Hanna Instruments HI 255 Скачать руководство пользователя страница 10

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LOCK

was pressed to freeze the LCD range and the reading went out of

range, the full-scale value of the frozen range will be displayed blinking.

The EC reading is affected by temperature.

Three options of compensating temperature are available, on EC measurement

mode.

Note

: The compensation is referenced at the selected reference temperature

(see SETUP for details, page 31).

Automatic (Atc)

: The EC probe has a built-in temperature sensor; the

temperature value is used to automatically compensate the EC/TDS reading

(from 0.0 60.0 ºC).

Manual (Mtc)

: The temperature value, shown on the secondary LCD, can be

manually set with the

ARROW

keys. The ºC tag blinks when this option is active.

No Compensation (notc)

: The temperature

value is displayed, but is not taken into account

and ºC tag blinks with a higher frequency.

The reading displayed on the primary LCD is the

actual EC or TDS value. To select the desired

option, press the

ALT&ATC

keys until the option

is displayed on the LCD.

Note:

•

The default compensation mode is

Atc

•

If no temperature probe detected,

Atc

mode can not be selected

and the instrument displays ---- on the secondary LCD.

If temperature compensation is active, measurements are compensated using the

temperature coefficient (default value 1.90 %/ºC). To change the temperature

coefficient, enter the setup mode and select the tc item (see SETUP for details,

page 31). The current temperature coefficient can be quickly viewed by pressing

the

ALT&TC

keys. The value is briefly displayed on the secondary LCD.

If the temperature reading is out of 0.0 60.0 ºC interval and

Atc

option is

selected, the ºC tag will blink and the closest interval limit will be displayed.

Press the

ARROW

keys to change the displayed temperature value. This

value is used to compensate the EC/TDS reading.

TDS MEASUREMENTS

Press the

ALT&MODE

keys while in EC range. The instrument will switch to TDS

measuring range. A TDS reading will be displayed on the primary LCD and the

temperature reading on the secondary LCD.

ALT

ATC

Содержание HI 255

Страница 1: ...1 Instruction Manual HI 255 Multiparameter pH mV ºC EC TDS NaCl Bench Meter www hannainst com ...

Страница 2: ...of charge Damage due to accidents misuse tampering or lack of prescribed maintenance isnotcovered 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 not covered by the warranty you will be notified of the charges incurred If the instrument is to be r...

Страница 3: ... NaCl and Temperature bench meter Relative mV feature is also provided The pH measurements are compensated for temperature effect manually or automatically with the HI 7662 temperature probe pH Calibration is possible in up to three points using five memorized buffers 4 01 6 86 7 01 9 18 and 10 01 The autoranging feature of the EC and TDS ranges automatically sets the instrument to the scale with ...

Страница 4: ...y to switch measurement unit pH mV EC or focused data MODEkey alternatefunction toselectmeasurementmode pHresolution 10 ON OFFswitch 11 Powersupplysocket 12 Conductivitysocket 13 BNCelectrodeconnector 14 Electrodereferencesocket 15 Temperature probe socket 16 RS232serialcommunicationconnector FUNCTIONAL DESCRIPTION Front Panel Primary LCD Secondary LCD 1 9 3 2 7 4 6 5 10 8 11 13 14 15 Rear Panel 1...

Страница 5: ...t 0 0 E G N A R H p C º 0 0 2 1 o t 0 0 1 E G N A R C E C º 0 0 6 o t 0 0 N O I T U L O S E R H p 1 0 0 H p 1 0 0 0 V m 9 9 9 6 V m 1 0 V m 0 0 0 2 V m 1 1 0 0 µ m c S 1 0 µ m c S 1 µ m c S m c S m 1 0 0 m c S m 1 0 m p p 1 0 0 m p p 1 0 m p p 1 l g 1 0 0 l g 1 0 l C a N 1 0 C º 1 0 Y C A R U C C A F º 8 6 C º 0 2 H p 1 0 0 H p 2 0 0 0 V m 9 9 9 6 V m 2 0 V m 0 0 0 2 V m 1 5 0 0 g n i d a e r f o ...

Страница 6: ... 1 o t 0 0 1 E G N A R C E C º 0 0 6 o t 0 0 y t i v i t c u d n o c n o d e l b a s i d e b n a c y t i v i t c u d n o c l a u t c a e r u s a e m o t e g n a r e r u t a r e p m e t y t i v i t c u d n o C t n e i c i f f e o c C º 0 0 6 o t 0 0 0 y l n o S D T d n a C E r o f C º 0 9 1 s i e u l a v t l u a f e d r o t c a f S D T 0 8 0 o t 0 4 0 0 5 0 s i e u l a v t l u a f e d e d o r t c e...

Страница 7: ... temperature probe to the appropriate socket ForEC TDSmeasurementsconnecttheprobetothe7 pinconnector Makesure the probe sleeve is properly inserted INSTRUMENT START UP Turn the instrument on by pressing the ON OFF switch All LCD tags are displayed and a beep is sounded while the instrument performs a self test Note The instrument starts in the same range and mode as it was at poweroff The RANGE ke...

Страница 8: ...s possible to the electrode and wait for a few seconds If the temperature of the sample is known manual compensation can be performed by disconnecting the temperature probe Thedisplaywillthenshowthedefaulttemperatureof25 ºCor the last temperature reading with the ºC tag blinking The temperature can now be adjusted with the ARROW keys from 10 0 ºC to 120 0 ºC mV ORP MEASUREMENTS An optional ORP ele...

Страница 9: ...trument is equal to the difference between the current mV input value and relative mV offset established in the relative mV calibration CONDUCTIVITY MEASUREMENTS Connect the conductivity probe to the instrument Press RANGE to enter conductivity measurement range EC Immerse the probe into the solution to be tested The sleeve holes must be completely submerged Tap the probe repeatedly to remove any ...

Страница 10: ...select the desired option press the ALT ATCkeys until the option is displayed on the LCD Note The default compensation mode is Atc If no temperature probe detected Atc mode can not be selected and the instrument displays on the secondary LCD Iftemperaturecompensationisactive measurementsarecompensatedusingthe temperature coefficient default value 1 90 ºC To change the temperature coefficient enter...

Страница 11: ...ate socket Immerse the temperature probe into the sample and allow the reading on the secondary LCD to stabilize For EC TDS NaCl range the HI76310 probe has a built in temperature sensor Note If the instrument is in pH ORP range and the HI7662 temperature probeisnotconnected the ºC tagwillblink manualcompensation evenifECprobeisconnected AUTORANGING TheECandTDSscalesareautoranging Themeterautomati...

Страница 12: ...ng in the acidic range use pH 7 01or 6 86 as first buffer and pH 4 01 as second buffer If you are measuring in the alkaline range use pH 7 01 or 6 86 as first buffer and pH 10 01 or 9 18 as second buffer PROCEDURE Calibration has a choice of 5 memorized buffers pH 4 01 6 86 7 01 9 18 and 10 01 It is recommended to perform a two or three point calibration However the instrument also allows a one po...

Страница 13: ...tag will blink on the LCD until the reading is stable Whenthereadingisstableandclosetotheselectedbuffer READY tagwillbedisplayedand CFM tagwillblink Press CFM to confirm calibration The calibrated value will be displayed on the primary LCD and the third expected buffer value on the secondary LCD line Note The instrument will automatically skip the buffer used for the first and second calibration p...

Страница 14: ...nd temperature value are displayed blinking if temperature reading is out of the defined temperature range of the buffer Calibration cannot be confirmed in this situation Press RANGE to display the temperature reading on the LCD during calibration TWO POINT CALIBRATION Proceed as described in Three point calibration section Press CAL after the second calibration point was confirmed The instrument ...

Страница 15: ...window 2000mV the instrument asks for confirmation Ifthereadingisoutoftheoffsetwindow WRONG tagwillbedisplayed Press CFM to confirm absolute value The instrument will display 0 0 mV on the primary LCD and rEL message on the secondary LCD line In this moment the relative mV offset is equal to absolute mV reading Use the ARROW keys if you want to change the displayed value Press CFMtoconfirmrelative...

Страница 16: ...This calibration is performed in order to correct the reading around 0 00 µS point The slope is evaluated when the calibration is performed in any other point The BUF and CAL tags are displayed The primary LCD will display the EC reading The secondary LCD will display the buffer value The and tags will blink Select the desired value with the ARROW keys if necessary When the reading is stable READY...

Страница 17: ...ayed blinking ForbestresultschooseanECbuffervalueclosetothesampletobe measured In order to minimize any EMC interference use plastic or glass beakers Itispossibletosetthecellconstantvaluedirectly withoutfollowing the calibration procedure To set the cell constant enter SETUP mode and select CEL see SETUP for details page 31 WRONG CAL ...

Страница 18: ... will display the NaCl reading in percentage The secondary LCD will display 100 The and tags will blink When the reading is stable the READY tag will be displayed and CFM tag starts blinking on the LCD asking for confirmation Press CFM to confirm calibration The instrument stores the calibration value and returns to measurement mode Note If the reading is too far from the expected value WRONG tags...

Страница 19: ...isabled Theinstrumentchecksifthetime 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 is disabled in SETUP menu LAST pH CALIBRATION DATA ThelastpHcalibrationdataisstoredautomaticallyafterasuccessfulcalibration ToviewthepHcalibrationdata press GLPwhentheinstrumentisinpH mV ...

Страница 20: ...essagedisplayedbesidethepHvaluemeansthatthis buffer was not used during last calibration Press and hold down theALT SETkeysifyouwanttoseecalibrationdate ortimeifold calibration was made in the same day with current calibration If nobUF messageappearsontheLCD theinstrumentinforms you that calibration was performed in less than three points Temperature compensation mode Atc or Mtc with or without te...

Страница 21: ...ument is in Relative mV measurement mode The instrument will display the time hh mm of the last calibration Press the ARROW keys to view the next logged calibration parameter pressing the key The date yy mm dd INTV CAL TIME CAL DATE CAL Calibration Alarm Time Out status if disabled or the number of days until the calibration alarm will be displayed or if expired 7 days ago The instrument ID ...

Страница 22: ...after a successful calibration To view the EC calibration data press GLP when the instrument is in EC measurement mode The instrument will display The time Press the ARROW key to view the next logged calibration parameters pressing the key The date The EC calibration buffer The cell constant The calibration offset factor DATE CAL ...

Страница 23: ... DATA LastNaClcalibrationdataisstoredautomaticallyafterasuccessfulcalibration To view the NaCl calibration data press GLP when the instrument is in NaCl measurement mode The instrument will display The time Press the ARROW key to view the next logged calibration parameters pressing the key The date Thesalinitycoefficient DATE CAL ...

Страница 24: ... notc is selected as temperature compensation mode during calibration the temperature coefficient is not displayed in GLP Press GLP at any moment and the instrument will return to measurement mode If calibration has not been performed on the selected range the instrument displays no CAL message blinking CAL ...

Страница 25: ...s 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 and no more data will be saved When LOG is pressed a complete set of information of the corresponding mea surement range is stored VIEW LOGGED DATA Press the ALT RCL keys while in measurement mode to retrieve the stored information If no data...

Страница 26: ...he memorized data If RCLisinvokedwhiletheinstrumentisinpHormVmeasurementrange Or if RCL is invoked while the instrument is in Rel mV range Or if RCL is invoked while the instrument is in EC measurement range Or if RCL is invoked while the instrument is in TDS measurement range LOG mV LOG LOG LOG pH LOG ...

Страница 27: ...cordsfromothermeasure ment ranges Press RANGE and the instrument will display the next logged parameter as follows For pH mV Range The temperature value on the primary LCD and the record number on the secondary LCD ThemVvalueontheprimaryLCDandtherecordnumberonthesecondaryLCD Note When the pH mV or temperature is displayed if the ALT SET keys are pressed and hold down the secondary LCD will display...

Страница 28: ...ed and hold down the secondary LCD will display the record number The dEL message on the primary LCD and the selected record on the secondary LCD with LOG tag displayed and CFM tag blinking Note If one of the ARROW keys is pressed while dEL and record number is displayed the next previous record number is selected If the ALT SET keys are pressed the secondary LCD will display ALL message The time ...

Страница 29: ...bed on pH Range The cellconstant on the primary LCD and CEL message on the secondary LCDline Note When the EC or temperature is displayed if the ALT SET keys are pressed and hold down the secondary LCD will display the record date Pressing the ALT SET keys again the secondary LCD will display the record number Press CFM to confirm deletion If dEL ALL option was selected all records for all ranges ...

Страница 30: ...conductivity value as described in TDS Range The time and date as described in pH Range The salinityfactor on the primary LCD and cF message on the secondary LCD with LOG and NaCl tags displayed The reference temperature the temperature compensation mode the cell constant and dEL message as described above Note After LOG is pressed or dEL is confirmed the instrument will display the amount of free...

Страница 31: ...larm Time Out In EC TDS NaCl Range CellConstant TDS Factor TemperatureCoefficient ReferenceTemperature To enter SETUP mode press the ALT SET keys while the instrument is in measurement mode The instrument will display the first parameter of the specificrange Select a parameter with the ARROW keys Press CAL if you want to change a parameter value The selected parameter will start blinking Press RAN...

Страница 32: ... is downloaded to a PC as part of a logged data set to identify its origin Current Time Set Press CAL when the current time is displayed The hour will start blinking Press the ARROW keys to change the hour Press RANGE The minutes will start blinking Press the ARROW keys to change the minutes Press CFM to save the modified value Press CAL to escape without saving Current Date Set Press CAL when the...

Страница 33: ...or OFF Press CFM to save the modified beep status Press CAL to escape without saving Note If enabled an audible signal will follow each key pressed Inactive keyshavealongerbeep Alongerbeepcanbealsoheardwhenthe range limits of a parameter are reached During calibration an audible signal can be heard when the reading becomes stable Baud Rate Set Press CAL when the baud rate is displayed The baud rat...

Страница 34: ...l constant is displayed The cell constant will start blinking Press the ARROW keys to change the cell constant 0 500 to 1 700 Press CFM to save the modified cell constant Press CAL to escape without saving Serial Communication Command Prefix Set Press CAL when the command prefix is displayed Command prefix 0 to 47 will start blinking Press the ARROW keys to change the command prefix Press CFM to s...

Страница 35: ...ure compensation coefficient will start blinking Press the ARROW keys to change the temperature compensation coefficient 0 00 to 6 00 ºC Press CFM to save the modified temperature compensation coefficient Press CAL to escape without saving Reference Temperature Parameter Set Press CAL when the reference temperature is displayed The reference temperature will start blinking Press the ARROW keys to ...

Страница 36: ...changes Use a calibrated thermometer with a resolution of 0 1 ºC as a reference thermometer Connectthe HI7662probetotheappropriatesocketforthe pH temperature channel or the HI 76310 probe for the EC temperature channel With the instrument off press and hold down the CAL ALT keys then power on the instrument to calibrate the pH temperature channel or CAL and keys and then power on the instrument to...

Страница 37: ...the reading on the secondary LCD to that of the hot water When the reading is stable and close to the 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 point WRONG tag will blink Change the temperature probe or EC probe and restart calibration ...

Страница 38: ...able and close to the selected 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 selected calibration point READY tag will appear and CFM tag will blink Press CFM to confirm The secondary LCD will display 1800 mV Set 1800 0 mV on the simulator When the r...

Страница 39: ...ANDS 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 the terminal program and set the communication options as follows 8 N 1 no flowcontrol COMMAND TYPES To send a command to the instrument the scheme is commandprefix command CR where command prefix is a selectable ASCII character between 0 and 47 ...

Страница 40: ...ctivity and temperature reading on EC range TDS and temperature reading on TDS range NaCl and temperature reading on NaCl range MDR Requests the instrument model name and firmware code PAR Requests the setup parameters setting NSL Requests the number of logged samples GLP Requests the calibration data record LODxxx Requests the xxxth record logged data Err3 sent when xxx is an invalid record numbe...

Страница 41: ...1 0 4 6 8 6 1 0 7 8 1 9 1 0 0 1 0 2 3 1 0 4 8 9 6 3 1 7 6 4 9 2 3 0 1 5 1 4 0 0 4 5 9 6 0 1 7 9 3 9 4 2 0 1 0 1 0 5 0 0 4 2 9 6 7 0 7 3 3 9 8 1 0 1 5 1 9 5 0 0 4 0 9 6 4 0 7 7 2 9 2 1 0 1 0 2 8 6 0 0 4 8 8 6 3 0 7 2 2 9 6 0 0 1 5 2 7 7 1 0 4 6 8 6 1 0 7 8 1 9 1 0 0 1 0 3 6 8 2 0 4 5 8 6 0 0 7 4 1 9 6 9 9 5 3 5 9 3 0 4 4 8 6 9 9 6 0 1 9 2 9 9 0 4 4 0 1 4 0 4 4 8 6 8 9 6 7 0 9 8 9 9 5 4 3 1 1 5 0 4 ...

Страница 42: ... 1 3 0 1 0 5 0 3 3 9 0 2 0 1 7 6 0 0 6 9 5 0 0 2 3 8 5 1 6 3 5 1 9 5 0 8 4 0 1 7 4 1 1 8 6 0 0 4 5 6 0 0 5 2 9 3 6 0 4 6 1 8 0 6 0 2 7 0 1 3 7 1 1 0 7 0 0 2 7 6 0 0 4 4 9 5 5 1 4 7 1 6 2 6 0 5 9 0 1 9 9 1 1 1 7 0 0 5 8 6 0 0 3 6 9 5 4 2 4 8 1 4 4 6 0 9 1 1 1 5 2 2 1 3 7 0 0 8 9 6 0 0 2 8 9 7 3 3 4 9 1 2 6 6 0 3 4 1 1 1 5 2 1 4 7 0 0 3 1 7 0 0 2 0 0 1 9 2 4 4 0 2 8 6 0 7 6 1 1 8 7 2 1 6 7 0 0 4 2 7...

Страница 43: ...n rinsed with water During 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 thermometer Ifthebulband orjunctionisdry soaktheelectrodein HI70300 orHI80300 Storage Solution for at least one hour ELECTRODE CONDITIONING MAINTENANCE ...

Страница 44: ...nimize clogging and assure a quick response time the glass bulb and the junction of pH electrode should 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 for single junction and HI 7082 or HI 8082 for double junction electrodes Follow the Preparation Pro...

Страница 45: ...roughly with distilled water refill the reference chamber with freshelectrolyte notnecessaryforgel filledelectrodes andsoaktheelectrode in HI 70300 or HI 80300 Storage Solution for at least 1 hour before taking measurements EC Probe Maintenance Rinse the probe with clean water after measurements If a more thorough cleaning is required remove the probe sleeve and clean the probe with a cloth or a n...

Страница 46: ...r b i l a c e R e l p m a s H p e h t e r u s e k a M b e g n a r d e i f i c e p s e h t n i s i l e v e l e t y l o r t c e l e e h t k c e h C c e h t f o e t a t s l a r e n e g e h t d n a e d o r t c e l e V m s w o h s y a l p s i d e h t f I 0 0 0 2 r o 0 0 0 2 d n a g n i k n i l b V m e h t n i e g n a r f o t u O e l a c s d e t c e n n o c t o n e d o r t c e l E C E s w o h s y a l p ...

Страница 47: ... 0 29 0 40 The resistance of glass electrodes partially depends on the temperature The lower the temperature the higher the resistance It takes more time for the reading to stabilize if the resistance is higher In addition the response time will suffer to a greater degree at temperatures below 25 ºC SincetheresistanceofthepHelectrodeisintherangeof50 200Mohm the current across the membrane is in th...

Страница 48: ...0 mL CLEANINGSOLUTIONS HI 7061M General Cleaning Solution 230 mL bottle HI 7061L General Cleaning Solution 460 mL bottle HI 8061M General Cleaning Solution 230 mL bottle FDA approved bottle HI 8061L General Cleaning Solution 460 mL bottle FDA approved bottle HI 70000P Electrode Rinse Sachets 20 mL 25 pcs HI 7073L Protein Cleaning Solution 460 mL HI 7074L Inorganic Cleaning Solution 460 mL HI 7077L...

Страница 49: ...e HI 7034L 80000 µS cm µmho cm 460 mL bottle HI 7035L 111800 µS cm µmho cm 460 mL bottle HI 7039L 5000 µS cm µmho cm 460 mL bottle HI 7037L 100 NaCl sea water standard solution 460 mL bottle HI 8030L 12880 µS cm µmho cm 460 mL FDA approved bottle HI 8031L 1413 µS cm µmho cm 460 mL FDA approved bottle HI 8033L 84 µS cm µmho cm 460 mL FDA approved bottle HI 8034L 80000 µS cm µmho cm 460 mL FDA appro...

Страница 50: ...alkali HI 1053B Glass body tripleceramic conicshape refillable combinationpHelectrode Use emulsions HI 1083B Glass body micro Viscolene non refillable combination pHelectrode Use biotechnology micro titration HI 1131B Glass body single junction refillable combination pHelectrode Use general purpose 120 mm 4 7 12 mm 0 5 9 5mm DIA 0 37 HI 1040 S VERSION HI 1043 120 mm 4 7 12 mm 0 5 HI 1050 S VERSION...

Страница 51: ...e Use general field HI 2031B 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 0 2 5mm DIA 0 2 HI 1310 S VERSION HI 1330 120 mm 4 7 12 mm 0 5 HI 1210 S VERSION HI 1230 75 mm 2 95 6 mm 0 25 HI 2020 S VERSION HI 2031 120 mm 4 7 12 mm 0 5 HI 1312 S VERSION ...

Страница 52: ...od industry FC 200B Plastic body Kynar 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 220B Glass body triple ceramic single junction refillable combination pH electrode Use foodprocessing FC 911B Plastic body Kynar double junction refillable with built...

Страница 53: ...nation platinum ORP electrode 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 purpose ConsulttheHannaGeneralCatalogformoreelectrodeswithscrew typeor BNCconnectors 110 mm 4 3 12 mm 0 5 HI 1413 150 mm 5 9 12 mm 0 5 HI 3111 S VERSION HI 3131 120 mm 4 7 12 mm 0 5...

Страница 54: ...DC Australiaplug ChecktempC Pocket size thermometer range 50 0 to 150 0 ºC 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 and ORP electrode simulator with LCD and 1 m 3 3 coaxial cable ending in female BNC connectors HI 76310 Platinum4 ringconductivity TDSprobewithtemperaturesen sor and 1 m 3 3 cable HI 7662 T...

Страница 55: ...atic 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 electrostatic discharges Any variation introduced by the user to the supplied equipment may degrade the instrument s EMC performance To avoid electrical shock do not use this instrument when voltages at the measurement surface exceed 24 VAC or 60...

Страница 56: ...2942 Japan Tel 03 3258 9565 Fax 03 3258 9567 Korea Tel 02 2278 5147 Fax 02 2264 1729 Malaysia Tel 603 5638 9940 Fax 603 5638 9829 Singapore Tel 6296 7118 Fax 6291 6906 SouthAfrica Tel 011 615 6076 Fax 011 615 8582 Taiwan Tel 886 2 2739 3014 Fax 886 2 2739 2983 Thailand Tel 2 619 0285 Fax 2 619 0284 UnitedKingdom Tel 01525 850 855 Fax 01525 853 668 USA Tel 401 765 7500 Fax 401 765 7575 For e mail c...

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