6. Commissioning, operation
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.
3.8 mA
Error
signalling
Error signalling
3.9 mA
Error limits and permissible measuring range
WIKA operating instructions model TR33
4 mA
3.8 ...
4 ... 20 mA
4 mA
Measuring mode
20 mA
20.5 mA
20 ... 20.5 mA
signalling
Error signalling
20.4 mA
EN
Error
23