User manual HANNA INSTRUMENTS C 102

[. . . ] Instruction Manual C 102 Multiparameter Turbidity & Ion Specific Meter This Instrument is in Compliance with the CE Directives www. hannainst. com Dear Customer, Thank you for choosing a Hanna Product. Please read this instruction manual carefully before using the instrument. This manual will provide you with the necessary information for the correct use of the instrument, as well as a precise idea of its versatility. If you need more technical information, do not hesitate to e-mail us at tech@hannainst. com. [. . . ] This is the sample. 1. 5 cm Insert the blank into the cuvet holder and make sure that the notch on the cap is positioned securely into the groove. Press ZERO. Insert the reacted sample into the cuvet holder and make sure that the notch on the cap is positioned securely into the groove. Turn the meter on and press both ALT and CAL momentarily. + The LCD will show four dashes on the upper and "d 00" on the lower part of the LCD with the second "0" blinking. Using the , and keys change the lower row of the display to show "d 21". Insert the previously prepared 50 NTU standard into the cuvet holder and make sure that the notch on the cap is positioned securely into the groove. Press . The display will blink "-Lt-" for several seconds, indicating that the LED is being adjusted for the turbidimetric channel. Afterwards, a sequence of numbers between -511 to 512 will appear on the upper part of the LCD indicating different levels of LED light intensity. In approximately one minute, the adjustment will be made and the calibration data stored in the non-volatile memory. The display will show four dashes again indicating the end of the span calibration procedure. Press the ALT and CAL keys together again to leave the diagnostic mode. + Two-point customized calibration To enter the turbidity calibration mode, the meter should be in "turbidity" mode. Use the and keys to set the lower level of the LCD to "tr". To enter the calibration mode, press and hold the ALT and CAL keys together for at least three seconds. The upper display will start flashing "CAL" for approximately three seconds. + To confirm entry into the calibration mode, press the CAL key again while "CAL" is blinking. 22 23 If the CAL key is not pressed, the upper display will show "----", indicating that calibration mode was not entered. In which case, hold down the ALT and CAL keys together for 3 seconds to restart the procedure. After entering the calibration mode, the display will show the first point of the previous calibration. Using the , , keys, set the turbidity of first calibration standard (from 0. 00 to 50. 0 NTU). Insert the standard vial into the cuvet holder and ensure that the notch is positioned securely into the groove. The display will indicate Sample In Progress (SIP). After the second calibration point is memorized, the unit will store the calibration data together with time and date in the EEPROM while intermittently indicating "CAL" and "Stor" for several seconds. Subsequently, the upper display will show "----", indicating that the meter is calibrated and ready to measure turbidity of an unknown sample. By pressing CAL during calibration, user can quit the calibration mode at any time without changing the previously stored calibration data. After the first calibration point is memorized, the LCD will indicate the second point of the previous calibration with the most significant digit blinking. Using the , , keys, set the turbidity of the second calibration standard (from 0. 00 to 50. 0 NTU). Insert the standard into the cuvet holder and make sure that the notch is positioned securely into the groove. The display will indicate "SIP" again. COLORIMETRIC CALIBRATION Zero calibration To calibrate the span of the meter, fill the cuvet with a clean deionized water sample. Inspect and thoroughly clean the surface of the vial. Turn the meter on and press both ALT and CAL momentarily. + The display will show four dashes and "d 00". [. . . ] Check for scratches on the cuvet and ensure that sample is not excessively turbid. If the problem persists, recalibrate the meter using deionized water in the diagnostic mode "31" (see Calibration). Make sure the cuvet is capped and placed properly in the holder, and that ambient light does not reach the photodetector. If the problem persists, contact your dealer or the nearest Hanna Office. [. . . ]