Hanna HI-96731 Zinc Portable Photometer
The HI96731 portable photometer is for the measurement of zinc. Hanna’s portable photometers feature an advanced optical system; the combination of a special tungsten lamp, a narrow band interference filter, and silicon photodetector ensure accurate photometric readings every time. The Hanna exclusive CAL Check™ feature utilizes ready-made, NIST traceable standards to verify both meter validation and calibration. The exclusive cuvette locking system ensures that the cuvette is inserted into the measurement cell in the same position every time to maintain a consistent path length.
CAL Check™ – Allows for performance verification and calibration of the meter using a CAL Check NIST traceable secondary standard.
GLP – Records the date of the last user calibration performed.
Built in timer – Allows the use of a timer to ensure the appropriate 3 minutes and 30 seconds reaction time is used for the chemical reaction. At the end of the timer countdown the meter will automatically take the reading. This feature ensures consistency across multiple users.
Indexing indent on meter – The meter has an indent that allows for a lock and key fit with the cuvette cap. This ensures that the cuvette is indexed consistently (same position) in order to maintain the same path length for accurate results.
Cooling Lamp Indicator – It is necessary to maintain a consistent temperature of the optical components in order to maintain a narrow wavelength band of light. This photometer has a cooling lamp indicator that is displayed for a short period of time before each measurement in order to allow the components to cool and obtain the highest accuracy possible.
Error messages – Messages on display alerting to problems including no cap, over range and under range readings, and light source error.
Auto-shut off – Automatic shut off after 10 minutes of non-use when the meter is in measurement mode. Prevents wastage of batteries in the event the meter is accidentally not turned off.
Battery status indicator
The instrument has a battery level indicator to display reaming life as follows:
• 3 lines for 100 % capacity
• 2 lines for 66 % capacity
• 1 line for 33 % capacity
• Battery icon blinks when the capacity is less than 10 %.
Units of measure – Appropriate unit of measure is displayed along with reading.
Zinc is normally introduced into drinking water through industrial effluents, especially due to dezincification of brass and deterioration of galvanized iron. In addition to drinking water, zinc is measured in surface finishing, boilers and cooling towers, water conditioning, and effluent waters.
The HI96731 uses an adaptation of the Standard Methods for the Examination of Water and Wastewater, 20th edition, zincon method to measure zinc concentrations of less than 3.00 mg/L (ppm). When the reagent is added to a sample containing zinc, the sample will turn a brown-green to a blue hue; the greater the concentration, the deeper the color. The associated color change is then colorimetrically analyzed according to the Beer-Lambert Law. This principle states that light is absorbed by a complementary color, and the emitted radiation is dependent upon concentration. For silver determination, a narrow band interference filter at 575 nm (yellow-green) allows only yellow-green light to be detected by the silicon photodetector and omits all other visible light emitted from the tungsten lamp. As the change in color of the reacted sample increases, absorbance of the specific wavelength of light also increases, while transmittance decreases.
CAL Check™ standards with certificate
The HI96731-11 CAL Check™ standards are used for calibration and performance verification of photometers with the CAL Check™ function.
Supplied with Certificate of Analysis
- Lot number
- Expiration date
- Standard value @ 25 °C
- Reference meter NIST traceable
Provided storage containers
- Light tight
- Protects from accidental breakage
Specifications Hanna HI-96731 Zinc Portable Photometer
|Product Name||Zinc Portable Photometer – HI96731|
|Zinc Range||0.00 to 3.00 mg/L (ppm)|
|Zinc Resolution||0.01 mg/L|
|Zinc Accuracy||±0.03 mg/L ±3% of reading|
|Zinc Method||adaptation of the Standard Methods for the Examination of Water and Wastewater, 20th edition, zincon method|
|Photometer/Colorimeter Light Source||tungsten lamp|
|Photometer/Colorimeter Light Detector||silicon photocell with narrow band interference filter @ 575 nm|
|Battery Type/Life||9V battery|
|Automatic Shut-Off||after ten minutes of non-use in measurement mode; after one hour of non-use in calibration mode; with last reading reminder|
|Environment||0 to 50°C (32 to 122°F); RH max 95% non-condensing|
|Dimensions||193 x 104 x 69 mm (7.6 x 4.1 x 2.7”)|
|Ordering Information||HI96731 is supplied with sample cuvettes (2) with caps, 9V battery, instrument quality certificate and instruction manual. CAL Check™ standards and testing reagents sold separately.|
Hanna HI-96731 Zinc Portable Photometer Manual
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