User manual HANNA INSTRUMENTS HI 84430

[. . . ] Instruction Manual TOTAL ACIDITY MINITITRATOR & pH METER for Water Analysis HI 84430 w w w. c o m 1 Dear Customer, Thank you for choosing a Hanna product. This manual will provide you with the necessary information for the correct use of the instrument. Please read it carefully before using the meter. [. . . ] · Press Continue or ESC to skip the message and enter titrator main screen. · Press Purge to begin a purge cycle. PURGE Purging should be performed: · whenever the tube of the peristaltic pump is replaced; · whenever the titrant is changed or a new bottle of titrant is used; · before starting a pump calibration; · before starting a lot of titrations. In order to start purging press the Purge key from the titrator main screen. The purging stops automatically after 5 minutes. To access the Purge key follow the next steps. · From the instrument main screen (pH meter screen) press "Titrator" function key. The purging stops automatically after 5 minutes. To stop purging at any time and return to the main screen press ESC or Stop. During a purge, a countdown timer displays remaining time in 5 minute purge. · Press Pause to interrupt the purge process. · Press Pause or Stop (by pressing the corresponding function key in the purge screen) · after the first drops of fresh titrant appear at the dosing tip · in case an error condition is observed (empty titrant bottle, tubes or dosing tip disconnected, pump error) · if you want to resume at a later time If Pause is pressed the next screen is displayed: The instrument will display the next screen if tutorial is enabled and if any of the following conditions exist: - the meter hasn't been calibrated in 8. 30 pH buffer - the pH calibration has expired - a pump calibration hasn't been performed or more than 3 days have passed since the last pump calibration 24 Press Resume to continue purging. 25 After the 5 minutes purging interval has elapsed the "Completed" message is displayed. Another purge period can be initiated by pressing Restart or press Esc to return to main titrator screen. Note: The chemical reagents may be hazardous if improperly handled. Read Health and Safety Data Sheets before performing the test. · From the titrator main screen press CAL. PUMP CALIBRATION PROCEDURE Please set up the instrument before performing the pump calibration. · Select the acidity type in SETUP menu to correspond with expected sample: U NI T m g/L m eq/L Low Range (50 m L sam ple) 15. 0 to 500. 0 0. 3 to 10. 0 High Range (50 m L sam ple) 400 to 4000 8 to 80 The instrument displays the date and time of the last electrode calibration, and the date and time of the last pump calibration, or calibration expired messages. The calibration of the pump must be performed each time the pump tube, the reagent bottle or the pH electrode is changed. It is recommended to perform the pump calibration before each set of titrations. Verify: The electrode has been calibrated in 8. 30 pH buffer. · Sample preparation: Precisely measure the amount of HI 84430-55 Pump Calibration Solution as indicated below and add to a clean beaker: Low Range (Strong LR, Total LR) - 2 ml High Range (Strong HR, Total HR) -20 ml Fill the beaker up to the 50 mL mark with the distilled or deionized water. Place the stir bar into the beaker and then place the beaker in the appropriate place on the instrument top. Place the electrode holder on the top of the beaker and secure it by turning clockwise. Immerse the pH electrode approximatively 2 cm (0. 8") into the standard paying attention not to touch the stir bar. Insert the temperature probe into the dedicated guide tube. Verify if the titrant correspondes to selected titration range. [. . . ] If under warranty, report the model number, date of purchase, serial number and the nature of the failure. If the repair is not covered by the warranty, you will be notified of the charges incurred. If the instrument is to be returned to Hanna Instruments, first obtain a Returned Goods Authorization Number from the Customer Service Department and then send it with shipment costs prepaid. When shipping any instrument, make sure it is properly packaged for complete protection. [. . . ]