User manual HANNA INSTRUMENTS LP2000-11

[. . . ] 5 Functional Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Operational Guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Power Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Measurement Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [. . . ] The microprocessor converts such readings into FTU values. * 1 FTU = 1 NTU * 1 FTU = 1 NTU 4 5 FUNCTIONAL DESCRIPTION OPERATIONAL GUIDE POWER CONNECTION Plug the supplied 12 Vdc adapter into the proper instrument socket and to the mains. Note: Always turn the meter off before unplugging it to ensure no data is lost. MEASUREMENT PROCEDURE · Turn the meter on by pressing the ON/OFF key. · The meter will carry out a self-test by displaying a full set of figures. i. Power supply socket · Allow sufficient time for bubbles to escape before securing the cap. READ/DATE key, to perform measurements and display (toggle) current date/time 4. GLP/CAL key, to display (toggle) last calibration date/time and enter the calibration mode 6. ON/OFF/CLR key to switch the meter ON and OFF, and clear log memory 7. Secondary LCD (displays the year when date is on the primary level, the sample index when storing a value or viewing the log memory) 8. Primary LCD (Liquid Crystal Display) · When the LCD displays "----" the meter is ready to take measurements. · Fill a clean cuvet up to 0. 5 cm (one quarter inch) from its rim with the thoroughly agitated sample. Note: Wipe the cuvet thoroughly with HI 93703-70 or a lint-free tissue before inserting it 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 LP2000-11 covers a wide turbidity range, highly accurate readings exceeding 40 FTU* require dilution as recommended by the Standard Methods. Use the formula below to calculate the amount of HI 93703-0 or turbidity-free water needed for accurate dilution. Vos = 3000 / T where: Vos = volume of original sample (mL) to be added to HI 93703-0 to obtain the total diluted volume of 100 mL. T = LP2000-11 reading (exceeding 40 FTU) E. g. : LP2000-11 reading = 200 FTU* 3000 / 200 = 15 mL (Vos) 15 mL (Vos)+85 mL (HI 93703-0) = 100 mL At this point, take a sample of this diluted solution and measure its turbidity. The correct turbidity value of the original sample is derived by: Ta= Tn x 100 mL / Vos where: Ta = actual turbidity value of the original sample Tn = LP2000-11 reading of the diluted solution E. g. If Tn = 27 Ta = 27 x 100 mL / 15 mL = 180 FTU* Note: Any sample above 1000 FTU* will show out of range by blinking "1000". · The mark on the cuvet cap should point towards the keyboard. · Press the READ key and the LCD will display a blinking "SIP" (Sampling in Process). The turbidity value will appear after approximately 20 seconds. * 1 FTU = 1 NTU 8 9 STORING SAMPLES IN MEMORY · After taking a reading, press the STO button. The last sample read will be stored in memory and the display will also show on the bottom right hand corner the reference number of the stored sample. Note: When the maximum number of samples has been reached (500), the 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 and sample number one is always the oldest sample. VIEWING LOGGED DATA · Press the ALT & VIEW buttons. The last stored sample will be displayed. · Press the right arrow to scroll between turbidity value, date and time sample was taken. · Press the UP/DOWN arrows to scroll between samples taken. CLEARING LOGGED DATA · Press the ALT & CLR buttons. [. . . ] If the repair is not covered by the warranty, you will be notified of the charges incurred. If the instrument is to be returned to Hanna Instruments, first obtain a Returned Goods Authorization number from the Customer Service department and then send it with shipping costs prepaid. When shipping any instrument, make sure it is properly packaged for complete protection. ACCESSORIES HI 710005 HI 710006 HI 731318 HI 731321 HI 93703-0 HI 93703-05 HI 93703-10 HI 93703-50 HI 92000 HI 920011 12 Vdc / 115 Vac power adapter, US plug 12 Vdc / 230 Vac power adapter, European plug Tissue for wiping the cuvets (4 pcs) Glass cuvet (4 pcs) 0 FTU* AMCO-AEPA-1 calibration solution (30 mL) 500 FTU* AMCO-AEPA-1 calibration solution (30 mL) 10 FTU* AMCO-AEPA-1 calibration solution (30 mL) Cuvet cleaning solution (230 mL) Windows® compatible software PC connection serial cable (5 to 9-pin) Hanna Instruments reserves the right to modify the design, construction and appearance of its products without advance notice. * 1 FTU = 1 NTU Recommendations for Users Before using this product, make sure that it is entirely suitable for the environment in which it is used. Operation of this instrument in residential area could cause unacceptable interferences to radio and TV equipments, requiring the operator to take all necessary steps to correct interferences. [. . . ]