Hach sension6 Instruction Manual
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Hach sension6 Instruction Manual

Portable dissolved oxygen meter
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  • Page 1 sales@artisantg.com artisantg.com (217) 352-9330 | Visit our website - Click HERE...
  • Page 2 51850-18 Portable Dissolved Oxygen Meter Instruction Manual © Hach Company, 1999, 2000. All rights reserved. Printed in the U.S.A. ap/dk 3/99 1ed ap/dk rev3 3/00...
  • Page 3 TRADEMARKS OF HACH COMPANY...

  • Page 4: Table Of Contents

    TABLE OF CONTENTS CERTIFICATION ........................6 SAFETY PRECAUTIONS ......................9 SPECIFICATIONS........................11 OPERATION .......................... 13 SECTION 1 INTRODUCTION .................... 15 1.1 Unpacking the Instrument ....................16 1.1.1 Standard Accessories ....................16 1.1.2 Optional Accessories ....................16 1.2 Keypad Description ......................16 1.3 Display Fields and Icons ....................
  • Page 5 TABLE OF CONTENTS, continued 3.2 Calibrating the Meter ......................36 3.3 DO Probe ........................... 36 3.3.1 Probe Assembly......................36 3.3.2 Probe Polarization ....................37 3.3.3 Zeroing the Probe ..................... 38 3.3.4 Calibration in Water Saturated Air................39 3.3.5 Calibration to a Known Dissolved Oxygen Concentration ........40 3.3.6 Calibrating a Sample to Read 100% Saturation ............
  • Page 6 TABLE OF CONTENTS, continued SECTION 8 SALINITY/CONDUCTIVITY INFORMATION ......... 67 8.1 Salinity Correction Factors....................67 GENERAL INFORMATION....................77 REPLACEMENT PARTS ......................79 HOW TO ORDER........................81 REPAIR SERVICE........................82 WARRANTY ........................... 83...

  • Page 7: Certification

    CERTIFICATION Hach Company certifies this instrument was tested thoroughly, inspected and found to meet its published specifications when it was shipped from the factory. ™ The sens Portable Dissolved Oxygen Meter has been tested and is certified as indicated to the following...
  • Page 8 CANADIAN INTERFERENCE-CAUSING EQUIPMENT REGULATION, IECS-003: Class “A” emission limits. Supporting test records by Criterion Technology O.A.T.S. (NVLAP #0369), certified compliance by Hach Company. This Class A digital apparatus meets all requirements of the Canadian Interference- Causing Equipment Regulations. Cet appareil numérique de la classe A respecte toutes les exigences du Règlement sur le matériel brouilleur du Canada.
  • Page 9 1. Disconnect the external power supply from the docking station and/or remove one of the sension6 Portable Dissolved Oxygen Meter batteries to verify that meter is or is not the source of the interference.

  • Page 10: Safety Precautions

    SAFETY PRECAUTIONS 2.2.3 Battery Installation...

  • Page 12: Specifications

    Power Requirements: Meter: 4 AA alkaline batteries or via Docking Station Docking Station: 6-12 Vdc; use either Hach-supplied 115 or 230V, 50/60 Hz external power supply or a customer-provided supply with 50 mA output, 5.5-mm power plug with a 2.5 mm center-post opening.
  • Page 13 SPECIFICATIONS, continued Probe Dimensions (Model 50180): Probe Length 150 mm Body Diameter 12 mm 15 mm dia. x 35 mm Cable Length 1, 3, or 15 meters Connector Fisher Enclosure: Water resistant (meets IP67), chemical resistant, dust proof. Instrument will float.

  • Page 14: Operation

    OPERATION DANGER Handling chemical samples, standards, and reagents can be dangerous. Review the necessary Material Safety Data Sheets and become familiar with all safety procedures before handling any chemicals. DANGER La manipulation des échantillons chimiques, étalons et réactifs peut être dangereuse. Lire les Fiches de Données de Sécurité...

  • Page 16: Section 1 Introduction

    SECTION 1 INTRODUCTION The versatile sens ™6 Dissolved Oxygen Meter, shown in Figure 1, easily measures dissolved oxygen in aqueous solutions. The meter may be powered with alkaline batteries or by connecting it to a Docking Station in the laboratory. Important features include measurement in % saturation, autocalibration, a 99-point internal datalogging function, and altitude, barometric pressure, and salinity correction.

  • Page 17: Unpacking The Instrument

    If any items are missing or damaged, contact Hach Customer Service, Loveland, Colorado. Hach’s toll free phone number for customers within the United States is 800-227-4224. Customers outside the United States should contact their regional Hach office or distributor.
  • Page 18 SECTION 1, continued Figure 2 sens 6 Dissolved Oxygen Meter Keypad Table 1 Keys and Description Description Exit/Power On-Off In Reading mode: • Turns the instrument on and off. • Cancels any operation when the question mark is illuminated in the display. In Setup mode: •...

  • Page 19: Display Fields And Icons

    SECTION 1, continued Table 1 Keys and Description (Continued) Description Arrow Keys Scrolls between options in Setup mode. Scrolls through data points in Store and Recall modes. Scrolls between the option to print or erase one data point and the option to print or erase all data points.
  • Page 20 SECTION 1, continued in this model of meter but will be displayed if the power key is held down for several seconds. Figure 3 sens 6 Display Elements Table 2 Main Display Elements Item No. Description Indicates meter is in Calibration mode. When the is flashing, a calibration is necessary.
  • Page 21 SECTION 1, continued Table 2 Main Display Elements (Continued) Item No. Description Flashing ? Indicates calibration is necessary when display shows . Prompts to press the ENTER or EXIT key. Indicates the meter is measuring a sample (sample number is displayed to the right). Indicates the meter is measuring a standard (standard number is displayed to the right).

  • Page 22: Maintenance

    SECTION 1, continued 1.4 Maintenance The meter is designed to be maintenance-free. If the meter gets dirty, wipe the surface with a damp cloth. Use a cotton-tipped applicator to clean or dry the connectors if they get wet. 1.5 Audible Signals The meter will beep under certain conditions: •...

  • Page 24: Section 2 Instrument Setup

    SECTION 2 INSTRUMENT SETUP 2.1 Instrument Description This sens ™6 Dissolved Oxygen Meter is designed for field or laboratory use and operates on four alkaline batteries or 115/230 VAC power. A Docking Station supplies line voltage to the meter in the laboratory. It will not recharge batteries. The meter measures from 0 to 20 mg/L and the sample temperature.

  • Page 25: Docking Station Connections

    SECTION 2, continued Figure 4 Using the sens Docking Station 2.2.2 Docking Station Connections The Docking Station has a power connector, a serial port, and a green indicator light on the back. The standard 9-pin RS232 serial port connector on the Docking Station is used for sending data to a printer or computer.

  • Page 26: Battery Installation

    SECTION 2, continued 2.2.3 Battery Installation CAUTION PRUDENCE Use only alkaline Utiliser seulement des piles alcalines dans cet appareil. Les autres batteries in this product. types de piles peuvent créer des risques pour la sécurité. Other types of batteries ATENCIÓN can result in safety Utilice solamente baterias alcalinas en este producto.

  • Page 27: Printer And Computer Connections

    SECTION 2, continued Figure 5 Installing Batteries in the DO Meter 2.3 Printer and Computer Connections The meter can send data to a computer or printer via the 9-pin serial port (see Figure 6). The printer cable and computer cable are different. The printer cable is a 9-pin to 25-pin cable and the computer cable is a 9-pin to 9-pin cable.

  • Page 28: Turning The Meter On

    SECTION 2, continued Figure 6 Serial Port, 9-pin 2.4 Turning the Meter On After plugging the Docking Station into the wall or installing batteries, turn the instrument on using the key (located on I/O/EXIT the upper left side of the keypad). Press the key once to supply power to the instrument.

  • Page 30: Section 3 Instrument Operation

    SECTION 3 INSTRUMENT OPERATION 3.1 Setup Menu The Dissolved Oxygen Meter allows users to customize the display and ensure accurate results. Access Setup mode by pressing the key located in the lower right hand corner SETUP/CE of the keypad. The SETUP icon and a flashing will appear in the upper right hand corner of the display.

  • Page 31: Selecting Measurement Resolution

    SECTION 3, continued 1. To change the units, access the setup mode by pressing the key. SETUP/CE 2. Press the up arrow once. A will begin flashing in the upper right hand corner of the display. 3. Press the key to select °C or °F and press the READ ENTER key.

  • Page 32: Changing The Barometric Pressure

    SECTION 3, continued 3. To change the salinity factor, press the key. The READ ENTER number pad icon will appear in the lower display. 4. Use the number keys to enter a salinity factor ranging from 0 to 42. Press the key to leave the value unchanged.

  • Page 33: Adjusting The Altitude

    SECTION 3, continued 3. To change the value press the key. The number READ ENTER pad icon will appear in the lower display. 4. Use the number keys to enter the barometric pressure. Press key to leave the value unchanged. Press the EXIT key when the desired barometric pressure has READ ENTER...

  • Page 34: Setting The Time

    SECTION 3, continued 1. Access the setup mode by pressing the key. SETUP/CE 2. Press the up arrow five times. A will begin flashing in the upper right hand corner of the display and the current altitude entry will be displayed. 3.

  • Page 35: Setting The Year

    SECTION 3, continued 2. Press the up arrow seven times. An will begin flashing in the upper right hand corner of the display and the Date icon will appear. The current date entry will be displayed at the bottom of the display. 3.
  • Page 36 SECTION 3, continued Accessing the calibration mode or the setup mode halts automatic data transfer. Also, if the meter has been set to the Lock mode using setup 1, the meter will not send data. When the meter is in Lock mode and the key is pressed, automatic data transfer READ...

  • Page 37: Calibrating The Meter

    SECTION 3, continued 3.2 Calibrating the Meter The sens 6 Dissolved Oxygen meter must be calibrated prior to use. Prior to calibration, the probe must be prepared and stabilized. For measurements below 1 mg/L DO, the probe should be zeroed prior to calibration. See Section 3.3.3 Zeroing the Probe.

  • Page 38: Probe Polarization

    Figure 7 DO Probe Assembly 3.3.2 Probe Polarization Hach dissolved oxygen probes are continuously polarized when they are connected to the instrument. A steady reading will not be seen for 30-50 minutes when the probe electrolyte is new or when the probe has been unplugged for more than one hour.

  • Page 39: Zeroing The Probe

    SECTION 3, continued With the probe in the calibration and storage chamber, observe the mg/L dissolved oxygen concentration after the probe has been polarized for the appropriate period of time. Calibration may be performed when the display is stable for several minutes. 3.3.3 Zeroing the Probe Zeroing the sens 6 Dissolved Oxygen meter is necessary only...

  • Page 40: Calibration In Water Saturated Air

    SECTION 3, continued 9. When the meter cannot complete the zeroing procedure it will begin to beep and show the faulty probe icon. If the meter does not complete the zeroing procedure and exit to the reading mode, add additional sodium sulfite and cobalt standard solution to the stirring water.

  • Page 41: Calibration To A Known Dissolved Oxygen Concentration

    SECTION 3, continued 7. Press the key. The display will show the current READ ENTER value for the altitude. Use the keypad to enter the altitude of the meter. Note: If the true barometric pressure has just been entered, the altitude has to be set to 0 meters (0 feet) or inaccurate calibration may result.
  • Page 42 SECTION 3, continued High concentrations of dissolved substances can be corrected for by entering a sample Salinity value. However, Salinity values may not produce an adjustment equivalent to the value obtained by a Winkler titration because various ions affect the dissolved oxygen concentration differently.

  • Page 43: Calibrating A Sample To Read 100% Saturation

    SECTION 3, continued the concentration of dissolved substances in the sample change. The adjusted salinity value will change the displayed DO concentration in mg/L based on the values of the original calibration. To use this approach: 1. Measure the sample salinity using an Electrolytic Conductivity meter.

  • Page 44: Calibration Review

    SECTION 3, continued 4. Press the key three times to skip to the display READ ENTER showing 100% 5. Press the key. The stabilizing icon will appear READ ENTER while the meter completes the calibration. 6. When the calibration is complete, the meter will return to the read mode.

  • Page 45: Measuring Dissolved Oxygen

    SECTION 3, continued 3.4 Measuring Dissolved Oxygen 3.4.1 General Probe Operation Follow the procedures presented below to obtain maximum performance and accuracy from your sens 6 DO system: • Use the DO probe for aqueous applications only. • Take extra care when handling and storing the oxygen membrane module cap.

  • Page 46: Display Backlight

    SECTION 3, continued 3. Insert the probe into the sample to the desired depth. The probe must be deep enough to cover the thermistor (metallic button) located on the side of the probe. 4. Agitate the probe in the sample to dislodge air bubbles from the sensing area of the probe tip.

  • Page 47: Maintenance

    SECTION 3, continued 3. Remove the membrane cap assembly from the probe. 4. Rinse the anode, cathode, and membrane cap assembly with water. 5. Shake the water out of the membrane cap. 6. Use a clean lab wipe to blot the moisture from the electrode anode and cathode.

  • Page 48: Using The Bod Accessory Kit

    Hach Model 51850 DO probe only. 3.6 Making BOD Determinations Use the Hach BOD Accessory Kit with a magnetic stir plate and a standard 300-mL BOD bottle. 1. Fill a standard 300-mL BOD bottle with the water sample and insert the overflow funnel.

  • Page 50: Section 4 Storing And Recalling Data

    SECTION 4 STORING AND RECALLING DATA 4.1 Storing Measurements The sens 6 meter can store up to 99 measurement readings. Data must be stored to recall it for later review, downloading, or printing. Although the meter display will only show the temperature, data location, and dissolved oxygen value, the following information is stored (and can be downloaded or printed) for each sample:...

  • Page 51: Recalling Stored Data

    SECTION 4, continued arrow keys to scroll to that location number or enter a location using the number keys. Press ENTER 3. If all memory locations are full, the meter will prompt to overwrite one of the data points by displaying Erase Sample Press to replace the data in that location with the...

  • Page 52: Erasing Data

    SECTION 4, continued 4.3 Erasing Data 4.3.1 Erasing Single Data Points 1. To erase data, it must be recalled first. See Section 4.2. 2. When the desired data point is displayed, press ERASE 3. The meter will display (flashing). Press ERASE ENTER to erase the data.

  • Page 54: Section 5 Printing And Data Transfer

    IBM-compatible applications. The Citizen PN60 printer requires a special printer cable that is shipped with the printer when it is ordered from Hach Company. Table 3 Standard 9-pin to 25-pin Printer Cable Serial Printer 25-pin D Connector,...

  • Page 55: Connecting To A Personal Computer

    SECTION 5, continued 1. Connect the RS232 cable to the Docking Station by lining up the holes in the cable connector with the pins of the serial port. 2. Gently and firmly push the cable into the Docking Station. 3. Secure the connection by tightening the screws on either side of the cable connector (see Figure 8).
  • Page 56 SECTION 5, continued cable provides a direct link between the meter and the 9-pin D connector used for the serial port on most personal computers. If your computer has a 25-pin D connector, use a 9-pin to 25-pin adapter (available at most computer supply stores). Table 4 Standard 9-pin to 9-pin Computer Cable 9-pin D Connector Computer 9-pin D Connector, plug...

  • Page 57: Sending Data To Printers/Computers

    Data captured in the spreadsheet format is easily transferred into most spreadsheet programs (i.e., Excel, Microsoft Works, Lotus 123) for graphing and reporting. To install and run Hach Data Capture, the computer and software must meet the following minimum requirements: •...

  • Page 58: Sending Recalled Data Points

    SECTION 5, continued 5.2.2 Sending Recalled Data Points 1. Recall data by following the steps in Section 4.2 on page 50. 2. When the desired sample data is displayed, press PRINT 3. The word and a flashing will be displayed. PRINT 4.

  • Page 60: Section 6 Dissolved Oxygen In Water

    SECTION 6 DISSOLVED OXYGEN IN WATER (0 to 20 mg/L) Assemble the At least one hour Zero the Secure the probe dissolved oxygen probe before measurement, sens ™6 Dissolved cable to the calibration as described in Section polarize the probe by Oxygen meter prior to and storage chamber by 3.3.1 Probe Assembly.
  • Page 61 SECTION 6, continued Prepare the Insert the DO probe Allow at least ten Press the calibration and storage into the calibration and minutes for the located in the lower left chamber by holding it storage chamber. The atmosphere in the corner of the display.
  • Page 62 SECTION 6, continued The main display Press the When the altitude Since this will show the current key. The is correct in combination calibration is performed READ/ENTER value for the barometric display will show the with the barometric in water saturated air, set pressure.
  • Page 63 SECTION 6, continued If sample salinity Insert the probe Agitate the probe Stir the sample has been measured using into the sample. The in the sample to dislodge vigorously with the an Electrolytic probe must be deep air bubbles from the probe or use a stir stand Conductivity Meter, enough to cover the...
  • Page 64 SECTION 6, continued Table 5 Adjusting Barometric Pressure and Altitude Enter a new barometric pressure when the barometric pressure or the altitude of the instrument changes using one of the methods below: Using Sea Level Equivalent Using True Barometric Pressure Obtain the sea level equivalent barometric Obtain the true barometric pressure from a pressure from TV, radio, or a local airport.
  • Page 65 SECTION 6, continued Interferences Oxidizing gases such as chlorine, chlorine dioxide, sulphur trioxide, and bromine can react at the cathode to produce positive interferences. Reducing gases such as hydrogen, hydrogen sulfide, sulfur dioxide, and boranes can react at the anode. After exposure to reducing gases, the user may need to clean the anode and replace the internal filling solution and membrane cap.

  • Page 66: Section 7 Troubleshooting

    SECTION 7 TROUBLESHOOTING 7.1 Error Codes Error codes inform the user of an out-of-range value or meter problem. Table 6 outlines the operator assistance codes available in the meter series. Table 6 Error Code Error Type Possible Remedy Data error in the non-volatile memory. Turn off the meter, then turn it on again.

  • Page 67: Meter Service Request Questionnaire

    SECTION 7, continued 7.2 Meter Service Request Questionnaire 1. What is the complete lot code of the meter and electrode? 2. On what date was the meter purchased? 3. How long has the meter been in use? 4. What types of samples are being tested? 5.

  • Page 68: Section 8 Salinity/Conductivity Information

    SECTION 8 SALINITY/CONDUCTIVITY INFORMATION The following tables have been provided as a reference, but are not required for use with the DO meter. 8.1 Salinity Correction Factors Use the values in Table 7 if the conductivity meter in use does not measure salinity.
  • Page 69 SECTION 8, continued Table 8 is used to estimate the true barometric pressure at certain elevations. The correspondence is based on the assumption that at sea level the barometric pressure is 760 mmHg. After determining the barometric pressure from the table or a local weather service, enter this value into the instrument (see Sections 3.1.5 and 3.1.6).
  • Page 70 SECTION 8, continued Table 9 Solubility of Oxygen in Water Exposed to Water-Saturated Air at Atmospheric Pressure (101.3kPa) Oxygen Solubility mg/L Temp. °C Salinity: 18.0 27.0 36.0 14.62 13.73 12.89 12.11 11.37 14.22 13.36 12.55 11.79 11.08 13.83 13.00 12.22 11.49 10.80 13.46...
  • Page 71 SECTION 8, continued Table 9 Solubility of Oxygen in Water Exposed to Water-Saturated Air at Atmospheric Pressure (101.3kPa) (Continued) Oxygen Solubility mg/L Temp. °C Salinity: 18.0 27.0 36.0 32.0 7.31 6.96 6.63 6.31 6.01 33.0 7.18 6.84 6.52 6.21 5.92 34.0 7.07 6.73...
  • Page 72 SECTION 8, continued Table 10 Solubility of Oxygen in Water vs. Temperature and Barometric Pressure (lower range) (Continued) Pressure mm Hg inches Hg 21.7 22.6 23.6 24.6 25.6 26.6 27.6 Temp. °C Oxygen Solubility mg/L 8.75 9.16 9.56 9.96 10.37 10.77 11.17 8.54...
  • Page 73 SECTION 8, continued Table 10 Solubility of Oxygen in Water vs. Temperature and Barometric Pressure (lower range) (Continued) Pressure mm Hg inches Hg 21.7 22.6 23.6 24.6 25.6 26.6 27.6 Temp. °C Oxygen Solubility mg/L 5.38 5.64 5.90 6.16 6.42 6.68 6.94 5.28...
  • Page 74 SECTION 8, continued Table 11 Solubility of Oxygen in Water vs. Temperature and Barometric Pressure (upper range) (Continued) Pressure mm Hg inches Hg 28.5 29.5 29.9 30.5 31.5 32.5 33.5 Temp °C Oxygen Solubility mg/L 13.56 14.03 14.22 14.50 14.97 15.44 15.91 13.19...
  • Page 75 SECTION 8, continued Table 11 Solubility of Oxygen in Water vs. Temperature and Barometric Pressure (upper range) (Continued) Pressure mm Hg inches Hg 28.5 29.5 29.9 30.5 31.5 32.5 33.5 Temp °C Oxygen Solubility mg/L 8.02 8.30 8.42 8.59 8.87 9.16 9.44 7.87...
  • Page 76 SECTION 8, continued Table 12 Pressure Conversions mbar mm Hg inches Hg 0.75006 0.02953 1 mbar 1.3332 0.039370 1 mm Hg 33.864 25.400 1 inch Hg Example: To convert 1013.25 mbar to mm Hg, multiply 1013.25 by 0.75006. The result is 760 mm Hg. To convert 1013.25 mbar to in.

  • Page 78: General Information

    GENERAL INFORMATION At Hach Company, customer service is an important part of every product we make. With that in mind, we have compiled the following information for your convenience.

  • Page 80: Replacement Parts

    REPLACEMENT PARTS Description unit Cat. No. Barometer, Digital ................each ....27584-00 Batteries, AA..................4/pkg ....19380-04 BOD Accessory Kit Includes funnel and spacer for Dissolved Oxygen Probe ....each ....51971-00 Cable, Dissolved Oxygen Probe, 1 meter ..........each ....51970-00 Cable, Dissolved Oxygen Probe, 3 meter ..........each ....51970-03 Cable, Dissolved Oxygen Probe, 15 meter ..........each ....51970-15 Calibration Storage Chamber, Dissolved Oxygen Probe .....each ....51974-00 Cobalt Standard Solution, 100 mg/L..........100 mL....21503-42...

  • Page 82: How To Order

    Specialists in analytical methods, they are happy to put their talents to work for you. Call 1-800-227-4224 or E-mail techhelp@hach.com. International Customers Hach maintains a worldwide network of dealers and distributors. To locate the representative nearest you, send E-mail to intl@hach. com or call (970) 669-3050.

  • Page 83: Repair Service

    REPAIR SERVICE...

  • Page 84: Warranty

    WARRANTY ™ Hach warrants the sens meters against defective materials or workmanship for three years from the date of shipment.
  • Page 85 Telephone: (970) 669-3050 FAX: (970) 669-2932 FOR TECHNICAL ASSISTANCE, PRICE INFORMATION AND ORDERING: In the U.S.A. - Call toll-free 800-227-4224 Outside the U.S.A. - Contact the HACH office or distributor serving you. On the Worldwide Web - www.hach.com ; E-mail - techhelp@hach.com...

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