Weidmuller CNDAR - Universal galvanically isolated signal con Manual de usuario descargar pdf (Pagina 16)

CND/AR

• Operation

General

The CND/AR measures conductivity using conductance cell and Pt100

for temperature compensation. It displays the conductivity at the

reference temperature, produces a proportional analogue current/

voltage output and has two alarm channels.

Cleaning

The case can be wiped with a damp cloth. De-energise the unit before

cleaning.

Conductance (Ω

-1

), Conductivity (Ω

-1

) and Probe factors

The conductance measurement is the inverse of the resistance

between the two probes. This depends on properties of the probe, like

the distance between them. The probe factor P

gives the relationship

between measured conductance M

and the actual conductivity

measurement C, so that

C = M

x P

CND/AR block diagram

Cell Conductance

Analogue Output

Alarm 1

Alarm 2

Power Supply

Cell Temperature

(RTD)

1 2 ... 11 12 13 14 15 16 17 18 19 20 21 ... 27 28

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Weidmuller CNDAR - Universal galvanically isolated signal con Manual de usuario Pagina 16