Molunghi landslide monitoring, Italy
Study and monitoring of Molunghi landslide The monitoring project of Molunghi landslide is the result of the cooperation between the Comune di Calice al Cornoviglio and the Road Department of La Spezia Province and it is began in consequence of the instability of both the provincial street and part of Monlunghi di Mezzo inhabitat during […]
FAQ#116 – How do I configure a WR-Log digital node to read RS485 Sisgeo TIMED sensors?
Sisgeo digital instruments can operate in two powering modes: TIMED or ALWAYS-ON (for more information see F.A.Q.#094).A string of mixed instruments consisting of TIMED gauges and ALWAYS-ON gauges cannot work.The first thing to do is therefore to check that ALL connected instruments in your array are set to TIMED mode.You can check the powering mode […]
FAQ#111 – Why I cannot read correctly my 4-20mA current loop gauge?
It could be a problem connected to the power supply given by the readout or logger. When the power supply is in the current loop (2-wire gauge) it is necessary to consider the effect of voltage drop across the shunt resistor on the voltage applied to the gauge. For example, suppose a 4-20mA gauge requires […]
FAQ#110 – What’s the purpose of the linear and polynomial factors written in the Calibration Reports?
Utilize the Linear Sensitivity Factors (A, B) and Ploynomial Sensitivity Factors (A, B, C, D) of the Calibration Reports permit to obtain readings in engineerig units with a maximum error as for the Calibration Report. In the case of analogue gauges, the factors shall be applied on the electrical readings (i.e. mA, mV, digit, etc…) […]
FAQ#095 – How long does a chain of digital sensors take to be read?
It mainly depends from the powering mode of the gauges (refer to FAQ#094 for the description of the powering modes). AN EXAMPLE WILL BETTER CLARIFY THE ANSWER. In a batch of 240 gauges, unless otherwise requested by the Customer, the addresses are settled from #001 up to #240. In a borehole is installed a chain of 30 […]
FAQ#094 – Which are the available powering modes for SISGEO digital sensors?
All SISGEO digital gauges can be settled in two different powering mode: The STANDARD powering mode is ALWAYS ON, so unless otherwise requested by the Customer, the sensors are settled as default in ALWAYS ON.
FAQ#087 – Could the IPI, BH Profile and DEX probes have problems in frozen water?
Sisgeo suggest that frozen water within the inclinometer casings is to be avoided due to following reasons: – Ice within the casing will affect functionality of the systems by blocking the individual probes;– Mechanical damages can occur to the probes, but also to the inclinometer casing due to the expansion of frozen water In any […]
FAQ#077 – Quelles sont les longueurs maximales de câble depuis l’instrument jusqu’à l’enregistreur de données?
Les longueurs de câble maximales dépendent de plusieurs facteurs, et en premier lieu le mode d’installation et les protections de câble (blindage, terre, etc…). En supposant que les instruments sont installés selon les règles de l’art, les suggestions suivantes devraient être prises en compte pour la longueur maximale de câble: INSTRUMENTS NUMERIQUES: voir FAQ#073 INSTRUMENTS […]
FAQ#076 – Pourquoi est-il nécessaire d’ajouter une résistance de terminaison au dernier capteur numérique de chaque chaîne RS-485?
Tous les instruments numériques SISGEO (IPI, clinomètres, H-Level…) utilisent le protocole de communication série RS-485. Le protocole RS485 requiert l’ajout d’une résistance de terminaison. La connexion recommandée pour une chaîne utilise des nœuds « point à point » (multidropped) en mode bus (line). Les connexions réseau en étoile, circulaires ou ramifiées ne sont pas recommandées. […]
FAQ#075 – What parameters are saved in SISGEO digital sensors? What information must the Customer provide when ordering?
All SISGEO digital sensors (e.g. IPI, BH Profile, MD Profile, LT Inclibus, Tilt-meter, RDS, H-Level, etc.) use the Modbus communication protocol over RS-485 serial. SISGEO digital sensors are connected to each other with a single signal cable. The parameters that are configured at the factory for each digital sensor are as follows: Upon confirmation of […]
FAQ#074 – Quel type d’enregistreur de données est nécessaire pour lire les mesures des capteurs numériques SISGEO?
Les relevés des capteurs sont lus en connectant le câble à une unité maîtresse Modbus (à savoir, OMNIAlog ou miniOMNIAlog) avec une interface RS-485 (DCE, Half duplex, no Echo) en mesure de gérer la communication avec le protocole de communication Modbus RTU SISGEO. La documentation relative au protocole de communication de SISGEO est disponible sur […]
FAQ#073 – Quel est le nombre maximal de capteurs numériques (RS-485, Modbus), le nombre maximal de chaînes et la longueur maximale du câble dans un réseau RS-485?
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 […]