Section 7

7.8 Replacing the Fuse

DANGER

For continued protection against fire, replace fuses with only fuses of specified type and current rating.

PELIGRO

Para una continua protección contra incendios, reemplace los fusibles únicamente por los del tipo y capacidad recomendados.

Medium Delay Fuse, 5 Amp

The main 12 volt line is fused as soon as it enters the controller housing. This is a 5-amp medium delay fuse (Cat. No. 8753) and is accessible from outside the case on the back side of the controller housing. To remove the fuse unscrew the cap on the fuse holder with a flat blade screwdriver.

PCB Fuse Removal and Inspection

Pull the fuse straight out of the holding clips to remove the fuse. The wire strand inside the glass tube will be broken. Use an ohmmeter to tell for sure if a fuse needs to be replaced.

7.9 Motor/Gear Box

The motor/gear box requires no regular maintenance. The special formulation gears are self lubricating and require no oil or grease.

7.10 Internal Desiccant Module

Note: The desiccant module cannot be recharged by heating. Do not attempt to bake the desiccant module in an oven to remove the moisture as this could be a fire hazard.

The Internal Desiccant Module (Cat. No. 8849) consists of a moisture-absorbent material inside a poly bag. If the humidity indicator on the front panel turns pink, replace the module and the back panel perimeter gasket (Cat. No. 8606). The desiccant module is located under the CPU board.

7.10.1 Replacing the Desiccant

To replace the desiccant, detach the controller from the refrigerator cabinet, and remove the screws from the controller bottom panel. Remove the desiccant bag and replace with a new one. Replace the controller gasket and cover plate. Reattach the controller to the refrigerator. After replacing the desiccant module and re-sealing the case, the Internal Case Humidity Indicator Disc (Cat. No. 2660) should return to its original blue color. If the humidity indicator is blue the desiccant is dry. Replace the indicator disc if it fails to return to blue after replacing the desiccant module. To replace the indicator disc, remove the bottom panel that is held in place by a small clip and screw.

 

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Replacing the Fuse

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Hach 900 MAX manual Section Replacing the Fuse, Motor/Gear Box, Internal Desiccant Module, Replacing the Desiccant
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900 MAX specifications

The Hach 900 MAX is an advanced analytical instrument designed to perform water quality analysis with precision and efficiency. This multiparameter water quality analyzer is tailored for a wide range of applications, including environmental monitoring, wastewater treatment, and industrial processes. Its unique design and technology make it a valuable tool for professionals in the field.

One of the standout features of the Hach 900 MAX is its ability to measure multiple parameters simultaneously. Equipped with advanced sensors, the device can analyze key water quality indicators such as pH, turbidity, dissolved oxygen, conductivity, and various chemical parameters. This comprehensive measurement capability allows users to gain a complete understanding of water quality in a single run, saving both time and resources.

The Hach 900 MAX utilizes cutting-edge technologies to provide accurate and reliable results. Its integrated optical sensors employ advanced photometry, which enhances the detection of chemicals in water samples with high sensitivity. Additionally, the device includes advanced calibration management tools that ensure consistent accuracy over time. Users can easily perform routine calibrations with minimal effort, facilitating reliable data collection.

Another notable characteristic of the Hach 900 MAX is its user-friendly interface. The instrument features a large, touchscreen display that allows for intuitive navigation through various settings and parameters. Users can quickly access real-time data, generate reports, and analyze trends using the built-in software. The ability to customize dashboards and create visual representations of data enhances user experience and simplifies the decision-making process.

In addition to its analytical capabilities, the Hach 900 MAX emphasizes connectivity and data management. The instrument can be connected to laboratory information management systems (LIMS) and other data networks, enabling smooth data transfer and integration into existing workflows. This connectivity enhances collaboration among team members and facilitates compliance with regulatory requirements.

Durability is another hallmark of the Hach 900 MAX. The device is designed for use in demanding environments, with robust construction and protection against dust and moisture. This reliability ensures that the analyzer remains operational even in challenging conditions, making it suitable for field applications.

Overall, the Hach 900 MAX stands out as a powerful and versatile tool in the realm of water quality analysis. With its multiparameter measurement capabilities, advanced sensor technologies, user-friendly interface, and reliable performance, it enables professionals to obtain accurate insights into water quality efficiently. As environmental concerns continue to grow, instruments like the Hach 900 MAX play a crucial role in ensuring the safety and sustainability of water resources.
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