User manual HANNA INSTRUMENTS HI 98188

[. . . ] Instruction Manual HI 98188 USP Compliant EC, TDS, NaCl, Resistivity, Temperature Meter EC/TDS/NaCl/Resistivity Meter HI 98188 w w w. c o m 1 Dear Customer, Thank you for choosing a Hanna Instruments product. Please read this instruction manual carefully before using the instruments. This manual will provide you with the necessary information for correct use of the instruments, as well as a precise idea of their versatility. [. . . ] The points confirmed in current calibration are kept. Note: If Clear calibration is invoked during the first calibration point, the instrument returns to measurement mode. REPLACE CALIBRATION STANDARD Each time a standard is confirmed the new calibration parameters replace the old calibration parameters of the corresponding standard. If the current standard has no correspondance in the existing stored calibration structure and this is not full, the current standard is added to the existing stored calibration (up to 5 standards). If the existing stored calibration is full (five calibration points) after confirming the calibration point, the instrument will ask wich buffer will be replaced by current standard. Press ARROW keys to select another standard to be replaced. Press CFM to confirm the standard that will be replaced. In this case, the standard will not be memorised. Note: The replaced standard is not removed from calibration list and it can be selected for the next calibration points. NaCl CALIBRATION NaCl calibration is a one-point procedure in 100. 0% NaCl solution. Use the HI 7037L calibration solution (sea water solution) as a 100% NaCl standard solution. · To enter NaCl calibration select the Salinity % range and press CAL. 31 · The instrument enters the Salinity calibration screen. The measured % NaCl, the temperature and the 100% NaCl standard are displayed. · Rinse the probe with some of the calibration solution or deionized water. Immerse the probe into HI 7037L solution. Tap the probe repeatedly to remove any air bubbles that may be trapped inside the sleeve. · The " " tag will blink on the LCD until the reading is stable. · When the reading is stable, the CFM functional key is displayed. Press CFM to confirm calibration. · The instrument returns to measurement mode. Notes: · If the uncalibrated reading is too far from the expected value, calibration is not recognized. The "Wrong" message will be displayed. · The meter uses 1. 90 %/°C temperature compensation factor during calibration. If the "Temperature Coef" in the Setup menu has been set to a different value, when exiting calibration mode, the displayed value might be different from the nominal standard value. 32 GOOD LABORATORY PRACTICE (GLP) GLP is a set of functions that allows storage and retrieval of data regarding the maintenance and status of the electrode. All data regarding EC and NaCl calibration is stored for the user to review when necessary. [. . . ] The replatinization process takes about 5 minutes. Remove the probe from the replatinization solution and rinse it with deionizated water. ACCESSORIES EC CALIBRATION SOLUTIONS HI 70033C HI 70031C HI 70039C HI 70030C HI 6033 HI 6031 HI 7039L HI 7030L HI 7034L HI 7035L HI 7037L 84 mS/cm, 20 ml sachet, 25 pcs. 84 mS/cm, 500 ml, bottle 1413 mS/cm, 500 ml, bottle 5000 mS/cm, 500 ml, bottle 12880 mS/cm, 500 ml, bottle 80000 mS/cm, 500 ml, bottle 114800 mS/cm, 500 ml, bottle 100% NaCl, 500 ml, bottle RECOMMENDATIONS FOR USERS Before using these products, make sure they are entirely suitable for the environment in which they are used. Operation of these instruments in residential areas could cause unacceptable interferences to radio and TV equipment, requiring the operator to follow all necessary steps to correct interferences. The glass bulb at the end of the pH electrode is sensitive to electrostatic discharges. [. . . ]