Controlotron 1010PVDN, Полевой руководство

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2-19
1010PVNFM-3A
Section 2
2.3.3 HOW TO SELECT A PIPE TEMPERATURE RANGE
This menu cell informs the flow computer about the expected temperatures that the transduc-
ers will be subjected to during operation. The default setting, -30
0 F to 225 0 F corresponds with
the rated temperature range of our standard 991 or 1011 series transducers. The other selec-
tions provide higher upper limits of 375
0 F and 450 0 F respectively.
If you know that the pipe temperature will exceed 250 0 F at the transducer mounting lo-
cation, please use this menu cell to select the appropriate range. This will allow the flow
computer to restrict its transducer recommendations to the appropriate environmentally rated
types.
γγγγγ
n
=
e
where:
γ
n
= Kinematic viscosity at current measured temperature (cS)
e = Base of natural logarithms
V
SLP
= Viscosity Slope (i.e., -0.0287)
ê t = Current Measured Temperature minus Base Temperture (degrees F)
γ
b
= Visc @ Base Temperature (cS)
( )
V
SLP
x
ê ê ê ê ê
t + ln (
γγγγγ
b
)
To select a Temperature Range:
To access the [Temperature Range] option list press
To highlight the desired range press
To register your selection press
2.3.4 PIPE CONFIGURATION
The [Pipe Configuration] menu cell in the Application Data menu presents a list of descrip-
tions of piping configurations that could affect the flow profile characteristics (such as “Single
Elbow”). Examine the option list. Selecting a piping configuration that closely approximates
conditions at or near your mounting location allows the flow computer to compensate for the
effect of upstream piping on flow profile. The number of diameters between the upstream
configurations and the transducer installation can be numerically entered via the [Anomaly
Diams] menu cell.
To select a Piping Configuration:
To access the option list press
To highlight the desired piping configuration press
To register selection press
ENT
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