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Hanna Instruments pH 500 Series, Инструкция по эксплуатации

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51

50

• No Slope:

- Check the electrode for cracks in glass stem or bulb

(replace the electrode if cracks are found).

- Make sure cable and connections are not damaged nor

lying in a pool of water or solution.

• Slow Response/Excessive Drift: soak the tip in the 

HI 7061

solution for 30 minutes, rinse thoroughly in distilled water
and then follow the Cleaning Procedure above.

• For ORP Electrodes: polish the metal tip with a lightly abra-

sive paper (paying attention not to scratch the surface)
and wash thoroughly with water.

Note

With industrial applications, it is always recommended to
keep at least one spare electrode handy. When anomalies
are not resolved with a simple maintenance, change the
electrode (and recalibrate the controller) to see if the prob-
lem is alleviated.

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

HI 7071

 for single

junction or 

HI 7082

 for double junction electrodes). Allow

the electrode to stand upright for 1 hour. Follow the Stor-
age Procedure above.

CLEANING PROCEDURE

General

Soak in Hanna 

HI 7061

 general cleaning

solution for approximately 30 minutes.

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

Protein

Soak in Hanna 

HI 7073

 protein cleaning so-

lution for 15 minutes.

Inorganic

Soak in Hanna 

HI 7074

 inorganic cleaning

solution for 15 minutes.

Oil/grease

Rinse with Hanna 

HI 7077

 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 neces-
sary for gel-filled electrodes) and soak the electrode in

HI70300

 storage solution for at least one hour before rein-

stalling it.

TROUBLESHOOTING

Evaluate your electrode performance based on the following.

• Noise (Readings fluctuate up and down) could be due to:

- Clogged/Dirty Junction: refer to the Cleaning Procedure

above.

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

electrodes only): refill with 

HI 7071

 for single junction

or 

HI 7082

 for double junction electrodes.

• Dry Membrane/Junction: soak in 

HI 70300

 storage solu-

tion for at least 1 hour. Check to make sure the installation
is such as to create a well for the electrode bulb to con-
stantly remain moist.

• Drifting: soak the electrode tip in warm Hanna 

HI 7082

solution 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 pH 500 Series

Страница 1: ...pH 500 mV 600 Series Panel mounted Microprocessor based pH and ORP Controllers Instruction Manual ...

Страница 2: ...122 α α α α α pH controller with single setpoint proportional and ON OFF controls RS232 output pH 500211 α α α α α pH controller with dual setpoint ON OFF control analog output pH 500212 α α α α α pH controller with dual setpoint ON OFF control RS232 output pH 500221 α α α α α pH controller with dual setpoint proportional and ON OFF controls analog output pH 500222 α α α α α pH controller with dua...

Страница 3: ...til you are sure that the instru ment functions correctly Any damaged or defective items must be returned in their original packing materials together with the supplied accessories GENERAL DESCRIPTION The product is a real time microprocessor based pH ORP controller It provides accurate measurements flexible ON OFF or proportional control capabilities and dual alarm signals The system is composed ...

Страница 4: ...es with the measure ment on the display In pH 500 series during pH calibration alternately displays pH buffer value or current temperature 3 SETUP key enters setup mode 4 CAL DATA key last calibration data viewing enters and exits 5 CAL key initiates and exits calibration mode 6 key increases the blinking digit letter by one when selecting a parameter Advances forward while in last calibration dat...

Страница 5: ...only 20 C 68 F 2 mV mV600seriesonly 0 5 C TypicalEMCDeviation 0 2 pH pH500seriesonly 10 mV mV600seriesonly 0 5 C Calibration pH automatic 1 2 or 3 point at pH 4 01 7 01 10 01 ORP automatic 2 point at 0 and 350 or 1900 mV Temperature Compensation pH 500 series only automatic with Pt100 probe or manual 9 9 to 120 C Outputs digital RS232 bi directional optoisolated or analog galvanically isolated 0 1...

Страница 6: ...or keys PowerSupply Connecta3 wirepowercable to the terminal strip while paying attention to the correct line L earth PE and neu tral N terminal connections Power 115VAC 100 mA 230VAC 50 mA Line Contact fused inside 400 mA PE must be connected to ground leakage current 1mA Electrode Connect the pH or ORP electrode to the BNC socket 10 at page 7 To benefit from the differential input connect the pr...

Страница 7: ... mode M2 same as relay 1 0 no 22 Relay 2 setpoint S2 0 00 to 14 00 pH 6 00 pH no 2000 to 2000 mV 500 mV 23 Relay 2 hysteresis H2 0 00 to 14 00 pH 1 pH no 0 to 4000 mV 50 mV 24 Relay 2 deviation D2 0 50 to 14 00 pH 1 pH no 25 to 4000 mV 50 mV Available only in models with two relays Then confirm the displayed digit with and move to the next one When the whole password has been inserted press CFM to...

Страница 8: ...then S1 S2 H2 S1 D1 LA HA S2 If M1 1 and M2 4 then S1 H1 S2 S2 D2 LA HA S1 If M1 3 and M2 4 Code Valid Values Default PW 30 Relay 3 high alarm HA 0 00 to 14 00 pH 9 00 pH no 2000 to 2000 mV 600 mV HA LA HA S1 or HA S2 31 Relay 3 low alarm LA 0 00 to 14 00 pH 5 00 pH no 2000 to 2000 mV 600 mV LA HA LA S1 or LA S2 32 Proportional control 1 to 30 min 5 no mode period 33 Maximum relay ON time 10 to 99...

Страница 9: ...roportional low setpoint base dosage if available 4 proportional high setpoint acid dosage if available then S1 S2 S2 D2 LA HA S1 D1 If M1 4 and M2 3 then S2 S1 S1 D1 LA HA S2 D2 where the minimum deviation D1 or D2 is 0 5 pH for pH 500 or 25 mV for mV 600 Note The password cannot be viewed when SETUP is pressed without entering the original password first The default password is set at 0000 In th...

Страница 10: ...er boundary is imposed for acid base dosage time when relays are energized continuously i e when relay works in ON OFF mode or in proportional mode but in the latter case only if the relay is always ON This parameter can be set through setup procedure When the maximum boundary is reached an alarm is generated device stays in alarm condi tion until relay is de energized ON OFF CONTROL MODE Either f...

Страница 11: ...ll also provide a visual warning sig nal The Fail Safe mode is accomplished by connecting the exter nal alarm circuit between the FS C Normally Open and the COM terminals This way an alarm 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 Safe feature a...

Страница 12: ...4 open OFF i e 0 20 mA 4 20 mA and 0 10 Vdc In any case contact the nearest Hanna Customer Service Center for changing of the default configuration By default the minimum and maximum values of analog out put correspond to the minimum and maximum of the range of the meter For example for the pH 500 series with a se lected analog output of 4 20 mA the default values are 0 00 and 14 00 pH correspondi...

Страница 13: ...0010 cable Make sure that your meter is switched off and plug the connectors one to the meter RS232 connector and the other to the serial port of your PC If your interface does not fully comply with the RS232 stan dard wiring could be different The GND pin of the interface connector and all the inter face signals are optoisolated from the ground of the instrument the pH electrode and the temperatu...

Страница 14: ...dicator The user is also guided with indica tions on the display during the calibration procedure Initial Preparation Pour small quantities of pH 7 01 HI 7007 and pH 4 01 HI 7004 and or pH 10 01 HI 7010 solutions into individual beakers If possible use plastic beakers to minimize any EMC interference HI 7007 H I 7 0 0 4 HI 7004 Excel Copyright of Microsoft Co Lotus 1 2 3 Copyright of Lotus Co Wind...

Страница 15: ...value For best accuracy however it is recommended that a two point calibration is performed HI 7007 CALIBRATION HI 7007 RINSE For accurate calibration use two beakers for each buffer solution the first one for rinsing the electrode the second one for calibration By doing this contamination between the buffers is minimized To obtain accurate readings use pH 7 01 and pH 4 01 if you measure acidic sa...

Страница 16: ...bration Two point Calibration Proceed as described above for one point cali bration usingpH 7 01asthefirstpoint butdo notquitcalibrationbypressingCALattheend Note The meter will automatically skip the buffer that was used for the first calibration to prevent errors After the first calibration point is con firmed immerse the pH electrode with the Potential Matching Pin into the sec ondbuffer e g pH...

Страница 17: ...ady reading CALIBRATION WITH MANUAL TEMPERATURE COMPENSATION Enter the calibration procedure and press LCD to display the temperature on the secondary LCD Unplug any temperature probe that may be attached to the meter The C sym bol will flash Note the temperature of the buffer solutions with a ChecktempC or an accurate thermometer with a resolution of 0 1 C Use or to manually adjust the display re...

Страница 18: ...zed at a point near the first calibration point CAL will stop blinking and an intermittent CFM icon will prompt the user to confirm the first calibration If the display stabilizes at a value significantly different from the first setpoint an intermittent WRONG icon will prompt the user to check and adjust the simulator and start again After pressing CFM the unit will switch to the second cali brat...

Страница 19: ... type Immerse the temperature probe in the second beaker as near to the Checktemp as possible and repeat the above procedure Calibration procedure may be interrupted by pressing CAL again at any time If the calibration procedure is stopped this way or if the controller is switched off before the last step no calibration data is stored in non volatile memory EEPROM ANALOG OUTPUT CALIBRATION In the ...

Страница 20: ...time of calibration and the values of the 2 calibration points Dis playing of these items follows the above sequence To begin the cycle press CAL DATA The last calibration date will appear on the main LCD display as DD MM format while the secondary display will show the year If the meter has never calibrated or an EEPROM reset has occurred no calibration data is shown when CAL DATA is pressed The ...

Страница 21: ...lar operating display Press or to view the time of last calibration The sec ondary display will show HOU to indicate hours Press or again to view the offset in mV at the time of last calibration 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 or agai...

Страница 22: ...key During the automatic startup the Real Time Clock RTC is checked to see if a reset occurred since last software ini tialization In this case the RTC is initialized with the default date and time 01 01 1997 00 00 An EEPROM reset does not affect the RTC settings The EEPROM is also checked to see if it is new If this is the case the default values are copied from ROM and then the device enters nor...

Страница 23: ...n data is also reset For this reason the CAL flag blinks until the pH calibration is performed The error detection for dead loops is performed by watchdog see below You can use special setup codes perform selftest procedures for LCD keyboard EEPROM relays and LEDs watchdog The operation of these functions is outlined in the setup sec tion The selftest procedures are described in detail in the foll...

Страница 24: ...the display should show pH 4 01 7 01 or 10 01 at pH 4 7 or 10 buffers respectively At 20 C the display should show pH 4 00 7 03 or 10 06 The meter reading at 50 C will then be 4 06 6 98 or 9 82 RELAYS AND LEDS Relays and LEDs selftests are executed as follows First all of the relays and LEDs are switched off then they are switched on one at a time for a few seconds and cyclically User can interrup...

Страница 25: ...eam or tank When not in use replace the solution in the protective cap with a few drops of HI 70300 storage solution or in its absence HI 7007 pH 7 01 buffer solution Follow the Preparation Procedure above before taking mea surements Note NEVER STORE THE ELECTRODE IN DISTILLED OR DEION IZED WATER PERIODIC MAINTENANCE Inspect the electrode and the cable The cable used for the connection to the cont...

Страница 26: ...junction Protein Soak in Hanna HI 7073 protein cleaning so lution for 15 minutes Inorganic Soak in Hanna HI 7074 inorganic cleaning solution for 15 minutes Oil grease Rinse with Hanna HI 7077 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 neces ...

Страница 27: ... change the elec trode to see if the problem is alleviated TAKING REDOX MEASUREMENTS Redox measurements allow the quantification of the oxidizing or reducing power of a solution and are commonly expressed in mV Oxidation may be defined as the process during which a molecule or an ion loses electrons and reduction as the process by which electrons are gained Oxidation is always coupled together wit...

Страница 28: ...tein cleaning solution 230 mL bottle HI 7073L Protein cleaning solution 500 mL bottle HI 7074M Inorganic cleaning solution 230 mL bottle HI 7074L Inorganic cleaning solution 500 mL bottle HI 7077M Oil Fat cleaning solution 230 mL bottle HI 7077L Oil Fat cleaning solution 500 mL bottle HI 7071 3 5M KCl AgCl electrolyte solution 4x50 mL bottle for single junction electrodes HI 7072 1M KNO3 electroly...

Страница 29: ...5 In addition to the electrode connector there is also a spade lug connection for the matching pin PLATINUM ORP ELECTRODES HI 3090T Screw connector external PG13 5 thread double junction Pt glass body polymer filled HI 3210T Screw connector external PG13 5 thread double junction Pt plastic body cloth junction HI 3211T Screw connector external PG13 5 thread double junction Pt plastic body PVDF junc...

Страница 30: ...lectrode connector there is also a spade lug connection for the matching pin OTHER ACCESSORIES BL PUMPS Dosing pumps with flow rate from 1 5 to 20 lph HI 98501 ChecktempC Electronic thermometer range 50 0 to 150 0 C HI 98502 ChecktempF Electronic thermometer range 58 0 to 302 F HI 6050 HI 6051 Submersible electrode holders HI 6054 HI 6057 Electrode holders for in line applications HI 778P Screened...

Страница 31: ...p and materials when used for their intended purpose and maintained accord ing to instructions The electrodes and the probes are guaranteed for a period of six months This warranty is limited to repair or replacement free of charge Damage due to accident misuse tampering or lack of prescribed maintenance are not covered If service is required contact the dealer from whom you purchased the instrume...

Страница 32: ...e exceed 24 Vac or 60 Vdc To avoid damage or burns do not perform any measurement in microwave ovens Unplug the instruments from power supply before the replacement of the fuse External cables to be connected to the rear panel should be terminated with cable lugs HANNA LITERATURE Hanna publishes a wide range of catalogs and handbooks for an equally wide range of applications The reference lit erat...

Страница 33: ...84 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 Fax 011 615 8582 Taiwan Tel 886 2 2739 3014 Fax 886 2 2739 2983 Thailand Tel 66 2619 0708 Fax 66 2619 0061 United Kingdom Tel 01525 850 855 Fax 01525 853 668 USA Tel 401 765 7500 Fax 401 765 7575 For...

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