Modulo per la misura di tensioni
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La misura più comune in un sistema di acquisizione è quella relativa alla tensione e corrente. Monitorando questi due parametri è possibile collegare sensori personalizzati.
Vediamo in dettaglio quli sono i moduli che mette a disposizione il nostro sistema di datalogging.
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Modulo analogico
Questo modulo è stato pensato per leggere tensioni da 0-42V con risoluzione di 12bit. E' dotato di un uscita in tensione con gli standard 3.3V o 5V a cui è possibile collegare un trasduttore oppure un potenziometro. Il modulo è completo ed è ideale per leggere le informazioni provenienti da trasduttori industriali o elementi autocostruiti.
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| Parametro | Valore |
|---|---|
| Consumo di corrente | 30mW (6mA at 5V) |
| Tensione misurata | 0V - 42V (DC) in 1mV steps, 12bit resolution (~10mV) |
| Corrente di output max | 150mA (3.3V), 150mA (5V) |
| Dimensioni (W x D x H) | 35 x 30 x 14mm (1.38 x 1.18 x 0.55") |
| Peso | 8g |
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Modulo analogico industriale
Si tratta di un modulo analogico con 2 ingressi differenziali da -35V a 35V dotato di un ADC a 24bit. Consente di leggere con precisione tensioni bipolari. Anche in questo caso è presente una sezione di alimentazione 5V o 3.3V che consente di alimentare in modo autonomo tradusttori industriali oppure trasduttori autocostruiti.
L'alta risoluzione del convertitore consente di avere una precisione molto elevata su tutto il range di misura del sensore.
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| Parametro | Valore |
|---|---|
| ADC | MCP3911 |
| Consumo di corrente | 15mW (3mA at 5V) |
| N. Canali | 2 |
| Range di misura | -35V to +35V (DC) |
| Risoluzione | 24bit |
| Accuratezza | 0.1% / ±4mV full scale |
| Massima corrente in uscita | 150mA (3.3V), 150mA (5V) |
| Dimensioni (W x D x H) | 40 x 40 x 11mm (1.57 x 1.57 x 0.43") |
| Peso | 9g |
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