User manual HANNA INSTRUMENTS HI 93703-11

[. . . ] 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). [. . . ] 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). 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 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. 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. 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. CALIBRATION PROCEDURE · Turn the meter on and wait for the display to show "----". HI 93703-11 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 9370311 turbidity meter, complies with the ISO 7027 International Standard and can effectively minimize any errors due to colored dissolved substances. This effect, called "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 may give false results and should be avoided. · Dirty glassware could also affect readings along with scratched or dented vials. 15 * 1 FTU = 1 NTU · Press the ALT & CAL buttons together. The meter then enters the calibration mode, displaying "0. 00 cl" and prompting the user to insert the 0. 00 FTU standard. CLR ON OFF VIEW STO DATE READ CAL GLP LOGGING MICROPROCESSOR TURBIDITY METER ALT 0. 00 cl · Place the 0. 00 FTU standard in the cuvet holder · Press CAL, SIP and CL will start blinking sip cl 16 · If "ERR1" appearson the LCD, please check the standard solution. err1 · After approximately 30 seconds the meter will display 10. 00, prompting the user to place the 10. 00 FTU standard solution in the cuvet holder. · After approximately 30 seconds the LCD will display "----". NOTE: If "ERR1" is displayed, the calibration data is maintained. VIEWING CALIBRATION DATE To display the last calibration time and date, press the GLP button to toggle through the date and time. If the display shows "FS", the instrument has factory calibration settings loaded and no date will be displayed. HI 93703-11 CLR ON OFF 10. 00 cl · Place the 10. 00 FTU standard in the holder press CAL, SIP and CL will start blinking VIEW STO DATE READ CAL GLP sip cl · After approximately 30 seconds the meter will display 500, asking the user to place the 500 FTU buffer solution in the cuvet 500 holder. LOGGING MICROPROCESSOR TURBIDITY METER ALT FS cl VIEWING FIRMWARE VERSION To display the firmware version press and hold the ON/OFF key for HI 93703-11 approx. ten seconds (when turning the meter on). CLR ON OFF NOTE: At this point the user can save the two point calibration setup by pressing ALT & CAL buttons, leaving the calibration mode. VIEW STO CAL DATE GLP READ To perform a three point calibration, place the 500 FTU standard solution in the cuvet holder. LOGGING MICROPROCESSOR TURBIDITY METER ALT The firmware version will be displayed V1. 0 · Press CAL, SIP and CL will start blinking sip cl ENSURE ACCURATE CALIBRATION The procedure below should be carefully followed during testing and calibration: 18 17 · All glassware that comes into contact with standards should be maintained clean. Wash with the HI 93703-50 cleaning solution and rinse with HI 93703-0 or turbidity free water. This removes the effect of any previous liquid and any dust or foreign objects that may be present inside. [. . . ] If the repair is not covered by the warranty, you will be notified of the charges. When shipping any instrument, make sure it is properly packaged for complete protection. To validate your warranty, fill out and return the enclosed warranty card within 14 days from the date of purchase. Reproduction in whole or in part is prohibited without the written consent of the copyright owner. [. . . ]