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Thanks to paperless chart recording technology; students and teachers are now able to clearly and conveniently visualize their experimental data. Paperless chart recording is a much more user-friendly solution with an interactive dialogue simplifying both setup and operation procedures. This versatile datalogger proved to be a cost effective solution for handling analog, digital and other types of variables with high resolution and speed and also offered expansion modules. CAS DataLoggers together with high-quality manufacturer Brainchild has the solution with the VR-18 Paperless Chart Recorder, a high resolution (true VGA, 640x480 pixels) 18-channel data logger featuring an infrared detector, plug & play I/O card, high flexibility, and user-friendly operation, all in a compact size. The VR-18 Paperless Chart Recorder can be connected to a PC with an Ethernet cable allowing students to use the Brainchild's FREE software, allowing for streaming live data or downloading the data to an Excel spreadsheet to further manipulate the information for reports and assignments. We installed a new Micro SD card with the latest Raspberry Pi OS, and after updating the software, the serial port and i2c bus were enabled. PCs are normally not equipped with an RJ11 socket for serial RS232 communications.

In multifunction instruments, not only the cables connected to the measurement, but also the RS485 serial port and the analog and digital inputs and outputs must be wired. It also offered 2 relay outputs and 8 digital ports individually configurable as inputs or outputs. This high performance and high connectivity equipment also offered personnel easy configuration and operation to get the project underway as quickly as possible. The only possible reference is the reading of the displayed value, for example, of the current. Capable of performing mathematical operations in the input channels, this high-speed reading and logging device utilized a 24-bit A/D converter enabling up to 1000 samples a second and a suite of connectivity options including a 10/100 Mbps Ethernet interface that allowed for access through a browser (HTTP), FTP (client and server), e-mail sending (SMTP), SNMP and Modbus TCP. Choosing an analog instrument ensures good reading stability, due to the mechanical inertia of the needle and the fact that the reader immediately knows whether the instrument is operating normally or if the reading is out of range. The main problems that arise during the testing phase can be due to incorrect installation of instruments and accessories.

Before digital instruments begin to operate, they must be set with measurement system parameters and communication parameters. Question:What should I do if I can't receive data and the communication is abnormal? Configuration and data accessibility were a snap: the FieldLogger's user-friendly configurator software was accessible by Ethernet, USB or RS485, and also provided means for online monitoring, downloading of all logged data, rs485 cable and quick exporting to spreadsheets and other formats. The FieldLogger's small 164 x 117 x 70mm dimensions fit easily into the storage bin with plenty of room for the bin's normal load. RS-485 is used in basically connecting the temp sensor or thermostat in the room to the master controller. Connecting analog instruments is very simple; you just need to connect the phase and neutral cables to the instrument. In three-phase systems with distributed neutral three current transformers are required. In a three-phase system, instruments can be installed that measure the single electrical parameter, one per phase, or a voltmeter and a current can be installed with the voltage and current switches, allowing the measurements to be displayed in sequence.

Flexible and rigid cables or bars for power transport can be installed in a power panel. Transformers can be of different types, depending on the assembly system: a through cable or a cable with a coiled primary, transformers for assembly on horizontal or vertical bars. The cable shield must be earthed only in one point. This would enable the same standards to be used worldwide and also give manufacturers access to a global market using just one product. We tried several RS485 Pi hats, but all had the same issue. To configure a RS485 Extension you first have to choose the baud rate, parity and stop bits. If your bus isn't absolutely huge you should probably choose "speed: 2000000 (2Mbit/s), parity: None, Stop bits: 1". If you start to get timeouts and the CRC error counter is rising rapidly, you might want to lower the baud rate. If the bus is only a few meters long then the cable you use should not matter. Following being scammed by the Zero Home Bills solar panel supplier, we placed an order with another supplier whose website showed that they had the panels we required in stock, but after a few days, they contacted me to say they did not have them, and the website hadn't been updated for a long time.