WARNING: EXTREME CAUTION MUST ALWAYS BE EXERCISED WHEN

TAKING ANY HIGH VOLTAGE MEASUREMENTS. IT SHOULD BE DONE

ONLY BY QUALIFIED PERSONNEL WHO ARE TRAINED IN THE SAFETY ASPECTS OF WORKING WITH HIGH VOLTAGE.

A sample of the output voltage is available in the REMOTE connector. If it is desired to measure the HV output externally, care must be taken to understand the accuracy of the measurement.

When making a DC measurement, such as when the power supply is holding voltage on a capacitor, any HV probe and DVM combination can be used. The Fluke 80K-40 probe with any 10M input resistance DVM is adequate up to 40kV. Building a simple resistor divider using appropriate HV resistors is also very straightforward. Keep in mind that all HV resistors, including the one in the Fluke probe, exhibit a negative voltage coefficient, changing by up to 4% from zero to max. voltage. Derating the resistors and calibrating at the operating point solves this problem.

The value of the resistor R1 and R2 (Figure 5.3) can be calculated as follows:

V M =

R 2

 

 V O where VO is the High Voltage being measured.

R

R

2

 

1

 

 

Making a pulsed measurement with an oscilloscope requires a compensated HV probe having a wide bandwidth. Simply connecting a DC probe, through the proper resistance, into a scope yields a slow response only adequate for low rep. rate systems. As with DC probes, the pulsed probe resistor voltage coefficient is a problem. In addition, damage to the resistors can occur during pulsing due to high electric field gradients. Also, stray

capacitance to nearby objects can significantly alter the pulse response. For a high-performance, shielded probe to 40KV use a Tektronix P6015 or Ross Engineering VD60-8.3-A-K-LB.

Measurements accurate to better than 0.1% can be achieved using a bias technique. For example, if a 40V signal (40kV divided by 1000) is to be measured accurately, the minus input of the DVM would be biased up 40V. The original signal, with respect to ground, is fed to the plus input of the DVM. The bias can be measured accurately for absolute measurements, or relative measurements read directly as the line or load is varied. In the same manner, an oscilloscope return can be biased for accurate peak measurements during pulsing.

83-493-001 Revision G

5 - 3

Applications

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Fluke pmn instruction manual
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pmn specifications

Fluke PMN, or Fluke Precision Measurement Network, is an advanced solution designed to enhance the reliability and accuracy of metrology in various applications. This system is aimed at professionals in industries such as manufacturing, aerospace, telecommunications, and utilities, where precision measurement is critical.

One of the main features of Fluke PMN is its integrated measurement capabilities. The system combines multiple measurement functions, including voltage, current, resistance, frequency, and temperature, enabling users to perform comprehensive assessments without the need for multiple devices. This integration simplifies workflows and reduces the time spent on measurements.

Fluke PMN utilizes cutting-edge measurement technologies to ensure high accuracy and repeatability. One notable technology is its advanced digital signal processing, which minimizes noise and enhances the clarity of measurements. This results in significantly improved measurement precision, especially in complex environments where interference is prevalent.

Another key characteristic of Fluke PMN is its scalability. The system can be expanded with additional modules to adapt to the specific needs of a business. This modularity makes it a versatile choice for organizations looking to grow their measurement capabilities over time without the need for complete system overhauls.

Fluke PMN also supports remote monitoring and management through cloud technology. Users can access real-time data, generate reports, and perform analysis from virtually anywhere, making it easier to manage multiple measurement sites and maintain consistent quality standards across operations.

The user-friendly interface is another significant aspect of Fluke PMN. The intuitive design allows users to easily navigate through its various functions, ensuring that even personnel with minimal training can operate the system efficiently. This aspect greatly reduces the learning curve and improves overall productivity.

In addition to these features, Fluke PMN is built to withstand the rigors of industrial environments. Its durable construction ensures longevity and reliability, minimizing downtime due to equipment failure. This resilience is crucial for industries that depend on continuous operation and stringent adherence to quality control standards.

Overall, Fluke PMN represents a powerful solution for precision measurement. With its integrated capabilities, advanced technologies, scalability, remote monitoring, and robust design, it equips professionals with the tools they need to enhance accuracy, streamline operations, and uphold the highest standards of quality in their respective fields.
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