Hanna-instruments HI 250 Manual do Utilizador Página 1

1Instruction ManualHI 250 HI 251Microprocessor-BasedpH/mV/ºCBench Meterswww.hannainst.com

10pH CALIBRATIONCalibrate the instrument frequently, especially if high accuracy is required.The instrument should be recalibrated : Whenever the pH

11 The   tag will blink on the LCD until the reading isstable. When the reading is stable and close to the selected buffer,READY tag will be dis

12Note:  If the value measured by the instruments is not close to theselected buffer, WRONG BUF and WRONG   tags willblink alternately. In t

13GOOD LABORATORY PRACTICE (GLP)GLP is a set of functions that allows storage and retrieval of data regarding themaintenance and status of the electro

14 The calibration buffers in calibrating order.The first pH calibration buffer:The second pH calibration buffer:The third pH calibration buffer:Note

15LOGGING FUNCTIONUp to 50 LOG samples can be stored into memory.LOGGING THE CURRENT DATATo store the current reading into memory press LOG while the

16VIEW LOGGED DATAPress RCL while in measurement mode to retrive the stored information.If no data were logged, the instruments display:Otherwise, the

17LOGDATELOG mV The date on the primary LCD, along with DATE tag. The calibration offset on the primary LCD and OFS message on thesecondary LC

18SETUPSetup mode allows viewing and modifying the following parameters: Current Time Current Date pH Resolution Beep Status Baud Rate (serial co

19CURRENT DATE SETPress CAL when the current date is displayed. The year will start blinking.Press the ARROW keys to change the year.Press RANGE. The

2TABLE OF CONTENTSWARRANTY ... 2PRELIM

20Press the ARROW keys to change the beep status (On or OFF).Press CFM to save the modified beep status.Press CAL to escape without saving.BAUD RATE S

21INSTRUMENT ID PARAMETER SETPress CAL when the instrument ID is displayed. The instrument ID (0000 to9999) will start blinking.Press the ARROW keys t

22 Immerse the temperature probe in the second vessel as near as possible tothe reference thermometer. Allow a few seconds for the probe to stabilize

23 Use the ARROW keys to set the reading on the secondary LCD to that ofthe hot water. When the reading is stable and close to the selectedcalibrati

24RELATIVE mV CALIBRATION (HI 251)Note:  If the reading is not close to the selected calibration point,WRONG tag will blink. Verify calibration con

25Data transmission from the instrument to the PC can be done with the HI92000 Windows® compatible software (optional). HI 92000 also offersgraphing a

26CHR n Change the instrument range according with the parametervalue (n): n=1 pH range/0.01 resolution n=2 pH range/0.1 resolution n=3 mV range (H

27The temperature has an effect on pH. The calibration buffer solutions areaffected by temperature changes to a lesser degree than normal solutions.Du

28PREPARATION PROCEDURERemove the protective cap of the pH electrode.DO NOT BE ALARMED IF SALT DEPOSITS ARE PRESENT. This is normal withelectrodes. Th

29For refillable electrodes:If the filling solution (electrolyte) is more than 2½ cm (1) below the fill hole,add HI 7082 or HI 8082 3.5M KCl Electrol

3PRELIMINARY EXAMINATIONRemove the instrument from the packing material and examine it carefully tomake sure that no damage has occurred during shippi

30CLEANING PROCEDURE General Soak in Hanna HI 7061 or HI 8061 GeneralCleaning Solution for approximately ½ hour. Protein Soak in Hanna HI 7073 or HI

31TROUBLESHOOTING GUIDESMOTPMYS MELBORP NOITULOSevissecxe/esnoperwolS.tfird.edortceleHpytriD nipitedortceleehtkaoS1608IHro1607IHsetunim03rofnoituloseh

32Typical Electrode LifeAmbient Temperature 1  3 years90 ºC Less than 4 months120 ºC Less than 1 monthAlkaline ErrorHigh concentrations of sodium ion

33pH BUFFER SOLUTIONSHI70004P pH 4.01 Buffer Sachets, 20 mL, 25 pcsHI70007P pH 7.01 Buffer Sachets, 20 mL, 25 pcsHI70010P pH 10.01 Buffer Sachets,

34ORP PRETREATMENT SOLUTIONSHI7091L Reducing Pretreatment Solution, 460 mLHI7092L Oxidizing Pretreatment Solution, 460 mLpH ELECTRODESAll electrodes

35HI1330BGlass-body, semimicro, single junction, refillable, combination pH electrode.Use: laboratory, vials.HI1331BGlass-body, semimicro, single ju

36120 mm4.7"12 mm0.5"FC 10075 mm2.95"6 mm0.25"FC 200120 mm4.7"12 mm0.5"FC 210120 mm4.7"12 mm0.5"9.5mm DIA0.37&

37Kynar® is registered Trademark of Pennwalt Corp.Ultem® is registered Trademark of General Electric Co.HI1413BGlass-body, single junction, flat

38EXTENSION CABLE FOR SCREW-TYPE ELECTRODES(SCREW TO BNC ADAPTER)HI 7855/1 Extension cable 1 m (3.3') longHI 7855/3 Extension cable 3 m (9.9&ap

39RECOMMENDATIONS FOR USERSBefore using these products, make sure they are entirely suitable for theenvironment in which they are used.Operation of th

41) Liquid Crystal Display (LCD).2) CFM/GLP key, to confirm different values or to display Good LaboratoryPractice information.3) CAL key, to enter an

40MAN25010/04SALES AND TECHNICAL SERVICE CONTACTSAustralia:Tel. (03) 9769.0666  Fax (03) 9769.0699China:Tel. (10) 88570068  Fax (10) 88570060Egypt:T

5HI 250SPECIFICATIONSEGNARHp0.61ot0.2Hp00.61ot00.2Cº0.021ot9.9NOITULOSERHp1.0Hp10.0Cº1.0YCARUCCAF°86/C°[email protected]±Hp10.0±Cº4.0±)rorreeborpgnidulcxe(e

6HI 251SPECIFICATIONSEGNARHp0.61ot0.2Hp00.61ot00.2Vm9.996±Vm0002±Cº0.021ot9.9NOITULOSERHp1.0Hp10.0)Vm9.996±(Vm1.0)Vm0002±(Vm1Cº1.0YCARUCCAF°86/C°02

7OPERATIONAL GUIDEPOWER CONNECTIONPlug the 12 VDC adapter into the power supply socket.Note: These instruments use non volatile memory to retain the p

8If measurements are taken successively in different samples, it is recommendedto rinse the electrode thoroughly with deionized water or tap water and

9RELATIVE mV MEASUREMENTS (HI 251 only) Press RANGE until rEL message will be displayed on the secondary LCDline for about one second and mV tag