User manual HANNA INSTRUMENTS HI 95707

[. . . ] Instruction Manual HI 95707C Nitrite Low Range ISM MAN95707CR3 06/06 w w w . h a n n a i n s t . c o m www. hannainst. com This Instrument is in Compliance with the CE Directives 20 1 Dear Customer, Thank you for choosing a Hanna product. This manual will provide you with the necessary information for the correct use of the instrument. Please read it carefully before using the meter. If you need additional technical information, do not hesitate to e-mail us at tech@hannainst. com. [. . . ] · Place the CAL CHECKTM Standard HI 95707-11 Cuvet B into the holder and ensure that the notch on the cap is positioned securely into the groove. 16 SPECIFICATIONS Range Resolution Precision Typical EMC Deviation Light Source Light Detector Method Environment Battery Type Auto-Shut off Dimensions Weight REQUIRED REAGENTS Code HI 93707-0 SPECIFICATIONS 0. 000 to 0. 600 mg/L (as NO2­-N) 0. 001 mg/L ±0. 001 mg/L @ 0. 100 mg/L ±0. 001 mg/L Tungsten lamp with narrow band interference filter @ 525 nm Silicon Photocell Adaptation of an EPA approved method. The reaction between Nitrite and the reagent causes a pink tint in the sample. 0 to 50°C (32 to 122°F); max 95% RH non-condensing 1 x 9 volt After 10' of non-use in measurement mode; after 1 hour of non-use in calibration mode. 180 x 83 x 46 mm (7. 1 x 3. 3 x 1. 8") 290 g (10 oz. ) Description Nitrite Low Range Reagent Quantity/test 1 packet or PRECISION AND ACCURACY Precision is how closely repeated measurements agree with each other. Precision is usually expressed as standard deviation (SD). Accuracy is defined as the nearness of a test result to the true value. Although good precision suggests good accuracy, precise results can be inaccurate. In a laboratory using a standard solution of 0. 100 mg/L Nitrogen-Nitrite and a representative lot of reagent, an operator obtained with a single instrument a standard deviation of 0. 001 mg/L. 5 PRINCIPLE OF OPERATION Absorption of Light is a typical phenomenon of interaction between electromagnetic radiation and matter. When a light beam crosses a substance, some of the radiation may be absorbed by atoms, molecules or crystal lattices. HI 95 series block diagram (optical layout) 6 15 · Hold READ/TIMER for three seconds. The display will show the countdown prior to measurement. Alternatively, wait for 15 minutes and just press READ/TIMER. In both cases "SIP" will blink during measurement. · The instrument directly displays concentration in mg/L of nitrogen-nitrite (NO2­-N) on the Liquid Crystal Display. · To convert the NO2­-N concentration to the nitrite ion concentration (NO2­), multiply the reading by factor of 3. 29. · To convert the NO2­-N concentration to sodium nitrite concentration (NaNO2), multiply the reading by factor of 4. 93. or A microprocessor controlled special tungsten lamp emits radiation which is first optically conditioned and beamed to the sample contained in the cuvet. The optical path is fixed by the diameter of the cuvet. Then the light is spectrally filtered to a narrow spectral bandwidth, to obtain a light beam of intensity Io or I. The photoelectric cell collects the radiation I that is not absorbed by the sample and converts it into an electric current, producing a potential in the mV range. The microprocessor uses this potential to convert the incoming value into the desired measuring unit and to display it on the LCD. [. . . ] Repeat the calibration procedure with the right standard solution, and verify it is not expired. If the calibration procedure fails again, contact your dealer or the nearest Hanna Customer Service Center. ERROR MESSAGES a) on zero reading This indicates that the zeroing procedure failed due to a low signal-tonoise ratio. "No Light": the instrument cannot adjust the light level. [. . . ]