Wika TR33 Manual do Utilizador descarregar pdf (Página 21)

WIKA operating instructions model TR33

14073818.01 01/2014 GB/D

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Medium temperature outside the span

If the media temperature congured in the transmitter exceeds

the span, the transmitter will operate in a linear fashion within the

following limits: 3.8 mA (MRS); 20.5 mA (MRE). If these limits are

exceeded, then an error will be signalled.

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Hysteresis on return to the measuring span

After the linear error limits have been exceeded, on return to the

measuring span, a hysteresis of 0.1 mA must be passed. This

hysteresis prevents the transmitter from jumping back and forth

between error and measuring mode.

Fault signal

Return from fault

signal

Return from fault signal

3.8 ...

4 mA

20 ... 20.5 mA

4 ... 20 mA

3.8 mA 4 mA 20 mA 20.5 mA

3.9 mA 20.4 mA

Fault signal

Error limits and permissible measuring range

6. Commissioning, operation

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