Hanna-instruments HI 23 Manuel d'utilisateur

1HI 23 / HI 24 SeriesWall-mounted,Microprocessor-based,Conductivity and TDSProcess ControllersInstruction Manual

1918Code Valid Values Default PW71 Baud rate 1200, 2400, 4800, 9600 4800 yes72 Cleaning timer 0 to 19999 days 0 no73 Initial cleaning day 01 to 31 01

2120CONTROL MODEThe control mode is the normal operational mode for thesemeters. During control mode the meter fulfills the followingmain tasks:• conv

2322 The low setpoint relay may be used to control a low conduc-tivity dosing pump.P.I.D. CONTROL MODE (HI 23x2z and HI 24x2z models only)PID control

2524second is the integrative action and the third is the deriva-tive action.Proportional action can be set by means of the ProportionalBand (PB). Pro

27264. The deviation, Ti and Td can be calculated from the following:• Deviation = Tx * max. slope (EC/TDS)• Ti = Tx / 0.4 (minutes)• Td = Tx * 0.4 (m

2928Note In order to have the Fail Safe feature activated, an externalpower supply has to be connected to the alarm device.CONTROL THROUGH ANALOG OUTP

3130The type (voltage or current) and the range of the outputanalog signal is selectable through the jumpers on the board.Analog output options are as

3332To obtain accurate readings, use the calibration solution inthe selected range and closer to the values to be mea-sured.Offset Calibration• To per

3534CELL CONSTANT DIRECT SELECTIONWhenever the EC/TDS probe cell constant is known, it ispossible to directly calibrate the meter using that value.• P

3736Calibration procedure may be interrupted by pressing CALagain at any time. If the calibration procedure is stoppedthis way, or if the controller i

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

3938OUTPUT CALIBRATION CALIBRATION CALIBRATIONTYPE CODE POINT 1 POINT 20-1 mA 0 0 mA 1 mA0-20 mA 1 0 mA 20 mA4-20 mA 2 4 mA 20 mA0-5 VDC 3 0 VDC 5 VDC

4140• Press  or  to cycle through the data forward or back-wards respectively.Note In any moment, by pressing LCD or CAL DATA the meter willreturn

4342As soon as one or more keys are pressed, the appropriatesegments out of 88:88 corresponding to the pressed keys,will light up on the screen. The c

4544WATCHDOGWhen a dead loop condition is detected a reset is auto-matically invoked.The effectiveness of watchdog capability can be testedthrough one

4746Up to 32 units can be connected to the same RS485 line,with a total line length of up to 1.2 Km using 24AWG cable.To minimize electromagnetic inte

4948KDS null Same as LCD keyKDW null Same as keyKRG null Same as keyKST null Same as SETUP keyKUP null Same as keyMDR null Request firmware codeECR nu

5150The time-out for the first character of the controller answer is100 milliseconds.The minim delay between the last received character and firstchar

5352STARTUPDuring the automatic startup the Real Time Clock (RTC) ischecked to see if a reset occurred since last software initial-ization. In this ca

5554EC / TDS PROBE MAINTENANCEProbe can be compensated for normal contamination by aprocess of recalibration. When calibration can no longerbe achieve

5756OTHER ACCESSORIESHI 3011D 4-ring EC/TDS probe with standard 1/2’’ external thread forflow-thru mounting, DIN connector and 3 m (10’) cableHI 3012D

54MAIN FEATURES OF DIFFERENT MODELS• Display: large LCD with 4 ½ 13 mm digits and 3 ½ 7.7 mmdigits.• LEDs: four LEDs are provided for signaling the en

5958Recommendations for UsersBefore using these products, make sure that they are entirely suitable for theenvironment in which they are used.Operatio

60MANHI23R1 05/05TECHNICAL SERVICE CONTACTSAustralia: Tel. (03) 9769.0666 • Fax (03) 9769.0699China: Tel. (10) 88570068 • Fax (10) 88570060Egypt:

76FUNCTIONAL DESCRIPTION1. Liquid Crystal Display2. CAL DATA key last calibration data viewing (enters and exits)3. LCD key exits from setup and rever

98MECHANICAL DIMENSIONS1. RS 485 communications terminal (HI 23xy2 and HI 24xy2models only)2. Analog Output terminal (HI 23xy1 and HI 24xy1 models onl

1110INSTALLATIONHI 23 and HI 24 series offer a multitude of possibilities,from dual setpoints to ON/OFF or PID dosage, isolated out-puts with user-sel

1312If the Pt 100 has more than 2 wires, con-nect the two wires of one end to pins 9and 10 (pin 9 is an auxiliary input tocompensate for the cable res

1514The setup codes can be selectedafter password and CFM arepressed. When CFM is pressed,the current setup item is savedon EEPROM and the followingit

1716SETUP CODESThe following table lists the setup codes along with the descrip-tion of the specific setup items, their valid values and whetherpasswo