Users Manual & Installation Guide

PV- 5127: Power supply module with UPS

System temperature

The PV-5127 has a temperature measuring circuit that can control an external fan and heater, and prevent the CPU from starting if the temperature is too low or too high. It monitors the system temperature as long as +5V STB is on.

As system temperature sensor, you can use the onboard sensor, or an external sensor of type Infineon KTY 11-5 connected to J2 (labelled “Ext. sensor”). If you don’t want any temperature control, you can also configure it to a simulated 10°C, which effectively disables the temperature control.

The circuitry checks for four different temperature ranges: too cold, cool, warm, and too hot.

Range

Thresholds

Too cold

Below (0°C, 3°C)

Cool

Between (0°C, 3°C) and (15°C, 18°C)

Warm

Between (15°C, 18°C) and (47°C, 55°C)

Too hot

Above (47°C, 55°C)

There is hysteresis when moving between the ranges. The notion (0°C, 3°C) denotes the lower and upper hysteresis levels, so that the change from too cold to cool happens when the temperature rises above 3°C, but to change from cool to too cold, the temperature must fall below 0°C. Similarly for the threshold between cool and warm (at 15°C and 18°C), and between warm and too hot (at 47°C and 55°C).

For testing purposes, the too cold and too hot ranges can be simulated. To simulate too cold, mount a jumper on J2 instead of a sensor. To simulate too hot, leave both J2 and ST3 unconnected.

The temperature ranges are used for these functions:

 

CPU start

 

 

 

Cold

Hot

Range

allowed

Heater

Fan

Critical alarm

LED

LED

Too cold

No

On

Off

No

Flashing

Off

Cool

Yes

Off

Off

No

Off

Off

Warm

Yes

Off

On

No

Off

Off

Too hot

No

Off

On

Yes

Off

Flashing

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Micro Technic PV-5127A user manual System temperature, Too cold, Cool, Warm, Too hot

PV-5127A, PV-5127 specifications

The Micro Technic PV-5127 and PV-5127A models represent a significant achievement in the field of precision measurement instruments, specifically designed to enhance efficiency and accuracy in various industrial and scientific applications. These devices are characterized by their robust construction, user-friendly interface, and advanced technological features that cater to the needs of professionals.

One of the standout features of both the PV-5127 and PV-5127A is their high-resolution digital display, which provides clear readouts of measurements, ensuring that users can easily interpret data in real time. The devices boast a wide measurement range, allowing them to perform accurate readings across various parameters, including voltage, current, and resistance. This versatility makes them ideal for use in labs, research facilities, and fieldwork.

The PV-5127 and PV-5127A incorporate advanced microprocessor technology, ensuring precise measurements and quick response times. This technology enhances the instrument's ability to perform complex calculations, making it suitable for various applications, including electronics testing, industrial maintenance, and educational purposes.

Both models feature intuitive controls, enabling users to navigate functions effortlessly. The user interface is designed for simplicity, minimizing the learning curve for new users while empowering seasoned professionals to utilize the instruments to their full potential. Additionally, the PV-5127A includes enhanced features such as data logging and connectivity options, allowing users to transfer data to computers or other devices for further analysis.

Durability is another notable characteristic of these models. Constructed to withstand harsh working conditions, the PV-5127 and PV-5127A are built with high-quality materials that protect against impacts and environmental factors, ensuring longevity and reliability.

Power efficiency is also a critical aspect, as both models offer low power consumption without compromising performance. This feature is particularly important for users who rely on portable devices for extended periods.

In summary, the Micro Technic PV-5127 and PV-5127A models are sophisticated measurement instruments that combine advanced technology with user-friendly design. Their versatility, durability, and efficiency make them valuable tools for professionals across various fields, enhancing productivity and accuracy in measurement tasks. Whether in a laboratory setting or an industrial environment, these devices stand out as reliable companions for precise measurements.