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Summary of Contents for EUTECH INSTRUMENTS DO 700
- Page 1 Instruction Manual DO 700 Dissolved Oxygen/ºC/ºF Bench Meter Technology Made Easy ... Part of Thermo Fisher Scientific 68X541703 Rev. 2. Sep 2010...
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Page 3: Table Of Contents
TABLE OF CONTENTS 1. INTRODUCTION .............. 1 2. GETTING STARTED............2 Keypad Functions ..............2 LCD Annunciators ..............3 Meter Connections ..............3 3. DISSOLVED OXYGEN / ATC ELECTRODE....4 4. CALIBRATION ..............5 Temperature Calibration ............6 % Saturation Calibration ............7 100% Calibration.............. - Page 4 9. REPLACEMENTS AND ACCESSORIES......22 10. TROUBLESHOOTING GUIDE......... 23 11. SPECIFICATIONS............25 12. WARRANTY..............26 13. RETURN OF ITEMS............27...
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Page 5: Introduction
INTRODUCTION Thank you for purchasing our DO 700 series benchtop meter. This microprocessor-based meter is economical and simple to use. The design incorporates a large LCD for clear viewing, yet offers a small footprint to conserve space. The DO 700 measures Dissolved Oxygen in % saturation or concentration (mg/L or ppm) with temperature (ºC or ºF). -
Page 6: Getting Started
GETTING STARTED 2.1 Keypad Functions Powers the meter on and off. Upon power on, the meter automatically begins in the mode that was last used. Calibration and memory values are retained even if meter is unplugged. Toggle between available measurement modes—% saturation or concentration (mg/L or ppm). -
Page 7: Lcd Annunciators
2.2 LCD Annunciators 2.3 Meter Connections Power supply Temperature connection of Dissolved Oxygen electrode BNC connection of Dissolved Oxygen electrode... -
Page 8: Dissolved Oxygen / Atc Electrode
DISSOLVED OXYGEN / ATC ELECTRODE The DO 700 includes a galvanic DO electrode with built in temperature measurement. The electrode has a dual cable; a BNC connector for DO measurement and a mini- phono plug for temperature. The electrode is... -
Page 9: Calibration
CALIBRATION The DO 700 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 10: Temperature Calibration
The DO 700 will default to 25 ºC / 77 ºF when the ATC plug is not connected. 1) Place the probe into a solution with a known accurate temperature such as a constant temperature bath. -
Page 11: Saturation Calibration
4.2 % Saturation Calibration The DO700 can be easily calibrated in air. For best accuracy, ensure that the barometric pressure value is accurate. The barometric pressure factory default is 760 mm Hg (1.013 bar), 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%. -
Page 12: Mg/L Or Ppm (Concentration) Calibration
Press . The CAL indicator will blink and the secondary display will indicate the calibration point, 0.0. Press to confirm the calibration. The primary display will blink briefly before calibrating to 0.0%. Press to return to measurement mode, or continue with 100% calibration if desired (note 0% calibration followed by 100% calibration is not recommended---always perform 100% calibration first). -
Page 13: Setup Functions
Press to confirm the calibration. The primary display will blink briefly before returning to measurement mode. NOTE: The minimum calibration value is 2 mg/L. In addition, the calibration is limited to ±40% adjustment of the factory default value to prevent erroneous calibrations. SETUP FUNCTIONS Use the setup feature to customize your instrument operation. -
Page 14: Ele (Electrode Information)
5.2 2.0 ELE (Electrode Information) Press to view calibration factor (CAL.F) TIP: The factor is an indication of the probe’s efficiency. It is the ratio of the actual mV produced by the probe to the theoretical mV value. The ratio displays from 0.5 to 1.999. Press to view mV output for 100% (HI). -
Page 15: Dpr (Barometric Pressure Adjustment)
The DO 700 allows +/- 10.0% offset adjustment. Note that subsequent user calibrations will reset the offset adjustment back to the factory default value of 0.0 %. -
Page 16: Unit (Unit Adjustment) From Concentration Mode
Press to confirm. 5.9 3.5 Unit (Unit Adjustment) from concentration mode Press Press to select ppm or mg/L units. Press to confirm. 5.10 4.0 rSt (Reset) Press Press to select “Yes” (Reset) or “No” (Cancel). If “Yes”, press to select “Cal” (calibration reset only) or “FCt”... -
Page 17: Taking Measurements
TAKING MEASUREMENTS During measurement the dissolved oxygen reading is automatically compensated for pressure and salinity. For best accuracy, ensure the pressure and salinity settings are adjusted accordingly from the setup menu. The factory default value for barometric pressure is 760 mm Hg or 101.3 bar (sea level). The factory default value for salinity is 0.0 ppt (no salinity). -
Page 18: Hold Function
6.2 Storing and Recalling Data The DO 700 can retain up to 100 data points into memory for later retrieval. 1) In the measurement mode, press to insert the measured value into memory. -
Page 19: Electrode Maintenance
ELECTRODE MAINTENANCE The DO 700 electrode produces an output proportional to the oxygen present in the medium in which it is placed. The galvanic probe design allows for immediate use—unlike the typical 15 minute warm-up period required for polargraphic electrodes. - Page 20 There are no special probe storage requirements. 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.
- Page 21 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, see Section 9 –...
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Page 22: Dissolved Oxygen Theory
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. - Page 23 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. The “mg/L” unit is equivalent to ppm (a liter of water weighs 1 million milligrams—one part in a million is similar to one milligram in a liter).
- Page 24 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 25 Some pollutants such as acid mine drainage produce direct chemical demands on oxygen in the water. DO is consumed in the oxidation- reduction reactions of introduced chemical compounds such as nitrate ) and ammonia (NH ), sulfate (SO ), and sulfite (SO ) and ferrous (Fe ) and ferric (Fe...
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Page 26: Replacements And Accessories
REPLACEMENTS AND ACCESSORIES Part number Ordering Code Item Description Eutech Oakton Instruments Instruments DO 700 meter with DO/ATC probe and 1-m cable, (2) Pre-assembled caps, ECDO70042S 35415-00 electrolyte, integral stand, & 100/240 01X543501 VAC adapter. DO/ATC probe, 1-m cable, (2) Pre- DO6HANDY assembled caps, electrolyte, &... -
Page 27: Troubleshooting Guide
TROUBLESHOOTING GUIDE PROBLEM CAUSE SOLUTION No display Main power not switched Switch on the power supply. on. AC Adapter socket not Re-insert AC Adapter. inserted properly. “Ur” (Under DO or Temperature value Confirm measurement condition, range) is out of range. ensure temp is within range. - Page 28 PROBLEM CAUSE SOLUTION % calibration value is not Check electrode connections. acceptable. Check that correct DO unit is Electrode is disconnected selected & repeat cal procedure. or failing. Service electrode. Reset meter. Replace electrode. ppm or mg/L calibration is Use concentration calibration attempted when the factory solution higher than 2.00.
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Page 29: Specifications
SPECIFICATIONS DO % Saturation Range 0 to 300% Resolution 0.1 % Relative accuracy ± 0.5% of value Offset adjustment ± 10.0% of reading Calibration Points (2 points) 100% in saturated air or air-saturated water, 0% in zero oxygen solution DO mg/L or ppm Range 0.0 to 30.0 Resolution... -
Page 30: Warranty
If repair or adjustment is necessary and has not been the result of abuse or misuse within the designated period, please return – freight prepaid – and correction will be made without charge. Eutech Instruments/Oakton Instruments will determine if the product problem is due to deviations or customer misuse. -
Page 31: Return Of Items
For your protection, items must be carefully packed to prevent damage in shipment and insured against possible damage or loss. Eutech Instruments will not be responsible for damage resulting from careless or insufficient packing. A restocking charge will be made on all unauthorized returns. - Page 35 NOTES...
- Page 36 For more information on our products, please contact our channel partner or visit our websites listed below: Oakton Instruments Eutech Instruments Pte Ltd 625 E Bunker Court Blk 55, Ayer Rajah Crescent, Vernon Hills, IL 60061 #04-16/24 Singapore 139949 Tel: (1) 888-462-5866...
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