Hanna Instruments HI2221-01 Owner Manual
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Instruction Manual HI2221 - HI2223 pH/mV/ºC Bench Meters with Calibration Check www.hannainst.com 1 Dear Customer, Thank you for choosing a Hanna Instruments product. Please read this instruction manual carefully before using these instruments. This manual will provide you with the necessary information for correct use of these instruments, as well as a precise idea of their versatility. If you need additional technical information, do not hesitate to e‑mail us at [email protected] or view our worldwide contact list at www.hannainst.com. All rights are reserved. Reproduction in whole or in part is prohibited without the written consent of the copyright owner. 2 TABLE OF CONTENTS PRELIMINARY EXAMINATION...........................................................4 GENERAL DESCRIPTION...................................................................4 FUNCTIONAL DESCRIPTION..............................................................5 HI2221 SPECIFICATIONS................................................................6 HI2223 SPECIFICATIONS................................................................7 OPERATIONAL GUIDE......................................................................8 pH CALIBRATION..........................................................................10 ENHANCED CALIBRATION MESSAGES.............................................14 ELECTRODE CONDITION AND ELECTRODE RESPONSE TIME...............16 pH BUFFER TEMPERATURE DEPENDENCE.......................................17 GOOD LABORATORY PRACTICE (GLP)...............................................18 LOGGING......................................................................................21 SETUP.........................................................................................24 TEMPERATURE CALIBRATION (for technical personnel only)..............27 mV CALIBRATION (for technical personnel only)...............................29 PC INTERFACE..............................................................................30 ELECTRODE CONDITIONING AND MAINTENANCE..............................34 TROUBLESHOOTING GUIDE...........................................................37 TEMPERATURE CORRELATION FOR pH SENSITIVE GLASS..................38 ACCESSORIES...............................................................................39 3 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 damage, please contact your local Hanna Instruments Office. Each instrument is supplied complete with: • HI1131P Glass-body Combination pH Electrode with 1 m (3.3“) cable • HI7662 Temperature Probe • HI76404N Electrode Holder • pH4.01 & 7.01 Buffer Solutions (20 mL each) • HI7082 Electrolyte Solution • HI700661 Cleaning Solutions (20 mL each) • 12 VDC Power Adapter • Instruction Manual • Quality Certificate Note: Save all packing material until you are sure that the instrument functions correctly. All defective items must be returned in the original packing with the supplied accessories. GENERAL DESCRIPTION HI2221 and HI2223 are logging microprocessor-based pH/ORP/ temperature bench meters with Calibration Check. Calibration Check performs a set of diagnostic tests during calibration using the history of electrode slope and offset to detect problems that can cause loss of accuracy. Calibration Check Features are: • Enhanced Calibration Messages During calibration the user is warned if one or more parameters are not suitable to perform an accurate calibration. • Electrode Condition on LCD Display Determined from the electrode offset and slope. • Electrode response time on LCD Display Determined from electrode performance during calibration. Other features include: up to five pH point calibration with seven mem‑ orized buffers (1.68, 4.01, 6.86, 7.01, 9.18, 10.01 and 12.45 pH), logging up to 100 samples (for HI2221) and 500 samples (for HI2223), GLP, calibration due alarm, pH reading with manual or automatic temperature compensation and PC software interface. 4 FUNCTIONAL DESCRIPTION Front Panel Rear Panel 1) Liquid Crystal Display (LCD). 2) CAL key, to enter and exit calibration mode. 3) CFM/GLP key, to confirm calibration, different values or to display Good Laboratory Practice information. 4) °C key, to manually increase temperature value or other parameters. 5) °C key, to manually decrease temperature value or other parameters. 6) SETUP key, to enter/exit SETUP mode. 7) RANGE key, to select measurement range, switch to focused data in SETUP or to toggle between buffer value and temperature during calibration. 8) LOG/CLR key, to store a value into memory, to clear pH calibration, or to delete log records. 9) RCL key, memory recall. 10) ON/OFF switch. 11) Power supply socket. 12) USB connector. 13) BNC electrode connector. 14) Temperature probe socket. 15) Electrode reference socket. 5 HI2221 SPECIFICATIONS –2.00 to 16.00 pH ±699.9 mV Range ±2000 mV –20.0 to 120.0 °C (-4.0 to 248.0 °F) 0.01 pH 0.1 mV (±699.9 mV) Resolution 1 mV (±2000 mV) 0.1 °C ±0.01 pH Accuracy ±0.2 mV (±699.9 mV) @ 20 °C/68 °F ±1 mV (±2000 mV) ±0.2 °C (excluding probe error) Calibration Check Yes Computer Interface Opto-isolated USB Automatic up to 5 points, 7 buffers available pH Calibration (1.68, 4.01, 6.86, 7.01, 9.18, 10.01, 12.45) Logging 100 points Temperature Manual or Automatic from: Compensation –20.0 to 120.0 °C (–4.0 to 248.0 °F) HI1131P glass body, double junction refillable pH Electrode cell, BNC + pin (included) Temperature Probe HI7662 stainless steel probe (included) Input Impedance 1012 ohm Power Supply 12 VDC adapter (included) 0 – 50 °C (32 -– 122 °F) Environment max RH 95 % non condensing Dimensions 235 x 222 x 109 mm (9.2 x 8.7 x 4.3”) 1.3 Kg (2.9 lb); Weight kit with holder 2.1 Kg (4.6 lb) Warranty 2 years 6 HI2223 SPECIFICATIONS –2.00 to 16.00 pH –2.000 to 16.000 pH Range ±999.9 mV ±2000 mV –20.0 to 120.0 °C (-4.0 to 248.0 °F) 0.01 pH 0.001 pH Resolution 0.1 mV (±999.9 mV) 1 mV (±2000 mV) 0.1 °C ±0.01 pH ±0.002 pH Accuracy ±0.2 mV (±999.9 mV) @ 20 °C/68 °F ±1 mV (±2000 mV) ±0.2 °C (excluding probe error) Calibration Check Yes Computer Interface Opto-Isolated USB Automatic up to 5 points, 7 buffers available pH Calibration (1.68, 4.01, 6.86, 7.01, 9.18, 10.01, 12.45) Logging 500 points Temperature Manual or Automatic from: Compensation –20.0 to 120.0 °C (–4.0 to 248.0 °F) HI1131P glass body, double junction refillable pH Electrode cell, BNC + pin (included) Temperature Probe HI7662 stainless steel probe (included) Input Impedance 1012 ohm Power Supply 12 VDC adapter (included) 0 – 50 °C (32 – 122 °F) Environment max RH 95 % non condensing Dimensions 235 x 222 x 109 mm (9.2 x 8.7 x 4.3”) 1.3 Kg (2.9 lb); Weight kit with holder 2.1 Kg (4.6 lb) Warranty 2 years 7 OPERATIONAL GUIDE POWER CONNECTION Plug the 12 VDC adapter into the power supply socket. Notes: • These instruments use non volatile memory to retain the pH, mV, temperature calibrations and all other settings, even when unplugged. • Make sure a fuse protects the mains line. ELECTRODE AND PROBE CONNECTIONS For Hanna Instruments P Type pH or ORP electrodes (with internal reference) connect the electrode’s BNC to the socket on the back of the instrument and the pin to the reference socket. Note: Electrode condition and response information is displayed on the bar graph gauges during the day the calibration is performed, only if Hanna Instruments P type (PIN) electrodes are used. If the electrode is not recognized as a Hanna Instruments P type electrode, the bar graph gauges will blink (25 seconds OFF, 4 seconds ON, full bar graph). For temperature measurement and automatic temperature compensation connect the temperature probe to the appropriate socket. INSTRUMENT START-UP • Turn the instrument on by pressing the ON/OFF switch located on the rear panel. • All LCD tags are displayed and a beep is sounded while the instrument performs a self test. • The instrument will display “LoAD” message and “ ” blinking until initialization is complete. • The “Unscrew electrode refilling cap” message reminds the user to loosen or remove the electrode refilling cap to improve the electrode’s response time. • The instrument automatically defaults to pH measurement mode unless a Hanna Instruments P type ORP electrode is detected. pH MEASUREMENT Make sure the instrument has been calibrated before taking pH measurements. • Submerse the tip of a properly conditioned electrode (see page 34) and the temperature 8 probe approximately 3 cm (1¼”) into the sample to be tested and stir gently. Allow time for the electrode to stabilize. • The pH is displayed on the primary LCD and the temperature on the secondary LCD. • The pH reading is out of range, the closest full-scale value will be displayed blinking on the primary LCD. R A N G E If measurements are taken successively in different samples, it is recom‑ mended to rinse the electrode thoroughly with deionized water or tap wa‑ ter and then with some of the next sample to prevent cross-contamination. The pH reading is affected by temperature. In order to measure the pH accurately, this temperature effect must be compensated for. To use the Automatic Temperature Compensation feature, connect and submerse the HI7662 temperature probe into the sample as close to the electrode as possible and wait for a few minutes. If the temperature of the sample is known, manual compensation can be performed by disconnecting the temperature probe. The display will show the last recorded temperature reading with the “°C” symbol blinking. The temperature can now be adjusted with the ARROW keys (from -20.0 ºC to 120.0 ºC). ORP MEASUREMENTS An optional ORP electrode must be used to perform ORP measurements (see Accessories). Oxidation-Reduction Potential (REDOX) measurements provide the quantification of the oxidizing or reducing power of the tested sample. The surface of the ORP electrode must be clean and smooth in order to obtain an accurate measurement. 9 Pretreatment solutions are available to condition the electrode and speed up the response time. • The instrument automatically defaults to the mV measurement mode if Hanna Instruments P type ORP electrode is detected. • Submerse the ORP electrode tip (3 cm (1¼”) into the sample. Allow a few minutes for the reading to stabilize. • The instrument displays the mV reading on the primary LCD. • If the reading is out of range, the closest full-scale value will be displayed blinking on the primary LCD. TAKING TEMPERATURE MEASUREMENTS Connect the HI7662 temperature probe and turn the instrument on. Dip the temperature probe into the sample and allow the reading on the secondary LCD to stabilize. pH CALIBRATION Calibrate the instrument frequently, especially if high accuracy is required. For best results and constant display of electrode condition and electrode response on the bar graph gauges, daily calibration is recommended. The instrument should be recalibrated: • Whenever the pH electrode is replaced. • At least once a day. • After testing aggressive chemicals. • If high accuracy is required. • If “CAL DUE” message is displayed during measurement. Every time you calibrate the instrument use fresh buffers and perform an electrode cleaning procedure (see page 36). PREPARATION Pour small quantities of the buffer solutions into clean beakers. If possible, use plastic or glass beakers to minimize any EMC interferences. For accurate calibration and to minimize cross-contamination, use two beakers for each buffer solution. One for rinsing the electrode and one for calibration. 10 PROCEDURE Calibration can be performed up to five points. For accurate measurements a three point calibration is recommended. Calibration can be performed using the seven memorized buffers: • pH1.68, 4.01, 6.86, 7.01, 9.18, 10.01 and 12.45. FIVE-POINT CALIBRATION For most applications it is recommended that pH7.01 or 6.86 buffers be used as the first calibration point and pH4.01 (for acidic samples) or pH9.18/10.01 (for alkaline samples) as the second calibration point. Note: The pH12.45 buffer is not for general measurement; use only if the sample is very alkaline to avoid sodium error. • Submerse the pH electrode and the temperature probe approximately 3 cm (1¼”) into a buffer solution and stir gently. The temperature probe should be close to the pH electrode. • Press the CAL key. “CAL” and “pH” tags will be on, and the “CLEAR CAL if new electrode” tag will blink. • Press the CLR key if you are using a new electrode or want to clear the calibration history. The instrument will display the “donE” message for a few seconds. • Press the CAL key, or wait a few seconds to continue. It is very important to clear the calibration history when a new electrode is used because all error and warning messages that appear during calibration depend on the calibration history. Notes: • The “CLEAR CAL if new electrode” will only appear if the instrument has been previously calibrated. • The “CAL”, “pH” and “BUFFER” tags will appear and the “7.01” buffer will be displayed on the secondary LCD. • If necessary, press the ARROW keys to select a different buffer value. • The “ ” tag will blink until the reading has stabilized. 11 • When the reading is stable and close to the selected buffer, the “CFM” tag will blink and if enabled, an audible signal will sound. • Press the CFM key to confirm the calibration. The calibrated value will be displayed on the primary LCD and the second expected buffer value on the secondary LCD. • After the first calibration point is confirmed, submerse the pH electrode and the temperature probe approximately 3 cm (1¼”) into the second buffer solution and stir gently. The temperature probe should be close to the pH electrode. • If necessary, press the ARROW keys to select a different buffer value. Note: The instrument will automatically skip the buffer used for the first point. It also skips 6.86 if 7.01 was used, and vice versa. Likewise, it will skip 9.18 if 10.01 has been used, and vice versa. • The “ ” tag will blink on the LCD until the reading is stable. • When the reading is stable and close to the selected buffer the “CFM” tag will blink. • Press CFM to confirm calibration. • The calibrated value is then displayed on the C F M primary LCD and the third expected buffer value G L P on the secondary LCD. • After the second calibration point is confirmed, submerse the pH electrode and the temperature probe approximately 3 cm (1¼”) into the next buffer solution and stir gently. The temperature probe should be close to the pH electrode. • If necessary, press the ARROW keys to select a different buffer value. • The “ ” tag will blink on the LCD until the reading is stable. • When the reading is stable and close to the selected buffer the “CFM” tag will blink. • Press CFM to confirm calibration. • After the third calibration point is confirmed, C F M submerse the pH electrode and the temperature G L P probe approximately 3 cm (1¼”) into the next buffer solution and stir gently. The temperature probe should be close to the pH electrode. • If necessary, press the ARROW keys to select a different buffer value. • The “ ” tag will blink on the LCD until the reading is stable. 12 • When the reading is stable and close to the selected buffer the “CFM” tag will blink. • Press CFM to confirm calibration. • After the fourth calibration point is confirmed, submerse the pH electrode and the temperature C F M G L P probe approximately 3 cm (1¼”) into the next buffer solution and stir gently. The temperature probe should be close to the pH electrode. • If necessary, press the ARROW keys to select a different buffer value. • The “ ” tag will blink on the LCD until the reading is stable. • When the reading is stable and close to the selected buffer the “CFM” tag will blink. • Press CFM to confirm calibration. • The instrument stores the calibration value and C F M G L P returns to normal measurement mode. FOUR, THREE OR TWO-POINT CALIBRATION • Proceed as described in “FIVE-POINT CALIBRATION” section. • Press CAL after the fourth, third or second calibration point was confirmed. The instrument will memorize the calibration data and return to measurement mode. ONE-POINT CALIBRATION Two SETUP selectable options are available: “Pnt” and “OFFS”. If the “Pnt” option is selected, the new calibration point overrides an existing one. The adjacent slopes will be reevaluated. If the “OFFS” option is selected, an electrode offset correction is performed. The adjacent slopes will remain unchanged. • Proceed as described in “FOUR, THREE or TWO-POINT CALIBRATION” section. • Press CAL after the first calibration point was confirmed. The instrument will memorize the one-point calibration data and return to measurement mode. Notes: To clear calibration parameters for all uncalibrated buffers starting with current buffer, press CLR. The calibration will continue from the current point. If this procedure is performed while calibrating in the first calibration point, the instrument returns to measurement mode. Press RANGE to toggle between pH buffer, calibration buffer number and temperature R A N G E reading. 13 ENHANCED CALIBRATION MESSAGES The stored calibration history is used to issue error and warning messages during calibration to help ensure the highest accuracy. As electrode aging is normally a slow process, substantial changes from previous calibrations are likely due to a temporary problem with the electrode or buffers. ERROR MESSAGES Error messages appear if one or all of the calibration parameters are out of accepted windows. Calibration can not continue when these errors are displayed. WRONG BUFFER This message appears when the difference between the pH reading and the value of the selected buffer is too large. If this error message is displayed, check if you have selected the proper calibration buffer. CLEAN ELECTRODE This error message indicates a bad electrode condition (offset out of accepted window, or slope under the accepted lower limit). Clean the electrode according to the Cleaning Procedure on page 36 to improve its condition and repeat the calibration. This ensures the removal of film, dirt or deposits on the glass bulb and reference junction. CHECK ELECTRODE alternating with CHECK BUFFER This error message appears when electrode slope exceeds the highest accepted slope limit. You should check your electrode and use fresh buffer. ELECTRODE This message appears if the cleaning procedure performed as a result of the above two messages is found by the instrument to be unsuccessful. 14 Replace the electrode. BUFFER TEMPERATURE This message appears if the temperature of the buffer is outside the defined buffer temperature range. WARNING MESSAGES During calibration, the Calibration Check feature analyzes the electrode calibration history and warns the user when problems have been detected. It is possible to override the warning messages and confirm the calibration but it is not recommended. CLEAN ELECTRODE This warning appears during Calibration Check for the second calibration buffer when the instrument has detected a small variation of offset or both offset and slope parameters. This variation may result from dirt on the electrode. Refer to the electrode cleaning procedure. This ensures the removal of film, dirt or deposits on the glass bulb and reference junction. CLEAN ELECTRODE alternating with CHECK BUFFER This warning appears during Calibration Check in the first calibration buffer as a result of unacceptable offset variation or in the second calibration buffer as a result of unacceptable slope variation. This variation may result from dirt on the electrode or contaminated buffer. Refer to the electrode cleaning procedure or use fresh buffer. CONTAMINATED BUFFER This warning message appears in order to alert that the buffer could be contaminated. Refresh your buffer and continue the calibration procedure. 15 ELECTRODE CONDITION AND ELECTRODE RESPONSE TIME When using an appropriate Hanna Instruments P Type BNC electrode with pin, HI2221 and HI2223 will assess electrode condition and response time during each calibration, the calibration status is displayed for the rest of the day. The response gauge is a function of the stabilization time between the first and second calibration buffers. These gauges reflect electrode performance and should be expected to slowly decrease over the life of the electrode. The condition gauge shows the electrode’s condition at the time of calibration. For a continuous display of electrode condition and response, daily cali‑ bration is necessary. This information can also be viewed in the GLP data. If the instrument is not calibrated, the calibration history was deleted, or it has been calibrated only at one point, the electrode condition and the electrode response gauges will be empty. When the instrument cannot evaluate the electrode response, the response gauge will be empty (pH1.68 or pH12.45 were used). If the electrode is in a very poor condition the first condition segment will blink. If electrode response is very slow the first response segment will blink. 16 pH BUFFER TEMPERATURE DEPENDENCE The temperature has an effect on pH. The calibration buffer solutions are affected by temperature changes to a lesser degree than normal solutions. During calibration the instrument will automatically calibrate to the pH value corresponding to the measured or set temperature. TEMP °C °F 0 32 5 41 10 50 15 59 20 68 25 77 30 86 35 95 40 104 45 113 50 122 55 131 60 140 65 149 70 158 75 167 80 176 85 185 90 194 95 203 1.68 1.67 1.67 1.67 1.67 1.68 1.68 1.68 1.69 1.69 1.70 1.71 1.72 1.72 1.73 1.74 1.76 1.77 1.78 1.79 1.81 4.01 4.01 4.00 4.00 4.00 4.00 4.01 4.02 4.03 4.04 4.05 4.06 4.08 4.09 4.11 4.12 4.14 4.16 4.17 4.19 4.20 pH BUFFERS 6.86 7.01 9.18 6.98 7.13 9.46 6.95 7.10 9.39 6.92 7.07 9.33 6.90 7.05 9.27 6.88 7.03 9.22 6.86 7.01 9.18 6.85 7.00 9.14 6.84 6.99 9.11 6.84 6.98 9.07 6.83 6.98 9.04 6.83 6.98 9.01 6.84 6.98 8.99 6.84 6.98 8.97 6.84 6.99 8.95 6.85 6.99 8.93 6.86 7.00 8.91 6.87 7.01 8.89 6.87 7.02 8.87 6.88 7.03 8.85 6.89 7.04 8.83 10.01 10.32 10.24 10.18 10.12 10.06 10.01 9.96 9.92 9.88 9.85 9.82 9.79 9.77 9.76 9.75 9.74 9.74 9.74 9.75 9.76 12.45 13.38 13.18 12.99 12.80 12.62 12.45 12.29 12.13 11.98 11.83 11.70 11.57 11.44 11.32 11.21 11.10 11.00 10.91 10.82 10.73 During calibration the instrument will display the pH buffer value at 25 ºC. 17 GOOD LABORATORY PRACTICE (GLP) GLP is a set of functions that allows the storage and retrieval of data regarding the maintenance and status of the electrode. All data regarding the last calibration is stored for the user to review when necessary. EXPIRED CALIBRATION These instruments allow the user to set the number of days before the next required calibration. This value can be set from 1 to 7 days. The default setting is OFF (disabled). The “CAL DUE” tags will blink to warn the user that the instrument should be recalibrated. For example, if a 4 days time out has been selected, the instrument will issue the alarm exactly 4 days after the last calibration. If the expiration value is changed (e.g. to 5 days), then the alarm will be immediately recalculated and appear 5 days after the last calibration. Notes: • If the instrument was not calibrated, or if the calibration history was deleted, the “CAL DUE” message will be displayed even if this feature is disabled in the SETUP menu. • If the instrument was calibrated using an electrode with pin and the electrode is changed with an electrode without pin or vice-versa, “CAL DUE” will blink. This feature helps ensure use of a calibrated instrument. pH CALIBRATION DATA Calibration data is stored automatically after a successful calibration. To view the pH calibration data, press the GLP key when the instrument is in pH measuring mode. The instrument will display the time of the last calibration. Use the ARROW keys to scroll through the calibration data: • The time (hh:mm). • The date (yyyy / mm.dd). 18 • The pH calibration offset. • The pH calibration slope in mV/pH normalized to 25 °C (the per‑ centage is referred to the ideal value of 59.16 mV/pH). Note: If you calibrate using electrodes with pin, the electrode condition and response gauges appear while the offset and slope are displayed. • The pH calibration buffers in calibrating order and with the selected resolutions used during calibration. The first pH calibration buffer: The second pH calibration buffer: The third pH calibration buffer: The fourth pH calibration buffer: The fifth pH calibration buffer: Note: The “OLd” message displayed beside the pH value means that this buffer was not used during last calibration. Press and hold down SETUP if you want to see calibration date (or time, if old calibration was performed on the same day as the current calibration). 19 • If “no bUF” message appears on the LCD, the instrument informs you that the calibration was performed with less than five buffers. • Calibration Expiration status: - if disabled, - or the number of days until the calibration alarm will be displayed, - or if expired (7 days ago). • The instrument ID. Notes: • Press GLP to return to measurement mode. • If calibration has not been performed, the instruments display “no CAL” message blinking. 20 LOGGING Up to 100 (HI2221) or 500 (HI2223) logged samples can be stored in memory. LOGGING THE CURRENT DATA To store the current reading into memory, press the LOG key while in measuring mode. The instrument will display the current date (mm.dd) on the primary LCD, the record number on the secondary LCD and the “LOG” tag will blink for a few seconds (see example below: record No. 27 dated July 14): If there are less than 5 memory locations remaining, the record number and the “Lo” message will be displayed to alert the user. If the log space is full, the “FULL LOG” message will be displayed and no more data will be saved. Along with the current measurement, the date, time, mV value, tempera‑ ture and calibration data is stored. If a Hanna Instruments P Type ORP electrode is used, pH information is not stored. VIEW LOGGED DATA Press RCL while in measurement mode to retrieve the stored information. If no data was logged, the instrument displays: The instrument will display the logged measurement value on the primary LCD and the record number on the secondary LCD, along with the “LOG” and “RCL” tags. Note: The “LOG” and “RCL” tags remain on LCD while in memory recall mode. 21 Press the RCL key to return to measurement mode. Use the ARROW keys to scroll through the stored records: Press the RANGE key to view additional data: • The mV value on the primary LCD and the temperature on the secondary LCD. • The year on the primary LCD and the month and day on the secondary LCD. • The hour and minutes on the primary LCD and the record number on the secondary LCD. • The calibration offset on the primary LCD and the “oFFS” message on the secondary LCD. • The calibration slope on the primary LCD and the “SLoP” message on the secondary LCD. Note: On the screens where record number is not displayed press the SETUP key to display the record number. • To delete records press CLR key. The “dEL” message will be displayed on the primary LCD and the selected record on the secondary LCD. The “CFM” and the ”dEL” tags will blink: 22 Press the ARROW keys to change the selected record. To delete all records, press the SETUP key, “ALL” tag will appear on the secondary LCD. Press the CFM key to confirm the deleting of the selected record, or all records. Instrument will display on the primary LCD the “nuLL” message. Notes: • The RANGE key has no effect if “nuLL” record message is displayed on the first LCD line. • You can skip this message by selecting an undeleted record using the ARROW keys. • The instrument optimizes the usage of the memory when it returns to measurement mode after a deleting operation was performed. This will change the record numbers of logged data. During this operation the “ ” tag will blink. • If all the records are deleted, the instrument returns to the measuring mode. • After the LOG key is pressed or “dEL” is confirmed the instrument will display the amount of free log space for about one second (example: 25 records free). 23 SETUP Setup mode allows viewing and modification of the following parameters: • Calibration Expiration Alarm • One-point Calibration Behavior • pH Resolution (HI2223 only) • Current Time (hour & minute) • Current Date (year, month & day) • Beep Status • Instrument ID • Temperature Unit To enter the Setup mode, press the SETUP key while the instrument is in measuring mode. Press SETUP key to exit SETUP mode. Select a parameter with the ARROW keys. Press the CAL key to change a parameter value. The selected parameter will start blinking. Press the RANGE key to toggle between the displayed parameters. Press the ARROW keys to increase or decrease the displayed value. Press the CFM key to save the modified value or the CAL key to escape without saving. Press the ARROW keys to select the next/previous parameter. CALIBRATION EXPIRATION ALARM Press the CAL key when the calibration expiration is displayed. Calibration time out (“OFF” or “1” to “7” days) and “CFM” will begin blinking. Press the ARROW keys to change the calibration expiration value. Press the CFM key to save the modified calibration expiration value or press the CAL key to cancel without saving the calibration expiration. ONE-POINT CALIBRATION BEHAVIOR Press CAL when “1 Pnt” message is displayed on the secondary LCD. One of the two options (“Pnt” or “OFFS”) and “CFM” will start blinking (see pH CALIBRATION, ONE-POINT CALIBRATION for details, page 12). Press the ARROW keys to toggle between “Pnt” and “OFFS” options. 24 Press CFM to save the behavior for one-point calibration. Press CAL to escape without saving. pH RESOLUTION (HI2223 only) Press CAL when “rESo” message is displayed on the secondary LCD. The set resolution (“0.01” or ”0.001”) and “CFM” will start blinking. Press the ARROW keys to toggle between 0.01 and 0.001 options. Press CFM to save the modified value. Press CAL to escape without saving. CURRENT TIME Press the CAL key when the current time is displayed. The hour and “CFM” will start blinking. Press the ARROW keys to change the hour. Press the RANGE key. The minutes and “CFM” will start blinking. Press the ARROW keys to change the displayed value. Press the CFM key to save the modified value or press the CAL key to escape without saving. CURRENT DATE Press the CAL key when the current date is displayed. The year and “CFM” will start blinking. Press the ARROW keys to change the year. Press the RANGE key. The month and “CFM” will start blinking. Press the ARROW keys to change the month. 25 Press the RANGE key. The day and “CFM” will start blinking. Press the ARROW keys to change the day. Press the CFM key to save the modified value or press the CAL key to escape without saving. BEEP STATUS Press CAL when the beep status is displayed. Beep status (“On” or “OFF”) and “CFM” will start blinking. Press the ARROW keys to change the beep status (On or OFF). Press CFM to save the modified beep status. Press CAL to escape without saving. When enable, beep sounds as a short beep every time a key is pressed or when the calibration can be confirmed. A long beep alerts that the pressed key is not active or a wrong condition is detected while in calibration. INSTRUMENT ID Press the CAL key when “InId” is displayed. The instrument ID (“0000” to “9999”) and “CFM” will start blinking. Press the ARROW keys to change the instrument ID value. Press the CFM key to save the modified instrument ID value or press the CAL key to cancel without saving the instrument ID. Note: The instrument ID is downloaded to a PC as part of a logged data set to identify its origin. TEMPERATURE UNIT Press CAL when “tEnP” is displayed. The temperature unit and “CFM” will start blinking. Press the ARROW keys to change the option. Press CFM to save the modified temperature unit. Press CAL to escape without saving. 26 TEMPERATURE CALIBRATION (for technical personnel only) All the instruments are factory calibrated for temperature. Hanna Instruments’ temperature probes are interchangeable and no temperature calibration is needed when they are replaced. If the temperature measurements are inaccurate, temperature recalibra‑ tion should be performed. For an accurate recalibration, contact your local Hanna Instruments, or follow the instructions below. • Prepare a vessel containing ice and water and another one containing hot water (around 50 ºC). Place insulation material around the vessels to minimize temperature changes. • Use a calibrated thermometer with a resolution of 0.1 ºC as a reference thermometer. • With the instrument off, press and hold down the CFM & SETUP keys, then power on the instrument. The “CAL” tag will appear and the secondary LCD will show “0.0 ºC“. • Submerse the temperature probe in the vessel with ice and water as near as possible to the reference thermometer. Allow a few seconds for the probe to stabilize. • Use the ARROW keys to set the reading on the secondary LCD to that of ice and water, measured by the reference thermometer. When the reading is stable and close to the selected calibration point, “READY” tag will appear and “CFM” tag will blink. C F M G L P • Press CFM to confirm. The secondary LCD will show “50.0 ºC“. • Submerse the temperature probe in the second vessel as near as possible to the reference thermometer. Allow a few seconds for the probe to stabilize. • Use the ARROW keys to set the reading on the secondary LCD to that of the hot water. 27 • When the reading is stable and close to the selected calibration point, “READY” tag will appear and “CFM” tag will blink. • Press CFM to confirm. The instrument returns to measurement mode. C F M G L P Note: If the reading is not close to the selected calibration point, “WRONG” tag will blink. Change the temperature probe and restart calibration. 28 mV CALIBRATION (for technical personnel only) All the instruments are factory calibrated for mV. Hanna Instruments’ ORP electrodes are interchangeable and no mV calibration is needed when they are replaced. If the mV measurements are inaccurate, mV recalibration should be performed. For an accurate recalibration, contact your local Hanna Instruments Office. A two-point calibration can be performed at 0.0 mV and 1800.0 mV. • Attach to the BNC connector a mV simulator with an accuracy of ±0.1 mV. • With the instrument off, press and hold down the CAL & ºC keys, then power on the instrument. The “CAL” tag will appear and the secondary LCD will show “0.0 mV“. • Set 0.0 mV on the simulator. When the reading is stable and close to the selected calibration point, “READY” tag will appear and “CFM” tag will blink. • Press CFM to confirm. The secondary LCD will display “1800 mV“. • Set 1800.0 mV on the simulator. When the reading is stable and close to the selected calibration point, “READY” tag will appear and “CFM” tag will blink. • Press CFM to confirm. The instrument returns to measurement mode. Note: If the reading is not close to the selected calibration point, “WRONG” tag will blink. Verify calibration condition or contact your vendor if you can not calibrate. 29 PC INTERFACE Data transmission from the instrument to the PC can be done with the HI92000 Windows® compatible software (optional). HI92000 also offers graphing and an on-line help feature. Data can be exported to the most popular spreadsheet programs for further analysis. To connect your instrument to a PC, use a standard USB cable connector. Make sure that your instrument is switched off and plug one connector to the instrument’s USB socket and the other to the USB port of your PC. To allow our users access to the latest version of Hanna Instruments PC compatible software, we made the products available for download at http://software.hannainst.com. Select the product code and click Download Now. After download is complete, use the setup.exe file to install the software. Note: If you are not using Hanna Instruments HI92000 software, please see the following instructions. SENDING COMMANDS FROM PC It is also possible to remotely control the instrument with any terminal program. Use a standard USB cable to connect the instrument to a PC, start the terminal program and set the communication options as follows: 8, N, 1, no flow control, 9600 baud rate. COMMAND TYPES To send a command to the instrument, follow the next scheme: <command prefix> <command> <CR> where: <command prefix> is a 16 ASCII character <command> is the command code. Note: Either small or capital letters can be used. SIMPLE COMMANDS Is equivalent to pressing RANGE RNG CAL Is equivalent to pressing CAL CFM Is equivalent to pressing CFM UPC Is equivalent to pressing the UP arrow key Is equivalent to pressing the DOWN arrow key DWC LOG Is equivalent to pressing LOG RCL Is equivalent to pressing RCL SET Is equivalent to pressing SETUP CHR xx Change the instrument’s range according to the parameter‘s value (xx): • xx=00 pH value/0.001 resolution (HI2223 only) • xx=01 pH range/0.01 resolution • xx=03 mV range 30 The instrument will answer for these commands with: <STX> <answer> <ETX> where: <STX> is 02 ASCII code character (start of text) <ETX> is 03 ASCII code character (end of text) <answer>: <ACK> is 06 ASCII code character (recognized command) <NAK> is 21 ASCII code character (unrecognized command) <CAN> is 24 ASCII code character (corrupted command) COMMANDS REQUIRING AN ANSWER The instrument will answer for these commands with: <STX> <answer> <checksum> <ETX> where the checksum is the bytes sum of the answer string sent as 2 ASCII characters. All the answer messages are with ASCII characters. Causes the instrument to send a complete set of readings RAS according to the current range: • pH, temperature and mV reading on pH range. • mV and temperature reading on mV range The answer string contains: • Meter mode (2 chars): • 00 - pH value (0.001 resolution) • 01 - pH range (0.01 resolution) • 03 - mV range • Meter status (2 chars of status byte): represents an 8 bit hexadecimal encoding. • 0x10 - temperature probe is connected • 0x01 - new GLP data available • 0x02 - new SETUP parameter • Reading status (2 chars): R - in range, O - over range, U - under range. First character corresponds to the pH range reading. (Not for Hanna Instruments ORP electrodes with pin.) Second character corresponds to mV reading. • pH reading on pH range only - 7 ASCII chars, including sign and decimal point. (Not for Hanna Instruments ORP electrodes with pin.) • mV reading - 7 ASCII chars, including sign and decimal point. • Temperature reading - 8 ASCII chars, with sign and two decimal points, always in ºC. 31 Requests the instrument’s model name and firmware code (16 ASCII chars). GLP Requests the calibration data record. The answer string contains: • GLP status (1 char): represents a 4 bit hexadecimal encoding. • 0x01 - pH calibration available • pH calibration data (if available), which contains: • the number of calibrated buffers (1 char) • the offset, with sign and decimal point (7 chars) • the average of slopes, with sign and decimal point (7 chars) • the calibration time, yymmddhhmmss (12 chars) • buffers information (for each buffer) • type (1 char): 0 - standard (always 0) • status (1 char): N (new) - calibrated in last calibration; O (old) - from an old calibration. • warnings during calibration (2 chars): • 00 - no warnings • 01 - clean electrode • 04 - clean electrode and check buffer • 05 - contaminated buffer. • buffer value, with sign and decimal point (7 chars). • calibration time, yymmddhhmmss (12 chars). • electrode condition, with sign (3 chars). The “-01” code means not calculated. • electrode response with sign (3 chars). The “-01” code means not calculated. PAR Requests the setup parameters setting. The answer string contains: • Instrument ID (4 chars) • Calibration alarm time-out (2 chars) • SETUP information (2 chars): 8 bit hexadecimal encoding. • 0x01 - beep ON (else OFF) • 0x04 - degrees Celsius (else degrees Fahrenheit) • 0x08 - Offset calibration (else Point calibration) MDR 32 NSL Requests the number of logged samples (4 chars). LODxxx Requests the xxxth record logged data. LODALL Requests all Log on demand data. The answer string contains: • pH resolution (2 chars): 00 - pH0.001 resolution, 01 - pH0.01 resolution • pH reading status (1 char): R - in range, O - over range, U - under range • pH reading with sign and decimal point (7 chars) • Temperature reading sign and decimal point in ºC (7 chars) • mV reading status (1 char - R, O, U) • mV reading with sing and decimal point (7 chars) • the logged time, yymmddhhmmss (12 chars) • the calibration offset with sign and decimal point (7 chars) • the average of slopes with sign and decimal point (7 chars) • temperature probe presence (1 char) Errors:• “Err3” is sent if the Log on demand is empty. • “Err4” is sent if the requested set parameter is not available. • “Err5” is sent if an argument of the command is not correct. • “Err6” is sent if the requested range is not available. • “Err7” is sent if the instrument is in logging mode. • “Err8” is sent if the instrument is not in measurement mode. • Invalid commands will be ignored. 33 ELECTRODE CONDITIONING AND MAINTENANCE PREPARATION PROCEDURE Remove the protective cap of the pH electrode. DO NOT BE ALARMED IF SALT DEPOSITS ARE PRESENT. This is normal with electrodes. They will disappear when rinsed with water. During transport, tiny bubbles of air may form inside the glass bulb affect‑ ing proper functioning of the electrode. These bubbles can be removed by “shaking down” the electrode as you would do with a glass thermometer. If the bulb and/or junction is dry, soak the electrode in HI70300 or HI80300 Storage Solution for at least one hour. 34 For refillable electrodes: If the filling solution (electrolyte) is more than 2½ cm (1”) below the fill hole, add HI7082 or HI8082 3.5M KCl Electrolyte Solution for double junction or HI7071 or HI8071 3.5M KCl+AgCl Electrolyte Solution for single junction electrodes. For faster response, unscrew the fill hole screw during measurements. For AMPHEL® electrodes: If the electrode does not respond to pH changes, the battery is run down and the electrode should be replaced. MEASUREMENT Rinse the electrode tip with distilled water. Submerse the tip 3 cm (1¼”) in the sample and stir gently for a few seconds. For a faster response and to avoid cross-contamination of the samples, rinse the electrode tip with a few drops of the solution to be tested, before taking measurements. STORAGE PROCEDURE 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. Replace the solution in the protective cap with a few drops of HI70300 or HI80300 Storage Solution or, in its absence, Filling Solution (HI7071 or HI8071 for single junction and HI7082 or HI8082 for double junction electrodes). Follow the Preparation Procedure before taking measurements. Note: NEVER STORE THE ELECTRODE IN DISTILLED OR DEIONIZED WATER. PERIODIC MAINTENANCE Inspect the electrode and the cable. The cable used for connection to the instrument must be intact and there must be no points of broken insulation on the cable or cracks on the electrode stem or bulb. Connectors must be perfectly clean and dry. If any scratches or cracks are present, replace the electrode. Rinse off any salt deposits with water. For refillable electrodes: Refill the reference chamber with fresh electrolyte (HI7071 or HI8071 for single junction and HI7082 or HI8082 for double junction electrodes). Allow the electrode to stand upright for 1 hour. Follow the Storage Procedure above. 35 CLEANING PROCEDURE • General Soak in Hanna Instruments HI7061 or HI8061 General Cleaning Solution for approximately ½ hour. • Protein Soak in Hanna Instruments HI7073 or HI8073 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 or HI8077 Oil and Fat Cleaning Solution. IMPORTANT: After performing any of the cleaning procedures, rinse the electrode thoroughly with distilled water, refill the reference chamber with fresh electrolyte (not necessary for gel-filled electrodes) and soak the electrode in HI70300 or HI80300 Storage Solution for at least 1 hour before taking measurements. 36 TROUBLESHOOTING GUIDE SYMPTOMS Slow response/ excessive drift. Readings fluctuate up and down (noise). The meter does not accept the buffer solution for calibration. If the display shows: “pH” and “ -2.00” or “16.00” blinking. PROBLEM SOLUTION Dirty pH electrode. Clean the electrode and then soak the tip in HI7061 or HI8061 for 30 minutes. Clogged/dirty junc‑ Clean the electrode. tion. Low electrolyte Refill with fresh solution (for level (refillable refillable electrodes only). electrodes only). Check cable and connectors. Dirty electrode or Follow the cleaning contaminated buffer. procedure. If still no results, replace the electrode. Replace buffer. Out of range in the a) Verify that the electrode pH scale. is connected. b) Verify that the shipping cap has been removed. c) Recalibrate the meter. d) Make sure the pH sample is in the specified range. e) Check electrolyte level and general state of the electrode. Out of range in the Verify that the electrode is mV scale. connected. If the display shows: “mV” and “-2000” or “2000” blinking. The meter does not Broken temperature Replace the temperature work with the probe. Wrong probe. temperature probe. temperature probe used. The meter fails to Broken pH electrode. Replace the electrode. calibrate or gives faulty readings. At startup the meter One of the keys is Check the keyboard or displays all LCD stuck. contact the vendor. tags permanently. “Err xx” error Internal error. Power off the meter and message displayed. then power it on. If the error persists, contact the vendor. 37 TEMPERATURE CORRELATION FOR pH SENSITIVE GLASS The resistance of glass electrodes partially depends on the temperature. The lower the temperature, the higher the resistance. It takes more time for the reading to stabilize if the resistance is higher. In addition, the response time will suffer to a greater degree at temperatures below 25 ºC. Since the resistance of the pH electrode is in the range of 50 – 200 Mohm, the current across the membrane is in the pico Ampere range. Large currents can disturb the calibration of the electrode for many hours. For these reasons high humidity environments, short circuits and static discharges are detrimental to a stable pH reading. The pH electrode’s life also depends on the temperature. If constantly used at high temperatures, the electrode life is drastically reduced. Typical Electrode Life 1 – 3 years Ambient Temperature 90 ºC Less than 4 months 120 ºC Less than 1 month Alkaline Error High concentrations of sodium ions interfere with readings in alkaline solutions. The pH at which the interference starts to be significant depends upon the composition of the glass. This interference is called alkaline error and causes the pH to be underestimated. Hanna Instruments’ glass formulations have the indicated characteristics. Sodium Ion Correction for the Glass at 20-25 °C Concentration pH Error 13.00 0.10 13.50 0.14 0.1 Mol L-1 Na+ 14.00 0.20 12.50 0.10 13.00 0.18 -1 + 1.0 Mol L Na 13.50 0.29 14.00 0.40 38 ACCESSORIES pH BUFFER SOLUTIONS HI70004P pH4.01 Buffer Sachets, 20 mL, 25 pcs. HI70007P pH7.01 Buffer Sachets, 20 mL, 25 pcs. HI70010P pH10.01 Buffer Sachets, 20 mL, 25 pcs. HI7001L pH1.68 Buffer Solution, 500 mL HI7004L pH4.01 Buffer Solution, 500 mL HI7006L pH6.86 Buffer Solution, 500 mL HI7007L pH7.01 Buffer Solution, 500 mL HI7009L pH9.18 Buffer Solution, 500 mL HI7010L pH10.01 Buffer Solution, 500 mL HI8004L pH4.01 Buffer Solution in FDA approved bottle, 500 mL HI8006L pH6.86 Buffer Solution in FDA approved bottle, 500 mL HI8007L pH7.01 Buffer Solution in FDA approved bottle, 500 mL HI8009L pH9.18 Buffer Solution in FDA approved bottle, 500 mL HI8010L pH10.01 Buffer Solution in FDA approved bottle, 500 mL ELECTRODE STORAGE SOLUTIONS HI70300L Storage Solution, 500 mL HI80300L Storage Solution in FDA approved bottle, 500 mL ELECTRODE CLEANING SOLUTIONS HI70000P Electrode Rinse Sachets, 20 mL, 25 pcs. HI7061L General Cleaning Solution, 500 mL HI7073L Protein Cleaning Solution, 500 mL HI7074L Inorganic Cleaning Solution, 500 mL HI7077L Oil & Fat Cleaning Solution, 500 mL HI8061L General Cleaning Solution in FDA approved bottle, 500 mL HI8073L Protein Cleaning Solution in FDA approved bottle, 500 mL HI8077L Oil & Fat Cleaning Solution in FDA approved bottle, 500 mL ELECTRODE REFILL ELECTROLYTE SOLUTIONS HI7071 3.5M KCl + AgCl Electrolyte, 4x30 mL, for single junction electrodes HI7072 1M KNO3 Electrolyte, 4x30 mL HI7082 3.5M KCl Electrolyte, 4x30 mL, for double junction electrodes HI8071 3.5M KCl + AgCl Electrolyte in FDA approved bottle, 4x30 mL, for single junction electrodes HI8072 1M KNO3 Electrolyte in FDA approved bottle, 4x30 mL HI8082 3.5M KCl Electrolyte in FDA approved bottle, 4x30 mL, for double junction electrodes. ORP PRETREATMENT SOLUTIONS HI7091L Reducing Pretreatment Solution, 500 mL HI7092L Oxidizing Pretreatment Solution, 500 mL 39 pH ELECTRODES All electrodes with part numbers ending in P are supplied with a BNC and pin connector and 1 m (3.3’) cable, as shown below. HI1043P; Use: strong acid/alkali. Glass-body, double junction, refillable, combination pH electrode. HI1053P; Use: emulsions. Glass-body, triple ceramic, conic shape, refillable, combination pH electrode. HI1131P; Use: general purpose. Glass-body, double junction, refillable, combination pH electrode. HI1083P; Use: biotechnology, micro titration. Glass-body, micro, Viscolene, nonrefillable, combination pH electrode. 40 ORP ELECTRODES HI3131P; Use: titration. Glass-body, refillable, combination platinum ORP electrode. Consult the Hanna Instruments General Catalog for more electrodes with BNC and pin connectors. EXTENSION CABLE FOR SCREW-TYPE ELECTRODES (SCREW TO BNC ADAPTER) HI7855/1 Extension cable 1 m (3.3’) long HI7855/3 Extension cable 3 m (9.9’) long 41 OTHER ACCESSORIES Voltage adapter from 115 VAC to 12 VDC HI710005 (USA plug) Voltage adapter from 230 VAC to 12 VDC HI710006 (European plug) Voltage adapter from 240 VAC to 12 VDC HI710012 (UK plug) Voltage adapter from 230 VAC to 12 VDC HI710013 (South African plug) Voltage adapter from 230 VAC to 12 VDC HI710014 (Australian plug) HI76404N Electrode holder pH and ORP electrode simulator with 1 m (3.3’) coaxial HI8427 cable ending in female BNC connectors pH and ORP electrode simulator with LCD and 1 m HI931001 (3.3’) coaxial cable ending in female BNC connectors HI7662 Temperature probe with 1 m (3.3’) cable HI92000 Windows® compatible software. Windows® is registered Trademark of “Microsoft Co.” 42 CERTIFICATION All Hanna Instruments conform to the CE European Directives. Disposal of Electrical & Electronic Equipment. The product should not be treated as household waste. Instead hand it over to the appropriate collection point for the recycling of electrical and electronic equipment which will conserve natural resources. Disposal of waste batteries. This product contains batteries, do not dispose of them with other household waste. Hand them over to the appropriate collection point for recycling. Ensuring proper product and battery disposal prevents potential negative consequences for the environment and human health. For more information, contact your city, your local household waste disposal service, the place of purchase or go to www.hannainst.com. RECOMMENDATIONS FOR USERS Before using this product, make sure it is entirely suitable for your specific application and for the environment in which it is used. Any variation introduced by the user to the supplied equipment may degrade the meters' performance. For yours and the meter's safety do not use or store the meter in hazardous environments. WARRANTY HI2221 and HI2223 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 accidents, misuse, tampering or lack of prescribed maintenance is not covered. If service is required, contact your local Hanna Instruments Office. If under warranty, report the model number, date of purchase, serial number and the nature of the problem. If the repair is not covered by the warranty, you will be notified of the charges incurred. If the instrument is to be returned to Hanna Instruments, first obtain a Returned Goods Authorization number from the Technical Service department and then send it with shipping costs prepaid. When shipping any instrument, make sure it is properly packaged for complete protection. Hanna Instruments reserves the right to modify the design, construction or appearance of its products without advance notice. 43 World Headquarters Hanna Instruments Inc. Highland Industrial Park 584 Park East Drive Woonsocket, RI 02895 USA www.hannainst.com MAN2223 06/19 Printed in ROMANIA 44 ">

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