Instruction Manual HI 93703-11 Portable Microprocessor Turbidity Meter with RS232 Dear Customer, Thank you for choosing a Hanna product. Please 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 more precise idea of its versatility. This instrument is in compliance with the directives EN 50081-1 and EN 50082-1. TABLE OF CONTENTS Preliminary Examination ............................ 3 General Description .................................... 3 Principle of Operation ................................. 5 Functional Description ................................ 6 Specifications ............................................ 7 Operational Guide ...................................... 8 Measurement Procedure ....................... 8 Log-on-demand ................................... 11 Cleaning Logged Data ......................... 11 Viewing Logged Data .......................... 12 Viewing and setting Date and Time ..... 12 Error Codes ......................................... 13 Ensure Accurate Measurements ............. 14 Sources of Interference ....................... 15 Calibration ................................................ 16 Calibration Procedure .......................... 16 Viewing Calibration Date ..................... 18 Ensure Accurate Calibration ................ 18 Standard Suspension .......................... 19 Battery Replacement ............................... 20 RS 232 Connection .................................. 21 Accessories ............................................. 22 Warranty .................................................. 22 CE Declaration of Conformity ................... 23 2 LOG HI 93 703-1 1 188 TDATE % IME LOB AT CLR ON OFF CAL VIEW STO DATE READ LOG MIC GING TUR ROPRO BID C ITY ESSO MET R ER GLP ALT http://www.hannainst.com These Instruments are in Compliance with the CE Directives 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. HI 93703-11 is supplied complete with: · 4 x 1.5V AA Size Batteries (4 ea.) · Glass Cuvet · Cap Note: Save all packing material until you are sure that the instrument functions correctly. Any defective item must be returned in its original packaging with the supplied accessories. GENERAL DESCRIPTION With HI 93703-11 turbidity measurements can be performed with high precision in the field as well as in the laboratory. HI 93703-11 turbidity meter is a microprocessor-based, battery operated instrument used to determine the turbidity of water and waste-water. The meter covers a 0-1000 FTU range in two scales: 0.00 to 50.00 FTU and 50 to 1000 FTU. The autoranging feature of the instrument sets the appropriate range for the measurement. HI 93703-11 also includes a real-time clock, log-on-demand and RS-232 capability. The serial interface is through serial port (9-pin or 25-pin) of an IBM-compatible computer and the 5-pin socket on the meter. Note: HI 93703-11 has been designed according to the ISO 7027 International Standard, consequently the turbidity measurement units are expressed in FTU (Formazine Turbidity Unit). FTU is identical to the other internationally recognized unit: NTU (Nephelometric Turbidity Unit). 3 HI 93703-11 is a portable turbidity meter with the mark, in compliance with the European directives EN 50081-1 and EN 50082-1, ensuring low emission values and accurate measurements in presence of electromagnetic fields. The meter is housed in a rugged and lightweight case, with an easy-to-read LCD. To save battery-life, the instrument is equipped with an automatic shut-off feature which is activated after 5-minutes of non-use. This feature is disabled when the meter is connected to the serial port of the computer. HI 93703-11 is simple to use. All operations can be carried out with only five keys and troubleshooting functions can be performed with displayed error code guides. A positive-locking system guarantees that the cuvet is firmly placed in the cell. The keypad is water-resistant and can be wiped with a moist cloth for quick cleanups. Two or three points calibration (0,10, 500 FTU*) can be easily performed using available standards. In addition, HI 93703-11 automatically stores the last calibration date, that may be retrieved by a single key touch. We have chosen 10 FTU * as the standard calibration point because it best fits the water turbidity measurements in different applications, from drinking water to wastewater treatment. Hanna uses the primary standard AMCO-AEPA1 to avoid all formazine-related problems. Formazine is a toxic, unstable substance, which requires particular care: its standards have to be prepared only a few minutes before performing the calibration, and cannot be reused because of their short life. Hanna standards are extremely stable, can be reused, and last up to six months, if free from contamination. HI 9370311 can be used with both standards. * 1 FTU = 1 NTU 4 PRINCIPLE OF OPERATION HI 93703-11 has been designed to perform measurements according to the ISO 7027 International Standard. The instrument functions by passing a beam of infrared light through a vial containing the sample being measured. LIGHT DETECTOR IR LED EMITTED LIGHT (890 nm) 90° SCATTERED LIGHT 2 8 FUNCTIONAL DESCRIPTION 1 LOG 188 LOBAT DATE % TIME CUVET HI 93703-11 A sensor, positioned at 90° with respect to the direction of light, detects the amount of light scattered by the undissolved particles present in the sample. The microprocessor converts such readings into FTU* values. As noted above, FTU unit is equal to the NTU unit. However, there are other known measurement units for turbidity: Jackson Turbidity Unit (JTU) based on the old method of Jackson's candle, and Silica Unit (mg /L of SiO2). For your reference the conversion table between these measurement units is shown below: CLR VIEW 3 ON OFF 5 STO DATE CAL 4 GLP READ 6 LOGGING ALT MICROPROCESSOR LOGGING TURBIDITY METER MICROPROCESSOR TURBIDITY METER 7 JTU JTU FTU /NTU SiO2 (mg /L) 1 0.053 0.4 FTU/NTU 19 1 7.5 SiO2 (mg / L) 2.5 0.13 1 1) 2) 3) 4) 5) 6) 7) 8) 5 * 1 FTU = 1 NTU Measurement Cell LCD (Liquid Crystal Display) ON/OFF key / CLR key, to clear log memory GLP key, to display last calibration date/ time / CAL key, to enter the Calibration Mode STO key, to store sample after reading / VIEW key, to view log memory READ key, to perform measurements / DATE key to display (toggle) current date/ time ALT key, to activate the ALT functions (second function keys in orange) RS 232 5-pin connector 6 SPECIFICATIONS OPERATIONAL GUIDE To prepare the instrument for taking measurements, first install the batteries (see Battery Replacement section on page 20) and then turn the instrument on. To maximize battery-life, the display is automatically switched off after 5-minutes of non-use. To reactivate the display, simply press the ON/OFF key. MEASUREMENT PROCEDURE: HI 93703-11 CLR ON OFF HI93703 Range Resolution Accuracy 0.00 to 50.00 FTU * 50 to 1000 FTU * 0.01 and 1 FTU * ±0.5 FTU* ±5% of reading (whichever greater) ±2% Full Scale High Emission Infrared LED Life of the instrument Silicon Photocell 4 x 1.5V AA alkaline batteries 60 hours or 900 measurements After 5 minutes 0 to 50°C (32 to 122°F); 0 to 95% RH (non-condensing) 220 x 82 x 66 mm (8.7 x 3.2 x 2.6") 510 g (18 oz.) EMC Typical Deviation Light Source Light Source Life Light Detector Power Source Battery Life Auto-Shut off Operating Conditions Dimensions Weight · Turn the meter on by pressing the ON/OFF key. VIEW STO DATE READ CAL GLP LOGGING MICROPROCESSOR TURBIDITY METER ALT · The meter will carry out a self-test displaying a full set of figures. · The meter will carry out a battery test showing in percentage the battery life left. · When the LCD displays "----" the meter is ready to measure. LOG 188 DATE % TIME LOBAT 98 ba % · Fill a clean cuvet up to one quarter inch (0.5 cm) from its rim with the thoroughly agitated sample. · Allow sufficient time for bubbles to escape before securing the cap. Note: do not overtighten the cap. * 1 FTU = 1 NTU 1/4" 0.5 cm 7 8 NOTE: Wipe the cuvet thoroughly with a lintfree tissue (HI 93703-70) before inserting into the measurement cell. The cuvet must be completely free of fingerprints and other oil or dirt, particularly in the area where the light goes through (approx. the bottom 2 cm/1"). · Place the cuvet into the cell and check that the notch on the cap is positioned securely into the groove. · Even though HI93703-11 covers a very wide range of turbidity values, for very accurate measurements of samples exceeding 40 FTU *, Standard Methods require dilution. In such cases, the correct amount of HI 93703-0 or turbidity-free water to be added to the sample can be calculated as follows: Vos = 3000 / T where: Vos = volume of sample (mL) to be combined with HI 93703-0 to obtain the final volume of 100 mL. T = HI 93703 reading (exceeding 40FTU*) E.g.: HI 93703 reading = 200 FTU * 3000 / 200 = 15 mL (Vos) 15 mL (Vos)+85 mL (HI 93703-0) = 100 mL · The mark on the cuvet cap should point towards the LCD. At this point, take a sample of this solution and measure its turbidity. The correct turbidity value of the original sample will be: Tn x 100 mL / Vos = Ta · Press the READ key and the LCD will display a blinking "SIP" (Sampling in Process). The turbidity value will appear after approx. 20 seconds. HI 93703-11 CLR ON OFF VIEW STO DATE READ where: Tn = new HI 93703 reading Ta = actual turbidity value of the original sample E.g. If Tn = 27 FTU * Ta = 27 FTU *x100 mL / 15 mL = 180 FTU * CAL GLP LOGGING MICROPROCESSOR TURBIDITY METER ALT 51 NOTE: Any sample taken above 1000 FTU will show out of range by blinking "1000". 9 * 1 FTU = 1 NTU 10 LOG-ON-DEMAND: · After taking a read- HI 93703-11 ing, press the STO button. The last sample read will be stored in memory. The display will also show on the bottom right corner the reference number of the stored sample. CLR ON OFF VIEWING LOGGED DATA: · Press the ALT & VIEW buttons together. The last sample will be displayed. HI 93703-11 CLR ON OFF VIEW STO DATE READ VIEW STO CAL GLP CAL DATE GLP READ LOGGING MICROPROCESSOR TURBIDITY METER LOGGING MICROPROCESSOR TURBIDITY METER LOGGING MICROPROCESSOR TURBIDITY METER ALT ALT HI 93703-11 NOTE: When the maximum number of samples has been reached (199), the LCD display will show "FULL". This is a warning that you will be overwriting the oldest sample recorded. To store the current sample, press the STO button again and this will overwrite the oldest sample in the memory. All samples are shifted (reference numbers reduced by one). Sample number one remains the oldest sample. FULL · Press the right arrow to scroll between turbidity value, date and time of the sample. CLR ON OFF VIEW STO DATE READ CAL GLP LOGGING MICROPROCESSOR TURBIDITY METER ALT HI 93703-11 · Press the UP/DOWN arrows to view the samples and use the right arrow to scroll the date and time . CLR ON OFF VIEW STO DATE READ CAL GLP LOGGING MICROPROCESSOR TURBIDITY METER ALT CLEARING LOGGED DATA: HI 93703-11 · Press ALT & VIEW again to exit this mode. VIEWING AND SETTING DATE AND TIME: VIEW STO DATE READ · Press the ALT & CLR buttons together. The display will show "CLR" for confirmation. Press ALT & CLR again to clear memory. To abort the operation, press any button. CLR ON OFF CAL GLP LOGGING MICROPROCESSOR TURBIDITY METER ALT VIEWING: · Press ALT & DATE to toggle between date and time. SETTING: HI 93703-11 CLR ON OFF VIEW STO DATE READ CAL GLP LOGGING MICROPROCESSOR TURBIDITY METER LOGGING MICROPROCESSOR TURBIDITY METER ALT CLR LOG · Press and hold ALT & DATE for 3-4 seconds. HI 93703-11 CLR ON OFF VIEW STO DATE READ ALL SAMPLES PREVIOUSLY STORED WILL BE ERASED FROM MEMORY! 11 · Press UP/DOWN to correct and set the year. 12 CAL GLP LOGGING MICROPROCESSOR TURBIDITY METER ALT · Press right arrow to scroll to month and day, use UP/DOWN to set. · Real Time Clock HI 93703-11 CLR ON OFF VIEW STO DATE READ error err2 err3 err4 CAL GLP · Press right arrow again to scroll to time, use UP/ DOWN to set. LOGGING MICROPROCESSOR TURBIDITY METER ALT · EEPROM error HI 93703-11 CLR VIEW STO DATE READ · Press right arrow again to save and exit date and time setup. ON OFF CAL GLP · Internal communication error LOGGING MICROPROCESSOR TURBIDITY METER ALT NOTE: Press ALT & DATE to leave this mode without saving. LOGGING MICROPROCESSOR TURBIDITY METER · Internal Bus error err5 ERROR CODES: Contact the HANNA office nearest to you. Every time the meter is switched on, the Real Time Clock and EEPROM are tested, and if an error is found the corresponding error code will be displaye ...