Instruction Manual HI 8424 Hanna Instruments Inc. Highland Industrial Park 584 Park East Drive Woonsocket, RI 02895 USA Portable pH/mV/°C Meter Technical Support for Customers Tel. (800) 426 6287 Fax (401) 765 7575 Local Sales and Customer Service Office Printed in EUROPE (ROMANIA) MAN8424W R2 09/10 w w w. h a n n a i n s t .
Dear Customer, Thank you for choosing a HANNA instruments® product. Please read this instruction manual carefully before using the instrument. This manual will provide you with the necessary information for correct use of the instrument, as well as a precise idea of its versatility. If you need additional technical information, do not hesitate to e-mail us at tech@hannainst.com or see the back cover for our worldwide contact list.
RECOMMENDATIONS FOR USERS Before using this product, make sure that it is entirely suitable for the environment in which it is used. Operation of this instrument 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. Avoid touching this glass bulb at all times.
FUNCTIONAL DESCRIPTION 1) 2) 3) 4) BNC connector for pH or ORP electrodes Liquid Crystal Display (LCD) RANGE key, to select pH, mV or temperature range Up Arrow key, to manually set the temperature value when no temperature probe is connected 5) CAL/SELECT key, to enter calibration mode or select menu options 6) CFM/SETUP key, to confirm data or enter/exit setup menu 7) Down Arrow key, to manually set the temperature value when no temperature probe is connected 8) HOLD key, to freeze the reading on displa
HI 4430B / HI 4410S Plastic body, gel-filled, combination gold ORP electrode. Use: general purpose. SPECIFICATIONS 12 mm 0.5" HI 4430 120 mm 4.7" "S" VERSION Consult the HANNA General Catalog for a complete and wide selection of electrodes. EXTENSION CABLES FOR SCREW-TYPE ELECTRODES (SCREW TO BNC CONNECTOR) HI 7855 SERIES CABLE CONNECTORS CONNECTOR AND 3.0 mm (0.
OPERATIONAL GUIDE INITIAL PREPARATION • Remove the electrode protective cap before taking any measurements. If the electrode has been left dry, soak the tip in HI 70300 storage solution for a few hours or overnight to reactivate it. • Connect the pH electrode to the BNC connector on the top of the instrument. • Connect the temperature probe to the RCA connector.
HI 1332B / HI 1312S Plastic body, double junction, refillable, combination pH electrode. Use: general purpose. 12 mm 0.5" HI 1332 "S" VERSION 120 mm 4.7" HI 2031B / HI 2020S Glass body, semimicro, conic, refillable, combination pH electrode. Use: semisolid products. 6 mm 0.25" HI 2031 TEMPERATURE COMPENSATION The meter is designed to compensate for temperature, as the response of the pH electrode is directly affected by temperature.
Notes: • To perform correct ORP measurements, the surface of the ORP electrode must be clean and smooth. • When not in use, the tip of the electrode should be kept moist (use HI 70300 storage solution) and safe from any mechanical stress which might cause damage to the glass/platinum junction. HI 1083B Glass body, micro, Viscolene, non-refillable, combination pH electrode. Use: biotechnology, micro titration. 12 mm 0.5" 5 mm 0.2" 3 mm 0.12" 3.0 mm DIA 0.12" HI 1083 120 mm 4.
HI 7082 HI 8082 HI 8093 3.5 M KCl electrolyte solution, 4 x 30 mL bottle, for double junction electrodes 3.
• When the buffer value is recognized and the reading is stable, an acoustic signal (if enabled) advises the user, the "pH" symbol stops flashing, the hourglass indicator disappears and the "CFM" tag starts blinking to indicate that the value can be confirmed. • Press CFM to store the first calibration point. • The meter expects a pH 4.01 or 10.01 buffer. • Rinse and immerse the pH electrode and the temperature probe in pH 4.01 or pH 10.01 buffer (2nd calibration point) and stir gently.
For refillable electrodes, if the refill solution (electrolyte) is more than 2.5 cm (1") below the fill hole, add the appropriate electrolyte solution. MEASUREMENT Rinse the electrode tip with distilled water, immerse it (4 cm / 1½") in the sample and stir gently for a few seconds. For a faster response and to avoid cross contamination of the samples, rinse the electrode tip with the solution to be tested, before taking any measurements.
MENU SELECTION ELECTRODE CONDITIONING & MAINTENANCE While in normal measurement mode, press and hold the CFM/SETUP key for about 5 seconds until the meter enters the menu selection mode. The following parameters can be set from the menu: 1. Auto-off feature: 20 minutes (default setting) or disabled; 2. Acoustic signal: enabled (default setting) or disabled; 3. Temperature unit: °C (default setting) or °F. When entering the menu mode, the auto-off selection is entered.
TROUBLESHOOTING m V CALIBRATION Symptom Slow reponse or excessive drift Problem Dirty pH electrode Reading fluctuates up and down (noise) Clogged/dirty junction or low electrolyte level (refillable electrodes) Blinking full scale value Blinking "°C" (or "°F") "WRONG" & blinking dashes Blinking battery symbol Meter shuts off "Clr" message "Er1" and Er2" messages Solution Soak the electrode tip in HI 7061 solution for 30 minutes Soak the electrode tip in warm HI 7082 solution for one hour, then rinse i
BATTERY REPLACEMENT LCD MESSAGES & TROUBLESHOOTING The meter displays the remaining battery percentage when turned on. When the level is below 5%, the battery symbol on the bottom left of the LCD blinks to indicate a low battery condition. If the battery level is low enough to cause erroneous readings, the Battery Error Prevention System (BEPS) turns the meter off.
