Hanna Instruments HI 9142 Instruction Manual

oxygen solution and stir gen- tly for 2-3 minutes. • Allow 2 minutes for the LCD readout to stabilize. • Adjust the zero D.O. calibra- tion trimmer until the display reads "0.0". Note The zero calibration screw is located close to the probe connector. SLOPE CALIBRATION It is suggested to perform the slope calibration in satured air. • Rinse the probe in a large amount of clean water to remove any residual zero oxygen solution. • Dry the probe tip and allow a few minutes for the LCD readout to stabilize. • Press and hold the CA ...

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. In fact, altitude affects D.O. concentration decreasing its value. The follow- ing table reports the oxygen solubility at various temperatures and altitudes, based on sea level barometric pressure of 760 mm Hg. This ...

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 interfer- ences 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. To avoid electrical shock, do not use this instrument when voltages at the measure- ment surface exceed 24 Vac or 60 Vdc. To ...

for two years against defects in workmanship and materials when used for their intended purpose and maintained according to the in- structions. The probes are warranted for a period of six months. Damages due to accidents, misuse, tampering or lack of prescribed maintenance are not cov- ered. This warranty is limited to repair or re- placement free of charge. If service is required, contact the dealer from whom you purchased the instrument. If under warranty, report the model number, date of purchase, serial number and the nature of the ...

The oxygen probe body is made of reinforced plastic for maximum durability. A thermistor temperature sensor provides tem- perature 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 elec- trolyte, proceed as follows: • Remove the protective cap by gently twisting and pull- ing it off (see fig. 1). • Unscrew the membrane by turning it counter- clock-wise (see fig. 2) • Wet the sensor by soak- ing the bottom (2.5 cm) of the p ...

oxygen solution and stir gen- tly for 2-3 minutes. • Allow 2 minutes for the LCD readout to stabilize. • Adjust the zero D.O. calibra- tion trimmer until the display reads "0.0". Note The zero calibration screw is located close to the probe connector. SLOPE CALIBRATION It is suggested to perform the slope calibration in satured air. • Rinse the probe in a large amount of clean water to remove any residual zero oxygen solution. • Dry the probe tip and allow a few minutes for the LCD readout to stabilize. • Press and hold the CA ...

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for two years against defects in workmanship and materials when used for their intended purpose and maintained according to the in- structions. The probes are warranted for a period of six months. Damages due to accidents, misuse, tampering or lack of prescribed maintenance are not cov- ered. This warranty is limited to repair or re- placement free of charge. If service is required, contact the dealer from whom you purchased the instrument. If under warranty, report the model number, date of purchase, serial number and the nature of the ...