WIKA TR33 Manual De Instrucciones página 22

6. Commissioning, operation
Do not exceed the following values:
Version with 4 ... 20 mA output signal
■
Power supply and current loop circuit (connections)
EN
Voltage
Current
Effective internal capacitance C
Effective internal inductance
Sensor current loop
Power
Ambient temperature
The maximum self-heating at the sensor tip is 4 K
Version with Pt100 and Pt1000 output signal
■
Sensor current loop
Voltage
Current
Effective internal capacitance
Effective internal inductance
Ambient temperature
6.3 Behaviour of the 4 ... 20 mA electrical output signal
Sensor break and short-circuit
■
Sensor break or short-circuit are signalled after positive detection
(after approx. 1 second). If this fault condition has been caused by
a malfunction, then a relevant measurement signal must exist for
approx. 1 second in order to return to measuring mode. From the time
of the error detection up to the fault signal, the last relevant measured
value will be delivered on the current loop.
Therefore, in the event of a "true" sensor break or short-circuit, this
is also signalled permanently. In the event of a "false" sensor break
or short-circuit, the transmitter has the possibility of reverting to
measuring mode.
22
U DC 30 V
i
I 120 mA
i
6.2 nF
i
L 110 µH
i
37.5 mW
P
o
-40 ... +85 °C (-40 ... +185 °F)
U DC 30 V
i
I 550 mA
i
negligibly small
negligibly small
-40 ... +85 °C (-40 ... +185 °F)
WIKA operating instructions model TR33