Instruction Manual DO 6+ Dissolved Oxygen/Temp 68X243634 Rev 0 Mar 09 Technology Made Easy ...
Instruction Manual DO 6+
Instruction Manual DO 6+ Preface This manual serves to explain the use of the DO 6+ hand held meter. This manual functions in two ways: first as a step by step guide to help you operate the meter; second, as a handy reference guide. This manual is written to cover as many anticipated applications of the DO 6+ meter as possible. If there are doubts in the use of this meter, please do not hesitate to contact the nearest Eutech Instruments Authorized Distributor.
Instruction Manual DO 6+
Instruction Manual DO 6+ Table of Contents 1. INTRODUCTION ...............................................................1 2. GETTING STARTED.........................................................2 2.1 2.2 2.3 2.4 2.5 2.6 2.7 2.8 2.9 Description of Keypad Functions ...................................................................2 Description of LCD Annunciators ...................................................................3 Inserting & removing the rubber armour / stand .......................
Instruction Manual DO 6+ 9. FACTORY DEFAULT SETTINGS ....................................33 10. SPECIFICATIONS ............................................................34 11. REPLACEMENTS AND ACCESSORIES.........................36 12. DISSOLVED OXYGEN THEORY .....................................37 Measurement Units.....................................................................................................38 What Is Being Measured?................................................................
Instruction Manual DO 6+ 1. INTRODUCTION Thank you for purchasing the DO 6+. This microprocessor-based handheld meter is economical and easy to use. It has a large custom LCD (Liquid Crystal Display) for clear and easy reading. The DO 6+ offers measurement of dissolved oxygen (DO) as percentage saturation or concentration. Temperature measurement is also available in degrees Celsius.
Instruction Manual DO 6+ 2. GETTING STARTED 2.1 Description of Keypad Functions Your meter has 6 keys on its splash-proof keypad. Some buttons have multiple functions depending on the mode of operation. ON/OFF Powers meter on and off. Meter starts up in the measurement mode that you last switched off from. CAL Enters into calibration mode. Pressing while in calibration mode will abort calibration without confirming value. MODE Selects desired measurement mode.
Instruction Manual 2.2 DO 6+ Description of LCD Annunciators Your meter has a large custom LCD that consists of 4-digit segments plus annunciators for percentage saturation (%), concentration (mg/L or ppm) and Temperature in degrees Celsius (T). Other annunciators include “A” (when the ATC function is activated), “CAL” (when meter is in calibration mode) and low battery condition.
Instruction Manual 2.3 DO 6+ Inserting & removing the rubber armour / stand 1. To remove meter from rubber armour, push out from the bottom edges of meter until it is completely out of boot. Ensure that your electrode cables are not connected. See Figure 1. 2. To insert meter into armour, slide in from the top of meter before pushing the bottom edges of meter down to set it into position. Lift up the stand at the back of meter for bench top applications if necessary. See Figure 2.
Instruction Manual 2.5 DO 6+ Battery Replacement A low battery annunciator in the LCD alerts you when battery power is running low. Caution: Power off the meter before replacing battery. % Low Battery Condition 2.6 Connecting the Electrode 1) To connect the electrode, align the connector slots with the posts of meter’s socket and rotate connector clockwise until it locks. 2) To remove, rotate the connector in anti-clockwise direction until it unlocks, and slide the connector off the socket.
Instruction Manual 2.7 DO 6+ Electrode Information The DO 6+ includes a galvanic DO electrode (93X233912) which doesn’t require warm-up. It generates a millivolt signal proportional to the amount of oxygen in the solution. The electrode has a dual cable; a BNC connector for DO measurement and a phono jack plug for temperature. The sensor utilizes a cathode, anode, and electrolyte that are separated from the sample by an oxygen permeable membrane.
Instruction Manual 2.8 DO 6+ ON OFF Switching the Meter On CAL 13 CAL 24 Press ON/OFF to power up your meter. Your meter will cycle through various setup parameters when switched on. 1) All LCD segments will briefly illuminate. 2) The model [DO 6+] will display next along with mg/l, ppm, and % annunciators. 3) Next, the meter revision number [r #.##] is shown briefly before beginning measurement.
Instruction Manual DO 6+ 3. CALIBRATION 3.1 General Information The DO 6+ has three measurement modes; DO as % saturation, DO as mg/L (or ppm) concentration, and temperature. Dissolved oxygen levels vary with temperature, barometric pressure, and salinity, so calibration must be performed with consideration of these factors. It is necessary to set the proper temperature, barometric pressure and salinity values prior to performing any DO calibration or measurement. See Section 3.
Instruction Manual DO 6+ The DO 6+ will accept one calibration point in concentration mode. The minimum value is 2 mg/L (ppm), and the calibration window is +/- 40% of the factory default value. Temperature and % saturation calibration should take place before attempting to perform mg/L (ppm) concentration calibration. Calibration of the concentration mode will only replace the previous concentration calibration and does not affect the % saturation calibration.
Instruction Manual 3.2 DO 6+ TA Temperature Calibration For best DO accuracy, ensure that the temperature is accurate. The temperature sensor of the DO 6+ probe has been factory calibrated, however if it changes over time or if the probe is replaced, calibration may be necessary. To protect from erroneous calibrations, the allowable tolerance is limited to ±5°C adjustment of the factory default value. Most users utilize automatic temperature compensation using the sensor that is built into the probe.
Instruction Manual 3.3 DO 6+ % Saturation Calibration The DO6+ can be easily calibrated in air. For best DO accuracy, ensure that the barometric pressure value is accurate. The barometric pressure factory default is 760 mm Hg, which results in a theoretical calibration value of 100% saturation in air. If the barometric pressure setting has been changed from 760 mm Hg, the meter will automatically adjust to a new % saturation calibration value instead of 100%.
Instruction Manual 3.3.2 DO 6+ 0% Calibration 1) Rinse the probe well with DI water or rinse solution. 2) Press MODE to select % saturation. 3) Dip the probe into zero oxygen solution. Wait for the reading to stabilize. 4) 5) A % CAL CAL Press CAL. The CAL indicator and intended percentage calibration point (0%) display briefly, before CAL flashes. The % value based on the factory default calibration is shown. Press HOLD/ENTER to confirm the calibration.
Instruction Manual 3.4 DO 6+ mg/L or ppm Calibration A mg/l Performing a 100% saturation calibration will simultaneously calibrate the corresponding mg/L (ppm) concentration value. Therefore, additional mg/L (ppm) calibration isn’t required in most circumstances. If desired, you can perform a calibration adjustment in mg/L (ppm) without affecting your % saturation calibration value. 1) Perform 100% saturation calibration. See Section 3.3.1 — 100% Calibration.
Instruction Manual DO 6+ 4. MEASUREMENT The DO 6+ offers automatic or manual temperature See Section 5.2 — Automatic Temperature Compensation. compensation. A Automatic Temperature Compensation activated % 4.1 Temperature Compensation Insert the phono plug of the probe for Automatic Temperature Compensation (ATC). The “A” annunciator will display normally when active, or blink if the phono plug is disconnected. T Deactivate “A.ATC” for manual temperature compensation.
Instruction Manual 4.2 DO 6+ Taking Measurements Follow these general rules when taking measurements: keep the membrane free from contact with solid objects, provide stirring of your solution⎯this helps to overcome the oxygen consumption of the probe and prevents air bubble entrapment, do not strike against hard surfaces, and do not submerge the cable for extended periods. 1) Rinse the probe well with DI water or rinse solution. 2) Select the appropriate measurement mode.
Instruction Manual 4.3 DO 6+ Pressure & Salinity Compensated Measurements During measurement the dissolved oxygen reading is automatically compensated for salinity and pressure based on values entered in the setup menu. For best DO accuracy, ensure pressure and salinity are adjusted accordingly from the setup menu. The factory default values are 760 mm Hg (101.3 kPa) barometric pressure (sea level) and 0.0 ppt salinity (no salinity). See Section 5.9 — Pressure & Salinity Adjustment. 4.
Instruction Manual DO 6+ 5. SETUP There are two setup menus. One menu is derived from the % saturation and temperature modes, the other menu is derived from the mg/L (or ppm) concentration mode. 1) Press MODE to display % or temperature. Press ON/OFF to power off. OR Press MODE to display mg/L (or ppm). Press ON/OFF to power off. 2) With the meter off, keep the MODE key pressed. Press and release ON/OFF, then release MODE. The meter should display “SEt.P” after ON/OFF is released and “COF.
Instruction Manual DO 6+ Setup Menu Configuration Menu A.ATC Automatic Temperature Compensation b.DO Select mg/L or ppm units for concentration mode (available from concentration setup only) View the latest calibration data according to the respective setup menu. View the electrode properties FACT View the slope factor OFS View the % saturation offset adjustment. (available from % saturation concentration setup only) HI.mV View the mV value at 100% saturation LO.
Instruction Manual MODE ON OFF DO 6+ Switch off from % Saturation or Temperature measurement mode. Press and hold MODE key and then switch on. SEt.
Instruction Manual MODE ON OFF DO 6+ Switch off from Concentration measurement mode. Press and hold MODE key and then switch on. SEt.
Instruction Manual DO 6+ 5.1 Configuration Menu (COF.1) 5.2 Automatic Temperature Compensation (A.ATC) Use this menu to change automatic temperature compensation (A) or units of concentration (mg/L or ppm). ATC is recommended for most applications. 1) From “COF.1” of either setup menu, press HOLD/ENTER to display “A.ATC”. 2) Press HOLD/ENTER to enter the selection menu. 3) Use ▲▼ to select YES (activate ATC) or NO (deactivate ATC and activate manual temperature compensation).
Instruction Manual 5.3 1) DO 6+ Selection of mg/L or ppm (b.DO) From “COF.1” of the mg/L (ppm) setup menu, press HOLD/ENTER three times to display “b.DO”. 2) Use ▲▼ to select the desired units of measurement. 3) Press HOLD/ENTER to confirm. 4) Press CAL to return to measurement mode. 5.4 mg/l ppm Calibration Data (CAL.2) To view the % saturation or mg/L (ppm) concentration calibration data, proceed from the corresponding setup menu. 1) From the setup menu, press ▲▼ to select “CAL.
Instruction Manual 5.5 DO 6+ Electrode Data (ELE.3) Use this menu to view electrode data for diagnostic purposes. Data includes; slope factor (FACT), % saturation offset (OFS), 100% saturation mV value (HI.mV), and 0% saturation mV value (LO.mV). To view electrode data for % saturation or mg/L (ppm) modes, enter from the corresponding setup menu. The electrode slope factor gives an indication of the probe’s efficiency. It is the ratio of the actual mV produced by the probe to the theoretical mV value.
Instruction Manual DO 6+ HOLD ENT ER “FACT” displays for 1.5 seconds Viewing of the offset percentage adjustment will be available only if set up menu is selected from the DO % Saturation or the Temperature Mode. Otherwise, this menu will be skipped. “OFS” displays for 1.5 seconds HOLD ENT ER % “HI.mV” displays for 1.5 seconds HOLD ENT ER HOLD ENT ER “LO.mV” displays for 1.5 seconds 5.6 Automatic Shut Off (AtO.4) Use this feature to conserve batteries.
Instruction Manual 5.7 DO 6+ Reset to Factory Default (rSt.5) Use this mode to reset the meter to factory default settings. There are two levels of reset. Calibration (A.CAL) resets calibration values only. User (b.USR) resets all data, calibration, and other customized setup functions. 1) From the setup menu, press ▲▼ to select “rSt.5”. 2) Press HOLD/ENTER to enter the menu. 3) Press HOLD/ENTER to enter calibration reset “A.CAL”.
Instruction Manual 5.8 DO 6+ % Saturation Offset Adjustment (OFS.6) Use this feature to offset the meter’s value when cross referenced to another DO meter. The DO 6+ allows +/- 10.0% offset adjustment. View the offset value from the Electrode Data menu “ELE.3”. 1) 2) HOLD ENTER Using the % saturation mode of your DO6+, observe the reading a sample solution after it has stabilized.
Instruction Manual 5.9 DO 6+ Pressure & Salinity Adjustment Use this menu to set barometric pressure and salinity values of the sample to be measured. Use mmHg (A.HG) or kilopascal (A.PA) barometric pressure units, and ppt salinity units (bSAL) from concentration setup menu. For best accuracy, enter the actual salinity value if your samples are at least 0.1 ppt (100 ppm). Maximum adjustment is 50 ppt (50,000 ppm or 5% salt). 1) Press MODE to display mg/L concentration. Press ON/OFF to power off.
Instruction Manual DO 6+ HOLD ENTER HOLD ENTER HOLD ENTER HOLD ENTER HOLD ENTER HOLD ENTER “CO” will display for 1.5 seconds Display will continue to Salinity setting menu “b.SAL” if Set Up menu is entered from mg/l (ppm) mode. Otherwise display will return back to “DPr.7” HOLD ENTER “CO” will display for 1.5 seconds Display will continue to “CO” will display for Salinity setting menu 1.5 seconds “b.SAL” if Set Up menu is entered from mg/l (ppm) Display will return back to “DPr.7” mode.
Instruction Manual DO 6+ 6. PROBE MAINTENANCE The DO 6+ probe is a galvanic measuring element which produces an output proportional to the oxygen present in the medium in which it is placed. The galvanic probe design lets you take measurements immediately – without the typical 15 minute wait of polargraphic dissolved oxygen probes. The probe consists of two parts. The upper part consists of the anode, cathode, and dual cable. The lower part consists of a pre-assembled cap, and electrolyte solution.
Instruction Manual 6.1 DO 6+ Cap and Electrolyte Replacement Replacement of the pre-assembled cap is required only when you cannot calibrate the probe, or if the membrane is damaged. Typical membrane damages are punctures or wrinkles caused during measurements or cleaning. For part numbers, see Section 11 – REPLACEMENTS AND ACCESSORIES. 1) Unscrew the cap counter clockwise from the probe sensing tip. 2) Rinse the probe under running water. 3) Mount the nozzle tip onto the syringe provided.
Instruction Manual 6.2 DO 6+ Electrolyte Solution The electrolyte solution in your probe’s cap will deplete on usage and will need to be replaced periodically. The replacement electrolyte solution included with your probe comes premixed and ready to use. To order more electrolyte solution, Section 11 – REPLACEMENTS AND ACCESSORIES. 7.
Instruction Manual DO 6+ 8. ERROR MESSAGES LCD Display Indicates Cause Solution Low battery Need new batteries or battery connection is bad. Clean battery contacts. Replace batteries, noting polarity. “Err 1” in % Saturation Mode % Saturation calibration error Calibration is attempted when the factory calibrated absolute value is within 10.1% to 49.9% Check the value of the calibration solution. If zero calibration is done, make sure the limit of 10% is not exceeded Recondition your probe “Err.
Instruction Manual DO 6+ 9. FACTORY DEFAULT SETTINGS MENU DESCRIPTION COF.1 Configuration Setup Menu A.ATC Automatic Temperature Compensation OPTIONS DEFAULT YES / NO YES b.DO DO Concentration Units mg/L or ppm mg/L CAL.2 Calibration Data View only ____ ELE.3 Electrode Data Menu FACT Electrode Slope Factor View only 1.000 OFS Viewing the % Saturation offset adjustment. View only 0.0% HI.mV View mV Value at 100% Saturation View only 50 mV LO.
Instruction Manual DO 6+ 10. SPECIFICATIONS % Saturation Mode Range Resolution Relative accuracy 0.00 – 200.0 % 0.1 % ± 1.5% of Full Scale mg/L (ppm) Concentration Mode Range Resolution Relative accuracy 0.00 – 20.00 mg/L or ppm 0.01 mg/L; 0.01 ppm ± 1.5% of Full Scale Temperature Range Resolution Relative accuracy -5.0 – 105.0 °C (meter only)* 0.1 °C ± 0.5 °C *Probe measures 0.0 – 50.0 °C Salinity Correction Range Resolution Method 0.0 – 50.0 ppt 0.
Instruction Manual DO 6+ % Saturation Calibration Limits Factory calibrated absolute value of 10.0% and below for 0% point & 50% to 200% for 100% point. Concentration Calibration Window +/- 40% from the factory default measurement value. Minimum reading allowed is 2.00 mg/L (ppm). Temperature Calibration Window +/- 5°C from factory default measurement Offset Adjustments (% Saturation) +/- 10.0 of reading in Saturation mode HOLD function Yes Auto-Off function Selectable Auto Off function.
Instruction Manual DO 6+ 11.
Instruction Manual DO 6+ 12. DISSOLVED OXYGEN THEORY Dissolved Oxygen (DO) refers to the volume of oxygen that is contained in water. There are two main sources of DO in water; atmosphere and photosynthesis. Waves and tumbling water mix air into the water where oxygen readily dissolves until saturation occurs. Oxygen is also produced by aquatic plants and algae during photosynthesis.
Instruction Manual DO 6+ Measurement Units One measure of DO in water is parts per million (ppm) which is the number of oxygen molecules (O2) per million total molecules in a sample. Calculating the % Saturation is another way to analyze DO levels. % Saturation is the measured DO level divided by the greatest amount of oxygen that the water could hold under various temperature and atmospheric pressure conditions multiplied by 100.
Instruction Manual DO 6+ Air Calibration Understanding the principle of air calibration is easy, once you know that it is partial pressure that the probe is responding to. When the probe is in air, it is measuring the partial pressure of oxygen in air. If water is air saturated, then the partial pressure of oxygen in the water will be the same as it is in air. Therefore, all you need to know is the temperature of the air in which the probe is placed.
Instruction Manual DO 6+ 1- 1+ introduced chemical compounds such as nitrate (NO3 ) and ammonia (NH4 ), 22+ + sulfate (SO4 ), and sulfite (SO3 ) and ferrous (Fe2 ) and ferric (Fe3 ) ions. These are important consideration for water and wastewater treatment industry. 13. WARRANTY This meter is supplied with a three-year warranty, six-month warranty for electrode against significant deviations in material and workmanship.
For more information on Eutech Instruments products, contact your nearest distributor or visit our website listed below: Eutech Instruments Pte Ltd. Blk 55, Ayer Rajah Crescent, #04-16/24 Singapore 139949 Tel: (65) 6778 6876 Fax: (65) 6773 0836 E-mail: eutech@thermofisher.com Web-site: www.eutechinst.
