User manual HANNA INSTRUMENTS C 114

[. . . ] Instruction Manual C 114 Multiparameter Turbidity & Free and Total Chlorine 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. [. . . ] The unit will store the newly set month-day data in its EEPROM and will show the current time by a 24 hour clock HH. MM format, e. g. 2:28 pm is: Similarly, make the necessary adjustments as described above and press . Press READ. Press ALT and CAL until four dashes are displayed on the upper display and "# fn" are shown in the lower part of the LCD. The meter will show "SIP" for a few seconds and then the concentration: Using the and keys select the number from 0 to 1 where the appropriate calibration data have been stored. Shake and allow a few seconds for color to develop. Measurements in user-customized mode Note: The meter must be calibrated for this purpose. Follow the two-point customized calibration on page 26 before proceeding. Turn the meter on and by momentarily pressing both ALT and CAL. + 16 Insert the reacted sample into the cuvet holder and make sure that the notch on the cap is 17 positioned securely into the groove. Press READ. CALIBRATION TURBIDITY CALIBRATION The meter should be properly calibrated with a standard prepared as described in USEPA method 180. 1. Span calibration To calibrate the span of the meter, fill the cuvet with the primary turbidity formazine standard of 50 NTU. Inspect and clean thoroughly the surface of the vial. Shake the standard vigorously for a few seconds and wait a few minutes for the bubbles to disappear. Turn the meter on and press both ALT and CAL momentarily. The meter will first show "SIP" for a few seconds and afterwards the sample concentration: + 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 . 18 19 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. 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. [. . . ] This message appears for a few seconds and then the meter will completely switch itself off. Batteries should only be replaced in a safe area using 1. 5V AA alkaline type. In order to replace the batteries, simply remove the two screws on the rear cover of the instrument and replace all four 1. 5V AA batteries with new ones, while paying attention to their polarity. 31 REVIEWING THE CURRENT LOT NUMBER To check the current (vacant) lot number, while in log mode, press ALT and together. USER-SELECTABLE SHUTDOWN With C 114, the users can customize the shutdown time to save power. To change the shutdown time, enter the diagnostic mode by momentarily pressing the ALT and CAL keys together. [. . . ]