Slurries; Two-Phase Liquids; Viscous Liquids; Temperature And Pressure Ratings - Siemens SITRANS F Operating Instructions Manual

Section 5
1010PFM-3G
NOTE: Before performing the installation routine, allow enough time for the liquid to flush out
all air trapped in the pipe.

5.4.7 SLURRIES

High-density undissolved solids (e.g., sand slurry) may cause application problems if present in suffi-
cient quantity to scatter the sonic beam significantly. Low-density solids, such as organic materials,
coal slurries and unaerated sewage sludge, are usually adequate sonic conductors and their sonic
impedance is very close to most liquids. Excessive mineral solids though could trigger the aeration
alarm.

5.4.8 TWO-PHASE LIQUIDS

Two-phase liquids (e.g., oil and water) cause some sonic beam scattering. However, these usually
conduct sonic beams sufficiently for proper operation (unless heavy aeration is present also). Two-
phase liquids with large quantities of different components, such as sand or free gas, could prove to be
too attenuative for transit-time operation. However, switching to Reflexor mode will keep the meter
operational under these circumstances.

5.4.9 VISCOUS LIQUIDS

Highly viscous liquids tend to "absorb" some of the energy of the sonic beam. This causes a reduction
of signal amplitude when compared to low viscosity liquids. However, most high viscosity liquids are
sufficiently conductive for acceptable operation. A low Valc % value usually indicates low sonic conduc-
tivity.

5.4.10 TEMPERATURE AND PRESSURE RATINGS

We rate our standard (universal) transducers for operation up to 250°F. We offer High (H) temperature
flow transducers rated for operation up to 375°F. We also manufacture Very High (VH) temperature
°
transducers for applications where the temperature exceeds 375°F, but is less than 450 F. Please
refer to Section 6 for flow tube pressure and temperature ratings.
5.5

OVERVIEW OF SYSTEM 1010P MEMORY RESOURCES

System 1010P's memory resources include Read-Only-Memory (ROM) and battery-backed Random
Access Memory (RAM). The ROM memory contains the system operating instructions, on-line help
text, default data, and the pipe, transducer and liquid tables. The flowmeter uses 256K bytes of RAM
(standard) or 1 Meg (optional) to provide three discrete storage functions:
Active Memory - Site Storage Memory - Datalogger Memory.
Upon creating a site, the meter copies all ROM-based defaults into the meter's operational database,
the Active Memory. This provides two advantages. First, RAM-based operation increases performance.
Second, this creates an immediate Site Setup, based on the meter's defaults.
To make the meter operational, you just have to enter the required data (e.g., pipe and transducer data)
and edit other default settings to suit your application. When you program the meter, all your entries are
retained in the Active Memory. This enables you to use the meter immediately after finishing a Site
Setup. You're not limited to one set of site parameters. You can copy site data from Active Memory to
Site Storage Memory.
Site Storage Memory provides permanent storage area for several inactive Site Setups. The multi-site
storage feature allows rapid reinstallation at many locations. All you have to do to reactivate an inactive
Site Setup is to recall it back into to Active Memory. However, be aware that this action over-writes ALL
data residing in the Active Memory area.
5-6