OneTouch Series II

Users Manual

Reversed Pair

A cable pair is reversed when two individual wires of a pair are reversed from end-to-end, as shown in Figure 4-3.

A reversed pair is not necessarily a catastrophic failure. Some 10BASE-T adapter cards and Hubs can sense the reversed polarity and continue to operate. It is always a good idea, however, to fix this problem when found.

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Figure 4-3. Reversed Pair

Crossed Pair

A pair is crossed when a wire pair is mapped to a different set of connector pins on the other end of the cable. Figure 4-4 shows an example of a crossed pair.

Sometimes pairs are crossed intentionally. A cable with a 1-2 to 3-6 cross is commonly known as a crossover cable, which is used for cascading Hubs together that do not have uplink ports.

Special crossed-pair patch cords are useful when working with non-standard cabling systems.

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Figure 4-4. Crossed Pair

Split Pair

A split pair is different from a crossed pair in that the pin- to-pin wiring is correct but the wire pairing is incorrect. That is, a “connector” pair is made up of two wires from a “cable” pair. Figure 4-5 shows an example of a split pair.

A split pair is much more susceptible to noise because the two wires in the “pair” are not twisted around each other. Split pairs can be especially difficult to find because the symptoms depend upon the particular wires involved, the cable length, and ambient noise.

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Fluke Series II user manual Reversed Pair, Crossed Pair, Split Pair
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Series II specifications

The Fluke Series II is a cutting-edge line of industrial multimeters that incorporates advanced technology and features tailored for professionals working in critical environments. Renowned for their precision and reliability, these multimeters are quintessential tools for technicians and engineers alike, whether in manufacturing, electrical engineering, or maintenance applications.

One of the hallmark characteristics of the Fluke Series II is its robust design. Constructed to endure harsh working conditions, these meters come equipped with a high-impact casing that protects against drops and vibrations. Their IP67 rating ensures they are dust-tight and can withstand temporary immersion in water, making them ideal for fieldwork in tough environments.

The Series II boasts a range of measurement capabilities. With the ability to measure voltage, current, and resistance, as well as additional readings such as frequency, capacitance, and temperature, these multimeters deliver unparalleled versatility. Many models in the Series II also feature True RMS (Root Mean Square) measurement capabilities, enabling accurate readings of non-linear and distorted waveforms, which are increasingly common in modern electronics.

Another significant feature is the advanced display technology. The Series II multimeters often come with large, high-contrast LCDs that facilitate easy reading in various lighting conditions. Some models even offer graphical displays, enabling users to visualize trends in measurement data over time.

User-friendliness is also a hallmark of the Fluke Series II. With intuitive interfaces and simplified navigation, users can access advanced features quickly. Auto-ranging capabilities allow the meter to automatically select the appropriate range for the measurement, minimizing user errors and streamlining the testing process.

Fluke's commitment to safety is underscored by the design of the Series II, which includes features such as safety-rated test leads, protective rubber booting, and a high-voltage warning indicator for added peace of mind.

Moreover, the connectivity options within the Series II enable seamless data transfer to PCs and mobile devices, facilitating easier logging and analysis of measurement data. Many models support Bluetooth or USB connectivity, making it easier than ever to integrate multimeter readings into existing data collection and analysis workflows.

In conclusion, the Fluke Series II multimeters stand out for their durability, versatility, and user-centric features. Their combination of advanced measurement technology, rugged design, and safety functions makes them essential instruments for professionals who demand accuracy and reliability in their work. The commitment to innovation and excellence that Fluke exemplifies ensures that the Series II remains a trusted choice in the field of industrial measurement tools.
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