Instruction Manual HI 8043 Portable Dissolved Oxygen Meter DO me ter HI 804 3 STB °C OFF O2 ZERO SLOPE °C ins rum ns This Instrument is in Compliance with the CE Directives 1
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 the correct use of the instrument, as well as a more precise idea of its versatility in a wide range of applications. If you need additional technical information, do not hesitate to e-mail us at tech@hannainst.com. This instrument is in compliance with the directives.
PRELIMINARY EXAMINATION Remove the instrument from the packing material and examine it to make sure that no damage has occurred during shipping. If there is any damage, notify your Dealer.
brane isolates the sensor elements from the sample tested, but allows oxygen to enter. A voltage is applied across the sensor, and the oxygen that has passed through the membrane reacts causing the current to flow, hence determining a reading. A convenient feature of the instrument is its standby mode which keeps the probe polarized and ready for instant measurements. FUNCTIONAL DESCRIPTION PROBE 1. 2. 3. 4. 5. 6. 7. 8. 9. D.O.
FUNCTIONAL DESCRIPTION 1 3 DO meter HI 8043 2 STB 4 °C O2 OFF 5 9 6 7 ZERO SLOPE °C 8 ins rum n s 1.Liquid Crystal Display 2."OFF" (to switch the meter off) 3."STB" (to switch the meter on and polarize the probe. Use this standby position without switching the meter off if you are going to take further measurements) 4."°C" Measurement 5."O2" Measurement 6.ZERO Calibration Trimmer 7.SLOPE Calibration Trimmer 8.°C Calibration Trimmer 9.
SPECIFICATIONS Range DO °C 0.00 to 19.99 mg/l 0.0 to 50.0°C (32 to 122 °F) Resolution DO °C 0.01 mg/l 0.1°C Accuracy DO °C ±1.5% of full scale ±0.5°C Typical EMC DO Deviation °C ±1.5% of full scale ±1°C Calibration Temperature Compensation Manual on 2 points Automatic from 0 to 30°C (32 to 86°F) Probe HI 76401 polarographic with 3 m cable Battery 9V / 100 hours of continuous use Environment 0 to 50°C (32 to 122°F); 95% RH Dimensions 180 x 83 x 40 mm (7.1 x 3.3 x 1.
INITIAL PROBE PREPARATION PROBE PREPARATION All 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 Remove the red and black Shipping cap plastic cap. This cap is for shipping purposes and can be thrown away. black 2 Wet the sensor by soaking the bottom 2½ cm (1") of the probe in electrolyte red (HI 7041S) for 5 minutes. 3 Rinse the supllied membrane (HI 76407A) with electrolyte while shaking it gently.
PROBE POLARIZATION When the probe is under polarization it is continuously fed with a voltage of approximately 800 mV. Probe polarization is essential for stable measurements to be taken with the same recurring degree of accuracy. In the presence of the polarized probe, oxygen is continually "consumed" by passing through the sensitive diaphragm and dissolving in the electrolyte solution contained in the probe.
DISSOLVED OXYGEN CALIBRATION The calibration should be verified: - After approximately 20 hours of use. - Whenever the electrolyte or membrane is changed and after cleaning the electrode. - After excessive use in aggressive solutions.
In this case, switch back STB °C O to "STB" position, place OFF the protective cap and wait for a few hours for complete polarization before proceeding. Using a small screwdriver, turn the Zero Calibration screw until the display reads zero. 2 • ZERO SLOPE °C • If the zero point is passed, "1" will appear on the display. If you cannot get zero reading the probe is probably defective, in which case you should check the membrane, electrode and electrolyte solution (see below).
• • Refer to Table 1 on page 10 for the corresponding dissolved oxygen reading at that temperature. Switch to "O2" position STB °C and adjust the "Slope" OFF O trimmer until the correct reading is displayed; e.g. at 20.5°C the trimmer should be adjusted until display reads 9.08. 2 ZERO SLOPE °C CORRECTION FOR ALTITUDE EFFECT If the calibration is not performed at sea level a correction should be made for the difference in altitude according to Table 2 on page 11; e.g. if calibrated at 20.
Table 1 Dissolved Oxygen (ppm) in Fresh Water as a function of Temperature (°C) °C 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 0.0 14.62 14.23 13.84 13.48 13.13 12.80 12.48 12.17 11.87 11.59 11.33 11.08 10.83 10.60 10.37 10.15 9.95 9.74 9.54 9.35 9.17 8.99 8.83 8.68 8.53 8.38 8.22 8.07 7.92 7.77 7.63 7.50 7.40 7.30 7.20 7.10 7.00 6.90 6.80 6.70 6.60 6.50 6.40 6.30 6.20 6.10 6.00 5.90 5.80 5.70 5.60 0.1 14.
Table 2 Correction for measurements at different altitude ALTITUDE (METERS) Sea level 50 100 150 200 300 400 500 600 700 800 900 1000 1100 1200 1300 1400 1500 1600 1700 1800 1900 ATMOSPHERIC PRESSURE KPa 101.3 100.7 100.1 99.4 98.8 97.6 96.4 95.2 94.0 92.8 91.7 90.5 89.4 88.3 87.2 86.1 85.0 84.0 82.9 81.9 80.9 79.9 13 CORRECTION FACTOR 1.00 0.99 0.99 0.98 0.98 0.96 0.95 0.94 0.93 0.92 0.90 0.89 0.88 0.87 0.86 0.85 0.84 0.83 0.82 0.81 0.80 0.
Table 3 Correction for salinity effect °C 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 Quantity to be °C subtracted per mg/l of NaCl 0.0892 0.0861 0.0830 0.0802 0.0779 0.0749 0.0724 0.0701 0.0678 0.0657 0.0637 0.0618 0.0599 0.0582 0.0565 0.0549 0.0533 0.0519 0.0505 0.0491 0.0478 0.0466 0.0454 0.0442 0.0431 0.0421 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 14 Quantity to be subtracted per mg/l of NaCl 0.0410 0.0400 0.0391 0.0382 0.0373 0.0364 0.
TEMPERATURE CALIBRATION The temperature should be calibrated at least every 3 months or whenever the readings are in doubt, using the following procedure: • Immerse the bottom 60 mm (2.4") of the probe in a beaker of water. • Switch the instrument to °C. • Agitate the water for at least 10 minutes until thermal equilibrium between the probe and water is achieved. • Check the temperature of the water using ChecktempC or a thermometer with a resolution of 0.1°C (e.g. 20.0°C).
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. For accurate dissolved oxygen measurements a water movement of 0.3 m/sec is required at a minimum. This is to ensure that the oxygen-depleted membrane surface is constantly replenished. A moving stream will provide adequate circulation. To quickly check if the water speed is sufficient, wait for the reading to be stable and then move the D.O. probe.
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 tested. It is always recommended that the protective cap be kept on the probe when the probe is not in use to provide protection against damage and dirt.
• • Make sure that the rubber O-ring is seated properly inside the membrane cap. With the sensor facing down, screw the membrane cap clockwise. Some electrolyte will overflow. The Platinum cathode (#8 in the Functional Description at page 2) 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. You can use a clean lint-free cardboard or cloth.
BATTERY REPLACEMENT When the battery is rundown "V" is displayed on the Liquid Crystal Display to warn the user. V This is to inform the user that the display will be shut-off after about 4 hours of use to prevent erroneous measurements being taken due to low voltage. Battery replacement must only take place in a non hazardous area using the battery types specified in this instruction manual (see page 17).
ACCESSORIES BATT9/P 9V battery (10 pcs) HI 7040M Zero Oxygen calibration solution, 230 mL HI 7040L Zero Oxygen calibration solution, 460 mL HI 7041S Refilling Electrolyte solution, 30 mL HI 76401 D.O.
WARRANTY All Hanna Instruments meters are warranted for two years against defects in workmanship and materials when used for their intended purpose and maintained according to the instructions. The probes are warranted for a period of six months. Damages due to accident, misuse, tampering or lack of prescribed maintenance are not covered. This warranty is limited to repair or replacement free of charge. If service is required, contact the dealer from whom you purchased the instrument.
CE DECLARATION OF CONFORMITY Recommendations for Users Before using this product, make sure that it is entirely suitable for the environment in which it is used. Operation of this instrument in residential area could cause unacceptable interferences to radio and TV equipments, requiring the operator to take all necessary steps to correct interferences. Any variation introduced by the user to the supplied equipment may degrade the instrument's EMC performance.
HANNA PRODUCTS • CALIBRATION AND MAINTENANCE SOLUTIONS • CHEMICAL TEST KITS • CHLORINE METERS • CONDUCTIVITY/TDS METERS • DISSOLVED OXYGEN METERS • HYGROMETERS • ION SPECIFIC METERS • MAGNETIC STIRRERS • Na/NaCl METERS • pH/ORP/Na ELECTRODES • PROBES (DO, µS/cm, RH, T, TDS) • PUMPS • REAGENTS • SOFTWARE • THERMOMETERS • TITRATORS • TRANSMITTERS • TURBIDITY METERS • Wide Range of Accessories Most Hanna meters are available in the following formats: • BENCH-TOP METERS • POCKET-SIZE METERS • PORTABLE METERS •
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