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Fluke 76-907, 76-908 Phantom Preparation, 1Signal Producing Solution, 2Filling the Phantom

Models: 76-908 76-907

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Operation

Phantom Preparation 2

Section 2

Operation

2.1 Phantom Preparation

The phantoms can be shipped filled with solutions or solutions can be shipped separately. Each user can also prepare a solution.

2.1.1Signal Producing Solution

At each operating field strength, AAPM recommends that the chosen NMR material should exhibit the following characteristics:

100 msec < T1 < 1200 msec

400 msec > T2 > 50 msec

proton density = H2O density

One of the following solutions is suggested as a signal producing solution. It should be noted that relaxation times are both temperature and field strength dependent. The relaxation rates (inverse of relaxation times) are approximately linear with ion concentration.

Agent

Concentration

T1

T2

CuS04

1-2SmM

860-40 msec

625-38 msec

NiC12

1-25mM

806-59 msec

763-66 msec

Propanediol

0-100%

2134-217 msec

485-72 msec

MnC12

0.1-1mM

982-132 msec

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2.1.2Filling the Phantom

Degassed water should be used to make MR solution. Water can be degassed by boiling and cooling. The following amount of water should be prepared:

Cubical Phantom: 4,000 cc/4 liters

Flood Phantom: 12,000 cc/12 liters

Once the solution has been prepared, it is recommended that several drops of wetting agent be added to reduce surface tension and that some hydrochloric acid be added as a fungicide. As the solution is poured into the phantom one should watch for air bubbles, especially any trapped in the resolution section. It is recommended that the phantom be placed in a vacuum chamber for several hours to remove the trapped bubbles.

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Fluke 76-907, 76-908 user manual Phantom Preparation, 1Signal Producing Solution, 2Filling the Phantom
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76-908, 76-907 specifications

The Fluke 76-907 and 76-908 are advanced digital multimeters designed to cater to the needs of professionals and technicians in diverse fields. Known for their accuracy, durability, and versatility, these instruments have become essential tools for electrical measurement and troubleshooting.

One of the standout features of both the Fluke 76-907 and 76-908 is their superior measurement capabilities. These multimeters can measure AC and DC voltage, current, resistance, frequency, and temperature with impressive precision. The devices are equipped with a large LCD display that provides clear readings, even in low-light conditions, making it easy for users to take measurements in various environments.

The Fluke 76-907 is particularly recognized for its ergonomic design, ensuring comfort during prolonged use. It includes a built-in flashlight to illuminate dark work areas and an adjustable backlight for improved visibility of the display. Additionally, the device features a rugged casing that protects it from drops and impacts, enhancing its longevity and reliability in demanding job sites.

On the other hand, the Fluke 76-908 offers advanced features such as Bluetooth connectivity, enabling users to connect the meter to compatible smartphones and tablets. This feature allows for seamless data transfer and real-time monitoring of measurements via an intuitive app. The integration of wireless technology facilitates remote measurements, which is crucial in hazardous environments where direct access may be restricted.

Both models utilize advanced technology, including True RMS measurements, which ensure accurate readings of complex signals. This is particularly beneficial for professionals working with variable frequency drives, non-linear loads, and harmonics. The Fluke 76-907 and 76-908 also come equipped with a range of safety features, including CAT III and CAT IV ratings, ensuring they can safely handle high-voltage applications.

Battery life is another essential characteristic of these multimeters. Both models are designed for extended usage with efficient power management systems, minimizing downtime caused by battery replacements.

Furthermore, the Fluke 76-907 and 76-908 are straightforward to operate, featuring a user-friendly interface that allows technicians to navigate functions easily. They are ideal for various applications, from routine maintenance and troubleshooting in electrical systems to complex diagnostics in industrial settings.

In conclusion, the Fluke 76-907 and 76-908 digital multimeters stand out for their precise measurements, robust design, and innovative technology. Whether for fieldwork or onsite diagnostics, these multimeters provide reliability and efficiency, making them indispensable tools for professionals in the electrical industry.