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SI 173O-B
Tab. 1
Zone 20 application
Maximum permitted
medium temperature
(Process connection)
Probe in zone 20 or zone 21
+80 °C
+95 °C
+130 °C
+150 °C
Tab. 2
Thermal Data:
Maximum permitted ambient temperature
Maximum surface temperature
at +40 °C ambient temperature
Maximum surface temperature
at +80 °C ambient temperature
Maximum surface temperature for probe
ambient temperatures > 80 °C and whilst
simultaneously maintaining the ambient tempe-
rature at the electronics housing in accordance
with the Tab. 1
SI 173O-B/98/en/03.04
52022774
FM7.0
Pulscon LTC with HART, PROFIBUS PA or Foundation Fieldbus
Maximum permitted ambient temperature at the electronics housing (electronics housing in zone 21)
LTC with
LTC with
¾" probe,
¾" probe and
compact
remote
electronics/
distance sleeve
+75 °C
+75 °C
+70 °C
+70 °C
+65 °C
+70 °C
+65 °C
+70 °C
Probe
in
Category 1
(zone 20)
-40 °C ... +150 °C
+40 °C
+75 °C
... +150 °C
(identical to process temperature)
dependent on the medium temperature
LTC with
1½" probe,
compact
+75 °C
+70 °C
+65 °C
+65 °C
Category 2
(zone 21)
+45 °C
+80 °C
+80 °C
LTC with
LTC with
1½" probe and
remote
remote
electronics/
electronics/
distance hose
distance sleeve
+75 °C
+75 °C
+70 °C
+75 °C
+70 °C
+75 °C
+70 °C
+75 °C
Electronics housing
in
Category 3
(zone 22)
-40 °C ... +75 °C
+42 °C
+77 °C
+77 °C
52022774
122412 03/04 02
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