User manual HANNA INSTRUMENTS HI 9147

[. . . ] If under warranty, report the model number, date of purchase, serial number and the nature of the failure. If the repair is not covered by the warranty, you will be notified of the charges incurred. If the instrument is to be returned to Hanna Instruments, first obtain a Returned Goods Authorization Number from the Customer Service department and then send it with shipment costs prepaid. When shipping any instrument, make sure it is properly packaged for complete protection. GENERAL DESCRIPTION Oxycheck is a water-resistant Dissolved Oxygen meter with manual calibration, automatic temperature compensation (ATC), salinity compensation and direct probe. [. . . ] the membrane is filled with electrolyte (see "Probe Preparation" section for details). Switch the meter on, select the % mode and turn the % trimmer to display 100%. If the environmental relative humidity is lower than 30%, pour some deionized water (approx. Keep the probe in vertical position to avoid any contact of the membrane with the water. Note: For best accuracy, calibration should be performed on the measurement site, and the probe should be at the same temperature as the air. Note: After replacing the membrane or the electrolyte solution, wait a few minutes for the reading to stabilize. SALINITY COMPENSATION Oxygen measurements (mg/L range only) can be compensated for salinity factor and the correction value can be set by the user. Keep the SAL button pressed while turning the SAL trimmer to display the desired salinity value (within the 0 to 51 g/L range). BATTERY RECHARGE & REPLACEMENT The instrument features a battery level control system: the "V" tag on the LCD lights up to advise the user that only a few hours of working life are left. The instrument is also provided with BEPS (Battery Error Preventing System), which turns the meter off if the battery level is too low to ensure reliable readings. The 9V battery provided with the instrument can be recharged using the optional HI 710040 battery recharger. Plug the recharger and the green LED will turn on, then put the meter on the recharger and the LED will turn to orange, to indicate that the battery is charging. ALTITUDE COMPENSATION When salinity compensation is not required (i. e. not salty water), the SAL trimmer can be used to set the altitude correction value. Keep the SAL button pressed while turning the SAL trimmer to display the salinity value corresponding to the desired altitude. Rinse the supplied membrane (HI 76409A) with electrolyte while shaking it gently. Gently tap the membrane over a surface to ensure that no air bubbles remain trapped. To avoid damaging the membrane, do not touch it with your fingers. TAKING MEASUREMENTS Ensure the meter has been calibrated. Ensure the temperature sensors are immersed in the sample to be tested. reading can be displayed in % air saturation or in ppm (mg/L); press the corresponding key to enter the desired mode. The instrument also measures the temperature: press the "°C" button to display the temperature value of the tested solution. For accurate dissolved oxygen measurements a water movement of at least 5-7 cm/sec is required. In this way a constant replenishment of the oxygen-depleted membrane surface is ensured. [. . . ] When the battery needs to be replaced, remove the cover on the rear of the meter and replace the rundown battery with a new one, while paying attention to the correct polarity. Replacement should take place in a non-hazardous area using a 9V Ni-MH rechargeable battery. Note: The meter can also be powered with a normal 9V alkaline battery. Note: Dispose of the Ni-MH battery according to local regulations. 4. Whit the sensor facing down screw the cap clockwise to the end of the threads. [. . . ]