Related Manuals for Hanna Instruments HI 9142
Summary of Contents for Hanna Instruments HI 9142
- Page 1 Instruction Manual HI 9142 Portable Waterproof Dissolved Oxygen Meter w w w . h a n n a i n s t . c o m...
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Page 2: Table Of Contents
Dear Customer, Thank you for choosing a Hanna Instruments Product. Please read this instruction manual carefully before using the instrument. This manual will provide you with all the necessary information for correct use of the instrument, as well as a precise idea of its versatility. -
Page 3: Preliminary Examination
GENERAL DESCRIPTION HI 9142 is a rugged, waterproof meter that solves the common problems of field use, such as cold, rain, snow and dust, that can damage a meter, rapidly deteriorating its performance and life. -
Page 4: Probe Functional Description
PROBE FUNCTIONAL DESCRIPTION 1. D.O. probe 2. Protective cap 3. Shielded cable 4. Polypropylene probe body 5. Temperature sensor 6. O-Ring seal 7. Silver chloride (AgCl) anode 8. Platinum cathode (sensor) 9. Oxygen permeable membrane 10. Membrane cap... -
Page 5: Meter Functional Description
METER FUNCTIONAL DESCRIPTION 1. Liquid Crystal Display (LCD) 2. On/Off button 3. °C/°F Celsius or Fahrenheit selection button 4. Zero oxygen calibration button 5. Battery compartment cap 6. Probe connector (DIN7) 7. Calibration button 8. Secondary LCD line 9. Primary LCD line 10. -
Page 6: Specifications
SPECIFICATIONS 9 . 9 L / g p p ( . 5 - 0 . 0 C ° 0 . 3 0 . 2 ) F ° 1 . 0 L / g o s e t u l n o i 1 . -
Page 7: Probe Initial Preparation
PROBE INITIAL PREPARATION Probe Preparation All D.O. probes from Hanna Instrument are shipped dry. To hydrate the probe and prepare it for use, connect it to the meter and proceed as follows. 1. Remove the red & black plastic cap. This Shipping cap is used for shipping purposes only and can be thrown away. - Page 8 Connect the probe to the instrument. Turn the instrument ON by pressing On/Off. At start-up the display will show all the used segments for a few seconds followed by the percentage indication of the remaining battery life. • After a few seconds “Cnd Prb”...
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Page 9: Calibration Procedure
PROBE POLARIZATION The probe is under polarization with a fixed voltage of approximately 800 mV. Probe polarization is essential for stable measurements with the same recurring degree of accuracy. With the probe properly polarized, oxygen is continually “consumed“ by passing through the sensitive diaphragm and dissolving in the electrolyte solution contained in the probe. - Page 10 • When the reading is stable, the message “Press CAL, .., meter is calibrated“ will be displayed. • Press CAL to exit zero calibration. The zero calibration of the HI 9142 is very stable, therefore this procedure needs only to be performed whenever the probe is replaced.
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Page 11: Taking Measurements
TAKING MEASUREMENTS Make sure the meter has been calibrated and the protective cap has been removed. Immerse the tip of the probe in the sample to be tested. Make sure the temperature sensor is also immersed. For accurate dissolved oxygen measurements a water movement of 0.3 m/sec is required at a minimum. -
Page 12: Altitude And Salinity Compensation
ALTITUDE AND SALINITY COMPENSATION If the sample contains salts or if you are performing the measurements at a different altitude than sea level, the readout values must be corrected, taking into account the lower degree of oxygen solubility. ALTITUDE COMPENSATION All the readouts are referred at sea level, thus the displayed measurements are higher than the actual values. - Page 13 The table below shows the influence of salt in the measurement of oxygen. In HI 9142 all the readouts are referred to 0 g/L of salinity value. In fact, salinity affects D.O. concentration decreasing its value. For your reference the table below reports the oxygen solubility at various temperatures and salinity.
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Page 14: Probe And Membrane Maintenance
PROBE AND MEMBRANE MAINTENANCE The oxygen probe body is made of reinforced plastic for maximum durability. A thermistor temperature sensor provides temperature measurement and compensation. When not in use, it is always recommended to protect the probe against damage and dirt using the supplied cap. To replace the membrane or refill with electrolyte, proceed as follows: •... - Page 15 The Platinum cathode (#8 in the Functional Description at page 4) should always be bright and untarnished. If it is tarnished or stained, which could be due to contact with certain gases or extended use with a loose or damaged membrane, the cathode should be cleaned.
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Page 16: Battery Replacement
BATTERY REPLACEMENT When the battery level is low, “BATT“ tag is displayed blinking on the LCD 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. -
Page 17: Accessories
ACCESSORIES HI 7040L Zero oxygen solution, 500 mL HI 7041S Refilling electrolyte solution, 30 mL HI 7041M Refilling electrolyte solution, 230 mL HI 7041L Refilling electrolyte solution, 500 mL HI 76407/4 D.O. probe with 4 m (13') cable HI 76407/10 D.O. -
Page 18: Warranty
WARRANTY HI 9142 is guaranteed for two years against defects in workmanship and materials when used for their 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 19 In particular cases the meter could turn off. In these cases it can be turned on by pressing the ON/OFF key. Hanna Instruments reserves the right to modify the design, construction or appearance of its products without advance notice.
- Page 20 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 MAN9142Z 04/14 Printed in ROMANIA...
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