Instruction Manual HI 9321 HI 931400 HI 931401 Microprocessor-based Bench pH/mV/°C Meters ins rum ns pH ca libration CAL / pH CFM / CFM Select Confir °C Start Select Confir m wh m wh buffer calibra buffer proce dure tion MEM dy en rea MR COMM dy RANG HI 93 MIC 1401 pH M ROPROCE ETER SSOR MEM Functio n 1 value en rea 2 value E Sel ect For sto Recal For RS pH or ring dis l previo 232 con ORP us sto figurati measu play res red dat ult a on rement ON °C OFF MR °C
Dear Customer, Thank you for choosing a Hanna Product. It is recommended that you read this instruction manual carefully before using the instrument. This manual will provide you with the necessary information for the correct use of the instrument, as well as a precise idea of its versatility. If you need more technical information, do not hesitate to e-mail us at tech@hannainst.com. This instrument is in compliance with the CSA, UL and Directives. TABLE OF CONTENTS PRELIMINARY EXAM.
PRELIMINARY EXAMINATION Remove the instrument from the packing material and examine it 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 meter comes supplied complete with: • HI 1131B glass-body combination pH Electrode with 1 m (3.3') cable • HI 7669/2W Temperature Probe • HI 76405 Electrode Holder • pH 4.01 & 7.
FUNCTIONAL DESCRIPTION HI 9321 pH calibration procedure CAL ins rum n s 1 Function Start calibration / Select buffer 1 value CFM Confirm when ready / Select buffer 2 value CFM Confirm when ready RANGE Select pH or ORP measurement MEM For storing display result MR Recall previous stored data pH MEM mV CAL NOT READY CON WRONG BUF 1 °C 2 pH HI 9321 MICROPROCESSOR pH METER CAL °C MEM ON/OFF CFM °C MR RANGE 2 3 1. 2. 3. 4. 5. 6. 7. 8. I. II. III. IV. V. VI.
FUNCTIONAL DESCRIPTION HI 931400 & HI 931401 pH calibration procedure ins rum n s CAL Function Start calibration / Select buffer 1 value CFM Confirm when ready MEM MR For storing display result Recall previous stored data COMM For RS232 configuration pH 1 / Select buffer 2 value CFM Confirm when ready MEM mV CAL RANGE Select pH or ORP measurement NOT READY CFM WRONG BUF 2 1 °C 2 pH HI 931401 MICROPROCESSOR pH METER MEM °C MR °C CAL COMM CFM RANGE 3 4 5 ON OFF 10 9 6
SPECIFICATIONS HI 9321 & HI 931400 Range pH ISE ORP °C 0.00 to 14.00 ±399.9 mV ±1999 mV 0.0 to 100.0 Resolution pH ISE ORP °C 0.01 0.1 mV 1 mV 0.1 Accuracy (@20°C/68°F) pH ISE ORP °C ±0.01 ±0.2 mV ±1mV ±0.5 Typical EMC Deviation pH ISE ORP °C ±0.02 ±0.5 mV ±1 mV ±2 pH Calibration Automatic 1 or 2 points with 5 memorized buffers (4.01, 6.86, 7.01, 9.18, 10.
SPECIFICATIONS HI 931401 Range pH mV °C 0.00 to 14.00 / 0.000 to 14.000 ±999.9 (ISE & ORP) 0.0 to 100.0 Resolution pH mV °C 0.01 / 0.001 0.1 0.1 Accuracy (@20°C/68°F) pH mV °C ±0.002 & ±0.01 ±0.05% F.S. ±0.5 Typical EMC Deviation pH mV °C ±0.01 ±0.6 ±0.5 pH Calibration Automatic 1 or 2 points with 5 memorized buffers (4.01, 6.86, 7.01, 9.18, 10.
FUNCTIONAL DESCRIPTION OF HI 9231 & HI 931400 LCD Primary Display pH MEM mV CAL NOT READY CON WRONG LOW BAT BUF 1 °C 2 pH Secondary Display FUNCTIONAL DESCRIPTION OF HI 931401 LCD 8
OPERATIONAL GUIDE ELECTRODE AND PROBE CONNECTIONS For combination pH or ORP electrodes (with internal reference) plug the electrode's BNC to the socket on the back of the meter (pages 45, # I). For electrodes with a separate reference, connect the measuring electrode's BNC to the BNC socket (pages 4-5, # I) and the reference electrode plug to the other socket (pages 4-5, # II or III).
In order to take accurate pH measurements, make sure that the instrument has been calibrated before use (see page 12). For more accurate results, it is recommended that the electrode is rinsed thoroughly with a liberal amount of the sample to be measured. The pH reading is directly affected by temperature. In order for the meter to measure the pH accurately, temperature must be taken into consideration. A perfect equilibrium between the pH electrode and the sample can take up to 15 minutes.
ORP MEASUREMENTS Press RANGE. Submerge the ORP or ISE electrode tip (4cm/ 1½") into the sample. 4 cm (1½") Allow a few minutes for the reading to stabilize. mV ºC If readings are out of range "---" will appear on the LCD. mV °C See also "Taking REDOX Measurements" on page 16. TEMPERATURE MEASUREMENTS Taking a temperature measurement is very easy. Connect the HI 7669/2W temperature probe and turn the instrument ON.
RESET BUTTON The RESET button (see pages 4-5, #V) should be used when the instrument displays erroneous messages due to strong electrical interference or when the instrument's power supply was disconnected before the meter was switched off. It is recommended to recalibrate the unit before proceeding. pH CALIBRATION Calibrate the instrument often, especially if high accuracy is required. The instrument should be re-calibrated for pH: a) Whenever the pH electrode is replaced. b) At least once a week.
PROCEDURE Calibration has a choice of 5 memorized buffers: 4.01, 6.86, 7.01, 9.18 and 10.01 pH. It is always recommended to perform a two-point calibration, first in an offset buffer (pH 6.86 or pH 7.01) and then a slope value (pH 4.01, pH 9.18 or pH 10.01). The pH meter however also provides for one-point calibration, as described below. • Press CAL. The "CAL" and " displayed.
close to the selected buffer, the meter stores the reading. The buffer value is then displayed on the primary LCD and the secondary LCD will display "4.01". • Press CAL and the meter exits the calibration mode. pH CAL 1 BUF 4 cm (1½") Two-point calibration Any two of the 5 memorized buffer solutions that are more than 1 pH apart can be used for this purpose. However, it is recommended that pH 6.86 or 7.01 is chosen as the offset point and pH 4.01 (acidic) or pH 9.18/10.
Note: The meter will automatically skip the buffer that was used for the first calibration. pH 6.86 and pH 7.01 as well as 9.18 and 10.01 pairs of buffer solutions are also considered too close to allow an adequate two-point calibration. Consequently, after calibrating in one of the pair, the meter will also skip the other buffer. Note: During calibration, the secondary LCD displays the selected buffer value. Press RANGE and the temperature of the buffer will be displayed during calibration.
pH VALUES AT VARIOUS TEMPERATURES 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 meter will automatically calibrate to the pH value corresponding to the measured or set temperature. TEMP °C °F 32 0 41 5 50 10 59 15 68 20 77 25 86 30 95 35 40 104 45 113 50 122 55 131 60 140 65 149 70 158 4.01 4.01 4.00 4.00 4.00 4.00 4.01 4.02 4.03 4.04 4.05 4.06 4.07 4.09 4.11 4.12 6.86 6.98 6.95 6.92 6.
TEMPERATURE AND mV CALIBRATION The pH meter has been factory calibrated for temperature and mV. The temperature probes and ORP electrodes are interchangeable and no temperature or mV calibration is needed when they are replaced. If, for any reason, the temperature or the mV measurements are inaccurate, temperature or mV recalibration should be carried out (see pages 24 and 25). For an accurate recalibration, contact your dealer or the nearest Hanna Customer Service Center.
TROUBLESHOOTING GUIDE Symptoms Problem Solution The meter is slow in The electrode is not Leave the electrode in a storresponding or gives working or the reference age solution after cleaning faulty readings the junction. If problem perjunction is clogged sists, replace the electrode The meter does not Out of order pH elec- Follow the cleaning proceaccept the 2nd buffer trode dure.
ELECTRODE CONDITIONING & MAINTENANCE PREPARATION Remove the protective cap. DO NOT BE ALARMED IF ANY SALT DEPOSITS ARE PRESENT. This is normal with electrodes and they will disappear when rinsed with water. During transport tiny bubbles of air may 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 a 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. Removal of films, dirt or deposits on the membrane/junction: - Protein Soak in Hanna HI 7073 or HI 8073 Protein Cleaning Solution for 15 minutes. - Inorganic Soak in Hanna HI 7074 or HI 8074 Inorganic Cleaning Solution for 15 minutes. - Oil/grease Rinse with Hanna HI 7077 or HI 8077 Oil and Fat Cleaning Solution.
TEMPERATURE-RESISTANCE CORRELATION FOR HANNA pH SENSITIVE GLASS The resistance of glass electrodes partially depends on the temperature. The lower the temperature, the higher the resistance. It takes longer for the reading to stabilize if the resistance is higher. In addition, the response time will suffer to a greater degree at temperatures below 10°C. Since the resistance of the pH electrode is in the 200 Mohm range, the current across the membrane is in the pico Ampere range.
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 the alkaline error and causes the pH to be underestimated. Hanna's glass formulations have the indicated characteristics. Alkaline Error Sodium Ion Correction for the Glass at 20-25°C Concentration pH Error 0.1 Mol L-1 Na+ 13.00 0.10 13.50 0.14 14.00 0.20 12.50 0.10 13.00 0.18 13.50 0.29 14.
ADDITIONAL CALIBRATION PROCEDURES & INFORMATION (for technical personnel only) TEMPERATURE CALIBRATION Initial Preparation • Prepare a vessel containing ice and water and another one containing hot water (at a temperature of at least 50°C). Place insulation material around the container to minimize temperature changes. • Use a ChecktempC or a calibrated thermometer with a resolution of 0.1 °C as a reference thermometer. Procedure • With the instrument off, press both CAL and ON keys simultaneously.
• When the temperature reading has stabilized, use the ↑°C or ↓°C keys to set the reading on the secondary LCD to that of the reference thermometer. • Press CFM. The primary LCD section will show "380.0 mV". • Complete your temperature calibration by pressing CAL if you do not want to perform mV calibration. mV CALIBRATION • Use a mV simulator with a range of ±500.0 mV and an accuracy of ±0.1 mV. • Continuing from the temperature calibration, the primary LCD section will show "380.0 mV". • Select 380.
The following baud rate can be selected with ↑°C and ↓°C: 150, 300, 600, 1200 (factory setting) and 2400. Press CFM to confirm the setting and the primary LCD shows the current command prefix (factory setting is 16). °C °C CFM Note: The Command Prefix must not be changed when using HI 92000 Hanna Software. Select a different command prefix (between 0 and 47) by pressing ↑ °C and ↓°C. °C °C CFM Press CFM to confirm the setting.
DWC is equivalent to pressing the ↓°C key MEM is equivalent to pressing the MEM key MRR is equivalent to pressing the MR key COM is equivalent to pressing the COMM key OFF is equivalent to pressing the OFF key Commands requiring an answer: pH? Causes the meter to send the pH value. If the reading is out of range "Err 1" is sent. If the range is set to mV, "Err 6" is sent. MV? Causes the meter to send the mV value. If the reading is out of range "Err 2" is sent. If the range is set to pH, "Err 6" is sent.
ELECTRODE STORAGE SOLUTION HI 70300L Storage Solution, 460 mL ELECTRODE STORAGE SOLUTION IN FDA APPROVED BOTTLES HI 80300L Storage Solution, 460 mL ELECTRODE CLEANING SOLUTIONS HI 70000P HI 7061L HI 7073L HI 7074L HI 7077L Electrode Cleaning Sachets, 20 mL, 25 pcs General Cleaning Sol., 460 mL Protein Cleaning Sol., 460mL Inorganic Cleaning Sol., 460mL Oil & Fat Cleaning Sol.
pH & ORP ELECTRODES All electrodes part numbers ending in B are supplied with a BNC connector and 1 m (3.3') cable. HI 1043B Glass-body, double junction, refillable, combination pH electrode. Use: strong acid/alkali. 9.5mm DIA 0.37" 12 mm 0.5" HI 1043 120 mm 4.7" "S" VERSION HI 1053B Glass-body, triple ceramic, conic shape, refillable, combination pH electrode. Use: emulsions. 12 mm 0.5" HI 1053 120 mm 4.7" "S" VERSION HI 1083B Glass-body, micro, Viscolene, non-refillable, combination pH electrode.
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 8.25" "S" VERSION HI 1230B Plastic-body (Ultem®), double junction, gel-filled, combination pH electrode. Use: general, field. 12 mm 0.5" HI 1230 "S" VERSION 120 mm 4.
FC 100B Plastic-body (Kynar®), 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 (Kynar®), open junction, conic, Viscolene, non-refillable, combination pH electrode. Use: meat & cheese. 6 mm 0.25" FC 200 75 mm 2.95" FC 210B Glass-body, double junction, conic, Viscolene, non-refillable, combination pH electrode. Use: milk, yogurt. 12 mm 0.5" FC 210 120 mm 4.
FC 911B Plastic-body (Kynar®), 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" Half-cell electrodes: HI 2110B Glass-body, single half-cell pH electrode. Use: general purpose. 9.5mm DIA 0.37" 12 mm 0.5" HI 2110 120 mm 4.
HI 5412 Glass-body, single Calomel reference half-cell electrode, refillable with 4mm plug with 1m (3.3') cable. Use: general purpose with constant temperature range. 12 mm 0.5" HI 5412 120 mm 4.7" ORP electrodes: HI 3131B Glass-body, refillable, combination platinum ORP electrode. Use: titration. 12 mm 0.5" HI 3131 150 mm 5.9" "S" VERSION HI 3230B Plastic-body (Ultem®), gel-filled, combination platinum ORP electrode. Use: general purpose. 12 mm 0.5" HI 3230 120 mm 4.
ACCESSORIES HI 710005 HI 710006 ChecktempC HI 76405 HI 7669/2W HI 92000 HI 920010 Transformer 110VAC to 12 VDC Transformer 220VAC to 12 VDC Pocket-size thermometer (range -50.0 to 150.0°C) Electrode holder Temp. probe with 1 m (3.3') cable Windows® compatible software 9 to 9-pin RS232 cable Windows® is registered Trademark of "Microsoft Co.
CE DECLARATION OF CONFORMITY Recommendations for Users Before using this product, make sure that it is entirely suitable for the environment in which it is to be used. Operation of this instrument in residential areas could cause unacceptable interferences to radio and TV equipment, requiring the operator to take 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.
MAN9321R2 03/97 w w w . h a n n a i n s t .
