe cap 4 5 Probe head protective cover 1 Plug the probe plug into the DO probe socket callout 1 14 of Fig 1 on the top of the meter 2 Power on the instrument by pressing the POWER button on the front panel 3 Press the A button which has the word MODE stenciled above it until the display shows the term do 4 Press the V button which has the word Function stenciled above it to switch the unit shown on the display from mg L to 02 5 Wait at least five minutes until the display readings stabilize 6 Use two fingers to press the REC ENTER and HOLD ESC buttons at the same time 7 Release your fingers once this screen appears indicating that air typically has ee an oxygen content of 20 9 8 Press the R
9. power off beep sound sampling time decimal point or comma decimal division temperature unit compensation temperature Also salt and altitude compensation DO mode only 32 to 122 F 0 to 50 C 0 to 85 6 Alkaline AA batteries or optional 9 VDC AC adapter 14 mADC normal operation with backlight off and SD card not saving data 37 mADC with backlight on and card saving data 49 mADC with backlight on and card saving data 6 97 x 2 68 x 1 77 in 177 x 68 x 45mm 1 08 Ib 4899 MAINTENANCE amp TROUBLESHOOTING TIPS Keep all probes and electrodes clean and protected from the elements when not in use When a pH electrode is not being used Omega recommends keeping its head inserted in the bottle of pH buffer solution When the icon X appears in the left corner of the display it s time to replace the six AA batteries that power the instrument although measurements will remain valid for several hours after the low battery indicator first appears Replacing the batteries requires removing the two screws that hold the battery compartment cover in place in Step 1 of the setup procedure on page 6 After inserting fresh batteries in the correct orientation tighten the screws to secure the cover lf 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
10. 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 HHWT SD1 can automatically log data at a user selected sampling period from 1 second to 9 hours To view the sampling time that the instrument has been set up to use 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 2 10 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 automatic datalogging 3 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 4 To log data manually set the sampling time to zero using the procedure detailed earlier Th
11. 52 as 17 Depe C the REC ENTER button to save the 12 1F OWEN 31638 Ty ft us 4d Dems 0 setting This causes the value to stop flashing and the P to return Fig 5 Typical Excel data only screen 6 To end manual datalogging press the REC ENTER button and hold it for at least three seconds BS This action causes the REC 134 message to disappear from the 733 top line of the display 139 73 TRANSFERRING DATA a FROM THE SD CARD TO A COMPUTER if bs amp SS 8 F FF BH After automatic or manual Fig 6 Typical Excel graphics only screen datalogging of measurements remove the SD card from the meter eS See ee er ae a a H and plug it into your computer either gi i a as al E directly if it has an SD card slot or 45 mwsu mwa ti s 247 Deures C through an SD card reader E ae ee Because the files containing time Bal sues Geseal ead eal tetra stamped data logs have the file ag eel ee ee extension xls they open in ate E Microsoft s Excel application I MOWAT TLIAR 719 ug I Mepree l Figures 5 6 and 7 show three kinds l5 of Excel presentations a data only 17 screen a graphics only screen ei and a mixed data graphics screen ni a T 25 T5 Fig 7 Typical Excel mixed data graphics screen SPECIFICATIONS Embedded microcontroller Display type Display size Parameters measured Measurement range Measurement accuracy Measurement resolution Temperature compensation Storable recallable read
12. EC ENTER button The display will then count down from 30 seconds to 0 9 When the countdown is complete press the V button once to return to the normal display of mg L NORMAL OPERATION The HHWT SD1 can operate in any of four measurement modes selectable by pressing the Y button which has the word Function stenciled above it Pressing the button repeatedly cycles through the modes and produces the following on screen text e PH for measuring the pH or ORP of a solution e Cd for conductivity and TDS measurements e SALt for measuring the salt content of a solution by weight e do for dissolved oxygen measurements 1 To select the measurement mode press the V button which has the word Function stenciled above it repeatedly until the term for the desired measurement mode appears 2 To measure the pH of a solution power on the meter and press the W button until the display shows the term PH Obtain a pH electrode and seat it firmly in the BNC socket callout 1 16 of Fig 1 on the top of the meter If an ATC temperature probe is being used make sure it is seated firmly in its socket callout 1 13 of Fig 1 on the top of the meter as well If an ATC probe is not being used perform Step 15 of the setup procedure to manually match the compensation temperature to the temperature of the solution being tested Following are the default states for the HHWT SD1 in pH measurement mode e The display shows
13. and 3 Repair instructions and or specific 3 Repair instructions and or specific problems 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 2014 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 Find Everything Need for Process Measurement and Control OMEGA Of Course Shop online at omega com TEMPERATURE 4 Thermocouple RTD amp Thermistor Probes Connectors Panels amp Assemblies L Wire Thermocouple RTD amp Thermistor L Calibrators amp Ice Point References LY Recorders Controllers amp Process Monitors L Infrared Pyrometers PRESSURE STRAIN AND FORCE L Transducers amp Strain Gages M Load Cells amp Pressure Gages LY Displacement Transducers L Instrumentation amp Accessories FLOW LEVEL L Rotameters Gas Mass Flowmeters amp Flow Computers Air Velocity Indicators L Turbine Paddlewheel Systems L Totalizers amp Batch Controllers pH CONDUCTIVITY LM pH Electrodes Testers amp Accessories LY Benchtop Laboratory Mete
14. e set manually pH electrodes must be calibrated for pH 4 pH 7 and pH 10 using buffer solutions as do conductivity TDS salt probes and oxygen probes using their own standard solutions Among the applications and environments suitable for the HHWT SD1 are water conditioning wastewater monitoring beverage production aquaculture fish farming aquariums pulp and paper processing electroplating and photography The HHWT SD1 has the performance and features needed to satisfy the most demanding aspects of the above applications A front panel pushbutton enables rapid switching among the meter s four measurement modes Because it is microprocessor based the HHWT 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 time stamping and storing the measurements on an SD card plugged into the meter a process called datalogging the user can remove the card and plug it into to 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 which can be opened by Microsoft s Excel application The HHWT SD1 has a backlit 2 1 2 in diagonal display and is powered by six AA Alkaline batteries or an optional 9 VDC AC adapter KEY FEATURES e Measures pH ORP and conductivity and TDS salt and DO content using
15. ee ees 10 Calibrating an Oxygen Probe 10 11 Normal Operation 00000ee 12 14 Holding and Storing Measurements 15 Automatic vs Manual Datalogging 15 16 Transferring Data from the SD Card toa Computer cece 16 Specifications cce eee eee eee 17 Maintenance amp Troubleshooting Tips 18 Optional AccessorieS 000ccaeeenaaaee 18 INTRODUCTION Thank you for purchasing Omega s HHWT SD1 pH ORP Conductivity TDS Salt and DO Meter with Datalogging SD Card Please read this user s manual carefully and thoroughly before using the instrument The HHWT SD1 is a general purpose handheld instrument capable of measuring the pH oxidation reduction potential ORP or conductivity of a solution as well as its TDS total dissolved solids DO dissolved oxygen or salt content Using an included conductivity TDS salt probe an optional DO probe and optional ORP and pH electrodes the meter can measure pH from 0 to 14 ORP from 1999 mV to 1999 mV conductivity up to 200 mS milliSiemens TDS up to 132 000 ppm DO up to 20 mg L and salt content up to 12 by weight The meter also accepts an optional automatic temperature compensation ATC probe that configures a pH electrode to measure solutions at temperatures between 32 and 150 F 0 and 65 C For measuring the pH of solutions at temperatures between 32 and 212 F 0 and 100 C the temperature compensation can b
16. en 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 and 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 A B C D E F C of manually logged data press l Peszen D T Ch Yaw Col Unit Ch Value Ch atit the W button once this causes the beets o SEE N E WES P to disappear from the leftside inei n E Be ee of the display and the value on its eat en aH Suh De Age lid 1AF us 74 Deket line to begin flashing Once the S MOMENT 3EM Td s 245 Degree flashing begins you can use the s 6 RAF IXE BS i Po Deae V and A buttons to change the E T AWR Gd aal as HF Deps C flashing value to any number J 6 Ab IIe d as ado Degree between 1 and 99 Once you have 9 sei lest TS w Haj Deans chosen the storage location press SSi le Sa as Sin Dumi MOAN 13 18 56
17. f a solution power on the meter and press the W button until the display shows the term Cd indicating operation in conductivity measurement mode Then press the press the W or A button until the term tdS appears Next press the REC ENTER button to store the setting as the temporary default Finally plug a conductivity TDS salt probe into its dedicated socket callout 1 15 of Fig 1 on the top of the meter To make the TDS measurement hold the conductivity probe by its handle and immerse it in the solution under test Gently shake the head of the probe to help any air bubbles escape and to ensure an accurate reading The display will show both the TDS of the solution in uS or mS and its temperature 6 To measure the salt content of a solution power on the meter and press the W button until the display shows the term Cd again indicating operation in conductivity measurement mode Then press the W or A button until the term SALt appears Next press the REC ENTER button to store the setting as the temporary default To make the salt content measurement hold the conductivity probe by its handle and immerse it in the solution under test Gently shake the head of the probe to help any air bubbles escape and to ensure an accurate reading The display will show the salt content of the solution as a by weight value 7 To measure the DO content of a liquid power on the meter and press the W button until the display shows
18. included and optional electrodes and probes e Measured parameter can be changed by pressing front panel buttons e DO measurements can be compensated for salt altitude and temperature e Also measures oxygen content of a volume of air e Optional ATC probe automatically temperature compensates pH electrode e Displays maximum and minimum readings e Performs real time automatic datalogging at sampling time settable from 1 second to 9 hours e Also supports manual logging and changing of card storage location e Outputs Excel compatible data logs e Accepts SD memory cards of up to 16 GB capacity e Big 2 5 in diagonal front panel green backlit LCD is easy to read e Auto power off function e Powered by six AA batteries or optional 9V AC DC adapter OPERATING INSTRUCTIONS WHAT S IN THE CASE The HHWT SD1 comes fully assembled in a hard carrying case along with a conductivity TDS salt probe a 2 GB SD card and this user s manual Optional accessories available from Omega include e pH and ORP electrodes e A probe for automatic temperature compensation ATC of pH electrodes e A DO probe e pH 4 and pH 7 buffer solutions e A 1 413 uS microSiemens standard conductivity solution e A probe tfilling electrolyte e A spare DO probe and diaphragm set e A 9VDC adapter for a 110V power supply see the Optional Accessories section of this manual for more details Figure 1 shows all of the controls and indicators on the front back top b
19. ings Datalogging sampling time SD card capacity settable parameters Operating temperature Operating relative humidity Power source Power consumption Dimensions of meter Weight of meter Custom one chip LSI device Liquid crystal with green backlight 2 05 x 1 5 in 52 x 38mm pH ORP conductivity TDS DO content salt content 0 to 14 for pH 1999 mV to 1999 mV for ORP conductivity up to 200 mS milliSiemens TDS up to 132 000 ppm DO up to 20 mg L salt content up to 12 by weight 0 02 pH units 2 digits for pH 0 5 of reading 2 digits for ORP 2 of full scale reading 1 digit for conductivity and TDS 0 8 C 1 5 F for temperature 0 4 mg L for DO in solution and 0 1 for oxygen in air 0 5 of value for salt 0 01 unit for pH 1 mV for ORP for conductivity 0 1 uS 200 uS full scale f s 0 001 mS 2 mS f s 0 01 mS 20 mS f s 0 1mS 200 mS f s for TDS 0 1 ppm 200 ppm f s 1 ppm 2 000 ppm f s 10 ppm 20 000 ppm f s 100 ppm 100 000 ppm f s 0 1 F 0 1 C for temperature 0 1 mg L for DO in solution and 0 1 for oxygen in air 0 01 of reading for salt Automatic between 32 and 150 F 0 and 65 C when using optional ATC temperature probe manually settable between 32 and 212 F 0 and 100 C without ATC probe Maximum minimum settable between 1 second and 8 hours 59 minutes 59 seconds in automatic datalogging mode 1 GB to 16 GB Date time auto
20. l prompt you to set the hour minute and second of the current time Again use the W or 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 W 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 HHWT SD1 after a period of inactivity of ten minutes 7 Enable or disable the beeper Once the auto power off scheme has been chosen and Stored the display will show the word yES over the word bEEP Press the W button until the desired setting yES or no is displayed
21. mmerse and shake the head of the probe in the standard solution The display will show its conductivity in units of uS or mS 4 Once a value is displayed use two fingers to press the REC ENTER and HOLD ESC buttons simultaneously 5 When this screen appears release both fingers Then press the REC ENTER button The display will then switch into a two level Cd upper and lower mode that looks like this CAL 1 318 1 41 Standard value 1 318 1 318 6 Press the V or A button to raise or lower the measured value until it matches the standard conductivity value 7 Complete the calibration procedure by pressing the REC ENTER button If you expect to make conductivity readings using other full scale ranges you should repeat this calibration procedure using other standard conductivity solutions of appropriate strength If you do Omega advises performing the above procedure for a 2 ms full scale range first CALIBRATING AN OXYGEN PROBE An optional oxygen probe must be calibrated before you use it for the first time and again after a long period weeks or months of sitting idle Omega also recommends calibrating an oxygen probe before making any measurements that must be extremely precise Before beginning the calibration procedure make sure that the oxygen probe is full of fresh electrolyte Use the following steps while referring to Fig 3 below either to fill the probe with electrolyte or to replace old electrolyte with fresh
22. n again to make the display read 02 instead of mg L Wait at least five minutes until the display reading stabilizes To return to mg L readings press the W button again Whenever the HHWT SD1 is in any 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 any 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 14 HOLDING AND STORING MEASUREMENTS 1 To hold a measured value of any parameter 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 2 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 MAX appear to the right of REC and switch the display to 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 3 10 exit recording mode
23. nits Once the temperature compensation level in conductivity measurement mode has been set and stored the lower portion of the display will show the term tDs Press the W or A button until either the term Cd or tdS appears above it Then press the REC ENTER button to store the setting as the default 15 Set the compensation temperature for the pH electrode when the meter is operating in pH measurement mode without an ATC probe The default value is 77 F 25 C The compensation temperature can be set anywhere between 32 and 212 F 0 and 100 C Once the units of conductivity measurements have been set and stored the lower portion of the display will show the term t Set Press the W or A button repeatedly until the value above t Set matches the desired compensation temperature Press the REC ENTER button to store the setting The display will then either return to the first of the 13 steps in the setup sequence choosing whether or not to format the SD memory card or show the term ESC If ESC appears press either the HOLD ESC button or the LOGGER SET button to exit the setup procedure and enter normal operating mode CALIBRATING A pH ELECTRODE The optional pH electrode you are using must be calibrated before making pH measure ments with it for the first time The electrode also should be calibrated whenever you wish to maximize the accuracy of measurements Calibration is necessary because n
24. on power on the meter and press the W button until the display shows the term Cd Plug the conductivity TDS salt probe into its dedicated socket callout 1 15 of Fig 1 on the top of the meter Following are the default states for the HHWT SD1 in conductivity measurement mode e The display shows Cd e Temperature unit of C e Temperature compensation factor of 2 per C e Autoranging on e Auto power off e Sampling time of 2 seconds To change any of these parameters use the specific procedure for it detailed in the Setup section To exit autoranging mode and manually enter a full scale measurement range press the W button which has the word RANGE stenciled below it repeatedly until the desired range appears The options are 200 uS 2 mS 20 mS and 200 mS If the display shows a reading other than zero before the probe is inserted in the solution to be tested press the A button and hold it for at least 10 seconds until the display reads zero this zeroing function only works in the 200 uS full scale range and only when the original non zero value that appears is less than 2 uS To make the conductivity measurement hold the conductivity probe by its handle and immerse it in the solution under test Gently shake the head of the probe to help any air bubbles escape and to ensure an accurate reading The display will show both the conductivity of the solution in uS or mS and its temperature 5 To measure the TDS content o
25. ot every pH electrode is an ideal electrode that generates 0 mV at pH 7 and 177 4 mV at pH 4 To calibrate a pH electrode perform the following procedure while referring to Figure 2 Fig 2 Calibrating a pH electrode using the buffer solution 2 1 Electrode plug 2 2 Electrode handle 2 3 Electrode head 2 4 pH buffer solution x 1 Insert the plug of a pH electrode into the BNC socket at the top of the meter callout 1 16 of Fig 1 2 Power on the meter by pressing the POWER button 2 2 3 Using Step 15 of the setup procedure manually adjust the compensation temperature so it matches the temperature of the buffer solution Alternatively use an ATC temperature probe to make the adjustment automatically 2 3 i ff 4 Holding the electrode by its handle immerse it in the bottle of buffer solution If you are using the ATC temperature probe il immerse its head in the bottle as well 5 Gently shake the electrode and the probe if used 2 4 The display will show the pH value 6 Use two fingers to press the REC ENTER and HOLD ESC buttons at the same time When this screen appears release the buttons a_i PH CAL 7 Press the W or A button until this screen appears Press the REC ENTER 7 00 button to calibrate the electrode for pH 7 CAL 8 Press the W or A button again until this screen appears Press the REC ENTER button to 4 00 calibrate the electrode for pH 4 CAL 9 Press the W or A button
26. ottom and right side of the HHWT SD1 Familiarize yourself with the positions and functions of these controls indicators and connectors before moving on to the setup procedure Fig 1 The HHWT SD1 s controls and indicators and other physical features 1 1 Liquid crystal display 1 12 Tripod attachment nut 1 2 POWER button 1 13 Socket for ATC temperature probe 1 3 HOLD ESC button 1 14 Socket for oxygen probe 1 4 REC ENTER button 1 15 Socket for conductivity TDS salt probe 1 5 A button 1 16 Socket for pH electrode with 1 6 W button BNC connector 1 7 TIME button 1 17 Socket for 9VDC AC adapter 1 8 LOGGER SET button 1 18 Reset button 1 9 Kickstand 1 19 RS 232 output jack 1 10 Battery compartment cover 1 20 SD card socket 1 11 Battery compartment cover screws SETUP 1 Choose the power source Before using the HHWT SD1 be sure it is powered by fresh batteries or an optional 9VDC AC adapter plugged into the bottom jack on its right side callout 1 15 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 capacity in the socket on the bottom of the meter callout 1 18
27. rrent 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 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 n
28. rs LM Controllers Calibrators Simulators amp Pumps L Industrial pH amp Conductivity Equipment DATA ACQUISITION 4 Data Acquisition amp Engineering Software 4 Communications Based Acquisition Systems Plug in Cards for Apple IBM amp Compatibles 1 Data Logging Systems M Recorders Printers amp Plotters HEATERS M Heating Cable LM Cartridge amp Strip Heaters L Immersion amp Band Heaters Flexible Heaters L Laboratory Heaters ENVIRONMENTAL MONITORING AND CONTROL L Metering amp Control Instrumentation L Refractometers LY Pumps amp Tubing L Air Soil amp Water Monitors Industrial Water amp Wastewater Treatment LM pH Conductivity amp Dissolved Oxygen Instruments M5076 0112
29. sation level Press the REC ENTER button to store the setting 11 Compensate for altitude in metric units when operating in DO measurement mode The default value is 0 meters sea level The level is adjustable from 0 to 8 900 meters Once the salt compensation level has been set and stored the lower portion of the display will show the term High Press the W or A button repeatedly until the value above High reflects your altitude in meters Press the REC ENTER button to store the setting 12 Compensate for altitude in English units when operating in DO measurement mode The default value is 0 ft sea level The level is adjustable from 0 to 29 200 ft Once the altitude compensation level in meters has been set and stored the lower portion of the display will show the term Highf Press the W or A button repeatedly until the value above Hight reflects your altitude in feet Press the REC ENTER button to store the setting 13 Compensate the conductivity TDS salt probe for temperature The default value is 2 per degree C The value is adjustable from 0 to 5 per degree C Once the altitude compensation level in feet has been set and stored the lower portion of the display will show the term PEr C Press the W or A button repeatedly until the value above PEr C matches the desired temperature compensation level Press the REC ENTER button to store the setting 14 Choose conductivity uS or mS or TDS ppm u
30. the term do indicating operation in DO measurement mode Then after making sure that the optional oxygen probe you have obtained is full of fresh electrolyte and has been recently calibrated remove the protective cover from the probe head and plug the probe into its dedicated socket on the top of the meter callout 1 14 of Fig 1 To make the DO content measurement do the following 1 Insert the probe at least 4 in 10cm into the liquid to be measured 2 Wait a few minutes for the instrument to automatically compensate for any difference in temperature between the probe and the liquid 3 Read the DO content of the liquid in mg L on the upper display and its temperature on the lower display 4 Rinse the probe head with tap water after each measurement 5 Replace the probe head protection cover A DO measurement tip Agitating a liquid reduces the effect of measurement errors caused by oxygen diffusing into it from ambient air Ata minimum this can be done by shaking the probe while it is immersed To minimize measurement errors of this type Omega recommends using a magnetic agitator especially in laboratory settings 8 To measure the oxygen content of a volume of air first make sure that the oxygen probe to be used is full of fresh electrolyte and recently calibrated Power on the meter and press the W button until the display shows the term do indicating operation in DO measurement mode Then press the W butto
31. uclear 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 inguiries 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 WARRANTY 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 1 Purchase Order number to cover the the product was PURCHASED COST of the repair 2 Model and serial number of the product 2 Model and serial number of the under warranty and product
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