Hanna Instruments HI 95701C Instruction Manual

Contents

Hanna Instruments HI 95701C Instruction Manual Manual pdf 4 page image

4The HI 95701 is an auto diagnostic portable microprocessor meter that benefits from Hanna’s years ofexperience as a manufacturer of analytical instruments. It has the advanced optical system based ona special tungsten lamp and a narrow band interference filter that allows most accurate and repeatablereadings. All instruments are factory calibrated and the electronic and optical design minimizes theneed of frequent calibration.With the powerful CAL CHECK™ validation function you are able to validate good performance ofyour instrument at any time. The validation procedure is extremely user friendly. Just use the exclusiveHanna ready-made, NIST traceable standards to verify the performance of the instrument andrecalibrate if necessary.All instruments are splash waterproof and the lamp and filter units are protected from dust or dirt bya transparent cup. This makes the instruments fulfill field applications. Display codes aid the user inroutine operation. The meter has an auto-shut off feature that will turn off the instrument after 10minutes of non use or after 1 hour if left in the calibration mode.The meter uses an exclusive positive-locking system to ensure that the cuvet is in the same positionevery time it is placed into the measurement cell. It is designed to fit a cuvet with a larger neckmaking it easier to add both sample and reagents. The cuvet is made from special optical glass toobtain best results.The HI 95701 meter measures the free chlorine (Cl2 ) content in water samples in the 0.00 to 5.00mg/L (ppm) range. The method is an adaption of the Standard Method 4500-Cl G for drinking water.The reagent is in powder form and is supplied in packets. The amount of reagent is precisely dosed toensure the maximum repeatability.degree Celsiusdegree Fahrenheitmilligrams per liter. mg/L is equivalent to ppm (part per million)milliliter°C:°F:mg/L:mL:GENERAL DESCRIPTIONABBREVIATIONS17or• Press READ/TIMER and “SIP” will blink duringmeasurement.• The instrument will show for three seconds theCAL CHECK™ standard value.Then the date of last calibration (e.g.: “01.08”)appears on the display, or “01.01” if the factorycalibration was selected. In both cases the numberof the month is blinking, ready for date input.Note: if the display shows “ERR” the calibrationprocedure failed. Verify that both CAL CHECK™Standards HI 95701-11 Cuvets, A and B, arefree from fingerprints or dirt and that they areinserted correctly.DATE INPUT• Keep READ/TIMER pressed to scroll to the desiredmonth number (01-12).• When the correct month has been set, press ZEROto confirm. Now the display will show the daynumber blinking. Keep READ/TIMER pressed toscroll to the desired day number (01-31).Note: it is possible to change from day to monthand vice versa by pressing ZERO.• When both the day and month have been selected,hold CAL CHECK for three seconds to store dateand calibration values. The instrument will showfor one second “Stor”, to confirm that the newcalibration data has been accepted.• The instrument will return automatically to themeasurement mode by displaying "701" on theLCD.