Siemens SITRANS F FCS400 Quick Start Manual page 3

Figure 3-1 Liquid applications, wrong location with trapped air/gas
● Gas applications
Vapor condensation or oil traces in the gas may result in erroneous measurements.
– Do not install the flowmeter at the lowest point of the system.
– Install a filter.
Figure 3-2 Gas applications, wrong location with trapped oil
Flow direction
The calibrated flow direction is indicated by the arrow on the sensor. Flow in this direction will be indicated as positive by
default. The sensitivity and the accuracy of the sensor do not change with reverse flow.
The indicated flow direction (positive/negative) is configurable.
CAUTION
Accurate measurement
The sensor must always be completely filled with process media in order to measure accurately.
Orienting the sensor
The sensor operates in any orientation. The optimal orientation depends on the process fluid and the process conditions.
Siemens recommends orienting the sensor in one of the following ways:
1. Vertical installation with an upwards flow (self-draining)
Figure 3-3 Vertical orientation, upwards flow
FCS400 sensor
A5E03649755-008, 05/2014
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