Channel Functions; Transit-Time Mode; Clamp-On; Flow Tube - Siemens SITRANS F Operating Instructions Manual

Section 1
1.4

CHANNEL FUNCTIONS

The system's multi-tasking software allows you to operate one channel in Reflexor mode simulta-
neously with the other channel operating in Transit-Time mode. In addition, Transit-Time mode sup-
ports both clamp-on and in-line transducers.

1.4.1 TRANSIT-TIME MODE

All the 1010 models use transit-time flow measurement technology varying only in functionality and
environmental housings. System 1010 improves the MultiPulse signal detection first used in 990 mod-
els by incorporating Siemens' new Digitally Coded MultiPulse technology (DCM) featuring AutoMark
receive signal detection.

Clamp-On

Entirely non-invasive - installs in minutes without having to cut pipe or interrupt flow.
Eliminates calibration errors due to wear - no moving parts and no contact between transducer
and liquid.
Operates bidirectionally - no special meter runs required.
Works with most liquids flowing through metal or plastic pipes, including pipes with plastic,
glass, epoxy and cement liners.

Flow Tube

The 992DFT and 1011FT flow tubes are the ideal solution for line sizes of three inches or under and for
extremely low flow applications. Our flow tubes feature considerably less pressure drop than compet-
ing flowmeters such as coriolis or vortex shedding types.

Clamp-on Spool

The 1013S clamp-on spool supports applications with typically larger line sizes and volumetric flow
rates than the 990 DFT or 1011FT flow tubes. It is intended for users that require a known and guaran-
teed intrinsic calibration.
1.4.2 REFLEXOR
The System 1010 transit-time flowmeter is immune to the effects of liquid non-homogeneity caused by
the inclusion of air or solid particulate. However, sonic beam scattering may occur when mineral-
based solids or gaseous content is a high percentage of the volume. This can cause difficulty in oper-
ating the 1010 in transit-time mode due to signal attenuation. Liquid conditions that may be unsuitable
for transit-time operation, actually aid Reflexor flow detection.
Dual-channel portable systems allow operation with one transit-time channel and one Reflexor chan-
nel measuring flow on the same pipe. There are some conditions though, such as an empty pipe,
which do not permit operation in either Transit-Time or Reflexor mode.
MODEE
1-7
1010PFM-3G