User manual HANNA INSTRUMENTS HI 9828

[. . . ] Instruction Manual HI 9828 Multiparameter w w w. h a n n a i n s t . c o m 1 2 Hanna Instruments reserves the right to modify the design, construction and appearance of its products without advance notice. 3 Dear Customer, Thank you for choosing a Hanna Instruments product. Please read this instruction manual carefully before using the instrument. It will provide you with the necessary information for correct use of the instrument, as well as a precise idea of its versatility. If you need additional technical information, do not hesitate to e-mail us at tech@hannainst. com or see the back cover for our worldwide contact list. [. . . ] · When the reading is stable and close to the selected buffer the display shows the message "Ready". · Press CONFIRM to accept the value or BUFFER to change the buffer value. · After the second calibration point is confirmed, proceed as above by immersing the probe in the third buffer solution, stirring gently and waiting for the measure stability. · At the end of calibration on display the following messages appear: "Storing data on probe, please wait. . . ", "Updating GLP data, please wait . . . " and "Calibration completed". · Press OK to close the last message and return to the calibration menu. · To return to the main menu, from the calibration menu, press ESC repeatedly. NOTE: the user can quit the pH calibration mode at any time, after 1 or 2 confirmed buffers, by pressing the ESC key. Custom buffer calibration HI 9828 allows a one point calibration with a custom buffer value, set by the 32 user. · To select this option, when the meter is waiting for a stable measure, press the BUFFER key and then CUSTOM. · The display shows a window with a textbox for inserting the desired custom value. 4. 2. 3 Error list If during pH calibration the measure is stable but the meter does not accept the value, on display a short message appears, indicating the possible error source, like in these examples: Possible messages are: "Input out of scale": pH is out of scale "Wrong buffer": this message appears when the difference between the pH reading and the value of the selected buffer is too big. If the error message is displayed, check if you have selected the proper calibration buffer. "Invalid temperature": this message appears if the temperature of the buffer is outside the defined buffer temperature range. "Wrong & contaminated buffer/ check electrode": this message appears if the buffer used is contaminated or the electrode is supposed to be either broken or very dirty. "Wrong & check electrode/ clean electrode": this message appears if the electrode is supposed to be broken or very dirty. 33 "Wrong & clear old calibration": this message appears as a result of an erroneous slope condition. If the slope between current calibration point and one of the previous calibration, that was not overriden in current calibration, exceeds slope window (80% to 110%), this message will appear. Press CLEAR to clear old parameters and continue calibration process or ESC to leave calibration. 4. 3 DISSOLVED OXYGEN CALIBRATION If D. O. % saturation range is calibrated, D. O. % saturation value is the result of a comparison between the concentration of oxygen in air (100 % ) and in water, so it is suggested to calibrate the probe near the area where the measurements will be taken in order to have the best accuracy. % saturation, temperature, salinity and atmospheric pressure so it is recommended to use a standard solution or a reference D. O. % saturation calibration can be performed at 1 or 2 standard points (0 % and 100 %), or at a single custom point (50 to 500 %). concentration calibration can be performed at a single custom point (4 to 50 mg/L). [. . . ] · With the sensor facing down screw the cap clockwise to the end of the threads. If any deposit scales the sensors, gently brush the sensor surface with the supplied brush, while paying attention to not damage the plastic body. This is normal with electrodes and they will disappear when rinsed with water. · Shake the electrode down as you would do with a clinical thermometer to eliminate any air bubbles inside the glass bulb. [. . . ]