WIKA TR33 Manual De Instrucciones página 17

5. Commissioning, operation
Do not exceed the following values:
Version with 4 ... 20 mA output signal
■
Power supply and current loop circuit (connections)
Voltage
Current
Effective internal capacitance C
Effective internal inductance
Sensor circuit
Power
Ambient temperature
The maximum self-heating at the probe tip is 4 K
Version with Pt100 and Pt1000 output signal
■
Sensor circuit
Voltage
Current
Effective internal capacitance
Effective internal inductance
Ambient temperature
5.3 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 measuring signal must exist for approx.
1 second in order to return to measuring mode. From the time of the
error detection up to the error signalling, 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.
WIKA operating instructions model TR33
U DC 30 V
i
I 120 mA
i
6.2 nF
i
L 110 µH
i
P 37.5 mW
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]
EN
17