PR electronics PPS vs Video tachometer

The PR electronics Portable Plant Supervisor - PPS - app enables smart control, monitoring and maintenance of PR electronics' signal conditioning devices with mounted communication enabler, i.e. devices in the PR-4000 and PR-9000 series. The app shows live data – directly from the signal conditioning device – anywhere at any time. It is designed for technical and maintenance staff as well as plant operators working in process and factory automation industry. All you need, to set-up a user friendly remote interface for monitoring and programming of your devices, is to download the app and connect to the communication enabler attached onto the signal conditioning device using Bluetooth. Requirements: • Data can be monitored and devices can be programmed remotely using the PPS app in connection with a 4512 communication enabler mounted on a device in the PR-4000 series or the PR-9000 series. Supported devices: • Devices in the PR-4000 series with mounted communication enabler. • Devices in the PR-9000 series with mounted communication enabler. Features: • Remote device monitoring, simulation and programming. • Detailed view of all parameters, monitoring, programming, simulation, discovery, features for PR devices, additional graph functionality for selected functions, connection quality • Intuitive user interface • Start, stop and share logging of data. • Save and share your configuration for documentation or future use. • Load an already saved configuration onto a similar PR-4000 or PR-9000 series device. Licenses: To see the licenses of the public libraries used in the PPS app, see: https://www.prelectronics.com/applicenses/ Privacy: The app does not collect or share data. To see the privacy policy of PR electronics, see: https://www.prelectronics.com/privacy/ PR electronics designs and manufactures signal conditioning devices for process and automation industry. More info and support at http://prelectronics.com/communication.

When the frame rate of a video matches the speed of a particular part, the effect is the same as using a strobe light. In the video, that part freezes. Since the frame rate of a video can be adjusted, this effect can be used to determine the rotational speed of a part. The smartphone must support slow-motion video recording (filming at a high frame rate). This is the case for all smartphones starting with iPhone 5S. The range is as follows: • 0.5—240 Hz (30—14400 RPM), for all phones from iPhone 6 onward • 0.5—120 Hz (30—7200 RPM), for iPhone 5S THE HERTZ (Hz) VALUE IS MORE ACCURATE THAN THE REVOLUTIONS PER MINUTE (RPM) VALUE, SINCE REVOLUTIONS PER MINUTE ARE CALCULATED FROM HERTZ AND ROUNDING IS DONE. To get a clear image, good lighting is important. The clarity of the image is controlled by the exposure of the video (exposure time and light sensitivity (ISO)). If the exposure time is reduced, the image will increase in clarity, but brightness will lower. To increase the brightness, you need to raise the camera's light sensitivity (ISO), but then the amount of noise increases. You also need to manually adjust the focus of the camera. The app can record video. The video format depends on the selected format in the app settings. If your iPhone supports 4K video format (3840x2160), then you can record 4K video at the frame rate supported by your iPhone. Text with important information is added to the frames of the recorded video: the selected frame rate, exposure duration, ISO, time stamp, time difference between the current and previous frames (Tcurr. − Tprev.), the sequence number of the frame in the recorded video. If you want any other information to be added, then let me know. You can choose to add only part of this information, and you can choose a different text color. You also have the option of not adding any information. You can change the information that is added and the color of the text while recording a video. At high frame rates, frames that do not have time to be processed may be discarded. This does not affect subsequent frames and can be controlled using the time difference between the current frame and the previous frame (Tcurr. − Tprev.). Dropping frames affects the video frame rate displayed in the "Photos" app. But the time interval between frames that were taken one after another and were not discarded will correspond to the selected frame rate. Frames may be dropped even when shooting slow motion video using the "Camera" app. You can check this by looking at the frame rate for slow motion video in the "Photos" app. Video containing the app's interface can be captured using the iOS "Screen Recording" function. The app can take a photo with the measurement result, date, and time written on the photo. The exposure time and ISO settings will be saved in the photo's metadata. To take a photo that shows the app interface, tap the "Pause" button and take a screenshot. It is possible to choose a video format that has the best quality, but has a significantly lower maximum frame rate. The difference between the formats is clearly visible only when using the digital zoom. Also, when using a format with better quality, the Rolling Shutter effect is stronger. Therefore, the best quality format can be used at speeds less than about 2000 rpm. You can turn on hints for easier observation of changes in rotation speed. Hints show how to change the frame rate (decrease or increase) depending on the direction of rotation of the mark. The hints are selected manually, but then you do not need to remember this information. The hints are relevant for frequencies close to the rotation frequency. If the direction of rotation of the impeller is known, hints can be selected in advance. The arrow showing the direction of rotation of the impeller must correspond to the "+" button. The video tachometer measures the rotational speed in exactly the same way a stroboscopic tachometer would.