Instruction Manual HI 3512 Two Channels pH/ORP/ISE, EC/TDS/NaCl/Resistivity, Temperature Bench Meter w w w. h a n n a i n s t .
Dear Customer, Thank you for choosing a Hanna Instruments product. Please read this instruction manual carefully before using this instrument. This manual will provide you with the necessary information for correct use of this instrument, as well as a precise idea of their versatility. If you need additional technical information, do not hesitate to e-mail us at tech@hannainst.com or view our worldwide contact list at www.hannainst.com.
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, notify your Dealer or the nearest Hanna Customer Service Center. Each instrument is supplied with: • HI 1131B Glass body combination double-junction pH electrode • HI 76310 Four Ring Conductivity Probe with built-in temperature • HI 7662-T stainless steel Temperature Probe with 1 m (3.3') Cable • HI 70004 pH 4.
• Extended temperature range on pH channel from –20 to 120 ºC (–4 to 248 ºF), using HI 7662-T interchangeable temperature probes. EC channel: • 7 memorized standards (0.00 µS/cm, 84.0 µS/cm, 1.413 mS/cm, 5.00 mS/cm, 12.88 mS/cm, 80.0 mS/cm and 111.8 mS/cm) for calibration. • EC calibration up to two calibration points. • Messages on the graphic LCD for an easy and accurate calibration. • Diagnostic features to alert the user when the electrode needs cleaning. • User selectable “Out of cal. range” warning.
FUNCTIONAL DESCRIPTION Front view 1) Liquid Crystal Display (LCD) 2) Function keys 3) CHANNEL keys to toggle between channels (Ch1 - pH, Ch2 - EC) / keys to manually increase/decrease the parameters or to scroll 4) between the parameter list 5) MENU key, to change the function key at the bottom of the display 6) RANGE key, to switch between pH, mV and ISE range (Ch1); EC, Resitivity, TDS and Salinity range (Ch2) 7) HELP key to enter/exit contextual help 8) CAL key, to enter calibration mode 9) ESC to escap
Rear view 10) 11) 12) 13) 14) 15) 16) ON/OFF switch. Power adaptor socket. USB connector. DIN connector for EC probe. BNC electrode connector for pH/ORP, ISE electrode. Temperature socket for pH/ORP, ISE channel. Reference electrode connector for pH/ORP, ISE channel.
SPECIFICATIONS –2.0 to 20.0 pH –2.00 to 20.00 pH –2.000 to 20.000 pH ±2000.0 mV Range 1.00 E-7 to 9.99 E10 conc. –20.0 to 120.0 ºC (4.0 to 248.0 ºF) Channel 1 000.1 pH 00.01 pH 0.001 pH Resolution 0.1 mV 3 digits 0.01, 0.1, 1, 10 conc. 0.1 ºC (0.1 ºF) ±0.01 pH ±0.002 pH Accuracy @ 20 ºC / 68ºF ±0.2 mV ±0.5% of reading (monovalent ions) ±1% of reading (divalent ions) ±0.2 ºC (±0.
000 to 400 mS/cm (shows values up to 1000 mS/cm) Actual conductivity 1000 mS/cm 0.001 to 9.999 µ S/cm 10.00 to 99.99 µ S/cm 100.0 to 999.9 µ S/cm 1.000 to 9.999 mS/cm 10.00 to 99.99 mS/cm .100.0 to 0999.9 mS/cm 1000 mS/cm (autoranging) Range EC 0.001 00.01 000.1 0.001 00.01 000.1 000.1 Resolution µ S/cm µ S/cm µ S/cm mS/cm mS/cm mS/cm mS/cm ±1% of reading (±0.01 µS/cm or 1 digit whichever greater) excluding probe error Accuracy 01.0 to 199.9 ohms .100 to 1.999 ohms 1.00 to 19.99 Kohms 10.0 to 199.
Range Salinity Temperature Channel 2 % NaCl: 0.0 to 400.0 % Resolution 0.1 % Accuracy ±1% of reading excluding probe error Range -20.0 to 120.0 °C Resolution 0.1 °C Accuracy ±0.2 °C (excluding probe error) Automatic up to 2 points with 7 memorized standards E C Calibration (0.00 µS/cm, 84.0 µS/cm, 1.413 mS/cm, 5.00 mS/cm, 12.88 mS/cm, 80.0 mS/cm, 111.8 mS/cm) Cell constant setup 0.010 to 10.000 NaCl Calibration Max.
OPERATIONAL GUIDE POWER CONNECTION Plug the 12 Vdc adapter into the power supply socket. Note: This instrument use non volatile memory to retain the pH, mV, Ion, EC, NaCl calibrations and all other settings, when unplugged. ELECTRODE AND PROBE CONNECTIONS For pH, ORP or ISE measurements connect a combination pH/ORP/ISE electrode to the BNC connector located on the rear panel of the instrument.
Allow for the electrode to adjust and reading to stabilize (hourglass symbol turns off). On the pH screen are displayed: • pH reading with the selected resolution. • Temperature reading in the selected unit (ºC or ºF). • Temperature compensation mode (MTC - manual, ATC - automatic). While in MTC mode the indicate that the temperature can be manually changed using ARROW keys. • Electrode condition during the calibration day. • The buffers used in last pH calibration (if feature is enabled in SETUP).
ORP MEASUREMENTS To perform ORP measurements, connect an ORP electrode (see ACCESSORIES section) to the instrument and turn it ON. If necessary, enter the mV mode by pressing RANGE until the display changes to mV. Submerse the ORP electrode 3 cm (1¼”) into the 3 cm sample to be tested and wait a few seconds for the reading to stabilize. Measurements are displayed with 0.1 mV resolution. The “ATC” (or “MTC”) message is turned off because mV readings are not temperature compensated.
Submerse the ISE electrode tip 3 cm (1¼”) into the sample to be tested and wait for the reading to stabilize. The ISE reading will be displayed along with the current temperature reading. 3 cm The ”ATC“(or “MTC”) message is turned off because ppm readings are not temperature compensated. In order to take accurate ISE measurements, make sure that the appropriate ISE electrode type and ISE unit were set in SETUP menu and the instrument was calibrated (see ISE CALIBRATION for details, page 29).
EC range The conductivity range is from 0 to 400 mS/cm . The actual conductivity range (the uncompensated conductivity) is up to 1000 mS/cm. The instrument will display conductivity readings up to 1000 mS/cm. Note: The symbol in front of the temperature reading means that the temperature can be entered by the user (“Manual” option selected in SETUP). Resistivity range The reciprocal of the conductivity of a material is the resistivity.
AUTO-RANGING EC CHANNEL The EC, Resistivity and TDS scales are auto-ranging. The meter automatically sets the scale with the highest possible resolution. By pressing Lock, the auto-ranging feature is disabled and the current range is frozen on the LCD. The “Range: Locked” message is displayed. To restore the auto-ranging option press AutoRng functional key again. The auto-ranging mode is also disabled by selecting a “fixed range” in the SETUP menu.
TEMPERATURE COMPENSATION EC CHANNEL The conductivity of a solution with a specific electrolyte concentration changes with temperature. The relationship of the change in conductivity as a function of temperature is described by a solution’s temperature coefficient. This coefficient varies with each solution and is user selectable (see SETUP mode). Two selectable temperature sources are available: reading directly from the sensor inside the probe or manual entry.
CONDUCTIVITY VERSUS TEMPERATURE CHART The conductivity of an aqueous solution is the measure of its ability to carry an electrical current by means of ionic motion. The conductivity invariably increases with increasing temperature. It is affected by the type and number of ions in the solution and by the viscosity of the solution itself. Both parameters are temperature dependent.
USER CALIBRATION To enter User Calibration screen press CAL key while in pH/Rel mV/ISE range (pH channel) or EC/Salinity range (EC channel). From EC range Press the corresponding functional key to enter: • EC user calibration. • Ch2 temperature user calibration. From pH range Press the corresponding functional key to enter: • pH user calibration. • Ch1 temperature user calibration.
p H CALIBRATION It is recommended to calibrate the instrument frequently, especially if high accuracy is required. The pH range should be recalibrated: • Whenever the pH electrode is replaced. • At least once a week. • After testing aggressive chemicals. • When calibration alarm time out is expired - “CAL DUE” blinks (if feature is enabled in SETUP). • If “Out of cal.
FIVE-POINT CALIBRATION • Immerse the pH electrode and the temperature probe approximately 3 cm (1¼”) into a buffer solution of your choice (pH 1.68, 4.01, 6.86, 7.01, 9.18, 10.01, 12.45 or a custom buffer) 3 cm and stir the buffer gently. The temperature probe should be close to the pH electrode. • Enter pH calibration. The instrument will display the measured pH, the LCD first expected buffer and the temperature reading. • If necessary, press the ARROW keys to select a different buffer value.
• When the reading is stable and close to the selected buffer, the Confirm function key is displayed. • Press Confirm to confirm calibration. • The calibrated value and the third expected buffer value will be displayed. • After the second calibration point is confirmed, immerse the pH electrode and the temperature probe approximately 3 cm (1¾”) into a third buffer solution and stir gently. The temperature probe should be close to the pH electrode.
FOUR, THREE or TWO-POINT CALIBRATION • Proceed as described in “FIVE-POINT CALIBRATION” section. • Press ESC after the appropriate accepted calibration point. The instruments will return to calibration screen and will memorize the calibration data. SINGLE-POINT CALIBRATION There are two selectable options for a single-point calibration: Replace and Offset. This option is configured in SETUP mode under the parameter First Point Mode.
Wrong buffer The calibration cannot be confirmed. The pH reading is not close to the selected buffer. Select another buffer using the ARROW keys or change the buffer. “Electrode Dirty/Broken“ alternatively with “Buffer Contaminated“. The calibration cannot be confirmed. The offset of the electrode is not in the accepted range. Check if the electrode is broken or clean it following the CLEANING PROCEDURE (see page 74). Check the quality of the buffer. If necessary, change the buffer.
Wrong old slope An inconsistency between new and previous (old) calibration is detected. Clear old calibration parameters and initiate calibration from the current point. The instrument will keep all confirmed values during current calibration. Note: For single-point calibration the electrode condition is not displayed in the measurement screen. Each time a buffer is confirmed, the new calibration parameters replace the older calibration parameters of the corresponding buffer.
Use the ARROW keys to change the buffer value. Press Accept to accept new value or ESC to exit mode. Note: Custom buffer value can be adjusted within a ±1.00 pH window, around the set value. WORKING WITH MILI pH BUFFERS HANNA millesimal pH buffers are ± 0.002 pH buffers formulated to correspond to nominal pH values. (1.000, 2.000, 3.000, 4.010, 5.000, 6.000, 7.010, 8.000, 9.000, 10.010, 11.000, 12.000, 13.000 and 9 that fall between).
The instrument will display “Calibration Cleared” and the instrument returns to measuring mode. ELECTRODE CONDITION The display is provided with an icon, and a numeric value (unless the feature is disabled) which gives an indication of the electrode status after calibration. The indication remains active until the end of the calibration day. Note: The electrode condition is evaluated only if current calibration includes at least two standard buffers.
p H BUFFER TEMPERATURE DEPENDENCE Temperature has an effect on pH buffers. During calibration the instrument will automatically calibrate to the pH value corresponding to the measured or set temperature. TEMP pH BUFFERS ºC ºF 1. 68 4. 01 6. 86 7. 01 9. 18 10. 01 12. 45 0 32 1.67 4.01 6.98 7.13 9.46 10.32 13.38 5 41 1.67 4.00 6.95 7.10 9.39 10.24 13.18 10 50 1.67 4.00 6.92 7.07 9.33 10.18 12.99 15 59 1.67 4.00 6.90 7.05 9.27 10.12 12.80 20 68 1.68 4.00 6.88 7.
RELATIVE m V CALIBRATION The relative mV value calibration may be used to perform a single point calibration with an ORP standard or remove the contribution of the reference electrode to display mV equivalent to a SHE. • Press CAL when the instrument is in Relative mV measurement mode. The relative mV value and the temperature values are displayed. • Use the ARROW keys if you want to change the displayed relative mV value.
I S E CALIBRATION It is recommended to calibrate the instrument frequently, especially if high accuracy is required. The ISE range should be recalibrated: • Whenever the ISE probe or ion charge is changed. • At least once a day. • After testing aggressive chemicals. • When calibration alarm time out is expired- “CAL DUE” warning blinks (if feature is enabled). Follow instructions for the individual electrode. Due to electrode conditioning time, the electrode must be kept immersed a few seconds to stabilize.
FIVE-POINT CALIBRATION Use part of this procedure for 2, 3 or 4 point calibration. Press ESC. • Immerse the ISE electrode approximately 2 cm (¾”) into the less concentrated standard 2 cm solution and stir gently. • Press CAL. The primary LCD will displays the ion concentration in the selected unit or “----” if not calibrated and first standard value. • If necessary, press the ARROW keys to select a different standard value. • The “ ” tag will blink on the LCD until the reading is stable.
• The calibrated value and the third expected standard value will be displayed. • After the second calibration point is confirmed, immerse the ISE electrode approximately 2 cm (¾”) into the third calibration solution. • If necessary, press the ARROW keys to select a different standard value. • The “ ” tag will blink on the LCD until the reading is stable. • When the reading is stable and close to the selected standard, the Confirm function key is displayed. • Press Confirm to confirm calibration.
ERROR SCREENS Wrong standard The calibration cannot be confirmed. Verify that the correct standard is selected. The message appears if mV input is out of ±2000 mV range. Wrong slope The calibration cannot be confirmed. This message is displayed if slope is out of the accepted range. Slope under accepted value (30 % default slope). Verify that the correct standard is selected. Slope over accepted value (130 % default slope).
EC CALIBRATION It is recommended to calibrate the instrument frequently, especially if high accuracy is required. The EC range should be recalibrated: • Whenever the EC electrode is replaced. • At least once a week. • After testing aggressive chemicals. • When calibration alarm time out is expired - “CAL DUE” blinks (if feature is enabled in SETUP). • If “Out of cal.
• Press CAL from EC range to enter calibration mode. • Leave the probe in the air and press EC. The instrument will display the measured EC on the LCD, first expected standard and the temperature reading. • If necessary, press the ARROW keys to select a different standard value. • The “ ” tag will blink on the LCD until the reading is stable. • When the reading is stable and close to the selected buffer, Confirm functional key is displayed. • Press Confirm to confirm first point.
• When the reading is stable and close to the selected standard, the Confirm functional key is displayed. • Press Confirm to confirm calibration. ERROR SCREENS Wrong standard The calibration cannot be confirmed. The EC reading is not close to the selected standard or the temperature is out of the 0 - 60 °C window. Select another standard using the ARROW keys or change the temperature value. CLEAR CALIBRATION Press Clear functional key when displayed to clear old calibrations.
• Rinse the probe with some of the calibration solution or deionized water. Immerse the probe into HI 7037L solution. Tap the probe repeatedly to remove any air bubbles that may be trapped inside the sleeve. • The “ ” tag will blink on the LCD until the reading is stable. • When the reading is stable, the Confirm functional key is displayed. Press Confirm to confirm calibration. • The instrument returns to measurement mode.
GOOD LABORATORY PRACTICE (GLP) GLP is a set of functions that allows storage and retrieval of data regarding the maintenance and status of the electrode. All data regarding pH, Rel mV, ISE, EC or Salinity calibration is stored for the user to review when necessary. EXPIRED CALIBRATION The instrument is provided with a real time clock (RTC), in order to monitor the time elapsed since the last pH calibration.
Notes: • Buffers (standards) displayed in video inverse mode are from previous calibrations (pH and ISE range only). • The pH custom buffers are marked with an “*” on the right side of the buffer value. LAST RELATIVE mV CALIBRATION DATA Last Relative mV calibration data is stored automatically after a successful calibration. To view the Relative mV calibration data, press GLP key while in Relative mV measurement mode.
LAST EC CALIBRATION DATA The last pH calibration data is stored automatically after a successful calibration. To view the EC calibration data, press GLP when the instrument is in the EC measurement mode. The instrument will display a lot of data including calibration standards, offset, time and date, cell constant, etc. LAST NaCl % CALIBRATION DATA Last NaCl calibration data is stored automatically after a successful calibration.
SETUP Setup mode allows viewing and modifying the measurement parameters. These are general SETUP parameters for all the ranges and range specific parameters. The following table lists the general SETUP parameters, their valid range and the factory default settings.
The following table lists the specific pH/ORP/ISE range parameters. Item Calibribration Timeout (pH/ISE) First point mode (pH) Custom buffer (pH) pH Resolution Description Number of days after Calibration warning is displayed Management of 1 point calibration Custom buffer setting Set pH resolution display View calibr. Display calibration points (pH) points Display out of calibr.
To enter SETUP menu, press SETUP function key while in measuring mode. If SETUP is not displayed press MENU key. GENERAL PARAMETER SCREENS Backlight Focus on the Backlight item. Press Modify. Use / keys to change the intensity then press Accept to confirm. Press ESC to leave without changing. Contrast Focus on the Contrast item. Press Modify. Use / keys to change contrast then press Accept to confirm. Press ESC to leave without changing.
Date/Time Focus on the Date/Time item. Press Modify. Use / keys to select item. Use ARROW keys to change focused values. Press Accept to confirm new setting, or ESC to leave without changing. Time Format Focus on the Time Format item. Press function key to change the option. Date Format Focus on the Date Format item. Press Modify. Use ARROW keys to select date format then press Accept. Press ESC to leave without changing.
Language Focus on the Language item. Use the desired function key to change the option. Wait until new language is loaded. If language load fails the instrument will try to reload current language. If any language can’t be loaded, the instrument will work in safe mode. In this mode all messages are displayed in English and HELP is not available. Temperature unit Focus on the Temperature Unit item. Press the displayed function key in order to change the temperature unit. Beep On Focus on Beep On item.
AutoEnd stability Focus on AutoEnd Stability item. Press one of the displayed function keys to select the AutoEnd stability criteria. Three options are available: Fast, Medium, Accurate. For the pH range the stability criteria are different for different pH resolution selected (Medium in 0.01 pH range is different than Medium in 0.001 range). Log interval Focus on Log interval item. Press Modify in order to change the option. Use the arrow keys in order to select an option.
Instrument ID Focus on the Instrument ID item. Press Modify. Use ARROW keys to change the instrument ID. Press Accept to confirm or ESC to exit without saving. Baud Rate Focus on the Baud Rate item. Press Modify. Use ARROW keys to select the desired communication baud. Press Accept to confirm or ESC to exit. Meter information Focus on the Meter Information item. Press Select.
The meter informations are displayed: -firmware version -language version -mV/EC and temperature factory calibration time/date pH CHANNEL RANGE SPECIFIC PARAMETERS SCREENS Calibration Timeout Focus on the Calibration Timeout item. Press Modify. Use ARROW keys to set desired value. Press Accept to confirm or ESC to return without saving. Note: If enabled “CAL DUE” warning will be displayed, the set number of days calibration is past due. First point mode Focus on the First Point Mode item.
If Offset is set, after one point calibration the instrument evaluates the offset and keeps the slopes unchanged. Custom Buffers Focus on the Custom Buffers item. Press Modify. Press Delete to delete focused buffer. Press Add to add a new buffer to the list (max 2). Press Modify to set custom buffer value. Use ARROW keys to change the value. Press Accept to confirm custom buffer value or ESC to exit without saving. pH Resolution Focus on the pH Resolution item.
View Calibration Points Focus on the View Calibration Points item. Press the displayed function key to change option. If option is enabled the calibration buffers corresponding to the last calibration are displayed in the pH measurement screen. Out of Calibration Range Warning Focus on the Out of Cal. Range Warning item. Press the displayed function key in order to change option. If enabled, the “Out of cal. range” message will be displayed if the pH reading is not within the calibration range.
Focus on Charge/Slope item. Use ARROW keys in order to select the desired combination. If “None/-59.16“ is selected the slope of the probe can be changed by pressing Modify key. Press Modify. Use ARROW keys to change the slope. Press Accept to confirm or ESC to exit. Focus on Molar Weight. Press Modify in order to change molar weight. Use ARROW keys to change the value. Press Accept to confirm or ESC to exit.
If Standard was pressed. Use ARROW keys to focus on the desired electrode. Press Accept to confirm setting or ESC to exit. Press View to see probe parameters. ISE unit Focus on the ISE Unit item. Press Modify. Use ARROW key to select unit. Press Accept to confirm selection or ESC to exit. Notes: • If the unit is changed or “User” is selected a warning message will be displayed to alert that the ISE range must be calibrated.
EC CHANNEL RANGE SPECIFIC PARAMETERS Calibration Timeout Focus on the Calibration Timeout item. Press Modify. Use ARROW keys to set desired value. Press Accept to confirm or ESC to return without saving. Note: If enabled “CAL DUE” warning will be displayed, the set number of days after calibration is over passed. Out of Calibration Range Warning Focus on Out of Cal. Range Warning item. Press the corresponding functional key in order to enable/disable this feature.
Select No TC in order to display actual conductivity (no temperature compensation). Select MTC in order to automatically compensate conductivity using the set temperature coefficient with the temperature manually selected by the user. Select ATC in order to automatically compensate conductivity using the set temperature coefficient with the temperature read from the sensor inside the EC probe. Range Select Focus on the Range Select item. Press Modify to select ranging mode.
Use ARROW keys to change the cell constant value. Press Accept to confirm or ESC to exit without changing. Note: If the cell constant value is modified, the EC slope calibration is deleted and the NaCl calibration is deleted. If performed, the EC offset calibration remains active. Temperature Coefficient Focus on the Temperature Coef. item. Press Modify in order to set the temperature coefficient. Use the ARROW keys to change the value. Press Accept to confirm or ESC to exit without changing.
LOGGING This feature allows the user to log pH, Rel mV, ISE, EC, TDS, NaCl or Resistivity measurements. All logged data can be transferred to a PC through the USB port. The logging space includes 400 records of Log on demand and 600 records of Log interval (lot logging). The log interval is organized in lots. A maximum of 100 lots are accepted. One lot can occupy all the memory space available. LOGGING THE CURRENT DATA To store the current reading into memory, press Log while in measurement mode.
Notes: • At Power Off the current lot is automatically closed. • If the 600 records space or 100 lots are reached, the “AutoLog space is full” message will be displayed. • Enter View Log Data mode and delete lots in order to free space. VIEW LOGGED DATA Press the Recall function key to retrieve the information stored while in measurement mode for the specific range. If the Recall function key is not displayed press MENU key. The Recall selection screen is displayed.
If Delete is pressed. Use ARROW key to focus the record to be deleted and then press Confirm. Press ESC to exit. If Delete All is pressed the instrumet asks for confirmation. Press Confirm to confirm or ESC to exit without deleting. If AutoLog is pressed, the lot information of the specific range are displayed. Use the ARROW keys to scroll the lots. Press the Delete All function key to enter the Delete All lots screen. Press the Delete function key to enter the Delete lot screen.
m V CALIBRATION (for technical personnel only) All the instruments are factory calibrated for mV, EC and temperature. Hanna’s temperature probes are interchangeable and no temperature calibration is needed when they are replaced. If the temperature or ORP measurements are inaccurate, calibration should be performed. For an accurate recalibration, contact your dealer or the nearest Hanna Customer Service Center, or follow the instructions below.
TEMPERATURE CALIBRATION (for technical personnel only) • Press CAL key on the pH range or on the EC range. The calibration screen is displayed. Press Temp function key to enter the temperature calibration mode. The temperature calibration is performed for the current channel only. The calibration routine is the same for both channels, so Ch1 calibration is presented next. • Prepare a vessel containing ice and water and another one containing hot water (at approximately 50 ºC or 122 ºF).
• Use the ARROW keys to set the calibration point value to that of the hot water. • When the reading is stable and close to the selected calibration point, Confirm function key is displayed. • Press Confirm to confirm. The instrument returns to the calibration screen. Note: Use ARROW keys to change calibration point if necessary (±10.0 ºC) around the point. If the reading is not close to the selected calibration point, “Wrong” message will blink. Change the temperature probe and restart calibration.
PC INTERFACE Data transmission from the instrument to the PC can be done with the HI 92000 Windows® compatible software (optional). HI 92000 also offers graphing and 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 an USB cable connector. Make sure that your instrument is switched off and plug one connector to the instrument USB socket and the other to the serial or USB port of your PC.
CHRxx Change the instrument range according with the parameter value (xx): • xx=10 pH range/0.001 resolution on channel 1 • xx=11 pH range/0.01 resolution on channel 1 • xx=12 pH range/0.
• Resistivity, EC and temperature reading on the Resistivity range • TDS, EC and temperature reading on the Resistivity range • Salinity, EC and temperature reading on the Resistivity range The answer string contains: • Meter mode (2 chars): • 10 pH range/0.001 resolution on channel 1 • 11 pH range/0.01 resolution on channel 1 • 12 pH range/0.
MDR GLPx • The unit of the second reading (1 char) (it is sent only for Resistivity, TDS and Salinity ranges only). It represents the unit of the EC reading (0 - microsiemens, 1 - milisiemens) • Secondary reading (only when primary reading is not mV or EC) - 8 ASCII chars, including sign and decimal point. • Temperature reading - 7 ASCII chars, with sign and decimal point, always in ºC. Requests the instrument model name and firmware code (16 ASCII chars). Requests the calibration data record.
• electrode condition, with sign (3 chars).
PARx sign and decimal point (6 chars) • Salinity calibration data (if available), which contains: • the number of calibrated standards (1 char always 1) • the salinity factor, with sign and decimal point (7 chars) • calibration time, yymmddhhmmss (12 chars) Requests the setup parameters setting.
NSLxy LLSxy encoding • 0x01 - beep ON (else OFF) • 0x02 - degrees Celsius (else Fahrenheit) • 0x04 and 0x08 - this 2 bits represent the temperature compensation mode (10 - ATC, 01 - MTC, 00 - NoTC) • The cell constant, with sign and decimal point (7 chars) • The temperature compensation coefficient, with sign and decimal point (6 chars) • The temperature reference value (2 chars) • The TDS factor, with sign and decimal point (5 chars) • The short name of the selected language (3 chars) Requests the number
• the log interval (5 chars): the value is in seconds; for AutoEnd log the value sent is 11000 • the log starting time, yymmddhhmmss (12 chars) GLDxyqqq Requests all records of the qqqth lot from the specified channel and range (x - channel number; y - range first letter).
• For each record: • The number of the record (3 chars) • The reading status (1 char): R, O, U • The unit of the reading (2 chars): it is sent only for ISE, EC, Resistivity, TDS, Salinity log only • The calculated reading, with sign, decimal point and exponent (12 chars) • The temperature reading, with sign and decimal point (7 chars) • The second reading status (1 char): R, O, U; not available for EC log • The second unit of the reading (2 chars); it is sent only for Resistivity, TDS and Salinity log only
• The reading status (1 char): R, O, U • The unit of the reading (2 chars): it is sent only for ISE, EC, Resistivity, TDS, Salinity log • The calculated reading, with sign, decimal point and exponent (12 chars) • The temperature reading, with sign and decimal point (7 chars) • The reading status (1 char): R, O, U; not available for EC log • The second unit of the second reading (2 chars); it is sent only for Resistivity, TDS and Salinity log • The second reading, with sign and decimal point (8 chars); not a
TEMPERATURE CORRELATION FOR p H 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 (77 ºF). 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.
ELECTRODE CONDITIONING & MAINTENANCE Not present in gel electrodes. PREPARATION PROCEDURE Remove the electrode 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. These bubbles can be removed by "shaking down" the electrode as you would do with a glass thermometer.
For refillable electrodes: If the filling solution (electrolyte) is more than 2½ cm (1”) below the fill hole, add HI 7082 or HI 8082 3.5M KCl Electrolyte Solution for double junction or HI 7071 or HI 8071 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 has run down and the electrode should be replaced.
Follow the Storage Procedure above. pH CLEANING PROCEDURE • General Soak in Hanna HI 7061 or HI 8061 General Cleaning Solution for approximately ½ hour. Soak in Hanna HI 7073 or HI 8073 Protein • Protein Cleaning Solution for 15 minutes. Soak in Hanna HI 7074 Inorganic Cleaning • Inorganic Solution for 15 minutes. • Oil/grease Rinse with Hanna HI 7077 or HI 8077 Oil and Fat Cleaning Solution.
EC PROBE MAINTENANCE Rinse the probe with clean water after measurements. If more cleaning is required, remove the probe sleeve and clean the probe with a cloth or a nonabrasive detergent. Make sure to reinsert the sleeve onto the probe properly and in the right direction. After cleaning the probe, recalibrate the instrument. The platinum rings are sustained with glass. Take great care while handling the probe.
TROUBLESHOOTING GUIDE SYMPTOMS PROBLEM SOLUTION S l ow re sp on se /e xce ssi v e D irty pH electrode. drift. S oa k th e el ectrod e ti p i n H I 7061 cleaning solution for 30 minutes. Refill with fill solution. Reading fluctuates up and Clogged/dirty junction. down (noise). L ow e l e c t rol y t e l e v e l ( re f i l l a b l e e l e c t r od e s only). E C probe not properly connected. C l e a n t h e e l e c t rod e ( s e e above). Refill with fresh electrolyte (refillable electrodes only).
ACCESSORIES pH CALIBRATION SOLUTIONS HI 50004-01 pH 4.01 Buffer Solution, 20 mL sachet, 10 pcs HI 50004-02 pH 4.01 Buffer Solution, 20 mL sachet, 25 pcs HI 50007-01 pH 7.01 Buffer Solution, 20 mL sachet, 10 pcs HI 50007-02 pH 7.01 Buffer Solution, 20 mL sachet, 25 pcs HI 50010-01 pH 10.01 Buffer Solution, 20 mL sachet, 10 pcs HI 50010-02 pH 10.01 Buffer Solution, 20 mL sachet, 25 pcs HI 5016 pH 1.68 Buffer Solution, 500 mL bottle HI 5004 pH 4.01 Buffer Solution, 500 mL bottle HI 5068 pH 6.
HI 8082 3.
HI 1131B Glass-body, single junction, refillable, combination pH electrode. Use: general purpose. 9.5mm DIA 0.37" 12 mm 0.5" HI 1131 120 mm 4.7" "S" VERSION HI 1330B Glass-body, semimicro, single junction, refillable, combination pH electrode. Use: laboratory, vials. 5mm DIA 0.2" 5mm 0.2" HI 1330 120 mm 4.7" "S" VERSION HI 1331B Glass-body, semimicro, single junction, refillable, combination pH electrode. Use: flasks. 8 mm 0.3" 7.5mm DIA 0.29" HI 1331 210 mm 8.
HI 1332B Plastic-body (PES), double junction, refillable, combination pH electrode. Use: general purpose. 12 mm 0.5" HI 1332 120 mm 4.7" "S" VERSION FC 100B Plastic-body (PVDF), double junction, refillable, combination pH electrode. Use: general purpose for food industry. 12 mm 0.5" FC 100 120 mm 4.7" FC 200B Plastic-body (PVDF), open junction, conic, Viscolene, non-refillable, combination pH electrode. Use: meat & cheese. 6 mm 0.25" FC 200 75 mm 2.
FC 911B Plastic-body (PVDF), double junction, refillable with built-in amplifier, combination pH electrode. Use: very high humidity. 12 mm 0.5" FC 911 110 mm 4.3" HI 1413B Glass-body, single junction, flat tip, Viscolene, non-refillable, combination pH electrode. Use: surface measurement. 12 mm 0.5" HI 1413 110 mm 4.3" ORP ELECTRODES HI 3131B Glass-body, refillable, combination platinum ORP electrode. Use: titration. 12 mm 0.5" HI 3131 "S" VERSION 150 mm 5.
EXTENSION CABLE FOR SCREW-TYPE ELECTRODES (SCREW TO BNC ADAPTER) HI 7855/1 Extension cable 1 m (3.3') long HI 7855/3 Extension cable 3 m (9.9') long OTHER ACCESSORIES HI 740157 HI 76404N HI 7662-T HI 8427 HI 931001 HI 76404N Plastic electrode refilling pipet (20 pcs) Electrode holder Stainless steel Temperature probe with 1 m (3.3') screened cable pH and ORP electrode simulator with 1 m (3.3') coaxial cable ending in female BNC connectors pH and ORP electrode simulator with LCD and 1 m (3.
RECOMMENDATIONS FOR USERS Before using these products, make sure 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, requiring the operator to follow all necessary steps to correct interferences. The glass bulb at the end of the pH electrode is sensitive to electrostatic discharges. Avoid touching this glass bulb at all times.
Hanna Instruments Inc. Highland Industrial Park 584 Park East Drive Woonsocket, RI 02895 USA Technical Support for Customers Tel. (800) 426 6287 Fax (401) 765 7575 E-mail tech@hannainst.com www.hannainst.
