WIKA TR31-3 Betriebsanleitung Seite 17

3. Specifications
Safety-related maximum values for the current loop circuit
Thermometer with transmitter and 4 ... 20 mA output signal
■
(model TR31-x-x-TT)
Parameters
Terminals
Voltage U
i
Current l
i
Power P
i
Effective internal capacitance C
Effective internal inductance L
Maximum self-heating at the
sensor or thermowell tip
Thermometer with direct sensor output with Pt100
■
(model TR31-x-x-Px) and Pt1000 (model TR31-x-x-Sx)
Parameters
Terminals
Voltage U
i
Current l
i
Power P
i
Effective internal capacitance C
Effective internal inductance L
Maximum self-heating at the
sensor or thermowell tip
For further specifications see WIKA data sheet TE 60.31 and the order
documentation.
WIKA operating instructions models TR31-3, TR31-K (Ex i)
Hazardous gas
atmosphere
+ / -
DC 30 V
120 mA
800 mW
29.7 nF
i
negligible
i
15 K
Hazardous gas
atmosphere
1 - 4
DC 30 V
550 mA
1,500 mW
negligible
i
negligible
i
(R ) = 335 K/W
th
Hazardous dust
atmosphere
+ / -
DC 30 V
120 mA
750/650/550 mW
29.7 nF
negligible
15 K
Hazardous dust
atmosphere
1 - 4
DC 30 V
250 mA
750/650/550 mW
negligible
negligible
(R ) = 335 K/W
th
17
EN