Hanna-instruments HI 21 Series Manuel d'utilisateur

HI 21 & HI 22 SeriesWall-mounted,Microprocessor-basedpH and ORP ControllersInstruction Manual

1918P.I.D. CONTROL MODE (HI 21523 ONLY)PID control is designed to eliminate the cycling associatedwith ON/OFF control in a rapid and steady way by mea

2120In HI 21 and HI 22 the proportional action is set directly as“Deviation” in pH and mV units respectively. Relation be-tween Deviation (D) and PB i

2322FS•O = NC (Normally Closed)De-energized RelayCOMFS•C = NO (Normally Open)Energized RelayALARM RELAY The alarm relay functions in the follo

2524IDLE MODEDuring idle mode the device performs the same tasks as whenit is in control mode except for the relays. The alarm relay isactivated (no a

2726These values can be changed by the user to have the analogoutput matching a different pH range, for example, 4 mA =3.00 pH and 20 mA = 5.00 pH.To

2928CONNECTIONSThe connections for the 4-pin RS485 terminal provided (#1on page 7) are as follows:The instrument has no internal line termination. To

3130Command Parameter DescriptionCAR null Request calibration dataGET NN Request setup item NNK01 null Same as CFM+ +CAL keysK02 null Same as LCD+CAL

3332Note The controller answers to the GET command with the samedata format explained in the SET command.Following are examples of answers:1) “03<

3534CALIBRATIONThe controller is factory calibrated for mV and temperatureinputs as well as for the analog outputs.The user should periodically calib

3736• Remove the protective cap from thepH electrode and immerse it into theselected buffer solution (e.g. pH 7.01)with the Potential Matching Pin an

32TABLE OF CONTENTSPRELIMINARY EXAMINATION . . . . . . . . . . . . . . . . . . 4GENERAL DESCRIPTION . . . . . . . . . . . . . . . . . . . . . 4FUNCT

3938Three-point Calibration• Proceed as described above but donot quit calibration by pressing CAL.Note The meter will automatically skip the two buff

4140PH BUFFER SELECTION (HI 21523 ONLY)A one point pH calibration at a value different from standardbuffer is possible by directly entering the desire

4342mV INPUT CALIBRATIONThe pH/mV controller is factory calibrated for the mV andtemperature inputs. However, the user may also perform amV calibratio

4544• Use a Checktemp or another calibrated thermometer witha resolution of 0.1° as a reference thermometer.• Immerse the temperature probe inthe beak

4746• Press CFM to confirm the parameter that stops blinking onthe primary display. The secondary display shows the mul-timeter or HI 931002 input val

4948Note In any moment, by pressing LCD or CAL DATA the meter willreturn to the regular operating display.• Press  or  to view the time of last ca

5150START-UPAt start-up the firmware release code scrolls through the LCD;it is possible to escape from code scrolling pressing any key.During the aut

5352The error detection for dead loops is performed by watchdog(see below).You can use special setup codes, perform selftest proceduresfor LCD, keyboa

5554RELAYS AND LEDSRelays and LEDs selftests are executed as follows:First all of the relays and LEDs are switched off, then they areswitched on one a

5756ELECTRODE CONDITIONING AND MAINTENANCE* Only available with refillable electrodes. For industrial applications, gel-filled electrodes are preferab

54• Temperature compensation of the pH reading (for HI 21series only).• Manual temperature setting when the temperature probe isnot inserted or temper

5958For refillable electrodes**: Refill the electrode with fresh electrolyte (HI 7071 for singlejunction or HI 7082 for double junction electrodes). A

6160TAKING REDOX MEASUREMENTSRedox measurements allow the quantification of the oxidizingor reducing power of a solution, and are commonly expressedin

6362ACCESSORIESpH CALIBRATION SOLUTIONSHI 7004M pH 4.01 buffer solution, 230 mL bottleHI 7004L pH 4.01 buffer solution, 500 mL bottleHI 7004/L pH 4.01

6564PLATINUM ORP ELECTRODESHI 3090T Screw connector, external PG13.5 thread, double junction,Pt, glass body, polymer filledHI 3210T Screw connector, e

6766ORP ELECTRODES½‘’ thread, double PVDF junction, polymer filled, max operating pressure of 6 bar (87psi)PLATINUM ELECTRODESPart Code Matching Pin A

6968WARRANTYAll Hanna Instruments meters are guaranteed for twoyears against defects in workmanship and materials whenused for their intended purpose

70HANNA LITERATUREHanna publishes a wide range of catalogs and handbooksfor an equally wide range of applications. The reference lit-erature currently

72MAN21R2 08/05TECHNICAL SERVICE CONTACTSAustralia: Tel. (03) 9769.0666 • Fax (03) 9769.0699China: Tel. (10) 88570068 • Fax (10) 88570060Egypt: Te

76MECHANICAL DIMENSIONSFRONT VIEW BOTTOM VIEWCONNECTIONS PANEL1. 4-pin RS485 terminal (not for HI 21XY1 and HI 22XY1)2. Analog output (not for HI 21XY

98INSTALLATIONHI 21 and HI 22 offera multitude of possibili-ties, from single anddual setpoints to ON/OFF, proportional orPID dosage, isolatedoutputs

1110SETUP MODEHI 21 and HI 22 offer a multitude of possibilities from ON/OFF, proportional or PID dosage to analog recorder outputand from alarm to se

1312• After confirmation, the selected param-eter is displayed. The user can scrollthrough the parameters by pressing CFM.In order to directly set ano

1514Code Valid Values Default PW60 Current day 01 to 31 from RTC no61 Current month 01 to 12 from RTC no62 Current year 1997 to 9999 from RTC no63 Cu

1716CONTROL MODEThe control mode is the normal operational mode for thesemeters. During control mode HI 21 and HI 22 fulfill thefollowing main tasks:•