Instruction Manual HI 931402 HI 931410 Microprocessor Bench-top pH Meters ins rum ns pH ca libratio n proc edure Start calibr CAL / pH CFM / CFM Selec Confir Selec Confir °C m wh ation t buffe m wh t buffe en rea r 1 val en rea r 2 val MEM MR ue COMM dy RANG HI 93 MIC 1402 pH M ROPROC ETER ES S O R MEM Functio ue dy For RS E Se lec t pH or n For sto Recal ring dis l previo 232 con ORP us sto figurat measu play res red da ult ta ion remen t ON °C OFF MR °C CAL
Dear Customer, Thank you for choosing a Hanna Instruments Product. Please read this instruction manual carefully before using the instrument. This manual will provide you with all the necessary information for the correct use of the instrument, as well as a precise idea of its versatility in a wide range of applications. These instruments are in compliance with CSA, (EN 50081-1 and EN 50082-1) UL and directives. TABLE OF CONTENTS Preliminary Examination ........................... 1 General Description ....
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. 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.
In HI 931402, through the RS 232C serial port you can transfer sample measurements to a PC. HI 931402 comes supplied with HI1131B glassbody combination pH electrode, HI 7669/2W temperature probe (with 1 meter / 3.3' cable), HI 76405 electrode holder, pH 4.01 and pH 7.01 buffer solutions (30 ml each), HI 7071 reference electrolyte (30 ml), 12VDC adapter (HI 710005 or HI 710006) and a dust cover.
FUNCTIONAL DESCRIPTION LCD HI 931402 Primary Display pH MEM mV CAL NOT READY CON WRONG LOW BAT BUF 1 °C 2 pH Secondary Display HI 931410 pH °C Temperature Display pH/mV Display 3
FUNCTIONAL DESCRIPTION HI 931402 pH calibration procedure ins rum n s CAL Function Start calibration MEM / Select buffer 1 value CFM Confirm when ready 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 1 °C 2 pH 2 HI 931402 MICROPROCESSOR pH METER MEM °C MR °C CAL COMM CFM RANGE ON OFF 10 9 3 4 5 6 7 8 1.
SPECIFICATIONS HI 931402 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 pH (@20°C/68°F) ISE ORP °C ±0.01 ±0.2 mV ±1mV ±0.5 Typical EMC pH Deviation ISE ORP °C ±0.02 ±0.5 mV ±1 mV ±2 pH Calibration Automatic 1 or 2 points with 5 memorized buffers (pH 4.01, 6.86, 7.01, 9.18, 10.
FUNCTIONAL DESCRIPTION HI 931410 pH °C HI 931410 6 T ON OFF Buffer Values (pH) °C 4.01 7.01 10.01 0 10 20 30 40 4.01 4.00 4.00 4.02 4.04 7.13 10.32 7.07 10.18 7.03 10.06 7.00 9.96 6.98 9.88 CAL °C CON °C pH mV 1 2 4 3 5 1. ON and OFF keys to turn the instrument on and off. (Warning: Push OFF before unplugging instrument. If unplugged before turned off, the meter's memories will be erased) 2. CAL key to enter the calibration mode 3. CON key to confirm the calibration data 4.
SPECIFICATIONS HI 931410 Range pH ISE ORP °C 0.00 to 14.00 0.0 to ±399.9mV ±1999mV -10.0° to 125.0 Resolution pH ISE ORP °C 0.01 0.1mV 0.1/1mV 0.1 pH ORP °C ±0.01 ±0.2 mV ±1 mV ±0.5 Typical EMC pH DeviationISE/ORP °C ±0.01 ±0.2mV ±0.7 Recorder pH Output mV Max. Current 0 to 2 V 0 to 2 V 20mA Accuracy (@ 20°C / 68°F) ISE Offset ±1 pH Slope from 85% to 105% Calibration Temperature Compensation Electrode Temp. Probe Automatic 1 or 2 points with 3 memorized buffers (pH 4.01, 7.01, 10.
OPERATIONAL GUIDE ELECTRODE AND PROBE CONNECTIONS For combination pH or ORP electrodes (with internal reference) plug the electrode's BNC to the socket provided (see pages 4 and 6, #1). For electrode with separate reference, connect the measuring electrode's BNC to the BNC socket (see pages 4 and 6, #1) and the reference electrode's plug to the socket provided (see page 4, #2 or #3 for HI 931402, or page 6, #2 for HI 931410).
4 cm (1½") pH MEASUREMENTS To take a pH measurement simply submerge the tip (4 cm/1½") of the electrode and the temperature probe into the sample to be tested. Turn the instrument on by pressing the ON key. ON ON The meter automatically defaults to the pH measurement mode. Allow 1 or 2 minutes for the electrode to stabilize. In HI 931402 pH is displayed on the primary display and temperature on the secondary one, whereas in HI 931410 pH is displayed on the left LCD.
If measurements are taken in different samples successively, it is recommended that the electrode and the temperature probe are rinsed thoroughly for better conditioning, and then blot dry between each measurements. For this rinsing process, it is recommended to use a liberal amount of the sample to be measured. Using refillable electrodes Unscrew the small refill cap to open the refill hole during measurements. After measurement replace the refill hole cap.
The display will then show the default temperature (25°C in HI 931402 or 20°C in HI 931410) or the last recorded temperature reading (HI 931402 only). "°C" is blinking. °C ºC °C Note the temperature of the sample using a ChecktempC or a glass thermometer. Use the UP or DOWN arrow keys to manually adjust the display reading to the value of the reference thermometer.
oxidizing or reducing power of the sample tested. To correctly perform an ORP measurement, the surface of the ORP electrode must be clean and smooth. When not in use, the tip of the electrode should be kept moist and safe from any mechanical stress which might cause damage to the glass/ platinum junction. pH RANGE mV 4 cm (1½") To get into the "mV" mode (ORP or ISE measurements) turn the instrument ON and press the RANGE (HI 931402) or the pH/mV (HI 931410) key.
TEMPERATURE MEASUREMENTS Taking a temperature measurement is very easy. Connect the temperature probe to the instrument and turn the instrument ON. Dip the liquid/general purpose temperature probe HI 7669/2W into the sample and allow the reading on the secondary display to stabilize (1 or 2 minutes). The temperature value will be displayed on the secondary LCD for HI 931402 and on the left LCD for HI 931410.
RESET BUTTON The RESET button (see page 4, #5 for HI 931402, or page 6, #3 for HI 931410) is 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 necessary to press the reset button and restart the entire operation. Calibration points should remain memorized. It is recommended to verify calibration before proceeding.
pH CALIBRATION It is recommended to calibrate the instrument frequently, especially if high accuracy is required. The instrument should be re-calibrated for pH: • Whenever the pH electrode or temperature probe is replaced. • At least once a month. • After testing aggressive chemicals. • After cleaning procedure and changing the reference electrolyte. • If greatest accuracy is required. HI 70 04 PREPARATION Pour small quantities of the buffer solutions into clean beakers.
PROCEDURE FOR HI 931402 Calibration of HI 931402 has a choice of 5 memorized standard buffers: 4.01, 6.86, 7.01, 9.18 and 10.01 pH. • Make sure that the meter is in pH mode. • Remove the protective cap from the electrode and rinse it with some of the buffer calibration solution you are going to use first. ONE POINT CALIBRATION One point calibration at pH 6.86 (NBS): • Immerse the pH electrode and the temperature probe into pH 6.86 buffer solution and shake briefly.
Only when the reading is stable, "READY" and "CON" will blink. • Press the CFM key to conCFM firm the calibration. If the reading is not close to the selected buffer, "WRONG " and "WRONG " will blink alternatively. If the reading is close to the selected 1 buffer, the meter stores the reading (and adjusts the offset point). The buffer value is then displayed on the primary 1 LCD and the secondary LCD will display "4.01".
• Press the °C key twice. The secondary display will change to “7.01”. °C CAL BUF 1 pH • When the electrode is submerged in the buffer solution the meter will notify the user the reading is not stable. If the readings fluctuate the LCD will blink “NOT READY”. Only when the reading is stable, “READY” and “CON” will blink. NOT READY READY CON • Press the CFM key to confirm the calibration. If the reading is not close to the selected buffer, “WRONG ” and “WRONG ” will blink alternatively.
TWO POINT CALIBRATION A two point calibration is recommended for best accuracy. As a second point use pH 4.01 if you are going to measure acid samples (pH 7 or less), use pH 9.18 or pH 10.01 if you are going to measure alkaline samples. Two point calibration at pH 6.86 and pH 4.01 or pH 9.18 (NBS): • Proceed as described in “One point calibration at pH 6.86” but do not quit calibration by pressing the CAL key at the end.
The values will be stored in memory and the meter will return to the operating mode. Two point calibration at pH 7.01 and pH 4.01 or pH 10.01 (STANDARD): • Proceed as described in “One point calibration at pH 7.01” but do not quit calibration by pressing the CAL key at the end. • After the first calibration point is confirmed, immerse the pH electrode and the temperature probe into the second buffer solution (pH 4.01 or pH 10.01) and shake briefly.
Note: during calibration, the secondary LCD displays 1 the selected buffer value. By pressing the RANGE key the temperature value can be also displayed. pH CAL BUF RANGE pH pH CAL BUF 1 °C This will allow you to check the buffer temperature during calibration.
PROCEDURE FOR HI 931410 HI 931410 provides three technical pre-programmed calibration buffers: t1, t2, t3 i.e. pH 7.01, 4.01, 10.01 respectively. When the ATC probe is not used, make sure the temperature is set manually to reflect the temperature of the solution (see page 26). • Switch the instrument on after connecting the pH electrode and the temperature probe. ON ONE POINT CALIBRATION • Immerse the pH electrode and the temperature probe into a pH 7.01 buffer solution.
• Allow 1-2 minutes for the pH reading to stabilize. The pH reading will be temperature compensated. E.g. if the buffer temperature is at 25°C, the right display will show "pH 7.01". If the buffer temperature is at 20°C, the display will show "pH 7.03" (see page 26). °C pH If "Err4" appears the calibration solution is wrong. Repeat the process using fresh buffers Note: If you are not using the ATC probe, refer to page 26 to manually correct for temperature.
4 cm (1½") Note: the electrode should be submerged approximately 4 cm (1½") into the solution. The temperature probe should be located as close as possible to the pH electrode. • Rinse the electrode and the temperature probe before immersing them into pH 4.01/ pH10.01 calibration buffer, shake briefly and wait for thermal equilibrium. • The meter automatically recognizes the buffer value and prompts for the second at "t2" (pH 4.01, acid) or "t3" (pH 10.01, alkaline).
• If the reading is drifting, turn the meter off and repeat the calibration procedure waiting longer time for the reading to stabilize. However, usually 1 or 2 minutes are enough to prevent drifting of the reading. Note: If you need to unplug the instrument, press the OFF key thus switching the instrument off before disconnecting the power cord. In this way the instrument will retain the calibration data. Otherwise, re-calibration might be necessary.
pH VALUES AT VARIOUS TEMPERATURE Temperature has an effect on pH. The calibration buffer solutions are effected 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. For manual temperature compensation please refer to the following chart.
TEMPERATURE AND mV CALIBRATION All Hanna bench-top pH meters have been factory calibrated for the temperature and mV and is ready for measurements. The temperature probes and ORP electrodes are interchangeable and no temperature or mV calibration is needed when the temperature probe or the ORP electrode is replaced. If, for any reason, the temperature or the mV measurements are out of accuracy, the temperature or the mV re-calibration should be carried out.
INTERFACE WITH PC (HI931402 ONLY) Data transmission from the instrument to the PC is now much easier with the new HI 92000 Windows® compatible application software offered by Hanna Instruments. User friendly, HI 92000 offers a variety of features and has an on line help feature to support you throughout all situations. HI92000 allows you to use the powerful means of the most diffused spread sheet programs (e.g. Excel©, Lotus 1-2-3©).
ADDITIONAL CALIBRATION PROCEDURES & INFORMATION FOR HI 931402 ONLY (for technical personnel only) For HI931402 only, you can perform the temperature and mV calibration as follows. TEMPERATURE CALIBRATION OF HI931402 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.
• Immerse the temperature probe in the vessel with hot water. • When the temperature reading has stabilized, use the °C and °C keys to set the reading on the secondary LCD to the noted temperature of the hot water. • Press CFM key. The primary LCD section will show "390.0 mV". • Complete your temperature calibration by pressing the CAL key if you do not want to perform the mV calibration mode.
Setting the Baud Rate and the Command Prefix The transmission speed (baud rate) of your HI 931402 and of the external device must be the same. To set the baud rate of the meter press the COMM key, the primary LCD shows the current baud rate. The following baud rate can be selected through the °C and °C keys: 150, 300, 600, 1200 (factory setting) and 2400. Press the CFM key to confirm the setting and the primary LCD shows the current command prefix; 16 is the factory setting.
This line makes the computer send a Data Link Escape character, the command expressed as a number or a 3-character sequence) and a CR character. Note: Windows Terminal® and all the other terminal programs that support the ANSI escape sequence, represent the DLE character by the string '^P' and the CR character by the string '^M'. E.g. the line '^PPHR^M' sets the range to pH.
TROUBLESHOOTING FOR HI 931402 Symptoms Problem The meter does not work with the temperature probe The meter fails to calibrate or gives faulty readings Defective ATC probe Replace the probe Defective pH electrode Replace the electrode The meter is slow in responding or gives faulty readouts The electrode is not working or the reference junction is clogged Leave the electrode in a storage solution after cleaning the junction.
TROUBLESHOOTING FOR HI 931410 Symptoms are: The Problem is: The instrument A defective ATC does not work with Probe the HI 7669/2W probe Possible Solutions: The meter fails to A defective pH calibrate or gives electrode erroneous results Replace the electrode and repeat the pH calibration. The meter is slow in responding or gives erroneous readouts Leave the electrode in a storage solution after cleaning the diaphragm. If the problem is not solved, replace the electrode and re-calibrate the pH scale.
ELECTRODE CONDITIONING AND MAINTENANCE Reference Filling Hole Reference Filling Hole Sensitive Wire Reference Wire Reference Wire Sensitive Wire Reference Junction Reference Junction Glass Bulb Glass Bulb Plastic Body pH Electrode Reference Wire Reference Junction Platinum or Gold tip Glass Body pH Electrode Reference Wire Reference Junction Platinum or Gold tip Plastic Body ORP Electrode Glass Body ORP Electrode PREPARATION Remove the protective cap.
"shaking down" the electrode as you would do with a glass thermometer. If the bulb and/or junction are dry, soak the electrode in HI70300 or HI 80300 Storage Solution for at least one hour. For refillable electrodes: If the filling solution (electrolyte) is more than 1 cm (½") 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.
PERIODIC MAINTENANCE Inspect the electrode and the cable. The cable used for connection to the meter 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.
TROUBLESHOOTING Evaluate your electrode performance based on the following. • Noise (Readings fluctuate up and down) could be due to: - Clogged/Dirty Junction: Refer to the Cleaning Procedure above. - Loss of shielding due to low electrolyte level (in refillable electrodes only): refill with fresh HI 7071 or HI 8071 for single junction or HI 7082 or HI 8082 for double junction electrodes. • Dry Membrane/Junction: Soak in Storage Solution HI 70300 or HI 80300 for at least 1 hour.
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 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 10°C.
Typical Electrode Life Ambient Temperature 1- 3 years 90 °C Less than 4 months 120°C Less than 1 month 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.
ACCESSORIES pH CALIBRATION SOLUTIONS: HI77400P pH 4.01 & 7.01 Buffer Solution, 20 mL sachet, 5 pcs each HI7004M pH 4.01 Buffer Solution, 230 mL HI7004L pH 4.01 Buffer Solution, 460 mL HI7006M pH 6.86 Buffer Solution, 230 mL HI7006L pH 6.86 Buffer Solution, 460 mL HI77700P pH 7.01 Buffer Sol. 10x20 mL HI7007M pH 7.01 Buffer Solution, 230 mL HI7007L pH 7.01 Buffer Solution, 460 mL HI7009M pH 9.18 Buffer Solution, 230 mL HI7009L pH 9.18 Buffer Solution, 460 mL HI770710P pH 7.01 & 10.
HI7073L HI7074M HI7074L HI7077M HI7077L Protein Cleaning Sol., 460 mL Inorganic Cleaning Sol., 230 mL Inorganic Cleaning Sol., 460 mL Oil & Fat Cleaning Sol., 230 mL Oil & Fat Cleaning Sol.
pH & ORP ELECTRODES: B = BNC CONNECTION PLUG + 1 m (3.3’) CABLE S = SCREW-TYPE CONNECTOR HI 1043B / HI 1040S 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 / HI1050S 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, nonrefillable, combination pH electrode.
HI 1330B / HI 1310S Glass-body, semimicro, single junction, refillable, combination pH electrode. Use: laboratory. 5mm DIA 0.2" 5mm 0.2" HI 1330 120 mm 4.7" "S" VERSION HI 1331B / HI 1311S 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 / HI 1210S Plastic-body (Ultem®), double junction, gel-filled, combination pH electrode. Use: general purpose. 12 mm 0.5" HI 1230 "S" VERSION 120 mm 4.
FC100B 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 / FC 200S Plastic-body (Kynar®), single junction, conic, Viscolene, refillable, combination pH electrode. Use: meat & cheese. 6 mm 0.25" FC 200 75 mm 2.95" FC210B Glass-body, double junction, conic, Viscolene, combination pH electrode. Use: milk, yogurt. 12 mm 0.5" FC 210 120 mm 4.
FC911B 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 / HI 1410S Glass-body, single junction, flat tip, Viscolene, 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 halfcell 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 / HI 3111S Glass-body, refillable, combination platinum ORP electrode. Use: titration. 12 mm 0.5" HI 3131 150 mm 5.9" "S" VERSION HI 3230B / HI 3210S Plastic-body (Ultem®), gel-filled, combination platinum ORP electrode. Use: general purpose. 12 mm 0.5" HI 3230 120 mm 4.
EXTENSION CABLES FOR SCREW-TYPE ELECTRODES ONLY (SCREW TO BNC CONNECTOR): HI 7855 SERIES CABLE CONNECTORS CONNECTOR AND 3.0 mm (0.12") CABLE WITH BNC CONNECT TO THE BNC SOCKET OF THE METER CONNECT TO SCREW TYPE ELECTRODES HI7855/1 HI7855/3 HI7855/5 HI7855/10 HI7855/15 Extension cable 1m (3.3') long Extension cable 3m (9.9') long Extension cable 5m (16.5') long Extension cable 10m (33') long Extension cable 15m (49.
OTHER ACCESSORIES: ChecktempC HI76405 HI 7669/2W HI 8427 HI 92000 HI 920010 HI 931001 Pocket-size thermometer with penetration probe and 0.1°C resolution (range -50.0 to 150.0°C) Electrode holder 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 (HI 7858/1) Windows® compatible application software PC connection cable pH and ORP electrode simulator with display with 1 m (3.
ELECTRODE APPLICATION REFERENCE GUIDE Application 1. Aquarium Electrodes HI 1332B, HI 1911B, HI 1312S 2. Bath-water HI 1910B, HI 1130B, HI 1110S 3. Beer HI 1131B, HI 1111S 4. Bread HI 2031B, FC 200B, HI 2020S, FC 200S 5. Cheese FC 200B, FC200S 6. Dairy products FC 911B, FC 100B 7. Dirty water HI 1910B, HI 1912B 8. Emulsions HI 1053B, HI 1050S 9. Environment HI 1230B, HI 1210S 10. Flasks HI 1331B, HI 1310S 11. Food industry general use FC 911B, FC 100B 12.
WARRANTY All Hanna Instruments meters are warranted for two years against defects in workmanship and materials when used for their intended purpose and maintained according to the instructions. The electrodes and probes are warranted for a period of six months. Damages due to accidents, misuse, tampering or lack of prescribed maintenance are not covered. This warranty is limited to repair or replacement free of charge. If service is required, contact the dealer from whom you purchased the instrument.
CE DECLARATION OF CONFORMITY DECLARATION OF CONFORMITY We Hanna Instruments Srl V.le delle industrie 12 35010 Ronchi di Villafranca (PD) ITALY herewith certify that the bench pH meters HI 931402 HI 931410 have been tested and found to be in compliance with the following regulations: IEC 801-2 IEC 801-3 IEC 801-4 EN 55022 Electrostatic Discharge RF Radiated Fast Transient Radiated, Class B Date of Issue: 01-02-1996 D.Volpato - Engineering Manager On behalf of Hanna Instruments S.r.l.
PRINTED IN ITALY MANPHBN3R2 03/96 h t t p : / / w w w . h a n n a i n s t .
