User manual HANNA INSTRUMENTS HI 83749

[. . . ] SALES AND TECHNICAL SERVICE CONTACTS Tel. (03) 9769. 0666 · Fax (03) 9769. 0699 Tel. (10) 88570068 · Fax (10) 88570060 Tel. (07851) 9129-0 · Fax (07851) 9129-99 Tel. [. . . ] The RTC time is used to generate a unique time stamp for each recorded value and to automatically store the last calibration date. The current time can be displayed on the LCD when the instrument is in measurement mode. · To set the current date, press CAL/RCL when the "Set date" panel is displayed. The last two digits of the year value and CFM tag will start blinking. · Press the UP or DOWN keys to set the year value. · Press LOG/CFM or READ to start editing the month value. · Press the UP or DOWN keys to set the month value. 32 DISPLAY DESCRIPTION or or BEEPER 1) Battery icon. This icon appears when the status of the battery is displayed or when the battery voltage is getting low. It is displayed when the instrument performs an internal checkup. When average or continuous mode is selected, the "NTU" tag blinks for each new displayed value. For conversions in other units see Measurement Units section. 6) AVG icon appears when the Signal Average Mode is selected. 7) Four digit secondary display. A long beep indicates an error or an invalid key pressed. A short beep means that the current operation is confirmed. 9 GENERAL TIPS FOR AN ACCURATE MEASUREMENT GENERAL TIPS · · · · The instructions listed below should be carefully followed to ensure best accuracy. Always cap the cuvets to avoid spillage of the sample into the instrument. Always close the lid of the instrument during measurement. Keep the lid of the instrument closed when it is not used to prevent dust or dirt entering. Put always the instrument on a flat, rugged surface when taking measurements. SET EPA COMPLIANCE MODE When EPA compliance reading is on, "EPA" message is displayed on the secondary LCD and the reported values are rounded to meet EPA reporting requirements. CUVET The cuvet is part of the optical system and measurements can be affected by the glass imperfections, dirt, dust, scratches, or fingerprints present on the cuvet surface. · To edit the EPA mode, press CAL/RCL when EPA compliance reading panel is displayed. The parameter setting and "CFM" tag will start blinking. · Press the UP or DOWN keys to set the EPA compliance mode on or off. [. . . ] · The final displayed value is the averaged reading. · Remove cuvet #1 from the instrument and open the cap. · Use the 1000 µL automatic pipette to add exactly 1 mL of HI 83749-0 Bentocheck reagent to the cuvet. For a correct use of the automatic pipette please follow the related Instruction Sheet. [. . . ]