Instruction Manual HI9624 - HI 9625 HI 96240 - HI 96250 Portable Waterproof GLP pH/°C Meters with Calibration Data Storage This instrument is in Compliance with the CE Directives H T T P : / / WWW.HANNAINST.
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 the directives. TABLE OF CONTENTS General Description ..................................... 3 Preliminary Examination .............................
PRELIMINARY EXAMINATION Remove the instrument from the packing material and examine it carefully to make sure that no damage has occurred during shipping. If noticeable damage is found, notify your Dealer. Each pH meter is supplied complete with: • HI1230B Combination pH Electrode • HI7669/2W Temperature Probe • 1.5V AA size Alkaline Batteries (4 pcs) • pH4, pH7 buffer and cleaning solutions (20 mL each) • 12VDC power adapter • Rugged Carrying Case.
With HI9625 and HI96250 you can also measure ORP (Oxidation Reduction Potential) or Ion Specific (ISE). mV measurements automatically switch from 0.1 to 1 mV resolution when the reading reaches 400 mV. All pH measurements are automatically compensated for temperature changes (ATC) when used with the supplied temperature probe. It is possible to connect the HI96240 and HI96250 to a PC through the RS232C serial port for monitoring data via computer.
LCD DISPLAY FUNCTIONAL DESCRIPTION 1 mV CFM WRONG CAL pH DATE °C mV pH 1 BUF 2 3 1. Primary Display 2.
FUNCTIONAL DESCRIPTION OF HI 9624 & HI 96240 3 1 2 5 1 3 2 4 5 pH pH °C °C HI 9624 MICROCOMPUTER pH METER 6 6 HI 96240 MICROCOMPUTER pH METER 12 7 12 7 11 ON / OFF 10 8 ALT CAL 8 CFM 11 ON / OFF 10 ALT CAL CFM 9 RANGE 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12.
SPECIFICATIONS OF HI 9624 & HI 96240 HI 9624 HI 96240 Range pH °C 0.00 to 14.00 0.0 to 100.0 Resolution pH °C 0.01 0.1 Accuracy (@20°C/68°F) pH °C +0.01 +0.5 Typical EMC Deviation pH °C +0.01 +0.5 Calibration Automatic 1, 2 or 3 points with pH 4.01, 6.86, 7.01, 9.18 and 10 .
FUNCTIONAL DESCRIPTION OF HI 9625 & HI 96250 3 1 2 5 1 3 2 4 5 pH pH °C °C HI 9625 MICROCOMPUTER pH METER 6 6 HI 96250 MICROCOMPUTER pH METER 12 7 12 7 11 ON / OFF 10 8 ALT CAL 8 CFM 11 ON / OFF 10 ALT CAL CFM 9 RANGE 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12.
SPECIFICATIONS OF HI 9625 & HI 96250 HI 9625 HI 96250 Range pH ISE (mV) ORP (mV) °C 0.00 to 14.00 ±399.9 ±1999 0.0 to 100.0 Resolution pH ISE (mV) ORP (mV) °C 0.01 0.1 1 0.1 Accuracy pH (@20°C/68°F) ISE (mV) ORP (mV) °C +0.01 ±0.2 ±1 +0.5 Typical EMC Deviation +0.01 ±1 +0.5 pH mV °C Calibration Automatic 1, 2 or 3 points with pH 4.01, 6.86, 7.01, 9.18 and 10 .
OPERATIONAL GUIDE INITIAL PREPARATION Each meter is supplied complete with batteries. Remove the back cover, unwrap the batteries and install them while paying attention to the polarity. PROBES CONNECTION To prepare the instrument for use connect the pH electrode to the BNC socket on the top of the instrument. Connect the temperature probe to the RCA socket.
To switch the instruments on, press and hold the ON/OFF key. The meter has a built-in pro- ON/OFF tection against electromagnetic interference and the delayed response of the keys assures that the commands are not mistaken for stray signals. Before proceeding with pH measurements follow the calibration procedure (see page 19). SETTING DATE AND TIME Press the ALT and the TIME keys simultaneously. The display will show the date setting. At the bottom of the display the year will be blinking.
Select the month by using the UP or the DOWN arrow keys. CAL CFM Press the TIME key. The day will start blinking. DATE TIME Use the UP or the DOWN arrow key to select the correct day. CAL CFM Press the ALT and the TIME keys simultaneously. The display will now show the clock time and the hour will start blinking. TIME ALT To select the hour, press the UP or the DOWN arrow keys (24 hour clock).
Press the TIME key once and the minutes will start blinking. TIME Use the UP or the DOWN arrow keys to select the minutes. CAL CFM Press the ALT and the TIME keys simultaneously to leave this mode. TIME ALT The date and time are now set and stored in the memory even when the meter is switched off.
VIEWING DATE / TIME / pH / mV** / TEMPERATURE Press the RANGE key to display the pH measurement mode: the pH reading is on the primary display, and the temperature is on the secondary one. pH °C RANGE Press the RANGE key again (for HI 9625 and HI 96250 only) to display mV measurements together with the temperature (by pressing the same key you can switch from pH and mV measurement mode and vice-versa). mV °C RANGE To view the time press the TIME key and the display will show hour and minutes.
TO VIEW pH CALIBRATION DATA Press the CAL DATA key and the meter will display the last calibration data, in the following sequence: - CAL indicator with month, day and year DATE CAL CAL DATA Press the CAL DATA key again and the meter will display the last calibration time as: - CAL indicator with hour and minutes.
Press the CAL DATA key again, the display will show the first slope calibration factor as: - CAL indicator with pH slope 1st value - pH slope 1st calibration buffer value (BUF2) CAL pH BUF 2 CAL DATA Press the CAL DATA key again to display the second slope calibration factor as: - CAL indicator with pH slope 2nd value - pH slope 2nd calibration buffer value (BUF3). CAL pH BUF 3 CAL DATA Press the CAL DATA key again to resume to normal operation.
TAKING pH MEASUREMENTS Secure the connections of the pH electrode and the temperature probe to the top of the meter. If possible, use plastic beakers to minimize any EMC interferences. To take pH measurements, simply submerge the bottom 4 cm (1½") of the electrode and the temperature probe in 4 cm the solution to be tested, stir (1½") gently and allow for the electrode to adjust and stabilize. Press the RANGE key to get into the pH mode.
TEMPERATURE EFFECT ON pH The pH reading is directly effected by temperature. In order for the meter to measure the pH accurately, temperature must be taken in consideration. A perfect equilibrium between the pH electrode and the sample is reached in approximately 15 minutes. To use the meter's Automatic Temperature Compensation feature, submerge the temperature probe into the sample as close to the electrode as possible and wait for 1-2 minutes.
ORP MEASUREMENTS (HI 9625 & HI 96250) HI 9625 and HI96250 have the capability to take ORP measurements. An optional ORP electrode must be used to perform these measurements. Secure the connection of the ORP electrode to the BNC socket located on the top of the meter. If possible, use plastic beakers to minimize any EMC interferences. To get into the "mV" mode (ORP or ISE) press the RANGE key until the display changes to mV.
TAKING TEMPERATURE MEASUREMENTS The HI7669/2W temperature probe that is supplied with HI 9624, HI 96240, HI 9625 and HI 96250 is a liquid/general purpose probe. Taking a temperature measurement with these meters is very easy. The temperature is always displayed on the secondary LCD. mV pH °C °C Secure the connection of the probe to the top of the meter, and take the measurement (allow 1 or 2 minutes for the temperature to stabilize). If the temperature probe is disconnected, the meter will display "25.
pH CALIBRATION For greatest accuracy, it is recommended that the instrument is calibrated frequently. For a faster operation, it is possible to standardize the electrode at pH 7.01 only (one point calibration), but it is always good practice to calibrate at least 2 points. The standard calibration program of the meter, however, is prepared for 3 (maximum) buffers. There is a choice of 5 memorized standard buffers: 1st buffer (offset) pH 6.86 or 7.01 pH 4.
buffer solution, the first one for rinsing the electrode, the second one for calibration. By doing this, contamination between the buffers is minimized. To get accurate readings, use pH 7.01 (or pH 6.86) and pH 4.01 if you are going to measure acid samples, or pH 7.01 and pH 10.01 (or pH 9.18) for alkaline measurements. A 3-point calibration can also be performed (pH 7.01, 4.01 and 10.01). • Press the RANGE key to get into the pH mode.
• When the “CFM” indicator starts blinking, the calibration can be confirmed. Press the ALT and CFM keys simultaneously to confirm the first buffer. CFM ALT CFM • If everything is satisfactory the secondary LCD will show “4.01” expecting the second buffer at pH 4.01. • If the buffer is out of the offset range, "WRONG " as error message will blink. CAL pH BUF 2 WRONG BUF Note: If a single point calibration is required, press ALT and CAL keys to leave the calibration mode.
4 cm (1½") • Rinse the electrode with some of the second buffer solution (e.g. pH 4.01). Dip the bottom 4 cm (1½") of the electrode and the temperature probe into a beaker containing the second buffer. • When the "CFM" indicator starts blinking, indicating that the electrode has been stabilized, press the ALT and CFM keys to confirm the second calibration point. HI 7004 CFM ALT CFM • If the buffer is out of the slope range, "WRONG " will blink.
4 cm (1½") • Rinse the electrode with some pH 10.01 (or pH 9.18) solution. Dip the bottom 4 cm (1½") of the electrode in a beaker containing the third buffer. • When the CFM indicator starts blinking, indicating that the electrode has stabilized, press the ALT and CFM keys to confirm the third calibration point. HI 7010 CFM ALT CFM • If the buffer is out of the slope range, "WRONG " will blink. Press the ALT and CAL keys simultaneously and recalibrate the value.
During calibration, the characteristics of the electrode will be memorized, and can be recalled by pressing the CAL DATA key (see operational guide on page 13). This operation will display: • date DATE CAL CAL DATA • time CAL CAL DATA • the offset characteristic of the electrode in pH units pH CAL BUF 1 pH CAL DATA • the 1st slope in percentage of the theoretical value CAL pH BUF 2 CAL DATA • the 2nd slope in percentage of the theoretical value.
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 temperature (if used in conjunction with the HI7669/2W temperature probe) or to the manually set temperature. TEMP °C °F 4.01 6.86 0 5 10 15 20 25 30 35 40 45 50 55 60 65 70 4.01 4.00 4.00 4.00 4.00 4.01 4.02 4.03 4.04 4.05 4.
TEMPERATURE AND mV CALIBRATION Each meter has 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.
RS232C OUTPUT (HI96240 & HI96250) Connect the HI 96240 or the HI 96250 to a PC through the RS232C output (the connector is located on the top of the meter). SPECIFICATIONS: Baud Rate: Start bit: Stop bit: Parity bit: Command Prefix: Isolated 2400 1 1 none DLE SENDING COMMANDS FROM PC With terminal programs such as Telix® and Windows Terminal®, it is possible to remotely control your pH meter.
Commands not requiring an answer from the pH meter: PHR sets the range to pH MVR sets the range to mV (for HI 96250 only) Commands requiring an answer: PH? Causes the meter to send the pH value (6 characters). If the reading is out of range "Err 1" is sent. E.g. "14.00" + cr for pH 14.00 MV? Causes the meter to send the mV value (5 or 6 characters). If the reading is out of range "Err 2" is sent. E.g. "-399.9" + cr for -399.
offset buffer is pH 7.01, offset factor is 0.00 pH slope 1st is pH 4.01, slope 1 factor is 100% slope 2nd is pH 10.01, slope 1 factor is 100% Note: The meter will send if a corrupted or unknown command is received. These commands may be sent with either capital or small letters. Invalid commands will be ignored. The characters sent by the pH meter are always capital letters.
ELECTRODE CONDITIONING AND MAINTENANCE Reference Filling Hole Reference Filling Hole Fill Hole Screw 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 Plastic Body ORP Electrode Reference Junction Platinum or Gold tip Glass Body ORP Electrode PREPARATION Remove the protective cap.
tions. These bubbles can be removed by "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.
tion or HI 7082 or HI 8082 for double junction electrodes). Follow the Preparation Procedure above before taking measurements. Note: NEVER STORE THE ELECTRODE IN DISTILLED WATER OR DRY. PERIODIC MAINTENANCE Inspect the electrode and the cable. The cable used for the 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.
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 HI 70300 or HI 80300 Storage Solution for at least 1 hour before taking measurements. TROUBLESHOOTING Evaluate your electrode performance based on the following.
BATTERY REPLACEMENT When the batteries are run down an extra decimal point is displayed on the Liquid Crystal Display to warn the user. Battery replacement must only take place in a non hazardous area using the battery types specified in this instruction manual (see page 46). In order to replace run down batteries, simply remove the two screws on the rear cover of the instrument and replace the four 1.5V AA batteries with new ones, paying attention to the correct polarity.
TROUBLESHOOTING GUIDE Symptoms Problem The meter does not work with the temperature probe Defective ATC probe Replace the probe The meter fails to calibrate or gives faulty readings 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.
Symptoms "WRONG 32 " and/or "WRONG " BUF Problem Solution Erroneous Use fresh buffer solution buffer solution used for 2nd slope calibration Defective electrode 38 Replace the electrode
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 readings to be underestimated. Hanna's glass formulations have the indicated characteristics.
ACCESSORIES pH CALIBRATION SOLUTIONS HI774P pH 4.01 & 7.01 Buffer Solution, 30 mL each HI 7004M pH 4.01 Buffer Solution, 230 mL HI 7004L pH 4.01 Buffer Solution, 460 mL HI 7006M pH 6.86 Buffer Solution, 230 mL HI 7006L pH 6.86 Buffer Solution, 460 mL HI777P pH 7.01 Buffer Sol. 2x30 mL HI 7007M pH 7.01 Buffer Solution, 230 mL HI 7007L pH 7.01 Buffer Solution, 460 mL HI 7009M pH 9.18 Buffer Solution, 230 mL HI 7009L pH 9.18 Buffer Solution, 460 mL HI7710P pH 7.01 & 10.
ELECTRODE CLEANING SOLUTIONS HI 7061M General Cleaning Sol., 230 mL HI 7061L General Cleaning Sol., 460 mL HI 7073M Protein Cleaning Sol., 230 mL HI 7073L Protein Cleaning Sol., 460 mL HI 7074M Inorganic Cleaning Sol., 230 mL HI 7074L Inorganic Cleaning Sol., 460 mL HI 7077M Oil & Fat Cleaning Sol., 230 mL HI 7077L Oil & Fat Cleaning Sol.
pH 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 HI1083B Glass-body, micro, Viscolene, nonrefillable, combination pH electrode.
HI 1131B / HI 1111S 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 / 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.
HI 2031B / HI 2020S Glass-body, semimicro, conic, refillable, combination pH electrode. Use: semisolid products. 6 mm 0.25" HI 2031 75 mm 2.95" "S" VERSION HI 1332B / HI 1312S Plastic-body (Ultem®), double junction, refillable, combination pH electrode. Use: general purpose. 12 mm 0.5" HI 1332 "S" VERSION 120 mm 4.7" 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.
FC210B Glass-body, double junction, conic, Viscolene, combination pH electrode. Use: milk, yogurt. 12 mm 0.5" FC 210 120 mm 4.7" FC220B Glass-body, single junction, refillable, combination pH electrode. Use: food & wine processing. 9.5mm DIA 0.37" 12 mm 0.5" FC 220 120 mm 4.7" 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.
Extension cables for screw-type electrodes only (screw to BNC connector) HI7855/1 Extension cable 1m (3.3') long HI7855/3 Extension cable 3m (9.9') long HI7855/5 Extension cable 5m (16.5') long HI7855/10 Extension cable 10m (33') long HI7855/15 Extension cable 15m (49.5') long HI 7855 SERIES CABLE CONNECTORS CONNECTOR AND 3.0 mm (0.
OTHER ACCESSORIES HI 710031 Rugged carrying case HI 721308 1.5V AA alkaline battery (10 pcs) HI 76405 Electrode holder HI 7669/2W Temperature probe with 1 m (3.3') screened cable HI 92000/16 Windows® 3.
ELECTRODE APPLICATION REFERENCE GUIDE Application Electrodes 1. Aquarium 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, FC 200S 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 instructions. The electrodes and the probes are warranted for a period of six months. This warranty is limited to repair or replacement free of charge. Damages due to accident, misuse, tampering or lack of prescribed maintenance are not covered. 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 pH meters HI 9624 HI 9625 HI 96240 HI 96250 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: 15-05-1996 D.Volpato - Engineering Manager On behalf of Hanna Instruments S.r.l.
MAN9624R1 05/96 H T T P : / / W W W . H A N N A I N S T .
