Casella-cel CEL-281 Manual do Utilizador descarregar pdf (Página 68)

All communication is at CMOS logic levels, nominally 0 V and 5.0 V.

The connector is located behind a sliding panel in the bottom of the in-

strument. Figure 12 identifies the line connections in the socket.

3.6 Power Supply

The instrument is powered by four type AAA or LR03 manganese al-

kaline batteries that must be inserted in the battery holder supplied.

They have an operating life in excess of 16 hours.

Zinc carbon and rechargeable nickel cadmium batteries are not suit-

able as their shorter operating life gives the instrument a significantly

reduced operating time.

910009

Figure 13: Inserting the battery pack

How It Works

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Casella-cel CEL-281 Manual do Utilizador Página 68