Endress+Hauser Proline Promass O 100HART, Руководство по эксплуатации

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Proline Promass O 100 HART Installation
Hauser 21
Thermal insulation
In the case of some fluids, it is important that the heat radiated from the sensor to the
transmitter is kept to a minimum. A wide range of materials can be used for the required
insulation.
NOTICE
Electronics overheating on account of thermal insulation!
‣
Observe maximum permitted insulation height of the transmitter neck so that the
transmitter head is completely free.
t
a
A0019919
a Minimum distance to insulation
t Insulation thickness
The minimum distance between the transmitter housing and the insulation is
10 mm (0.39 in) so that the transmitter head remains completely exposed.
0
20
60
40
80
[in]
1
2
3
0
t
100
4
[mm]
T
40 (104)
T
60 (140)
80 100 120 140
200 300 400
160 180 200
[°F]
T
m
[°C]
A0023177
 6 Recommended insulation thicknesses depending on the medium and ambient temperature
t Insulation thickness
T
m
Medium temperature
T
40(104)
Insulation thickness with ambient temperature of T
a
= 40 °C (104 °F)
T
60(140)
Insulation thickness with ambient temperature of T
a
= 60 °C (140 °F)
NOTICE
The insulation can also be thicker than the recommended insulation thickness.
Prerequisite:
‣
The temperature at the lower end of the transmitter housing does not exceed
80 °C (176 °F)
‣
Ensure that convection takes place on a sufficiently large scale at the transmitter neck.
‣
Ensure that a sufficiently large area of the housing support remains exposed. The
uncovered part serves as a radiator and protects the electronics from overheating and
excessive cooling.