EUTECH INSTRUMENTS DO 6 PLUS Instruction Manual
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EUTECH INSTRUMENTS DO 6 PLUS Instruction Manual

Dissolved oxygen/temp hand held meter
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Instruction Manual
DO 6+ Dissolved Oxygen/Temp
68X243634
Rev 0 Mar 09
Technology Made Easy ...
Part of Thermo Fisher Scientific

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  • Page 1 Instruction Manual DO 6+ Dissolved Oxygen/Temp 68X243634 Rev 0 Mar 09 Technology Made Easy ... Part of Thermo Fisher Scientific...
  • Page 2 Instruction Manual DO 6+...
  • Page 3 If there are doubts in the use of this meter, please do not hesitate to contact the nearest Eutech Instruments Authorized Distributor. Eutech Instruments will not accept any responsibility for damage or malfunction to the meter caused by improper use of the instrument.
  • Page 4 Instruction Manual DO 6+...

  • Page 5: Table Of Contents

    Instruction Manual DO 6+ Table of Contents 1. INTRODUCTION ...............1 2. GETTING STARTED............2 Description of Keypad Functions ..............2 Description of LCD Annunciators ..............3 Inserting & removing the rubber armour / stand ..........4 Inserting New Batteries.................4 Battery Replacement ..................5 Connecting the Electrode................5 Electrode Information..................6 Switching the Meter On .................7 Changing Mode .....................7...
  • Page 6 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?...................38 Air Calibration ......................39 Applications ........................39 13. WARRANTY..............40 14. RETURN OF ITEMS............40...

  • Page 7: Introduction

    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.

  • Page 8: Getting Started

    Instruction Manual DO 6+ 2. GETTING STARTED 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.

  • Page 9: Description Of Lcd Annunciators

    Instruction Manual 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.

  • Page 10: Inserting & Removing The Rubber Armour / Stand

    Instruction Manual 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.

  • Page 11: Battery Replacement

    Instruction Manual 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 Connecting the Electrode To connect the electrode, align the connector slots with the posts of meter’s socket and rotate connector clockwise until it locks.

  • Page 12: Electrode Information

    Instruction Manual 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.

  • Page 13: Switching The Meter On

    Instruction Manual DO 6+ Switching the Meter On CAL 13 CAL 24 TAvg mg/l Press ON/OFF to power up your meter. Your meter will cycle through various setup parameters when switched on. All LCD segments will briefly illuminate. mg/l The model [DO 6+] will display next along with mg/l, ppm, and % annunciators.

  • Page 14: Calibration

    Instruction Manual DO 6+ 3. CALIBRATION 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.
  • Page 15 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.

  • Page 16: Temperature Calibration

    Instruction Manual DO 6+ 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.

  • Page 17: Saturation Calibration

    Instruction Manual 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.

  • Page 18: 0% Calibration

    Instruction Manual DO 6+ 3.3.2 0% Calibration Rinse the probe well with DI water or rinse solution. Press MODE to select % saturation. Dip the probe into zero oxygen solution. Wait for the reading to stabilize. Press CAL. The CAL indicator and intended percentage calibration point (0%) display briefly, before CAL flashes.

  • Page 19: Mg/L Or Ppm Calibration

    Instruction Manual DO 6+ mg/L or ppm Calibration 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 mg/l adjustment in mg/L (ppm) without affecting your % saturation calibration value.

  • Page 20: Measurement

    Instruction Manual DO 6+ 4. MEASUREMENT The DO 6+ offers automatic or manual temperature compensation. See Section 5.2 — Automatic Temperature Compensation. Automatic Temperature Compensation activated 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.

  • Page 21: Taking Measurements

    Instruction Manual 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.

  • Page 22: Pressure & Salinity Compensated Measurements

    Instruction Manual DO 6+ Pressure & Salinity Compensated Measurements During measurement dissolved oxygen reading 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).

  • Page 23: Setup

    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. Press MODE to display % or temperature. Press ON/OFF to power off. Press MODE to display mg/L (or ppm).
  • Page 24 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.
  • Page 25 Instruction Manual DO 6+ MODE Switch off from % Saturation or Temperature measurement mode. Press and hold MODE key and then switch on. SEt.P will display for 1 second % or Temperature Setup Menu - 19 -...
  • Page 26 Instruction Manual DO 6+ MODE Switch off from Concentration measurement mode. Press and hold MODE key and then switch on. SEt.P will display for 1 second mg/L (ppm) Concentration Setup Menu - 20 -...

  • Page 27: Configuration Menu (Cof.1)

    Instruction Manual DO 6+ Configuration Menu (COF.1) 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. From “COF.1” of either setup menu, press HOLD/ENTER to display “A.ATC”.

  • Page 28: Selection Of Mg/L Or Ppm (B.do)

    Instruction Manual 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 mg/l display “b.DO”. Use ▲▼ to select the desired units of measurement. Press HOLD/ENTER to confirm. Press CAL to return to measurement mode. Calibration Data (CAL.2) To view the % saturation or mg/L (ppm) concentration calibration data, proceed from the corresponding setup menu.

  • Page 29: Electrode Data (Ele.3)

    Instruction Manual 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.

  • Page 30: Automatic Shut Off (Ato.4)

    Instruction Manual DO 6+ HOLD ENT ER 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 “FACT” displays for will be skipped. 1.5 seconds “OFS”...

  • Page 31: Reset To Factory Default (Rst.5)

    Instruction Manual 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. From the setup menu, press ▲▼...

  • Page 32: Saturation Offset Adjustment (Ofs.6)

    Instruction Manual 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 HOLD Electrode Data menu “ELE.3”. ENTER Using the % saturation mode of your DO6+, observe the reading a sample...

  • Page 33: Pressure & Salinity Adjustment

    Instruction Manual 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).
  • Page 34 Instruction Manual DO 6+ HOLD ENTER HOLD ENTER HOLD HOLD ENTER ENTER HOLD HOLD HOLD ENTER ENTER ENTER “CO” will display “CO” will display for 1.5 seconds for 1.5 seconds Display will continue to Display will continue to “CO” will display for Salinity setting menu Salinity setting menu 1.5 seconds...

  • Page 35: Probe Maintenance

    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.

  • Page 36: Cap And Electrolyte Replacement

    Instruction Manual 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 –...

  • Page 37: Electrolyte Solution

    Instruction Manual 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 –...

  • Page 38: Error Messages

    Instruction Manual DO 6+ 8. ERROR MESSAGES LCD Display Indicates Cause Solution Low battery Need new batteries or Clean battery contacts. battery connection is Replace batteries, bad. noting polarity. “Err 1” in % % Saturation Calibration is attempted Check the value of the Saturation calibration when the factory...

  • Page 39: Factory Default Settings

    Instruction Manual DO 6+ 9. FACTORY DEFAULT SETTINGS MENU DESCRIPTION OPTIONS DEFAULT COF.1 Configuration Setup Menu A.ATC Automatic Temperature Compensation YES / NO b.DO DO Concentration Units mg/L or ppm mg/L _ _ _ _ View only CAL.2 Calibration Data ELE.3 Electrode Data Menu FACT...

  • Page 40: Specifications

    Instruction Manual DO 6+ 10. SPECIFICATIONS % Saturation Mode Range 0.00 – 200.0 % Resolution 0.1 % Relative accuracy ± 1.5% of Full Scale mg/L (ppm) Concentration Mode Range 0.00 – 20.00 mg/L or ppm Resolution 0.01 mg/L; 0.01 ppm Relative accuracy ±...
  • Page 41 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)

  • Page 42: Replacements And Accessories

    Instruction Manual DO 6+ 11. REPLACEMENTS AND ACCESSORIES Order Code Description Part Number ECDO600PLUSK DO 6+ Dissolved Oxygen Meter in Hard Plastic Carry Case 01X370112 DO 6+ Dissolved Oxygen Meter with 3 m Cable Electrode, (2) ECDO602PLUSK Assembled Membrane Cap Housing, Refilling Electrolyte (10- 01X370113 mL) &...

  • Page 43: Dissolved Oxygen Theory

    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.

  • Page 44: Measurement Units

    Instruction Manual DO 6+ Measurement Units One measure of DO in water is parts per million (ppm) which is the number of oxygen molecules (O ) 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...

  • Page 45: Air Calibration

    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.

  • Page 46: Warranty

    If repair or adjustment is necessary and has not been the result of abuse or misuse within the designated period, please return – freight pre-paid – and correction will be made without charge. Eutech Instruments will determine if the product problem is due to deviations or customer misuse.
  • Page 48 For more information on Eutech Instruments products, contact your nearest distributor or visit our website listed below: Eutech Instruments Pte Ltd. Distributed by: Blk 55, Ayer Rajah Crescent, #04-16/24 Singapore 139949 Tel: (65) 6778 6876 Fax: (65) 6773 0836 E-mail: eutech@thermofisher.com...

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