Sci vs Joninn

一、Basic Description 1、This software is mainly used in the digital experiment of primary and middle schools, including physical, chemical and biological experiments. 2、To work properly, the software needs to be used with sensors and bluetooth transmitter modules (sensors are connected to bluetooth launch modules). The sensor data is sent to the receiving end of the iPad or iPhone via a connected bluetooth module. 3、The software operates on portable mobile devices such as iphone or ipad, which has bluetooth low power consumption of BLE 4.0. The software can actively detect and connect bluetooth devices, real-time data collection, analytical sensor data, digital、graphic display digital and graphic display, with functions such as plug and play, automatic recognition ( sensor ), parallel acquisition, combination drawing, free coordinate, line analysis ( fitting, integral, etc. ), table record, add variables, formula, table data drawing, etc. 4、The overall design of this software adopts the Qt5.12.0 technical framework and Objective-C mixing method. 二、Use Instructions 1、Access the Bluetooth transmitter module to the sensor , turn on the power on the Bluetooth transmitter module, and then the indicator light is on. 2、Start the software on the ipad or iphone. 3、The software initial startup interface is QR code scanning interface. The ID information of the device can be automatically scanned and displayed by a QR code that is pasted on the target bluetooth module in the various bluetooth devices that are enabled, which can support scanning of 4 bluetooth modules ( that is, up to 4 sensors at the same time ),after the scan is completed, click start experimental button start scanning, discovering, connecting bluetooth equipment, sensor data transmission, data display and analysis. For easy control, it is recommended that the software be installed on the device with a screen of 4.7 inches and above. Please ensure that the operating system version is iOS 11.0 or above.

This App is used to measure contact angle from photos taken directly above a test droplet. WORKING PRINCIPLE This App uses a modified Bikerman method, to calculate the contact angle (CA) from the smartphone photo. The Bikerman method is only suitable for hydrophilic and neutral surfaces. - For CA less than 75° it works great. - For CA between 75° and 85° it has limited accuracy. - For CA above 85° it is unsuitable. PHOTO TO BE ANALYZED The Photo to be analyzed must be taken from directly above the droplet, and the photo must include a ruler with millimeter markings. When taking the photo, you will get the highest accuracy of the calculated contact angle by ensuring that: ►The droplet should be at least 10% of the photo width. ►The contour of the droplet is in focus and has high contrast to the background. ►Adjust the light to avoid shadows and very bright spots in the photo. ►A single color background (such as a piece of paper) works best. Especially if the surface to be analyzed is transparent. ►If possible use a high contrast test liquid (such as our TL1). ►The ruler should be oriented horizontally or vertically in the photo. Get as close as possible to 0° or 90° orientation as possible. CRITICAL REVIEW OF RESULTS Due to the varying quality of the photos recorded, the measured contact angles shouldn’t be trusted blindly. ►You will get an indication of the accuracy of the measurement from the mean, minimum and maximum estimates of the CA on the results page. If these estimates differ significantly, then the accuracy will be poor. ►You will also get an indication of the accuracy of the measurement from the circles overlaid the photo. If these differ significantly from the actual droplet, then the accuracy will be poor. If you often get poor results, then you must adjust the light conditions to give a higher quality photo. ►If either of the two circles are clearly off the droplet, you should only use the other result. -The purple circle corresponds to MaxCA. -The green circle corresponds to MinCA. ABOUT This App is made freely available by Joninn ApS, a company specialized in development, production and use of hydrophilic coatings. We have ready-to-ship hydrophilic coating products, and assist our customers on a consultancy basis to get their liquid handling device operational. For detailed and updated information on this App please visit our web-site www.joninn.com