Hanna HI723 High Range Chromium VI Colorimeter Checker® HC

Description

Introducing the HI723 Chromium VI Checker

The Hanna HI723 Chromium VI High Range Checker® HC is a powerful and precise tool designed to significantly improve water quality testing. This handheld colorimeter offers a superior and more accurate alternative to traditional chemical test kits. By providing a direct digital reading of chromium VI levels, it completely eliminates the guesswork and visual interpretation required when trying to match colors on a chart. The device is engineered for simplicity and ease of use, featuring a single-button operation system. This makes obtaining accurate results both quick and straightforward, catering to both experts and those new to water quality analysis.

The HI723 is classified as a dedicated, single-parameter instrument, ensuring its accuracy and focus. Its portable, pocket-sized design provides great convenience, allowing for on-the-go measurements in various environments. The built-in timer is a key feature that guarantees consistent and repeatable results with every test. Moreover, the large LCD is easy to read, and an automatic shut-off feature helps conserve battery life by powering down the device after 10 minutes of non-use and 2 minutes after a reading is taken. These combined features make the HI723 an indispensable device for anyone requiring reliable and efficient chromium VI measurements.

The Versatile Applications of this Colorimeter

Chromium VI, also known as hexavalent chromium, is a compound with significant industrial applications but also poses considerable environmental and health risks. Due to its excellent corrosion-resistant properties, it is extensively used in the plating industry. It also plays a vital role in cooling towers, where it helps prevent corrosion within the system. However, its toxic and carcinogenic nature makes its presence in the environment, especially in wastewater, a serious concern.

The HI723 is specifically designed for crucial applications such as water quality control checks, ensuring that chromium VI levels are within safe limits. Before wastewater can be discharged, it must be adequately treated to reduce chromium VI levels to acceptable standards. The accuracy and ease of use of the HI723 make it the perfect tool for industrial and environmental professionals to monitor these levels effectively. Its precision helps companies comply with environmental regulations and ensures that their processes are safe and sustainable. The portability of the device also makes it ideal for field use, providing instant, reliable data on-site without needing to transport samples to a lab.

A Closer Look at Its Core Technology

The HI723 Checker® HC operates on the principle of colorimetry. It uses an adaptation of the ASTM Manual of Water and Environmental Technology, D 1687-92, specifically the Diphenylcarbohydrazide Method. In this method, a purple tint is created in the sample when chromium VI reacts with the reagent. The device then quantifies the intensity of this color change to determine the chromium VI concentration.

This colorimetric method, coupled with a high-quality Light Emitting Diode (LED) as the light source and a silicon photocell as the detector, allows for highly accurate measurements. The LED operates at a specific wavelength of 525 nm, which is optimized for this particular reaction. The HI723’s resolution is one ppb, enabling it to detect even minute changes in chromium VI concentration. This sophisticated technology, packaged in a user-friendly device, offers a reliable and repeatable method for water testing that surpasses the limitations of older visual test kits.

Ensuring Accuracy in Every Measurement

To guarantee the most accurate measurements, several best practices are recommended. It’s crucial to ensure that the sample is free from any debris. When placing the cuvette into the checker, it must be completely dry on the outside and free of fingerprints, oil, or dirt. It is highly recommended to wipe the cuvette thoroughly with a lint-free or microfiber cleaning cloth before insertion. Shaking the cuvette can generate bubbles, which may cause higher-than-expected readings, so these bubbles should be removed by gently swirling or tapping the cuvette.

Furthermore, it is important not to let the reacted sample stand for too long after adding the reagent, as this can affect the accuracy of the reading. After the reading has been taken, the sample should be discarded immediately to prevent permanent staining of the glass cuvette. Following these simple but critical tips ensures that the HI723 consistently delivers the precise and reliable results it was designed to provide.

Simple, Step-by-Step Measurement Procedure

Operating the HI723 is a straightforward process. First, press the ON/OFF button to turn on the checker. The display will show “Add,” “C.1,” and a blinking “Press”. Next, fill the cuvette with 10 mL of the unreacted sample, replace the cap, and insert it into the checker. Press the ON/OFF button again to zero the device; the display will show “Add,” “C.2,” and a blinking “Press” when it is ready.

After the device is zeroed, remove the cuvette and add the contents of one packet of the HI723-0 Chromium VI High Range reagent. Replace the cap and shake vigorously for approximately 10 seconds. Reinsert the cuvette into the checker and close the cap. To start the measurement, press and hold the ON/OFF button; the display will show a countdown before the reading is taken. Alternatively, you can wait for 6 minutes and then press the button. The checker will then display the chromium VI concentration in ppb. The instrument automatically turns off 2 minutes after the reading to save power.

Understanding Error and Warning Messages

The HI723 is equipped with a system of clear warning messages to alert the user of erroneous conditions or when measured values are outside the expected range. For instance, a “L.H” message indicates “Light High,” meaning there is an excess of ambient light reaching the detector. A “L.Lo” message, or “Light Low,” indicates insufficient light for a measurement. Both of these issues require checking the zero cuvette’s preparation.

If the display shows “Inv,” it means the sample and zero cuvettes have been inverted. The recommended action is to swap the cuvettes and repeat the measurement. A blinking “0” indicates “Under Range,” meaning the sample absorbed less light than the zero reference. Users should verify their procedure and ensure they use the same cuvette for both reference and measurement. A blinking maximum concentration value indicates an “Over Range” reading, meaning the value is outside the method’s limits. To resolve this, ensure the sample is free of debris and, if necessary, dilute it and repeat the measurement.

Power Management and Product Warranty

The HI723 is powered by a single 1.5V AAA Alkaline battery. A fresh battery can last for a minimum of 5,000 measurements, ensuring long-term use before a replacement is needed. The instrument will display “bAd” and then “bAt” when the battery is drained, before turning off completely. Replacing the battery is a simple process: turn off the checker, use a screwdriver to remove the battery cover, replace the old battery with a new one, inserting the negative end first, and then secure the cover.

Hanna Instruments provides a one-year warranty for the HI723 Checker® HC, covering defects in workmanship and materials when the product is used for its intended purpose and maintained according to the instructions. This warranty is limited to repair or replacement at no charge, but it does not cover damage from accidents, misuse, tampering, or a lack of prescribed maintenance. All Hanna Instruments products, including the HI723, conform to CE European Directives and are RoHS compliant.

Guaranteed Quality with TPT24

For those looking to acquire this exceptional device, the online store TPT24 is the premier online retailer for the Hanna HI723 in the world. TPT24 guarantees the authenticity and quality of the product, delivering it to you with a quality and authenticity guarantee no matter your location. Their commitment to customer satisfaction and product integrity ensures you receive a genuine and reliable device.