Portable Microprocessor Turbidity Meter
13Pages

Instruction Manual HI 93703 Portable Microprocessor Turbidity Meter

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. If you need additional technical information, do not hesitate to e-mail us at tech@hannainst.com. This instrument is in compliance with the 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...

The meter housing is 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 4 minutes of non-use. The meter is very simple to use: all operations can be carried out with only four keys and troubleshooting functions can be performed with displayed error code guides. An exclusive 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. The one-point calibration at 10 FTU* can...

±5% of reading (whichever is greater) Typical EMC Deviation ±2% FS Light Source Infrared LED Light Source Life Life of the instrument Light Detector Silicon Photocell Battery Type 4 x 1.5V AA alkaline Battery Life Approx. 60 hours of use or 900 measurements Auto-off After 5 minutes of non-use 2) LCD (Liquid Crystal Display) 4) CAL key, to enter the calibration mode 5) READ/ft key, to perform measurements and to set the date (day and month) of the last calibration 6) DATE/^> key, to display the last calibration date and to select either the month or the day of last...

OPERATIONAL GUIDE To prepare the instrument for taking measurements, first install the batteries (see Battery Replacement section on page 17) and then turn the instrument on. To maximize the battery life the meter is automatically switched off after 5 minutes of non-use. To reactivate it, simply press the ON/ OFF key. MEASUREMENT PROCEDURE • Turn the meter on by pressing the ON/OFF key. • The meter will carry out a self-test displaying a full set of figures. After the test, the LCD will change to the measurement mode. • When the LCD displays “----” the meter is ready to measure. • Fill a...

• Even though HI93703 covers a very wide range of turbidity values, for very accurate measurements of samples exceeding 40FTU1, 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 40FTU1) E.g.: HI 93703 reading = 200 FTU 1 3000 / 200 = 15 mL (Vos) 15 mL (Vos)+85 mL (HI 93703-0) = 100 mL At this point, take a sample of this solution and...

SOURCES OF INTERFERENCE • Presence of floating debris and coarse sediments which settle out rapidly will give false readings. • The infrared light source used for HI 93703 turbidity meter, according to ISO 7027 International Standard, can effectively minimize errors due to colored dissolved substances. This effect, named "true color", is a common interference for most commercially available instruments operating in the range of visible light. • Air bubbles and the effect of vibrations that disturb the surface of the sample will give false results. • Dirty glassware could also affect...

• To confirm the displayed data values and to go to the next step, press the CAL key once. A blinking "ZERO" message will appear. • Take the HI 93703-0 bottle containing the ZERO FTU1 Standard (or turbidity-free dilution water) and fill the measurement cuvette. Note: In order to minimize any error introduced by the cuvette, it is recommended to use, during calibration, the same cuvette you are going to use to perform the measurement. • Insert the cuvette with the HI 93703-0 @ ZERO FTU1 standard solution (or turbidity-free dilution water) into the measurement cell and press the CAL key. A...

HOW TO ENSURE ACCURATE CALIBRATION The instructions listed below should be carefully followed during testing and during calibration: • All glassware that comes into contact with standards should be maintained clean. Wash with HI 93703-50 cleaning solution and rinse with HI 93703-0 or turbidity free water. • Rinse the vial twice with 5 ml of the liquid to be tested. This removes the effect of any previous liquid and any dust or foreign matter that may be present inside. Gently pour the liquid down the side of the vial to reduce air bubbles (no mixing is required when HI 937030 and HI...

BATTERY REPLACEMENT All components have been selected to minimize current drain without compromising functionality. In order to minimize the battery consumption, the meter is equipped with an auto-off function which switches the meter off after 5 minutes of non-use. The power source are 4 alkaline batteries (1.5V AA) with an expected life of 60 hours, or 900 measurements. To always grant accurate measurements, the batteries are monitored to ensure that readings are not taken when there is insufficient power. A "LO BAT" indication will appear on the lower right corner of the display when the...

LCD AND ERROR MESSAGES HI 93703 will display several different LCD messages to help the user throughout all operations. The meter is in a ready state and measurement or calibration can be performed. Calibration mode is active. If the CAL key is not pressed within 6 seconds, the meter will automatically switch to the measurement mode. Calibration date setting mode is active. "Sample In Progress": measurement is being performed. Low battery: when this message appears, the instrument can still perform approx. 50 measurements. Batteries are too weak to ensure reliable measurements. This message...