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Instruction Manual

HI 254

Microprocessor-Based

pH/mV/ºC

Bench Meter

w w w. h a n n a i n s t . c o m

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Summary of Contents for HI 254

Page 1: ...1 Instruction Manual HI 254 Microprocessor Based pH mV C Bench Meter www hannainst com All manuals and user guides at all guides com a l l g u i d e s c o m...

Page 2: ...If service is required contact the dealer from whom you purchased the instrument If under warranty report the model number date of purchase serial number and the nature of the problem If the repair is...

Page 3: ...lied accessories The HANNA HI 254 is a logging microprocessor based pH and temperature bench meter HI 254 can also measure Oxidation Reduction Potential ORP in mV range Relative mV feature is also pro...

Page 4: ...witch 11 Powersupplysocket 12 BNCelectrodeconnector 13 Electrodereferencesocket 14 Temperature probe socket 15 RS232serialcommunicationconnector FUNCTIONAL DESCRIPTION Front Panel Primary LCD Secondar...

Page 5: ...i l a C H p n o i t a r b i l a c t n i o p 5 r o 4 3 2 1 e l b a l i a v a s r e f f u b 7 8 1 9 1 0 7 6 8 6 1 0 4 8 6 1 5 4 2 1 1 0 0 1 e r u t a r e p m e T n o i t a s n e p m o c m o r f c i t a...

Page 6: ...ture compensation connect the temperature probe to the appropriate socket INSTRUMENT START UP TurntheinstrumentonbypressingtheON OFFswitch All LCD tags are displayed and a beep is sounded while the in...

Page 7: ...ure of 25 C or the last temperature reading with the C tag blinking The temperature can now be adjusted with the ARROW keys from 9 9 Cto120 0 C mV ORP MEASUREMENTS An optional ORP electrode must be us...

Page 8: ...layed by the instrument is equal to the difference between the current mV input value and relative mV offset established in the relative mV calibration TEMPERATURE MEASUREMENTS Connect the HI7669 2W t...

Page 9: ...range use pH 7 01 or 6 86 as first buffer and pH4 01orpH1 68assecondbuffer Ifyouaremeasuringinthealkalinerange use pH 7 01 or 6 86 as first buffer and pH 10 01 or pH 12 45 as second buffer PROCEDURE C...

Page 10: ...rature probe approximately 4 cm 1 into the second buffer solution and stir gently The temperature probe should be close to the pH electrode If necessary press the ARROW keys to select a different buff...

Page 11: ...ferpH tagsand Old tagonthesecondaryLCD aredisplayedblinking aninconsistencybetweennewandprevious old calibration is detected Clear calibration parameters by pressing SET CLR and proceed with calibrati...

Page 12: ...trumentchecksifthetime outtimehasexpired Ifthetimeelapsed the CAL INTV tags will blink as a reminder Note If the instrument was not calibrated the CAL INTV tags will be displayed even if the feature i...

Page 13: ...as not used during last calibration Press and hold down SET CLR if you want to see calibration date or time if old calibration was made in the same day with current calibration If no bUF message appea...

Page 14: ...No 5 dated September 14 If there are less than 6 memory locations remaining the record number and Lo message will blink to alert the user If the log space is full FULL LOC message will be displayed an...

Page 15: ...y LCD along with LOG tag or Pressing the ARROW keys the instrument will display the same parameter but for a different record Press RANGE and the instrument will display the next logged parameter as f...

Page 16: ...or slope is displayed if SET CLR ispressedandholddown thesecondaryLCDwilldisplaytherecord number The dEL message on the primary LCD and the selected record on the secondary LCD along with LOG tag Note...

Page 17: ...n Calibration Alarm Time Out Instrument ID To enter SETUP mode press SET while the instrument is in measurement mode Select a parameter with the ARROW keys Press CAL if you want to change a parameter...

Page 18: ...ng Press the ARROW keys to change the month Press RANGE The day will start blinking Press the ARROW keys to change the day Press CFM to save the modified value Press CAL to escape without saving pH RE...

Page 19: ...ed baud rate value Press CAL to escape without saving SERIAL COMMUNICATION COMMAND PREFIX SET Press CAL when the command prefix is displayed The command prefix 0 to 47 will start blinking Press the AR...

Page 20: ...ET Press CAL when the instrument ID is displayed The instrument ID 0000 to 9999 will start blinking Press the ARROW keys to change the instrument ID value Press CFM to save the modified instrument ID...

Page 21: ...the instrument off press and hold down the CAL LOG keys then power on the instrument The CAL tag will appear and the secondary LCD will show 0 0 C Immerse the temperature probe in the vessel with ice...

Page 22: ...e selected calibration point READY tag will appear and CFM tag will blink Press CFM to confirm The instrument returns to measurement mode Note If the reading is not close to the selected calibration p...

Page 23: ...ed calibration point READY tag will appear and CFM tag will blink Press CFM to confirm The secondary LCD will display 600 mV Set 600 0 mV on the simulator When the reading is stable and close to the s...

Page 24: ...CFM to confirm the absolute value The instrument will display 0 0 mV on the primary LCD and rEL message on the secondary LCD In this moment the relative mV offset is equal to absolute mV reading Useth...

Page 25: ...easeseethefollowinginstructions SENDING COMMANDS FROM PC It is also possible to remotely control the instrument with any terminal program Use HI 920010 cable to connect the instrument to a PC start th...

Page 26: ...ings in according with the current range pH mV and temperature reading on pH range mV and temperature reading on mV range Rel mV absolute mV and temperature reading on Rel mV range MDR Requests the in...

Page 27: ...8 9 1 1 5 4 3 1 1 0 7 1 5 0 4 3 8 6 8 9 6 4 0 9 5 8 9 4 8 1 1 0 5 2 2 1 1 7 1 6 0 4 3 8 6 8 9 6 1 0 9 2 8 9 0 7 1 1 5 5 1 3 1 2 7 1 7 0 4 4 8 6 8 9 6 9 9 8 9 7 9 7 5 1 1 0 6 0 4 1 2 7 1 9 0 4 4 8 6 8...

Page 28: ...ng transport tiny bubbles of air may form inside the glass bulb affecting proper functioning of the electrode These bubbles can be removed by shaking down the electrode as you would do with a glass th...

Page 29: ...uld be kept moist and not allowed to dry out Replace the solution in the protective cap with a few drops of HI 70300 or HI 80300 Storage Solution or in its absence Filling Solution HI 7071 or HI 8071...

Page 30: ...ution for 15 minutes Oil grease Rinse with Hanna HI 7077 or HI 8077 Oil and Fat Cleaning Solution IMPORTANT After performing any of the cleaning procedures rinse the electrode thoroughly with distille...

Page 31: ...n a H p g n i k n i l b 0 0 6 1 H p e h t n i e g n a r f o t u O e l a c s r e t e m e h t e t a r b i l a c e R a H p e h t e r u s e k a M b d e i f i c e p s e h t n i s i e l p m a s e g n a r e...

Page 32: ...is higher In addition the response time will suffer to a greater degree at temperatures below 25 C SincetheresistanceofthepHelectrodeisintherangeof50 200Mohm the current across the membrane is in the...

Page 33: ...Solution 460 mL HI 80300L Storage Solution in FDA approved bottle 460 mL ELECTRODE CLEANINGSOLUTIONS HI 70000P Electrode Rinse Sachets 20 mL 25 pcs HI 7061L General Cleaning Solution 460 mL HI 7073L P...

Page 34: ...body tripleceramic conicshape refillable combinationpHelectrode Use emulsions HI 1083B Glass body micro Viscolene non refillable combinationpHelectrode Use biotechnology micro titration HI 1131B Glass...

Page 35: ...031B Glass body semimicro conic refillable combination pHelectrode Use semisolidproducts HI 1332B Plastic body Ultem doublejunction refillable combinationpHelectrode Use general purpose 120 mm 4 7 5mm...

Page 36: ...ar open junction conic Viscolene non refillable combination pH electrode Use meat cheese FC 210B Glass body doublejunction conic Viscolene non refillable combination pH electrode Use milk yogurt FC 22...

Page 37: ...trode Use titration HI 3230B Plastic body Ultem gel filled combination platinum ORP electrode Use general purpose HI 4430B Plastic body Ultem gel filled combination gold ORPelectrode Use general purpo...

Page 38: ...HI 710014 Voltage adapter from 230 VAC to 12 VDC Australiaplug HI 76405 Electrodeholder HI 8427 pH and ORP electrode simulator with 1 m 3 3 coaxial cable ending in female BNC connectors HI 931001 pH a...

Page 39: ...lectrode is sensitive to electrostatic discharges Avoid touching this glass bulb at all times During operation ESD wrist straps should be worn to avoid possible damage to the electrode by electrostati...

Page 40: ...40 MAN254 10 04 All manuals and user guides at all guides com...

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