Instruction Manual HI 2212 HI 2213 pH/mV/°C Bench Meters with Custom Buffers 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 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 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 pH Electrode with 1 m (3.3') Cable • HI 7662 Temperature Probe • HI 76404N Electrode Holder • pH 4.01 & 7.
FUNCTIONAL DESCRIPTION HI 2212 AND HI 2213 Front Panel Rear Panel 1) Liquid Crystal Display (LCD). 2) CAL key, to enter and exit calibration mode. 3) CFM/GLP key, to confirm different values or to display Good Laboratory Practice information. 4) ºC key, to manually increase temperature value or other parameters. 5) ºC key, to manually decrease temperature value or other parameters. 6) SETUP key, to enter/exit SETUP mode.
HI 2212 AND HI 2213 SPECIFICATIONS –2.00 to 16.00 pH HI 2213 only ±699.9 mV ±2000 mV RANGE –20.0 to 120.0 ºC (-4.0 to 248°F) 0.01 pH HI 2213 only 0.1 mV 1 mV RE SOLUTION 0.1 ºC ±0.01 pH ACCURACY @ 20°C / 68°F ±0.2 mV (±699.9 mV)(HI 2213 only) ±1 mV (±2000 mV)(HI 2213 only) ±0.2 ºC (excluding probe error) Rel mV offset range ±2000 mV (HI 2213 only) pH Calibration 1, 2 or 3 point calibration, 5 standard buffers available (4.01, 6.86, 7.01, 9.18, 10.
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 main line. ELECTRODE AND PROBE CONNECTIONS For pH or ORP measurements connect an electrode with internal reference to the BNC connector on the back of the instrument.
If measurements are taken successively in different samples, it is recommended to rinse the electrode thoroughly with deionized water or tap water 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, the temperature effect must be compensated for.
RELATIVE mV MEASUREMENTS (HI 2213) • Press RANGE until “rEL” message will be displayed on the secondary LCD line for one second and “mV” tag will blink. After one second the temperature will be displayed on the secondary LCD. The reading displayed by the instrument is equal to the difference between the current mV input value and relative mV offset established in the relative mV calibration. TEMPERATURE MEASUREMENTS Connect the HI 7662 temperature probe to the appropriate socket and turn the instrument on.
p H CALIBRATION Calibrate the instrument frequently, especially if high accuracy is required. The instrument should be recalibrated: • Whenever the pH electrode is replaced. • At least once a week. • After testing aggressive chemicals. • If “CAL” “INTV” tags are blinking during measurement. Every time you calibrate the instrument use fresh buffers and perform an electrode Cleaning Procedure (see page 26). PREPARATION Pour small quantities of the buffer solutions into clean beakers.
THREE-POINT CALIBRATION • 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 CAL. The “CAL” and “ ” tags will appear and the “7.01” buffer will be displayed on the secondary LCD. 3 cm (1¼") BUF • If necessary, press the ARROW keys to select a different buffer value. • The “ ” tag will blink on the LCD until the reading is stable.
• The “ ” tag will blink on the LCD until the reading is stable. • When the reading is stable and close to the selected buffer, the “READY” tag will be displayed and the “CFM” tag will blink. • Press CFM to confirm calibration. • The instrument stores the calibration value and returns to measurement mode. TWO-POINT CALIBRATION • Proceed as described in “THREE-POINT CALIBRATION” section. • Press CAL after the second calibration point was confirmed.
• To clear calibration parameters for all buffers starting with current buffer, press and hold down CFM, then press CAL. The calibration will continue from the current point. If this procedure is performed while calibrating in the first calibration point “CLr ALL” message is displayed for a few seconds then the instrument returns to measurement. • Press RANGE (u for HI 2212) to toggle between pH buffer and temperature reading.
p H 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 pH BUFFERS ºC ºF 4.01 6.86 7.01 9.18 10.01 0 32 4.01 6.98 7.13 9.46 10.32 5 41 4.00 6.95 7.10 9.39 10.24 10 50 4.00 6.92 7.07 9.33 10.18 15 59 4.00 6.90 7.04 9.
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 the last calibration (one, two, or three point) is stored for the user to review when necessary. This data includes the following: calibration time stamp, offset (mV), average of slope (%), calibration buffers and the time until a new calibration is required.
• The pH calibration buffers in calibrating order. The first pH calibration buffer: The second pH calibration buffer: The third pH calibration buffer: Notes:• 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). • For each custom buffer used in calibration, the “BUFFER pH” tag will blink.
- or the number of days until the calibration alarm will be displayed - or if expired (7 days ago) Notes: • Press GLP to return to measurement mode. • If calibration has not been performed, the instrument displays “no CAL”.
SETUP Setup mode allows viewing and modifying the following parameters: • Expired Calibration Alarm • First Custom Buffer • Second Custom Buffer • One-point Calibration Behavior • Current Time (hour & minute) • Current Date (year, month & day) • Beep Status • Temperature Unit To enter SETUP mode press SETUP while the instrument is in measurement mode. Select a parameter with the ARROW keys. Press CAL if you want to change a parameter value. The selected parameter will start blinking.
SECOND CUSTOM BUFFER Press CAL when “cb2” is displayed. The custom buffer (disabled – “no” or “0” to “16” pH) and “CFM” will start blinking. Press the ARROW keys to change the custom buffer value. Press CFM to save the modified custom buffer value. Press CAL to escape without saving. 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 PROCEDURE for details, page 8).
CURRENT DATE Press CAL when the current date is displayed. The year and “CFM” will start blinking. Press the ARROW keys to change the year. Press RANGE (HI 2213) or u (HI 2212). The month and “CFM” will start blinking. Press the ARROW keys to change the month. Press RANGE (HI 2213) or u (HI 2212). The day and “CFM” will start blinking. Press the ARROW keys to change the day. Press CFM to save the modified value. Press CAL to escape without saving. BEEP STATUS Press CAL when the beep status is displayed.
TEMPERATURE CALIBRATION ( f o r t e c h n i c a l p e r s o n n e l o n l yy)) All the instruments are factory calibrated for temperature. Hanna’s temperature probes are interchangeable and no temperature calibration is needed when they are replaced. If the temperature measurements are inaccurate, temperature recalibration should be performed. For an accurate recalibration, contact your dealer or the nearest Hanna Customer Service Center, or follow the instructions below.
• Use the ARROW keys to set the reading on the secondary LCD to that of the hot water. • 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. Change the temperature probe and restart calibration.
m V CALIBRATION ( f o r t e c h n i c a l p e r s o n n e l o n l yy)) All the instruments are factory calibrated for mV. Hanna’s 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 dealer or the nearest Hanna Customer Service Center, or follow the instructions below. A two-point calibration can be performed at 0.0 mV and 1800.0 mV.
RELATIVE m V CALIBRATION (HI 2213) • Press CAL when the instrument is in RELATIVE mV measurement mode. The “mV” and “ ” tags will blink. Absolute mV is displayed on the primary LCD and “AbS” message is displayed on the secondary LCD. • When the absolute reading is stable and in measurement range, the instrument asks for confirmation. • If the reading is out of range, “WRONG” tag will be displayed. • Press CFM to confirm the absolute value. The instrument will display “0.
ELECTRODE CONDITIONING & 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 affecting proper functioning of the electrode. 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 is run down and the electrode should be replaced.
CLEANING PROCEDURE • General Soak in Hanna HI 7061 or HI 8061 General Cleaning Solution for approximately ½ hour. • Protein Soak in Hanna HI 7073 or HI 8073 Protein Cleaning Solution for 15 minutes. • Inorganic Soak in Hanna HI 7074 Inorganic Cleaning Solution for 15 minutes. • Oil/grease Rinse with Hanna HI 7077 or HI 8077 Oil and Fat Cleaning Solution.
TROUBLESHOOTING GUIDE SYMPTOMS PROBLEM SOLUTION Slow response/excessive D irty pH electrode. drift. Clean the electrode and then soak the tip in HI 7061 or HI 8061 for 30 minutes. Readings fluctuate up Clogged/dirty junction. and down (noise). Low electrolyte level (refillable electrodes only). Clean the electrode. Refill with fresh solution (for refillable electrodes only). Check cables and connectors. The meter does not accept the buffer solution for calibration.
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. 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.
ACCESSORIES pH BUFFER SOLUTIONS HI 70004P HI 70007P HI 70010P HI 7001L HI 7004L HI 7006L HI 7007L HI 7009L HI 7010L HI 8004L HI 8006L HI 8007L HI 8009L HI 8010L pH 4.01 Buffer Sachets, 20 mL, 25 pcs pH 7.01 Buffer Sachets, 20 mL, 25 pcs pH 10.01 Buffer Sachets, 20 mL, 25 pcs pH 1.68 Buffer Solution, 500 mL pH 4.01 Buffer Solution, 500 mL pH 6.86 Buffer Solution, 500 mL pH 7.01 Buffer Solution, 500 mL pH 9.18 Buffer Solution, 500 mL pH 10.01 Buffer Solution, 500 mL pH 4.
ORP PRETREATMENT SOLUTIONS HI 7091L Reducing Pretreatment Solution, 500 mL HI 7092L Oxidizing Pretreatment Solution, 500 mL pH ELECTRODES All electrodes part numbers ending in B are supplied with a BNC connector and 1 m (3.3') cable, as shown below : HI 1043B Glass-body, double junction, refillable, combination pH electrode. Use: strong acid/alkali. HI 1053B Glass-body, triple ceramic, conic shape, refillable, combination pH electrode. Use: emulsions.
HI 1330B Glass-body, semimicro, single junction, refillable, combination pH electrode. Use: laboratory, vials. HI 1331B Glass-body, semimicro, single junction, refillable, combination pH electrode. Use: flasks. HI 1230B Plastic-body (PES), double junction, gel-filled, combination pH electrode. Use: general, field. HI 2031B Glass-body, semimicro, conic, refillable, combination pH electrode. Use: semisolid products. HI 1332B Plastic-body (PES), double junction, refillable, combination pH electrode.
FC 100B Plastic-body (PVDF), double junction, refillable, combination pH electrode. Use: general purpose for food industry. FC 200B Plastic-body (PVDF), open junction, conic, Viscolene, non-refillable, combination pH electrode. Use: meat & cheese. FC 210B Glass-body, double junction, conic, Viscolene, non-refillable, combination pH electrode. Use: milk, yogurt. FC 220B Glass-body, triple-ceramic, single junction, refillable, combination pH electrode. Use: food processing.
HI 1413B Glass-body, single junction, flat tip, Viscolene, non-refillable, combination pH electrode. Use: surface measurement. ORP ELECTRODES HI 3131B Glass-body, refillable, combination platinum ORP electrode. Use: titration. HI 3230B Plastic-body (PES), gel-filled, combination platinum ORP electrode. Use: general purpose. HI 4430B Plastic-body (PES), gel-filled, combination gold ORP electrode. Use: general purpose.
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.
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.
