Related Manuals for LaMotte DO 6 PLUS
Summary of Contents for LaMotte DO 6 PLUS
- Page 1 99 Washington Street Melrose, MA 02176 Phone 781-665-1400 Toll Free 1-800-517-8431 Visit us at www.TestEquipmentDepot.com Code 5-0107-01...
- Page 2 This manual is written to cover as many anticipated applications of the DO 6 PLUS meter as possible. If there are questions about the use of this meter contact the LaMotte Tech Service Department.
-
Page 3: Table Of Contents
TABLE OF CONTENTS INTRODUCTION GETTING STARTED Description of Keypad Functions Description of LCD Annunciators Inserting & removing the Rubber Boot/Stand Inserting New Batteries Battery Replacement Connecting the Probe Electrode Information Switching the Meter On Changing Mode CALIBRATION General Information Temperature Calibration % Saturation Calibration 3.3.1 100% Calibration 3.3.2 0% Calibration... - Page 4 REPLACEMENT PARTS AND ACCESSORIES DISSOLVED OXYGEN THEORY Measurement Units What Is Being Measured? Air Calibration Applications WARRANTY REPAIRS...
-
Page 5: Introduction
It has a large custom LCD (Liquid Crystal Display) for clear and easy reading. The DO 6 PLUS offers measurement of dissolved oxygen (DO) as percentage saturation or concentration. Temperature measurement is available in degrees Celsius. The meter ensures accurate measurement of the dissolved oxygen values through the temperature, barometric pressure and salinity compensation features. -
Page 6: Getting Started
2. GETTING STARTED Description of Keypad Functions The meter has 6 keys on a splash-proof keypad. Some buttons have multiple functions depending on the mode of operation. Powers meter on and off. Meter starts up in the ON/OFF measurement mode that was last used. Enters into calibration mode. -
Page 7: Description Of Lcd Annunciators
Description of LCD Annunciators The 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”... -
Page 8: Inserting New Batteries
Inserting New Batteries The battery compartment is found at the back of the instrument. To open the battery compartment, push the cover in the direction of the arrow and lift up. Note the polarity of batteries before inserting them into position. After the batteries have been replaced, reposition the cover and press down until it locks. -
Page 9: Connecting The Probe
Connecting the Probe 1. To connect the probe, align the connector slots with the posts of the meter socket and rotate the connector clockwise until it locks. 2. To remove the probe, rotate the connector in an anti-clockwise direction until it unlocks, and slide the connector off the socket. 3. -
Page 10: Electrode Information
Electrode Information The DO 6 PLUS includes a galvanic DO electrode which does not require warm-up. It generates a millivolt signal proportional to the amount of oxygen in the solution. The probe has a dual cable; a BNC connector for DO measurement and a phono jack plug for temperature. -
Page 11: Switching The Meter On
Switching the Meter On CAL 13 CAL 24 TAvg Press ON/OFF to power up the meter. The meter will mg/l cycle through various setup parameters. 1. All LCD segments will brief y illuminate. mg/l 2. The model name [DO 6] will display next along with mg/l, ppm, and % annunciators. -
Page 12: Calibration
3. CALIBRATION General Information The DO 6 PLUS 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 the calibration must be performed with consideration of these factors. -
Page 13: Temperature Calibration
Temperature Calibration For the most accurate DO readings, ensure that the temperature is accurate. The temperature sensor of the DO 6 PLUS 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... -
Page 14: Saturation Calibration
% Saturation Calibration The DO 6 PLUS can be easily calibrated in air. For the most accurate DO readings, 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... -
Page 15: 0% Calibration
3.3.2 0% Calibration 1. Rinse the probe thoroughly with DI water or rinse solution. 2. Press MODE to select % saturation. 3. Dip the probe into a zero oxygen solution. Stir gently with the probe. Wait for the reading to stabilize. 4. -
Page 16: Mg/L Or Ppm Calibration
mg/L or ppm Calibration Performing a 100% saturation calibration will simultaneously calibrate the corresponding mg/L (ppm) concentration value. Therefore, an additional mg/L (ppm) calibration isn’t required in most circumstances. If desired, a calibration adjustment in mg/L (ppm) can be performed without affecting the % saturation calibration value. -
Page 17: Measurement
4. MEASUREMENT The DO 6 PLUS 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 18: Taking Measurements
Taking Measurements Follow these general rules when taking measurements: keep the membrane free from contact with solid objects, provide stirring of the solution—this helps to overcome the oxygen consumption of the probe and prevents air bubble entrapment, do not strike the probe against hard surfaces, and do not submerge the cable for extended periods. -
Page 19: Holding A Reading
Holding a Reading To hold the displayed reading momentarily, press HOLD/ENTER during any measurement. The %, mg/L, ppm or T annunciator will blink, indicating that the value is being held. Annunciator Blinks when meter is in “HOLD” mode Press HOLD/ENTER again to deactivate the HOLD function. The meter will revert to the current active measurement and the annunciator will stop blinking. - Page 20 Setup Menu Conf guration 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 21 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...
- Page 22 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...
-
Page 23: Conf Guration Menu (Cof.1)
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. HOLD ENTER 1. From “COF.1” of either setup menu, press HOLD/ENTER to display “A.ATC”. 2. -
Page 24: Calibration Data (Cal.2)
Calibration Data (CAL.2) To view the % saturation or mg/L (ppm) concentration calibration data, proceed from the corresponding setup menu. HOLD ENTER 1. From the setup menu, press to select “CAL.2” for the most recent calibration data. Display will show the latest % saturation calibration if set up menu is selected from the DO % Saturation Mode 2. - Page 25 HOLD ENTER 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” displays for HOLD ENTER 1.5 seconds...
-
Page 26: Automatic Shut Off (Ato.4)
Automatic Shut Off (AtO.4) Use this feature to conserve batteries. When active, the meter will automatically shut off 20 minutes after the last key press. 1. From the setup menu, press select “AtO.4”. 2. Press HOLD/ENTER to enter the menu. HOLD ENTER 3. -
Page 27: Saturation Offset Adjustment (Ofs.6)
The probe of the reference Last offset adjusted meter should be immersed at the same value will be displayed depth as the probe of the DO 6 PLUS. Turn the meter off. 3. With the meter off, keep the MODE HOLD key pressed. - Page 28 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 the concentration setup menu. For the most accurate results, enter the actual salinity value if the samples are at least 0.1 ppt (100 ppm).
-
Page 29: Pressure & Salinity Adjustment
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 “b.SAL”... -
Page 30: Probe Maintenance
6. PROBE MAINTENANCE The DO 6 PLUS probe has 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 allows measurements to be taken immediately—without the typical 15 minute wait of polargraphic dissolved oxygen probes. -
Page 31: Cap And Electrolyte Replacement
Cap and Electrolyte Replacement The pre-assembled cap should be replaced when the probe cannot be calibrated or the membrane is damaged. Typical membrane damages are punctures or wrinkles caused during measurements or cleaning. For replacement parts, see Section 11 – Replacements And Accessories. 1. -
Page 32: Electrolyte Solution
Electrolyte Solution The electrolyte solution in the probe cap will deplete on usage and will need to be replaced periodically. The replacement electrolyte solution included with the probe comes premixed and ready to use. To order more electrolyte solution, see Section 11 – Replacements And Accessories. 7. -
Page 33: Error Messages
8. ERROR MESSAGES LCD Display Indicates Cause Solution Low battery Need new Clean battery batteries contacts. Replace or battery batteries, noting connection is bad. polarity. “Err 1” in % % Saturation Calibration is Check the value Saturation Mode calibration error attempted when of the calibration the factory... -
Page 34: Factory Default Settings
9. FACTORY DEFAULT SETTINGS MENU DESCRIPTION OPTIONS DEFAULT COF.1 Conf guration Setup Menu A.ATC Automatic Temperature Compensation YES / NO 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... -
Page 35: Specifications
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 ± 1.5% of Full Scale Temperature Range -5.0 –... -
Page 36: Replacement Parts And Accessories
Probe: 115 mm x 12 mm (Dia), 3-ft cable Membrane housing: 16 mm (Dia) 11. REPLACEMENT PARTS AND ACCESSORIES Description Code DO 6 PLUS Dissolved Oxygen Meter and Probe 5-0107-01 DO 6 PLUS Probe w/3 ft. cable 5-0129 Replacement Caps (2) with pre-installed membrane and 10 mL 5-0137... -
Page 37: Dissolved Oxygen Theory
12. DISSOLVED OXYGEN THEORY Dissolved Oxygen (DO) refers to the volume of oxygen that is contained in water. There are two main sources of dissolved oxygen 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 38: What Is Being Measured
What Is Being Measured? DO probes respond to the partial pressure of oxygen in liquid or gas being measured. The probes measure the “pressure” of the oxygen rather than the concentration. All of the oxygen entering the probe is consumed at the cathode where it is electrochemically reduced to hydroxyl ions producing an electrical current within the probe: + 2 H... -
Page 39: Applications
13. WARRANTY LaMotte Company warrants this instrument to be free of defects in parts and workmanship for 3 years from the date of shipment and the probe to be free of defects in parts and workmanship for 6 months from the date of shipment. -
Page 40: Repairs
LaMotte Company’s total liability is limited to repair or replacement of the product. The warranty set forth above is inclusive and no other warranty, whether written or oral, is expressed or implied.
Need help?
Do you have a question about the DO 6 PLUS and is the answer not in the manual?
Questions and answers