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Installing
4.2 Mounting
SITRANS SL
Operating Instructions, 12/2010, A5E01132948-04
41
4.2.2
Preparations
CAUTION
Risk of damage due to high temperature
The temperature on the process side of the wedge window must not exceed 200 °C
(392 °F).The maximum permissible temperature of the flange is 70 °C (158 °F). For these
applications we recommend a process-side purging with a permanent temperature
monitoring.
Before the sensor can be installed at the measurement point, process flanges have to be
welded onto the measuring site. The flanges must be compatible with DN50/PN10-40 or
ANSI 4"/150 lb with a minimum inner diameter of 50 mm. The flanges must protrude at least
150 mm from the wall and 0-30 mm into the furnace or funnel. Flange tubes should never be
longer than the purge tube which has a standard length of 340 mm.
If longer flange tubes are needed for any reason customized purging tubes (longer) have to
be used. If you require further information, you can request the required information from
your Siemens contact person. You will find details of your local contact persons over the
Internet. For details see Service and support (Page 201)
①
Customer flange
②
SITRANS SL flange
③
In-line reference cell
④
Gas outlet for the sensor purging
⑤
SITRANS SL body (TTU - Transmitter Tube Unit or RTU - Receiver Tube Unit)
⑥
SITRANS SL housing (THU - Transmitter Housing Unit or RHU - Receiver Housing Unit)
⑦
SITRANS SL lid
Figure 4-1
Receiver unit exploded