USER'S GUIDE____________________________________________________________________
34 __________________________________________________________________ M210762EN-D
Description of the Cooling Set
304
164
112.5
15
8
27.5
ø2
0
125
ø
105
ø
118
ø2
8
120
40.6
mounting
flange
sintered
filter
ø
88.9
(fixed on top of
the cooling set)
cooling element
cooling fins
Figure 18
Cooling Set Dimensions (in mm)
The cooling set consists of a cooling element and removable cooling fins.
The cooling fins are meant to be installed in applications where the
process temperature and dewpoint are continuously in the range indicated
in Figure 19 on page 35 (Measurement Ranges With and Without the
Cooling Fins). However, if there is a possibility that the dewpoint is
above this range, the measurements have to be taken without the cooling
fins in order to avoid condensation.
The flow rate and ambient temperature have an effect on the cooling rate.
In Figure 19, it is assumed that ambient temperature is +25 °C. When
ambient temperature is raised by +10 °C, the measurement ranges with
and without cooling fins rise approxi6 °C. Correspondingly,
every -10 °C change in ambient temperature changes the ranges by
approximately -6 °C. It is recommended that after installing the
transmitter without the cooling fins, the transmitter is allowed to stabilize
and then the SSR reading is checked either from the local display or with
a terminal connected to an RS line. If the SSR reading is below 20 %, it
is recommended that the cooling fins are installed.
NOTE
Make sure that the upper limit of the dewpoint measurement range is not
exceeded in low temperatures as this would lead to condensation.
