WIKA TR33 - Handbuch (Seite 21)

GB
WIKA operating instructions model TR33
14073818.01 01/2014 GB/D
21
■ Medium temperature outside the span
If the media temperature configured 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.
■ 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