Hanna Instruments HI 9146 Instruction Manual
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Hanna Instruments HI 9146 Instruction Manual

Dissolved oxygen and temperature meter
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Instruction Manual
HI 9146
Dissolved Oxygen
and
Temperature Meter
w w w. h a n n a i n s t . c o m
1

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Summary of Contents for Hanna Instruments HI 9146

  • Page 1 Instruction Manual HI 9146 Dissolved Oxygen Temperature Meter w w w. h a n n a i n s t . c o m...

  • Page 2: Table Of Contents

    W A R R A N T Y W A R R A N T Y HI 9146 is guaranteed for two years against defects in workmanship and materials when used for its intended purpose and maintained according to instructions. Electrodes and probes are guaranteed for six months. This warranty is limited to repair or replacement free of charge.

  • Page 3: Preliminary Examination

    GENERAL DESCRIPTION GENERAL DESCRIPTION GENERAL DESCRIPTION HI 9146 is state-of-the-art, heavy-duty DO meter, designed to provide laboratory results and accuracy under harsh industrial conditions. This instrument is provided with a series of new diagnostic features and messages on the LCD which add an entirely new dimension to the measurement of DO, by allowing the user to dramatically improve the reliability of the measurement.

  • Page 4: Probe Functional Description

    PROBE FUNCTIONAL DESCRIPTION PROBE FUNCTIONAL DESCRIPTION PROBE FUNCTIONAL DESCRIPTION PROBE FUNCTIONAL DESCRIPTION PROBE FUNCTIONAL DESCRIPTION 1. D.O. Probe 2. Protective Cap 3. Watertight Shielded Cable 4. Polypropylene Probe Body 5. Temperature Sensor 6. O-Ring Seal 7. Silver Chloride Anode 8. Platinum Cathode (sensor) 9.

  • Page 5: Meter Functional Description

    METER FUNCTIONAL DESCRIPTION METER FUNCTIONAL DESCRIPTION METER FUNCTIONAL DESCRIPTION METER FUNCTIONAL DESCRIPTION METER FUNCTIONAL DESCRIPTION 1) Liquid Crystal Display (LCD). 2) Range key, to select ppm or % range. 3) On/Off key, to turn the instrument ON and OFF. 4) CAL key, to enter/exit calibration mode. 5) Setup key, to enter/exit SETUP mode.
  • Page 6 10) GLP key, to display Good Laboratory Practice information. CFM key, to confirm different values. 11) AutoEnd key, to freeze first stable reading on the LCD. 12) Light key, to toggle display backlighting. 13) Secondary LCD. 14) Primary LCD.

  • Page 7: Specifications

    SPECIFICATIONS SPECIFICATIONS SPECIFICATIONS SPECIFICATIONS SPECIFICATIONS 0 . 0 0 . 5 . 0 0 0 . 0 C º 0 . 0 I T U 1 . 0 C ° ± l u f c s l e l a ±...

  • Page 8: Operational Guide

    Probes shipped from Hanna Instruments are dry. To hydrate the probe and prepare it for use, connect it to the meter and proceed as follows: 1.
  • Page 9 Turn the instrument ON by pressing On/Off. At start-up the display will show all the used segments for a few seconds (or while the button is held), followed by the percentage indication of the remaining battery life. • After a few seconds “Cond” message appears, the “...
  • Page 10 With the probe properly polarized, oxygen is continually consumed when it passes through the sensitive diaphragm and dissolves in the electrolyte solution contained in the probe. If polarization is interrupted, the electrolyte solution continues to be enriched with oxygen until it reaches an equilibrium with the surrounding solution.
  • Page 11 For accurate Dissolved Oxygen measurements, a water movement of 0.3 m/s is required. This is to ensure that the oxygen-depleted membrane surface is constantly replenished. A moving stream will provide adequate circulation. The use of a magnetic stirrer to ensure a certain fluid velocity is recommended.

  • Page 12: Autoend

    For an accurate calibration, it is recommended to wait at least 15 minutes to ensure precise conditioning of the probe. The zero calibration of the HI 9146 is very stable, therefore this procedure needs to be performed only whenever the probe or the membrane is replaced.
  • Page 13 INITIAL PREPARATION • Pour small quantities of HI 7040 Zero Oxygen solution into a beaker. If possible, use a plastic beaker to minimize any EMC interferences. • Make sure the probe is ready for measurements (see probe preparation on page 8), i.e. the membrane is filled with electrolyte and the probe is connected to the meter.
  • Page 14 • If the temperature is out of range “WRONG” tag together with the temperature and “°C” tag will blink. • HI 9146 has automatic buffer recognition function. If the ARROW keys are pressed to select the desired calibration value, the automatic buffer recognition function is disabled.

  • Page 15: Good Laboratory Practice (Glp)

    GOOD LABORATORY PRACTICE (GLP) GOOD LABORATORY PRACTICE (GLP) GOOD LABORATORY PRACTICE (GLP) GOOD LABORATORY PRACTICE (GLP) GOOD LABORATORY PRACTICE (GLP) GLP is a set of functions that allows storage and retrieval of data regarding the maintenance and status of the probe. All data regarding DO calibration is stored for the user to review when necessary.
  • Page 16 • The altitude value. • The salinity value. Press GLP at any moment and the instrument will return to measurement mode.

  • Page 17: Setup

    S E T U P S E T U P S E T U P S E T U P S E T U P Setup mode allows viewing and modifying the following parameters: • Salinity value (SAL) • Altitude value (ALt) •...

  • Page 18: Do Concentration Versus Salinity Chart

    DISSOLVED OXYGEN CONCENTRATION DISSOLVED OXYGEN CONCENTRATION DISSOLVED OXYGEN CONCENTRATION DISSOLVED OXYGEN CONCENTRATION DISSOLVED OXYGEN CONCENTRATION VERSUS SALINITY CHART VERSUS SALINITY CHART VERSUS SALINITY CHART VERSUS SALINITY CHART VERSUS SALINITY CHART Salinity affects the Dissolved Oxygen concentration expressed in ppm, decreasing its value. The table below shows the maximum oxygen solu- bility at various temperatures and salinity levels.

  • Page 19: Do Concentration Versus Altitude Chart

    DISSOLVED OXYGEN CONCENTRATION DISSOLVED OXYGEN CONCENTRATION DISSOLVED OXYGEN CONCENTRATION DISSOLVED OXYGEN CONCENTRATION DISSOLVED OXYGEN CONCENTRATION VERSUS ALTITUDE CHART VERSUS ALTITUDE CHART VERSUS ALTITUDE CHART VERSUS ALTITUDE CHART VERSUS ALTITUDE CHART Altitude affects Dissolved Oxygen concentration expressed in ppm, de- creasing its value. The table shows the maximum oxygen solubility at various temperatures and altitudes.

  • Page 20: Temperature Calibration (For Technical Personnel Only)

    TEMPERATURE CALIBRATION TEMPERATURE CALIBRATION TEMPERATURE CALIBRATION TEMPERATURE CALIBRATION TEMPERATURE CALIBRATION (for technical personnel only) All the instruments are factory calibrated for temperature. Hanna’s temperature probes are interchangeable and no temperature calibration is needed when they are replaced. If the temperature measurements are inaccurate, temperature recalibration should be performed.

  • Page 21: Batteries Replacement

    BATTERIES REPLACEMENT BATTERIES REPLACEMENT BATTERIES REPLACEMENT BATTERIES REPLACEMENT BATTERIES REPLACEMENT If the batteries become weak, the display will flash the battery symbol to advise the user that approx. 1 hour of working time is left. It is recommended to change the batteries as soon as the battery indicator blinks (lower frequency).

  • Page 22: Lcd Message Guide

    LCD MESSAGE GUIDE LCD MESSAGE GUIDE LCD MESSAGE GUIDE LCD MESSAGE GUIDE LCD MESSAGE GUIDE TAGS & SYMBOLS • Mode tags light up for indicating the corresponding active mode, and blink for warning the user. MEASURE on: Instrument in measurement mode. SETUP on: SETUP menu mode has been entered.

  • Page 23: Probe & Membrane Maintenance

    PROBE & MEMBRANE MAINTENANCE PROBE & MEMBRANE MAINTENANCE PROBE & MEMBRANE MAINTENANCE PROBE & MEMBRANE MAINTENANCE PROBE & MEMBRANE MAINTENANCE The oxygen probe body is made of reinforced plastic for maximum durability. A thermistor temperature sensor provides temperature measurements of the sample.
  • Page 24 IMPORTANT In order to have accurate and stable measurements, it is important that the membrane surface is in perfect condition. This semipermeable membrane isolates the sensor elements from the environment but allows oxygen to enter. If any dirt is observed on the membrane, rinse carefully with distilled or deionized water.

  • Page 25: Troubleshooting Guide

    T R O U B L E S H O O T I N G G U I D E T R O U B L E S H O O T I N G G U I D E T R O U B L E S H O O T I N G G U I D E T R O U B L E S H O O T I N G G U I D E T R O U B L E S H O O T I N G G U I D E...

  • Page 26: Accessories

    A C C E S S O R I E S A C C E S S O R I E S A C C E S S O R I E S A C C E S S O R I E S A C C E S S O R I E S HI 98501 Electronic thermometer (range: -50.0 to 150.0 °C)
  • Page 27 24 Vac or 60 Vdc. To avoid damage or burns, do not perform any measurement in microwave ovens. Hanna Instruments reserves the right to modify the design, construction and appearance of its products without advance notice.
  • Page 28 Hanna Instruments Inc. Highland Industrial Park 584 Park East Drive Woonsocket, RI 02895 USA Technical Support for Customers Tel. (800) 426 6287 Fax (401) 765 7575 E-mail tech@hannainst.com www.hannainst.com Local Sales and Customer Service Office Printed in EUROPE (ROMANIA) MAN9146Y 09/10...

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