Instruction Manual HI 9146 Portable Waterproof Microprocessor Dissolved Oxygen Meter w w w . h a n n a i n s t .
Dear Customer, Thank you for choosing a Hanna Product. Please read this instruction manual carefully before using the instrument. This manual will provide you with the necessary information for a correct use of the instrument, as well as a precise idea of its versatility. If you need more technical information, do not hesitate to e-mail us at tech@hannainst.com This meter is in compliance with directives.
Salinity compensation in water allows determination of mg/L of dissolved oxygen in salty waters and the altitude compensation readjusts for the altitude variance. Four 1.5V AA alkaline batteries provide power and make the instrument completely portable. HI 9146 is also designed to be used with a battery recharger or a 12 Vdc power supply. A 12 Vdc input jack is incorporated into the housing. A microprocessor ensures an accurate and rapid calibration and measurement.
SPECIFICATIONS PROBE PREPARATION 0.00 to 45.00 mg/L O2 0.0 to 300 %O2 0.0 to 50.0 °C Resolution 0.01 mg/L O2 0.1 %O2 0.1 °C Accuracy ±1.5% Full Scale mg/L O2 (@25°C/77°F) ±1.5% Full Scale %O2 ±0.5 °C Typical EMC ±0.3 mg/L O2 / ±3.5 %O2 Deviation ±0.
CALIBRATION 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 inside the probe.
If the sample contains significant salinity or if the measurement is taken at a higher altitude than sea level, the read-out values must be corrected (by taking into account the lower degree of oxygen solubility in such conditions - see below). Set the altitude and/or the salinity before calibration and taking mg/L measurements. The meter will automatically compensate for these factors. MEASUREMENT Make sure the meter has been calibrated and the protective cap has been removed.
ALTITUDE COMPENSATION Press FACTOR and “F1” will be displayed. SALINITY COMPENSATION FACTOR ppm SAMPLE F1 Use the UP and the DOWN keys to set the altitude from 0 and 4.0 km (4000 m), in steps of 0.1 km (100 m). or Press FACTOR twice and “F2” will be displayed. Press UP and DOWN to set the salinity between 0 and 80 g/L. Press FACTOR again to display the temperature.
PROBE & MEMBRANE MAINTENANCE The oxygen probe body is made of reinforced polypropylene for maximum durability. A thermistor sensor measures temperature of the sample. It is recommended that the protective cap be always kept on the probe when the probe is not in use. To replace the membrane or refill it with electrolyte, proceed as follows: • Remove the protective cap by gently twisting and pulling it off the probe (see fig. 1). • Unscrew the membrane by turning it counterclockwise (see fig.
BATTERY REPLACEMENT When the batteries are run down "LOBAT" is displayed on the Liquid Crystal Display. This is to inform the user that the display will be shut-off after about 4 hours of use to prevent erroneous measurements due to low voltage. LOBAT SAMPLE Use only the Hanna voltage adapters (such as HI 710005 or HI 710006 - see below) with proper polarity configuration. ppm °C Battery replacement must only take place in a non-hazardous area using alkaline batteries.
WARRANTY CE DECLARATION OF CONFORMITY All Hanna meters are warranted for two years against defects in workmanship and materials when used for their intended purpose and maintained according to the instructions. Probes are warranted for six months. This warranty is limited to repair or replacement free of charge. Damages due to accidents, misuse, tampering or lack of prescribed maintenance are not covered. If service is required, contact the dealer from whom you purchased the instrument.
SALES AND TECHNICAL SERVICE CONTACTS Australia: Tel. (03) 9769.0666 • Fax (03) 9769.0699 China: Tel. (10) 88570068 • Fax (10) 88570060 Egypt: Tel. & Fax (02) 2758.683 Germany: Tel. (07851) 9129-0 • Fax (07851) 9129-99 Greece: Tel. (210) 823.5192 • Fax (210) 884.0210 Indonesia: Tel. (21) 4584.2941 • Fax (21) 4584.2942 Japan: Tel. (03) 3258.9565 • Fax (03) 3258.9567 Korea: Tel. (02) 2278.5147 • Fax (02) 2264.1729 Malaysia: Tel. (603) 5638.9940 • Fax (603) 5638.9829 Singapore: Tel. 6296.
