Hanna-instruments HI 8711 Manual do Utilizador Página 1

1www.hannainst.comPanel MountedpH and ORPIndicators andControllersHI 8510 • HI 8512HI 8710 • HI 8711HI 8720Instruction Manual

10DOSAGE MODE SWITCH Blinks when the dosing switch is in OFF or ONposition.SWITCHOFF/AUTO/ON To set the dosing mode:• OFF - dosing is disabled• AUTO -

111. BNC socket for pH electrode2. Input from amplified electrode3. Connections for Pt100 temperature sensor4. Connections for dosing pump5. Reduc/Oxi

12ΔALARM To display and set the alarm tolerancepH 7 TEST To verify Offset compensationpH 4 TEST To verify amplifier circuitNote: Each time a key is pr

13TrimmersSLOPE For Slope calibrationOFFSET For Offset calibrationΔALARM To set the tolerance of the alarmALK. SETCOARSE To coarsely adjust alkaline s

141. BNC socket for pH electrode2. Input from amplified electrode3. Connections for Pt100 temperature sensor4. Connections for dosing pump for acid5.

15KeypadSET To set the working point of ORP dosageMEASURE To enter measurement mode and to enablediagnostic testsΔALARM To display and set the alarm t

16TrimmersCAL For ORP calibrationΔALARM To display and set the alarm toleranceSET/COARSE To coarsely adjust the setpointSET/FINE To finely adjust the

171. BNC socket for ORP electrode2. Input from amplified electrode3. Oxid/Reduc dosage consent terminals4. Connections for dosing pump5. Alarm contact

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2PRELIMINARY EXAMINATION ... 3GENERAL DESCRIPTION ...

20HI 8720TUPNIedortcelErettimsnarTEGNAR Vm0001±NOITULOSER Vm1YCARUCCA)C°86/C°02@(Vm5±%5.0±STUPNI01ecnadepmihgiH21;mhOerastupniniPgnihctaMdnaecnerefeRe

21••••• Connect a 3-wire cable to the power supplyterminal according to the voltage level asindicated, and pay particular attention tothe correct line

22••••• The HI 8710 models are single dosagecontrollers with acid/alkaline selection.If acid dosage is needed (e.g. in chromiumVI reduction), leave o

23••••• CONSENT contacts (HI 8710 and HI 8720,see picture, terminals 3 and 4): these contacts(max. 2A, 240V) are used for reduction andoxidation react

24All instrument settings are made via front panel keys and trimmers.When a key is pressed, the corresponding LED lights up to show theoperating funct

25SET POINTS (HI 8711)To set the working point for alkaline dosage, press the ALK. SET key andthe display will show the set value for alkaline dosage.

26Examples:For HI 8710, if the set value is pH 3 and the ΔALARM is 1.5 pH, theinstrument generates an alarm every time the pH reading is higherthan 4.

27When acid dosage is active, the ACID LED lightsup, while during alkaline dosage, the ALK. LEDturns on (HI 8710 only).When oxidant dosage is active,

28Make sure that the instrument is in measurementmode (MEASURE LED is on) before proceedingwith calibration.Measure the temperature of the calibration

29Rinse pH electrode and the reference thermometer thoroughly with pH4.01 rinsing solution, then immerse them in pH 4.01 (HI 7004) or pH10.01 (HI 7010

3Remove the instrument from the packing material and examine itcarefully to make sure that no damage has occurred during shipping.If there is any noti

30Temperature has an effect on the pH. The calibration buffer solutionsare affected by temperature changes to a lesser degree than normalsolutions.Ple

31HI 8510, HI 8710 and HI 8711 are provided with autodiagnosticfunctions that allow to check and troubleshoot any malfunctioning.The functions are mad

32C)Amplifier Circuit TestPress the pH 4 TEST key and the display should show a valuewithin the 3.30 to 4.30 pH range, to verify the amplifier circuit

33HI 8512 and HI 8720 are ORP controllers provided with autodiagnosticfunctions that allow to check and troubleshoot any malfunctioning.The functions

34All LEDs above the keys indicate the state of each function, whether itis active or the display is indicating the mode.For HI 8711 onlyEach LED can

35Redox measurements allow the quantification of the solution oxidizing/reducing power, and are commonly expressed in mV.Oxidation may be defined as t

36Oxidizing pre-treatment: immerse the electrode for some minutes inHI 7092 solution.If no pre-treatment is performed, the electrode will have long re

37PREPARATION PROCEDURERemove the protective cap.DO NOT BE ALARMED IF ANY SALT DEPOSITS ARE PRESENT. This isnormal with electrodes and they will disap

38PERIODIC MAINTENANCEInspect electrode and cable. The cable used for the connection to themeter must be intact and there must be no points of broken

39CLEANING PROCEDURE• General Soak in HI 7061 general cleaning solution forapproximately 1 hour.Removal of films, dirt or deposits on the membran

4The meters are provided with a black anodized aluminum body,front and back panels in shockproof ABS plastic and a transparentsplash-proof front cover

40SHORT DISTANCE, INDOOR INSTALLATIONDue to the low current involved, a very high grade of insulation isrequired.A dry environment is needed in order

41AmpHel® is a registered Trademark of "Hanna Instruments"LONG DISTANCE INSTALLATIONS, ISOLATED OUTPUT FOR PC INTERFACEIf the needed install

42pH CALIBRATION SOLUTIONSHI 7004M pH 4.01 buffer solution, 230 mLHI 7004L pH 4.01 buffer solution, 500 mLHI 7006M pH 6.86 buffer solution, 230 mLHI 7

43pH ELECTRODESHI 1090T Screwcap PG13.5 connector, double junction, glassbodyHI 1110S Screw connector, single junction, glass bodyHI 1130B/3 BNC conne

44HI 1210T Screwcap PG13.5 connector, double junction, plas-tic bodyHI 1910B BNC connector, 1 m (3.3') cable, double junction,plastic body, built

45ORP ELECTRODESHI 2930B/5 BNC connector, 5 m (16.5') cable, Pt, plastic body,built-in amplifierHI 3110S Screw connector, Pt, glass bodyHI 3130B

46OTHER ACCESSORIESHI 98501ChecktempC thermometer with penetration probeand 0.1°C resolution (-50.0 to 150.0°C)HI 8614 pH transmitter (0.00 to 14.00

47HANNA instruments reserves the right to modify the design, construction andappearance of its products without advance notice.HI 778P Coaxial cable a

48Printed in Romania, EU MAN8711 09/09Hanna Instruments Inc.Highland Industrial Park584 Park East DriveWoonsocket, RI 02895 USALocal Sales and Custom

5FRONT PANELKeypadSENSOR TEST To display the mV reading of the electrode and,therefore, verify its working conditionpH 7 TEST To verify the internal c

6Unplug the instrument from the power supply before replacing the fuse.Only one of BNC, AMP INPUT or INPUT TRANSMITTER connectors can beused at a mome

7Keypad0 mV TEST To verify the instrument calibration at 0 mV1000 mV TEST To verify the slope at 1000 mVNote: Each time a key is pressed the correspon

81. BNC socket for ORP electrode2. Input from amplified electrode3. Power supply terminals4. Fuse holder5. Recorder output terminals6. Connection to t

9KeypadSET To set the pH dosage limitMEASURE To enter measurement mode and to enablediagnostic testsSENSOR TEST To display electrode mV reading and ve