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For refillable electrodes**: Refill the electrode with fresh electrolyte (

HI7071

for single

junction or

HI7082

for double junction electrodes). Allow

the electrode to stand upright for 1 hour. Follow the Storage
Procedure above.

CLEANING PROCEDURE

General

Soak in Hanna Instruments

HI7061

general

cleaning solution for approx. 30 minutes.

Removal of films, dirt or deposits on the membrane/junction:

Protein

Soak in Hanna Instruments

HI7073

protein

cleaning solution for 15 minutes.

Inorganic

Soak in Hanna Instruments

HI7074

inorganic

cleaning solution for 15 minutes.

Oil/grease

Rinse with Hanna Instruments

HI7077

Oil &

Fat cleaning solution.

IMPORTANT

After performing any of the cleaning procedures rinse the
electrode thoroughly with distilled water, drain and refill the
reference chamber with fresh electrolyte, (not necessary for
gel-filled electrodes) and soak the electrode in

HI70300

storage solution for at least 1 hour before reinstalling it.

TROUBLESHOOTING

Evaluate your electrode performance based on the fol-
lowing.
• Noise (Readings fluctuate up and down) could be due to:

- Clogged/Dirty Junction: Refer to the Cleaning Proce-

dure above.

- Loss of shielding due to low electrolyte level (in refillable

electrodes only): refill with

HI7071

for single junction

HI7082

for double junction electrodes.

• Dry Membrane/Junction: Soak in storage solution

HI 70300

for at least 1 hour. Check to make sure the

installation is such as to create a well for the electrode
bulb to constantly remain moist.

• Drifting: Soak the electrode tip in warm Hanna Instru-

ments Solution

HI7082

for one hour and rinse tip with

distilled water (refill with fresh

HI7071

for single junction

electrodes and

HI7082

for double junction electrodes if

necessary).

• Low Slope: Refer to the cleaning procedure above.

Содержание HI 21 Series

Страница 1: ...HI21 HI22 Series Wall mounted Microprocessor based pH and ORP Controllers Instruction Manual...

Страница 2: ...nts are in compliance with the directives MODELS The models HI21XYZ are pH controllers while the models HI22XYZ are ORP controllers HI21111 pH Controller with single setpoint ON OFF control analog out...

Страница 3: ...SETUP MODE 11 CONTROL MODE 17 IDLE MODE 25 ANALOG OUTPUT 26 RS485 COMMUNICATION DATA LOGGING 28 CALIBRATION 35 LAST CALIBRATION DATA 48 START UP 51 FAULT CONDITIONS AND SELFTEST PROCEDURES 52 pH VALUE...

Страница 4: ...of a case inside which the signal conversion circuitry the microprocessor circuitry and the output power drivers are contained MAIN FEATURES OF DIFFERENT MODELS Display large LCD with 4 13 mm digits...

Страница 5: ...n points and correspondent pH values for HI21 series only or calibration date and time and the mV calibration points used for HI22 series only Input pH electrode with BNC connector 5 Vdc output for am...

Страница 6: ...de 6 key increases the blinking digit letter by one when selecting a parameter Advances forward while in last calibration data viewing mode Increases the temperature setting when temperature probe is...

Страница 7: ...ching Pin 6 Connection for electrode reference 7 Power supply input 1 Potential Earth 2 Neutral 3 Line 8 Alarm terminal 1 F S Closed 2 COM 3 F S Open 9 Relay 1 first dosing terminal not for HI21523 1...

Страница 8: ...er Supply Input 5V for amplified electrodes Power Supply 1 models 115 10 Vac 50 60 Hz 2 models 230 10 Vac 50 60 Hz Power Consumption 15 VA Over Current Protection 450 mA 250V FAST FUSE Relay 1 and 2 E...

Страница 9: ...r outputs in mAmps and Volts In addition HI21 and HI22 are both equipped with the exclusive differen tial input In a system with poor grounding it is possible to have a ground cur rent flowing through...

Страница 10: ...by connecting the Connection for Potential Matching Pin 5 page 7 with the Connection for Electrode Reference 6 on page 7 with a jumper wire Pt 100 Terminals these contacts 3 at page 7 connect the Pt 1...

Страница 11: ...s or flags which can activate special tasks when set and confirmed Each setup parameter or setup item is assigned a two digit setup code which is entered and displayed on the secondary LCD The setup c...

Страница 12: ...the parameter you want to set using the arrow keys as per the password procedure above e g 41 Confirm the code by pressing CFM and the default or the previously memorized value will be displayed with...

Страница 13: ...2 Control enable disable 0 C M disabled 1 C M enabled 0 no 11 Relay 1 mode M1 for HI21523 only 0 disabled 1 ON OFF high setpoint 2 ON OFF low setpoint 3 PID high setpoint 4 PID low setpoint 0 disabled...

Страница 14: ...d 1 to 30 min not for HI21523 5 s to 30 min HI21523 only 5 min 30 s no no 33 Maximum relay ON time 1 to 60 min HI21523 only 10 to 9999 min not for HI21523 after which an alarm mode is entered 60 60 no...

Страница 15: ...00 to 9999 0000 yes Note The process controller automatically checks to ensure that the entered data matches other related variables If a wrong configuration is entered WRONG blinks on the LCD to prom...

Страница 16: ...sing LCD and CAL DATA at the same time when the pH controller is in normal operating mode idle or control with measurement displaying Note When a wrong setup value is con firmed the pH controller does...

Страница 17: ...n also from PC The status of the meter is shown by the LED s on the right STATUS LEDs Control Alarm Alarm LED green Relay LED yellow Red LED OFF ON OFF ON ON OFF ON ON or OFF OFF ON ON OFF ON or OFF B...

Страница 18: ...losed terminals The ON relay state occurs when relay is energized NO and COM connected NC and COM disconnected The OFF relay state occurs when relay is de energized NO and COM disconnected NC and COM...

Страница 19: ...lates the relay activation time at certain moments t0 t0 Tc t0 2Tc etc The ON interval the shaded areas is then dependent to the error amplitude With the integral function reset the controller will re...

Страница 20: ...is as follows Kp Ki s s Kd Kp 1 1 s Ti s Td with Ti Kp Ki Td Kd Kp where the first term represents the proportional action the second is the integrative action and the third is the deriva tive action...

Страница 21: ...plied to get the best possible control for the particular process The target is to achieve a fast response time and a small overshoot Many tuning procedures are available and can be applied to HI21 A...

Страница 22: ...ntersection with the horizontal line corresponding to the initial pH or mV value Read the system time delay Tx on the time axis 4 The deviation Ti and Td can be calculated from the fol lowing Deviatio...

Страница 23: ...rolled value has overtaken one alarm threshold This additional feature will avoid fake or temporary alarm conditions Note If the power supply is interrupted the relay is de energized as if in alarm co...

Страница 24: ...m will warn the user when pH goes over the alarm thresholds the power breaks down and in case of a broken wire between the process meter and the external alarm circuit Note In order to have the Fail S...

Страница 25: ...emains activated When the instrument is in idle mode the red and green status LEDs are on Idle mode is useful to disable control actions when the external devices are not installed or when the user de...

Страница 26: ...configura tion for example 0 20 mA and 4 20 mA is achieved via software by entering the setup mode and selecting code 40 see Setup Mode section for exact procedure Factory default is jumpers 1 and 3...

Страница 27: ...minimum and maximum are 41 or 42 respectively For the exact procedure refer to the setup mode section in the manual Note The difference between maximum and minimum values for the analog output must be...

Страница 28: ...sible for you to use the powerful means of the most diffused spreadsheet programs Excel Lotus 1 2 3 etc Simply run your favorite spread sheet and open the file downloaded by HI92500 It is then possibl...

Страница 29: ...at both ends of the line Up 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 interferences use shielded or twi...

Страница 30: ...485 port is optoisolated from measuring circuit and power line If both analog output and RS485 port are pres ent they have the same ground RS485 PROTOCOL The commands sent to the controller must have...

Страница 31: ...UP key KUP null Same as key MDR null Request firmware code MVR null Request mV reading HI22 only available in control or idle mode only PHR null Request pH reading HI21 only available in control or id...

Страница 32: ...a mV controller identified by the process ID number 03 to the 1200 mV value 2 01 SET 33 015 CR This command sets the setup item 33 max relay ON time of a controller identified by the process ID numbe...

Страница 33: ...ceived character and first character of the answer is 15 ms The time out for the complete controller answer to the PHR MVR and TMR commands is 30 ms at 9600 bps 40 ms at 4800 bps 60 ms at 2400 bps 90...

Страница 34: ...ring e g 7 01 Buf 2 ASCII string e g 4 01 Buf 3 ASCII string e g 10 01 HI22 1 Date Time Buf1 Buf2 Date DDMMYY e g 170400 for April 17 2000 Time HHMM e g 1623 for 4 23 pm Buf 1 ASCII string e g 7 01 Bu...

Страница 35: ...method chosen simply exit the calibration mode by pressing CAL when the desired number of points has been calibrated The calibration points for HI21 are pH4 01 pH7 01 and pH10 01 at 25 C The sequence...

Страница 36: ...stop and the primary LCD will display the pH value using the current offset and slope with the CAL and indicators lit and the probe indicator blinking The value displayed on the secondary LCD is the...

Страница 37: ...ference 6 on page 7 with a jumper wire Only when the reading is stable the probe indicator will stop flashing after about 30 seconds and the CFM indicator will start blinking Press CFM to confirm the...

Страница 38: ...10 01 buffer for alkaline samples Note The electrode should be submerged ap proximately 4 cm 1 in the solution The temperature probe should be located as close as possible to the pH electrode Select t...

Страница 39: ...possible to the pH electrode Only when the reading is stable the probe indicator will stop flashing after about 30 seconds and the CFM indicator will start blinking Press CFM to confirm the calibrati...

Страница 40: ...D When a one point calibration is carried out only the pH offset is computed and stored while the pH slope is fixed according to the theoretical values With a two point calibration offset and slope ar...

Страница 41: ...P and the pH value on the secondary LCD will start blinking By the and keys select the pH calibration value of the buffer Immerse the electrodes in the buffer solution When the reading is stable press...

Страница 42: ...link on the LCD The LCD will then show the default slope for Hanna Instruments elec trodes 57 5 mV pH Note If CAL DATA or LCD are pressed before CFM calibration is aborted without changing the data of...

Страница 43: ...ure With HI21 the meter will ask for the calibration procedure code number The following table lists the possible values of the input code and calibration points One of the points must be 0 1900 mV ca...

Страница 44: ...After that proceed as described above Note A measure is considered stable when it varies little within a sequence of acquisitions The number of acquisitions is fixed so that the waiting time for blink...

Страница 45: ...Use or to select code 1 for the temperature calibration and press CFM to enter CAL will blink on the LCD until the meter confirms a steady reading When the reading has stabilized at a point near the...

Страница 46: ...may also perform these calibration procedures IMPORTANT It is recommended to perform the output calibration at least once a year Calibration should only be performed after a few minutes from power up...

Страница 47: ...s are obtained press CFM and the meter will skip back to normal operating mode Note When adjusting values using the or it is important to allow for sufficient response time up to 30 seconds The table...

Страница 48: ...e time offset first slope buffer 1 value For the HI22 last calibration data includes date and time of calibration and the values of the 2 calibration points Displaying of these items follows the above...

Страница 49: ...The secondary display will show OFF to indicate offset Press or again to view the first slope in mV at the time of last calibration The secondary display will show SL1 to indicate first slope Press o...

Страница 50: ...condary display will show BUF2 to indicate second buffer Press or again to view the third memorized buffer at the time of last calibration The secondary display will show BUF3 to indicate third buffer...

Страница 51: ...red otherwise user is asked whether the EEPROM should be reset If EEPROM reset is requested default values from ROM are stored into EEPROM as would happen with a new EEPROM Note that EEPROM data is co...

Страница 52: ...to reset EEPROM directly without a previous EE PROM error detection This is done by pressing CFM first and then SETUP and CAL DATA simultaneously Note When an EEPROM reset has been per formed calibrat...

Страница 53: ...ghting up all of the display segments together The Display test is announced by a scrolling Display test message The segments are lit for a few seconds and then switched off before exiting the selftes...

Страница 54: ...r a few seconds before exiting selftest procedure If not the instrument will display the message Stored data error Press to reset stored data or to ignore If is pressed the EEPROM selftest procedure t...

Страница 55: ...indicated by the scrolling message by pressing a key Note Relays and LEDs test has to be carried out with the relay contacts disconnected from external plant devices WATCHDOG When a dead loop conditio...

Страница 56: ...w pH4 01 7 01 or 10 01 at pH4 7 or 10 buf fers respectively At 20 C the display should show pH4 00 7 03 or 10 06 The meter reading at 50 C will then be 4 06 6 98 or 9 82 TEMP pH VALUES C F 4 01 7 01 1...

Страница 57: ...ON Remove the protective cap DO NOT BE ALARMED IF ANY SALT DEPOSITS ARE PRES ENT This is normal with electrodes and they will disappear when rinsed with water During transport tiny bubbles of air may...

Страница 58: ...taking your measurements STORAGE To minimize clogging and assure a quick response time the glass bulb and the junction should be kept moist and not allowed to dry out This can be achieved by installi...

Страница 59: ...r with fresh electrolyte not necessary for gel filled electrodes and soak the electrode in HI70300 storage solution for at least 1 hour before reinstalling it TROUBLESHOOTING Evaluate your electrode p...

Страница 60: ...minutes rinse thoroughly in distilled water and then follow the Cleaning Procedure above For ORP Electrodes polish the metal tip with a lightly abrasive paper paying attention not to scratch the sur f...

Страница 61: ...s preferred for the measurements of oxidizing solutions containing halides and for general use When a platinum electrode is immersed in an oxidizing solution a monomolecular layer of oxygen is develop...

Страница 62: ...per functioning of the ORP electrode Therefore immerse it into HI7021 and measure the response the obtained value should be within 240 20 mV After this functional test it is suggested to wash the elec...

Страница 63: ...L bottle HI7092M Oxidizing pretreatment solution 230 mL bottle HI7092L Oxidizing pretreatment solution 500 mL bottle ELECTRODE MAINTENANCE SOLUTIONS HI70300M Storage solution 230 mL bottle HI70300L St...

Страница 64: ...junction HI1211T Plastic body cloth junction HI 1210T PVDF junction polymer filled HI1211T HI2910B 5 BNC connector 5 m 16 5 cable double junction plastic HI2911B 5 body with built in amplifier and ex...

Страница 65: ...ternal PG13 5 thread double junction Pt plastic body PVDF junction polymer filled HI2930B 5 BNC connector 5 m 16 5 cable double junction Pt plastic body with built in amplifier and external thread clo...

Страница 66: ...ead ELECTRODES FOR HIGH PRESSURE APPLICATIONS pH ELECTRODES thread double PVDF junction polymer filled max operating pressure of 6 bar 87 psi In addition to the electrode connector there is also a spa...

Страница 67: ...for the matching pin Part Code Matching Pin Amplifier Connector Cable HI2002 3 NO NO BNC 3 m 10 HI2002 5 NO NO BNC 5 m 16 5 HI2003 3 YES NO BNC 3 m 10 HI2003 5 YES NO BNC 5 m 16 5 HI2004 5 YES YES spa...

Страница 68: ...rsible electrode holders HI6054 HI 6057 Electrode holders for in line applications HI778P Screened coaxial cable with screw connectors HI7871 HI7873 Level controllers HI8427 pH ORP electrode simulator...

Страница 69: ...contact your local Hanna Instruments Office If under warranty report the model number date of pur chase serial number and the nature of the failure If the repair is not covered by the warranty you wi...

Страница 70: ...equipment the recommended cables noted in the user s manual must be used Any variation introduced by the user to the supplied equipment may degrade the instruments EMC performance To avoid electrical...

Страница 71: ...y covers areas such as Water Treatment Process Swimming Pools Agriculture Food Laboratory Thermometry and many others New reference material is constantly being added to the library For these and othe...

Страница 72: ...2942 Japan Tel 03 3258 9565 Fax 03 3258 9567 Korea Tel 02 2278 5147 Fax 02 2264 1729 Malaysia Tel 603 5638 9940 Fax 603 5638 9829 Singapore Tel 6296 7118 Fax 6291 6906 South Africa Tel 011 615 6076 F...

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