Hanna-instruments HI 255 Bedienungsanleitung

1Instruction ManualHI 255MultiparameterpH/mV/ºCEC/TDS/NaClBench Meterwww.hannainst.com

10 If LOCK was pressed to freeze the LCD range and the reading went out ofrange, the full-scale value of the frozen range will be displayed blinking.

11 If the reading is out of range, the full-scale value (100.0 for Mtc/Atc modeor 400.0 for actual TDS) will be displayed blinking. If LOCK was pres

12pH CALIBRATIONCalibrate the instrument frequently, especially if high accuracy is required.The instrument should be recalibrated : Whenever the pH

13 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

14Note:  If the value measured by the instrument is notclose to the selected buffer, WRONG 2BUFand WRONG   tags will blink alternately.In th

15RELATIVE mV CALIBRATION Press CAL when the instrument is in RELATIVE mV measurement mode.The mV and   tags will blink. Absolute mV is displayed

16EC/TDS CALIBRATIONEC calibration is a one-point procedure. Selectable calibration points are 0.00 µSfor offset and 84.0 µS, 1413 µS, 5.00 mS, 12.88

17• If the meter is in Atc mode and the buffer temperature is out of0.0  60.0 ºC interval, WRONG ºC tags and the temperaturewill be displayed bli

18NaCl CALIBRATIONNaCl calibration is a one-point procedure at 100.0% NaCl. Use the HI7037Lcalibration solution (sea water solution) as a 100% NaCl s

19GOOD LABORATORY PRACTICE (GLP)GLP is a set of functions that allows storage and retrieval of data regarding themaintenance and status of the electro

2TABLE OF CONTENTSWARRANTY ... 2PRELIM

20 The pH calibration slope(the GLP slope is the average of the calibrationslopes; the percentage is referred to the ideal value of 59.16 mV/pH). Th

21LAST Relative mV CALIBRATION DATALast Relative mV calibration data is stored automatically after a successfulcalibration.To view the Relative mV cal

22 The Relative mV calibration offset: The instrument ID.LAST EC CALIBRATION DATALast EC calibration data is stored automatically after a successfu

23 The reference temperature. The temperature coefficient. The temperature compensation mode. The instrument ID.LAST NaCl CALIBRATION DATALast NaC

24 The cell constant. The reference temperature. The temperature compensation mode. The instrument ID.Note:  If notc is selected as temperature c

25LOGGING FUNCTIONUp to 200 LOG samples can be stored into memory.LOGGING THE CURRENT DATATo store the current reading into memory press LOG while the

26On Relative mV range:On EC range:On TDS range:On NaCl range:Otherwise, the instrument will display the memorized data: If RCL is invoked while the

27Or if RCL is invoked while the instrument is in NaCl measurement range:Pressing the ARROW keys, the instrument will display the same parameterbut fo

28 The calibration offset on the primary LCD and OFS message on thesecondary LCD. The calibration slope on the primary LCD and SLP message on th

29 The dEL message as described above.For EC Range The temperature value, time and date as described on pH Range. The offset factor on the primar

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

30For TDS Range The temperature reading as described in pH range (page 27). The conductivity value on the primary LCD and the record number on these

31SETUPSetup mode allows viewing and modifying the instrument parameters.In according with the selected range, SETUP menu allows the possibility tovie

32SET COMMON PARAMETERSInstrument ID parameterPress CAL when the instrument ID is displayed. The instrument ID (0000 to9999) will start blinking.Press

33Press RANGE. The month will start blinking.Press the ARROW keys to change the month.Press RANGE. The day will start blinking.Press the ARROW keys to

34SPECIFIC RANGE PARAMETERpH RangeCalibration Alarm Time-Out SetPress CAL when the calibration time-out is displayed. Calibration time-out(OFF or 1 to

35TDS Factor SetPress CAL when the TDS factor is displayed. The TDS factor will startblinking.Press the ARROW keys to change the TDS factor (0.40 to 0

36The instrument has two temperature channels: one that measures the tem-perature from the HI 7662 probe while the instrument is in pH/mV range andthe

37 Immerse the temperature probe (or EC probe) in the second vessel as nearas possible to the calibrated thermometer. Allow a few seconds for theprob

38 mV CALIBRATION(for technical personnel only)All the instruments are factory calibrated for mV.Hannas ORP electrodes are interchangeable and no mV

39Data transmission from the instrument to the PC can be done with theHI 92000 Windows® compatible software (optional). HI 92000 also offersgraphing

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

40 n=1 pH range/0.1 resolution n=2 mV range n=3 Relative mV range n=4 EC range n=5 TDS range n=6 NaCl rangeThe instrument sends the ACK (6) ch

41The temperature has an effect on pH. The calibration buffer solutions areaffected by temperature changes to a lesser degree than normal solutions.Du

42CONDUCTIVITY VERSUSTEMPERATURE CHARTThe conductivity of an aqueous solution is a measure of its ability to carry anelectrical current by means of io

43PREPARATION PROCEDURERemove the protective cap of the pH electrode.DO NOT BE ALARMED IF SALT DEPOSITS ARE PRESENT. This is normal withelectrodes. Th

44For 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

45pH ELECTRODE CLEANING PROCEDURE General Soak in Hanna HI 7061 or HI 8061 GeneralCleaning Solution for approximately ½ hour. Protein Soak in Hanna

46TROUBLESHOOTING GUIDESMOTPMYS MELBORP NOITULOStfirdevissecxe/esnoperwolS.Hpgnirusaem.edortceleHpytriD IHnipitedortceleehtkaoSrofnoitulos1608IHro1607

47Typical Electrode LifeAmbient Temperature 1  3 years90 ºC Less than 4 months120 ºC Less than 1 monthAlkaline ErrorHigh concentrations of sodium ion

48pH 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,

49ORP PRETREATMENT SOLUTIONSHI7091L Reducing Pretreatment Solution, 460 mLHI7092L Oxidizing Pretreatment Solution, 460 mLCONDUCTIVITY SOLUTIONSHI70

5HI 255SPECIFICATIONSEGNARHp00.61ot00.2Hp000.61ot000.2Vm9.996±Vm0002±99.92ot00.0µ mc/S9.992ot0.03µ mc/S9992ot003µ mc/Smc/Sm99.92ot00.3mc/Sm0.002ot0.

50HI 70442M* 1500 ppm (mg/L), 230 mLHI 70442L* 1500 ppm (mg/L), 460 mL* 4-4-2 solution with approx. 0.65 ppm = 1 µS/cm conversion rate.pH ELECTRODES

51HI1330BGlass-body, semimicro, single junction, refillable, combination pH electrode.Use: laboratory, vials.HI1331BGlass-body, semimicro, single ju

52120 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&

53Kynar® is registered Trademark of Pennwalt Corp.Ultem® is registered Trademark of General Electric Co.HI1413BGlass-body, single junction, flat

54EXTENSION 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

55RECOMMENDATIONS FOR USERSBefore using this product, make sure that it is entirely suitable for theenvironment in which it is used.Operation of this

56MAN25509/04R1SALES AND TECHNICAL SERVICE CONTACTSAustralia:Tel. (03) 9769.0666  Fax (03) 9769.0699China:Tel. (10) 88570068  Fax (10) 88570060Egypt

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7OPERATIONAL GUIDEPOWER CONNECTIONPlug the 12 VDC adapter into the power supply socket.Note: This instrument uses non volatile memory to retain the ca

8 The pH is displayed on the primary LCD and the temperature on thesecondary LCD. If the reading is out of range, the closest full-scale value will

9 The instrument displays the mV reading on the primary LCD and thetemperature on the secondary LCD line. If the reading is out of range, the closes