FAQ#073 – Which is the maximum number of digitized sensors (RS-485, Modbus), the maximum number of chains and the maximum length of cable in a RS-485 network?
Last update: October 2021 All the SISGEO digitized sensors utilize a RS485 interface with Modbus protocol. 1.The maximum number of digitized sensors in a RS-485 network are 247 (theoretical) 2.The maximum number of digitized sensors chains that is possible to connect to Modbus master unit (as OMNIAlog or miniOMNIAlog) are 4. 3. About the maximum […]
FAQ#072 – Why pushing RUN in a miniOMNIAlog webpage with 3G/2G modem the local connection with the PC gets lost?
The loss of the local connection with the PC is normal. This happens because the communication “bus” is the same between PC and miniOMNIAlog and between miniOMNIAlog and 3G/2G modem. Therefore, if you start miniOMNIAlog from the web, the communication is directed towards the 3G/2G modem. This allows to the modem to send SMS, e-mail […]
FAQ#071 – Why miniOMNIAlog is supplied through the PC when it is connected through USB?
This feature allows to not consume the internal batteries during the configuration phase or during the data download. In this way, independently from the duration of the activities above described, the internal batteries are used only during the field activities (acquisition, data dispatch etc). This guarantees a superior duration of exercise.
FAQ#070 – If you disconnect the USB cable from miniOMNIAlog, the datalogger resets. Is it normal?
Yes, it is. This takes place because when you connect the PC though USB connection, miniOMNIAlog is powered by the PC. If you disconnect the USB cable, miniOMNIAlog resets to change its supply source and returns to the supply through internal battery or from an external source (solar panel or electrical supply).
FAQ#069 – If miniOMNIAlog is supplied with internal batteries, can it read the digitized sensors SISGEO?
No, in case you have to read the SISGEO digitized sensors, it is necessary to use an additional module of power supply (code 0OMX24V030W). This is necessary to power the instrument with the necessary power supply. This module considers the supply or from solar panel or electrical.
FAQ#068 – Using miniOMNIAlog, is it possible to do acquisitions leaving it connected to the PC?
No, it is not possible. miniOMNIAlog, to do correct measurements, needs to be powered or from the internal battery or from an external power supply (solar panel, electrical supply) to supply to the connected instruments the right tension and current. Leaving connected miniOMNIAlog to the PC through USB cable, the instrument is powered directly to […]
FAQ#067 – Is it possible to avoid the manual configuration of the dial-up remote connection and of the virtual modem necessary to communicate with miniOMNIAlog?
Yes, it is. You have to use the tool “miniOMNIAlog communcation tool” that you could find on the USB pen supplied together with miniOMNIalog and on SISGEO website in the product section. It is not necessary to install the tool on the PC. Once you extracted it in a PC local folder, simply starting it, […]
FAQ#066 – Why opening the file of log .CSV of OMNIAlog/miniOMNIAlog in French with Microsoft Office Excel some “strange” characters are visualized instead of some letters?
The cause of this is problem is that Excel opens the CSV files with an incorrect encoding. In the CSV files in French, there are some particular characters (example: “é”, “à”) that, to be correctly visualized, need the encoding UNICODE UTF-8. This encoding is not that of default of Excel, so the file is codified […]
FAQ#061 – Does the 2G (GSM/GPRS) modem of miniOMNIAlog support 3G networks?
No. The internal modem of miniOMNIAlog is a 2G (GSM/GPRS) modem and therefore it doesn’t support 3G (UTMS) and superior networks. We recommend to ascertain with your ISP (Internet Service Provider) the presence of the 2G signal in the place chosen to install the datalogger. Otherwise, miniOMNIAlog couldn’t establish an internet connection through its modem. […]
FAQ#059 – Which characters is it possible to use in the editable fields of miniOMNIAlog webpages?
The characters supported by miniOMNIAlog webpages and by the export files are those of the standard ASCII charts (not extended). In addition to all the alphabet letters and numbers, the characters supported are: You can find an example of an ASCII chart at the following link: http://www.asciitable.com/ NOTE: The maximum number of characters for IDENTIFICATION […]
FAQ#058 – To communicate through USB connection with miniOMNIAlog, is it necessary to install some software or driver?
Yes, to communicate with miniOMNIAlog by USB connection a small driver (FTDI Driver) is needed, to permit to the PC to recognize the miniOMNIAlog. Usually, if your PC is already connected to the internet when you connect miniOMNIAlog, Microsoft Windows is able to download and install this driver automatically. If Microsoft Windows does not install […]
FAQ#055 – Using the miniOMNIAlog system, is it necessary the grounding system?
To make efficient and effective the protections of miniOMNIAlog, it is INDISPENSABLE to have a grounding system. The ground is no longer necessary to guarantee quality-measurements (“measurement ground”), but it is considered only as “functional ground”.
