pH 500/mV 600 Series Panel-mounted, Microprocessor-based Process pH/mV Meters Instruction Manual
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TABLE OF CONTENTS PRELIMINARY EXAMINATION . . . . . . . . . . . . . . . . . 4 GENERAL DESCRIPTION. . . . . . . . . . . . . . . . . . . . . 4 FUNCTIONAL DESCRIPTION . . . . . . . . . . . . . . . . . 6 MECHANICAL DIMENSIONS . . . . . . . . . . . . . . . . . 7 SPECIFICATIONS pH 500 & mV 600 . . . . . . . . . . . . 8 INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 SETUP MODE . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 CONTROL MODE . . . . . . . . . . . . . . . . . . . . . . .
PRELIMINARY EXAMINATION Remove the instrument from the packing material and examine it carefully to make sure that no damage has occurred during shipping. If there is any noticeable damage, notify your Dealer or the nearest Hanna Customer Service Center immediately. Note Save all packing materials until you are sure that the instrument functions correctly. Any damaged or defective items must be returned in their original packing materials together with the supplied accessories.
• Temperature compensation of the pH reading (for pH 500 Series only). • Manual temperature setting when the temperature probe is not inserted or temperature exceeds the upper range. • Last calibration data internally recorded (non-volatile EEPROM memory): calibration date and time, pH offset, pH slopes, number of calibration points and correspondent pH values (for pH 500 Series only) or calibration date and time and the mV calibration points used (for mV 600 Series only).
FUNCTIONAL DESCRIPTION FRONT PANEL 1. Liquid Crystal Display 2. LCD key exits from setup and calibration modes and reverts back to normal mode (in idle or control phases with the measurement 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.
REAR PANEL 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. RS232 Connection Port (pH500XY2 and mV600XY2 models only) Analog Output (pH500XY1 and mV600XY1 models only) Power Supply Input Alarm Terminal Relay 2 - Second Dosing Terminal (pH5002XY models only) Relay 1 - First Dosing Terminal Connections for Pt 100 Temperature Sensor Connection for Electrode Reference Connection for Potential Matching Pin BNC Socket for pH or ORP Electrode ±5V Power Supply Output Unplug the meter before starting any electrical connections.
SPECIFICATIONS pH 500 & mV 600 Range 0.00 to 14.00 pH ±2000 mV -9.9 to 120.0 °C Resolution 0.01 pH 1 mV 0.1 °C Accuracy ±0.02 pH (pH 500 Series only) ±2 mV (mV 600 Series only) ±0.5 °C (@20°C/68°F) (pH 500 Series only) (mV 600 Series only) (pH 500 Series only) (mV 600 Series only) Typical EMC Deviation ±0.2 pH (pH 500 Series only) ±10 mV (mV 600 Series only) ±0.
INSTALLATION pH 500 and mV 600 offer a multitude of possibilities, from single and dual setpoints to ON/OFF or proportional dosage, isolated outputs with user-selectable zoom, bi-directional RS232, recorder outputs in mAmps and volts. In addition, pH 500 and mV 600 are both equipped with the exclusive differential input. In a system with poor grounding, it is possible to have a ground current flowing through the reference junction. This can cause a rapid degradation of the electrode.
• Power Supply: Connect a 3-wire power cable to the terminal strip, while paying attention to the correct line (L), earth (PE) and neutral (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).
SETUP MODE pH 500 and mV 600 offer a multitude of possibilities from ON/OFF or proportional dosage to analog recorder output and from alarm to selftest features. The Setup Mode allows the user to set all needed characteristics of the meter. The setup mode is entered by pressing SETUP and entering the password when the device is in idle or control mode.
• Then confirm the displayed digit with and move to the next one. • When the whole password has been inserted, press CFM to confirm it. Note The default password is set at “0000”. • The LCD will display “SET” on the upper part and “c.00” on the lower, allowing the user to edit setup parameters (see table below). • Enter the code of the parameter you want to set, using the arrow keys as per the password procedure above (e.g.41).
• After confirmation, the selected parameter is displayed. The user can scroll through the parameters by pressing CFM. In order to directly set another parameter, press SETUP again and enter the code or scroll to it by pressing CFM.
Code 14 Valid Values Default PW 30 Relay 3 high alarm (HA) 0.00 to 14.00 pH 9.00 pH -2000 to 2000 mV 600 mV HA>LA, HA>S1 or HA>S2 no 31 Relay 3 low alarm (LA) 0.00 to 14.00 pH 5.
Note Code Valid Values Default PW 92 EEPROM selftest 0: off 1: on 0 yes 93 Relays and LEDs selftest 0: off 1: on 0 yes 94 Watchdog selftest 0: off 1: on 0 yes 99 Unlock password 0000 to 9999 0000 yes 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 prompt the user.
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). 16 Note The password cannot be viewed when SETUP is pressed without entering the original password first. The default password is set at “0000”.
CONTROL MODE The control mode is the normal operational mode for these meters. During control mode pH 500 and mV 600 fulfill the following main tasks: • convert information from pH/ORP and temperature inputs to digital values; • control relays and generate the analog outputs as determined by the setup configuration, display alarm condition; • RS232 management. In addition, pH 500 and mV 600 can log working data through RS232 connection.
An upper 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 condition until relay is de-energized.
ON OFF Setpoint Setpoint + Hysteresis 14 PROPORTIONAL CONTROL MODE The user can vary three different parameters, i.e. the setpoint (S1 or S2), the deviation (D1 or D2) and the proportional control mode period Tc from 1 to 30 minutes. Duration of the activated control is directly proportional to the error value (Duty Cycle Control Mode): as the measurement approaches setpoint, the ON period diminishes. The following graph describes the pH process controller behavior.
• ALWAYS OFF if pH > setpoint; ON Low setpoint mode OFF 0 alarm Setpoint– Deviation 14 Setpoint Using a similar format, the second relay may be set up according to the diagram below. High setpoint mode ON OFF 0 Setpoint Setpoint + Deviation alarm 14 ALARM RELAY The alarm relay functions in the following manner: FS•C = NO (Normally Open) Energized Relay COM FS•O = NC (Normally Closed) De-energized Relay During alarm condition, the relay is de-energized.
In addition to the user-selectable alarm relays, all pH 500 and mV 600 models are equipped with the Fail Safe alarm feature. The Fail Safe feature protects the process against critical errors arising from power interruptions, surges and human errors. This sophisticated yet easy-to-use system resolves these predicaments on two fronts: hardware and software.
IDLE MODE During idle mode the device performs the same tasks as when it is in control mode except for the relays. The alarm relay is activated (no alarm condition), the acid and base relays are not activated while the analog output remains 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 exter- nal devices are not installed or when the user detects unusual circumstances.
ANALOG OUTPUT All models pH 500XY1 and mV 600XY1 are provided with the analog output feature. The output is isolated and can be a voltage or a current. With the recorder, simply connect the common port to the ground output and the second port to the current output or voltage output (depending on which parameter is being used) as depicted aside. The type (voltage or current) and the range of the output analog signal is selectable through the jumpers on the power board.
These values can be changed by the user to have the analog output matches a different pH range, for example, 4 mA = 3.00 pH and 20 mA = 5.00 pH. To change the default values, the setup mode must be entered. Setup codes for changing the analog output minimum and maximum are 41 or 42, respectively. For the exact procedure, refer to the setup mode section in the manual. 24 Note The difference between maximum and minimum values for the analog output must be at least 1.00 pH or 50 mV.
RS 232 COMMUNICATION AND DATA LOGGING All models pH 500XY2 and mV 600XY2 are provided with an RS 232C port. Data transmission from the instrument to the PC is possible with the HI 92500 Windows® compatible application software offered by Hanna Instruments. The user-friendly HI 92500 offers a variety of features such as logging selected variables or plotting the recorded data. It also has an on-line help feature to support you throughout the operation.
Note Cables other than HI 920010 may use a different configuration. In these cases, no communication between the meter and the PC is possible.
CALIBRATION The controller is factory calibrated for mV and temperature inputs as well as for the analog outputs. The user should periodically calibrate the instrument. For greatest accuracy, it is recommended that the instrument is calibrated frequently. It is possible to standardize the electrode with only one buffer, preferably close to the expected sample value (one-point calibration), but it is always good practice to calibrate in at least 2 points.
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. RINSE CALIBRATION HI 7007 HI 7007 To obtain accurate readings, use pH 7.01 and pH 4.01 if you measure acidic samples, or pH 7.01 and pH 10.01 for alkaline measurements or perform a 3-point calibration for the entire range.
• Remove the protective cap from the pH electrode and immerse it into the selected buffer solution (e.g. pH 7.01) with the Potential Matching Pin and temperature probe, then stir gently. Note The electrode should be submerged approximately 4 cm (1½") in the solution. The temperature probe should be located as close as possible to the pH electrode.
Two-point Calibration • Proceed as described above for one-point calibration, using pH 7.01 as the first point, but do not quit calibration by pressing CAL at the end. Note The meter will automatically skip the buffer that was used for the first calibration to prevent errors. • After the first calibration point is confirmed, immerse the pH electrode with the Potential Matching Pin into the second buffer (e.g. pH 4.
Three-point Calibration • Proceed as described above but do not quit calibration by pressing CAL. Note The meter will automatically skip the two buffers that were used to prevent errors. • After the second calibration point is confirmed, immerse the pH electrode and the Potential Matching Pin into the third buffer solution (e.g. pH 10.01) and stir gently. Note The electrode should be submerged approximately 4 cm (1½") in the solution.
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" symbol 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 reading to the value of the reference thermometer (e.g. 20°C).
mV INPUT CALIBRATION The pH/mV controller is factory calibrated for the mV and temperature inputs. However, the user may also perform a mV calibration. • Short the Connection for Potential Matching Pin (#9 at page7) and the Connection for the Electrode Reference (#8 at page 7) with a jumper wire. • Attach a HI 931001 (pH 500) or HI 8427 (mV 600) simulator to the BNC socket. • Press and hold first CFM and then CAL to enter the mV Input Calibration mode. • Execute the password procedure.
• When the reading has stabilized 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 calibration point at 350 mV.
• Use a Checktemp or a calibrated thermometer with a resolution of 0.1° as a reference thermometer. • Immerse the temperature probe in the beaker with ice and water as near to the Checktemp as possible. °C 0 °C (32 °F) • Press and hold first CFM and then CAL to enter the temperature calibration mode. • Execute the password procedure. • With pH 500, the meter will ask for the calibration procedure code number. Use or to select code 1 for the temperature calibration and press CFM to enter.
°C • Immerse the temperature probe in the second beaker as near to the Checktemp as possible and repeat the above procedure. 50 °C (122 °F) 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).
• Press CFM to confirm the selected parameter that will stop blinking on the primary display. The secondary display shows the HI 931002 or multimeter input value as lower limit of the interval. • Use the or to make the HI 931002 or multimeter output correspond with the meter’s value shown on the secondary display (e.g. 4). • Wait for approximately 30 seconds (until the reading of the calibrator is stable). • Press CFM to enter. The meter will switch to the second calibration point.
OUTPUT TYPE CALIBRATION CODE CALIBRATION POINT 1 CALIBRATION POINT 2 0-1 mA 0 0 mA 1 mA 0-20 mA 1 0 mA 20 mA 4-20 mA 2 4 mA 20 mA 0-5 VDC 3 0 VDC 5 VDC 1-5 VDC 4 1 VDC 5 VDC 0-10 VDC 5 0 VDC 10 VDC
LAST CALIBRATION DATA The meter stores the following information about last calibration in the EEPROM: • Date • Time • Offset in mV (for pH 500 only) • Up to two slopes (for pH 500 only) • Up to three buffers While displaying this data, the pH controller remains in control mode. The procedure below indicates the flow for a three-point calibration. The sequence will vary if fewer calibration points are used (e.g.
Note In any moment, by pressing LCD or CAL DATA the meter will return to the regular operating display. • Press or to view the time of last calibration. The secondary 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 again to view the second memorized buffer at the time of last calibration. The secondary 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. • Press or again to return to the first CAL DATA display (date) at the time of last calibration.
STARTUP At startup the firmware release code scrolls through the LCD; it is possible to escape from code scrolling pressing any key. During the automatic startup the Real Time Clock (RTC) is checked to see if a reset occurred since last software initialization. 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.
FAULT CONDITIONS AND SELFTEST PROCEDURES The fault conditions below may be detected by the software: • EEPROM data error; • I2C internal bus failure; • code dead loop. EEPROM data error can be detected through EEPROM test procedure at startup or when explicitly requested using setup menu. When an EEPROM error is detected, user is given the option to perform a reset of EEPROM. Thus the reset can be performed whenever needed.
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 section. The selftest procedures are described in detail in the following subsections. DISPLAY SELFTEST The display selftest procedure consists of lighting up all of the display segments together. The Display test is announced by a scrolling "Display test" message.
The colon is a useful indicator for the correct position of squares. Note A maximum of two keys may be pressed simultaneously to be properly recognized. To exit the keyboard test procedure press LCD, CAL and SETUP simultaneously. EEPROM SELFTEST The EEPROM selftest procedure involves verifying the stored EEPROM checksum. If the checksum is correct the “Stored data good” message will be shown for a few seconds before exiting selftest procedure.
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 interrupt the otherwise endless cycle, as 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 condition is detected a reset is automatically invoked.
pH VALUES AT VARIOUS TEMPERATURES Temperature has a significant effect on pH. The calibration buffer solutions are effected by temperature changes to a lesser degree than normal solutions. For manual temperature calibration please refer to the following chart: TEMP °C °F 4.01 pH VALUES 7.01 10.01 0 32 4.01 7.13 10.32 5 41 4.00 7.10 10.24 10 50 4.00 7.07 10.18 15 59 4.00 7.04 10.12 20 68 4.00 7.03 10.06 25 77 4.01 7.01 10.01 30 86 4.02 7.00 9.96 35 95 4.03 6.99 9.
ELECTRODE CONDITIONING AND MAINTENANCE * Only available with refillable electrodes. For industrial applications, gel-filled electrodes are preferable due to lesser maintenance requirements. PREPARATION Remove the protective cap. DO NOT BE ALARMED IF ANY SALT DEPOSITS ARE PRESENT. This is normal with electrodes and they will disappear when rinsed with water. During transport tiny bubbles of air may have formed inside the glass bulb. The electrode cannot function properly under these conditions.
If the bulb and/or junction are dry, soak the electrode in HI 70300 Storage Solution for at least one hour. For refillable electrodes**: If the refill solution (electrolyte) is more than 2½ cm (1") below the fill hole, add HI 7082 3.5M KCl Electrolyte Solution for double junction or HI 7071 3.5M KCl+AgCl Electrolyte Solution for single junction electrodes. For AmpHel® electrodes: If the electrode does not respond to pH changes, the battery is run down and the electrode should be replaced.
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 Storage Procedure above. CLEANING PROCEDURE General IMPORTANT Soak in Hanna HI 7061 General Cleaning Solution for approximately ½ hour. Removal of films, dirt or deposits on the membrane/junction: Protein Soak in Hanna HI 7073 Protein Cleaning Solution for 15 minutes.
• 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 Hanna Solution HI 7061 for 30 minutes, rinse thoroughly in distilled water and then follow the Cleaning Procedure above.
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 with reduction so that as one element gets oxidized, the other is automatically reduced, therefore the term oxidation-reduction is frequently used.
Note pH mV pH mV pH mV pH mV pH mV 0 990 1 920 2 860 3 800 4 740 5 680 6 640 7 580 8 520 9 460 10 400 11 340 12 280 13 220 14 160 Reducing pretreatment: immerse the electrode for a few minutes in HI 7091. Oxidizing pretreatment: immerse the electrode for a few minutes in HI 7092. If the pretreatment is not performed, the electrode will take significantly longer to respond.
ACCESSORIES pH CALIBRATION SOLUTIONS HI 7004M pH 4.01 Buffer Solution, 230 mL HI 7004L pH 4.01 Buffer Solution, 460 mL HI 7004/L pH 4.01 Buffer Solution, 1 L HI 7007M pH 7.01 Buffer Solution, 230 mL HI 7007L pH 7.01 Buffer Solution, 460 mL HI 7007/L pH 7.01 Buffer Solution, 1 L HI 7010M pH 10.01 Buffer Solution, 230 mL HI 7010L pH 10.01 Buffer Solution, 460 mL HI 7010/L pH 10.
RECOMMENDED pH ELECTRODES (All electrodes gel-filled and with ceramic junction unless otherwise indicated). HI 1090T Screw connector, external PG13.5 thread, double junction, glass-body, polymer filled HI 1210T HI 1211T Screw connector, external PG13.5 thread, double junction, Ultem®-body; cloth junction (HI 1210T); Teflon® junction, polymer-filled (HI 1211T) HI 2910B/5 HI 2911B/5 BNC connector, 5 m (16.
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, Ultem®-body, cloth junction HI 3211T Screw connector, external PG13.5 thread, double junction, Pt, Ultem®-body, Teflon® junction, polymer-filled HI 2930B/5 BNC connector, 5 m (16.
HI 3210B/5 BNC connector, 5 m (16.5') cable, double junction, Pt, Ultem®-body, Teflon® junction, polymer-filled GOLD ORP ELECTRODES HI 4932B/5 BNC connector, 5 m (16.
ORP ELECTRODES ½‘’ thread, double Teflon® junction, polymer filled, max operating pressure of 6 bar (87 psi) PLATINUM ELECTRODES Part Code Matching Pin Amplifier Connector Cable HI 2002/3 NO NO BNC 3 m (10’) HI 2002/5 NO NO BNC 5 m (16.5’) HI 2003/3 YES NO BNC* 3 m (10’) HI 2003/5 YES NO BNC* 5 m (16.5’) HI 2004/5 YES YES spade lugs* 5 m (16.
OTHER ACCESSORIES BL PUMPS Dosing Pumps with Flow Rate from 1.5 to 20 LPH ChecktempC ChecktempF HI 6050 & HI 6051 HI 6054 & HI 6057 HI 778P HI 7871 & HI 7873 HI 8427 HI 8614 HI 8614L HI 8615 HI 8615L HI 920010 HI 920010-9 HI 92500 HI 931001 HI 931002 Stick Thermometer (range -50.0 to 150.0°C) Stick Thermometer (range -58.
WARRANTY All Hanna Instruments meters are guaranteed for two years against defects in workmanship and materials when used for their intended purpose and maintained according 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 instrument.
OTHER PRODUCTS FROM HANNA • • • • • • • • • • • • • • • • • • • CALIBRATION AND MAINTENANCE SOLUTIONS CHEMICAL TEST KITS CHLORINE METERS CONDUCTIVITY/TDS METERS DISSOLVED OXYGEN METERS HYGROMETERS ION SPECIFIC METERS MAGNETIC STIRRERS Na/NaCl METERS pH/ORP/Na ELECTRODES PROBES (DO, µS/cm, RH, T, TDS) PUMPS REAGENTS SOFTWARE THERMOMETERS TITRATORS TRANSMITTERS TURBIDITY METERS Wide Range of Accessories Most Hanna meters are available in the following formats: • BENCH-TOP METERS • POCKET-SIZED METERS • PORT
CE DECLARATION OF CONFORMITY Recommendations for Users Before using these products, make sure that they are entirely suitable for the environment in which they are used. Operation of these instruments in residential areas could cause unacceptable interferences to radio and TV equipment. To maintain the EMC performance of 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.
HANNA LITERATURE Hanna publishes a wide range of catalogs and handbooks for an equally wide range of applications. The reference literature currently 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 others catalogs, handbooks and leaflets, contact your dealer or the Hanna Customer Service Center nearest to you.
MANPH500R5 04/02 w w w . h a n n a i n s t .
