ABB PP836 3BDE042237R1 touch screen module

ABB PP836 3BDE042237R1 touch screen module

Technical data of product parameters

The uncertainty of the temperature measurements made throughout the LFS will contribute to the uncertainty of the
calibrator. Platinum resistance temperature detectors (RTDs) are used for all temperature measurements, with twelve and
ten of them placed at various locations along the liquid flow path on the 0.1 L/s and the 2.5 L/s LFS respectively. At PP836 3BDE042237R1
locations deemed critical, the systems have duplicate sensors to improve measurement accuracy.
The model used for the reduction of the various temperatures in the system affects the uncertainty of the LFS results. At
initial and final conditions, the average connecting volume fluid temperature,
, is assumed to be the average value of
the five temperature readings (each LFS has five RTDs along the connecting volume) made along the fluid pathis classified as a Type B uncertainty for each RTD. During calibration of the RTDs, a minimum of five data points are
collected at each temperature set point. The root-sum-square of the uncertainties from the reference sensor, the sample
standard deviation of the measurements at each set point, the data regression, and the sensor drift over its calibration
interval gives the combined uncertainty of each RTD. In the worst case,The pressure transducers are calibrated every five years against a pressure reference that is traceable to the NIST group
responsible for pressure calibrations. The three to four calibration coefficients and the pressure uncertainty for each PP836 3BDE042237R1
transducer are obtained using a linear regression method. The uncertainty in the reference pressure (0.01 %) is classified
as a Type B uncertainty for each transducer. The root-sum-square of the uncertainties from the reference sensor, data
regression, and estimated drift between calibrations gives the combined uncertainty of each transducer.s the averaged internal diameter of the connecting pipe and PP836 3BDE042237R1
is its length. There is significant
uncertainty associated with the estimation of the quantities needed to compute the connecting volume: piping inside
diameters, piping lengths, internal volumes of the valves and elbows, the unswept volume in the LFS, the extra connecting
volumes associated with the piping used for different MUTs, etc. However, as shown in Tables 6 and 7 below, the
sensitivity of the volumetric flow through the MUT to the connecting volume is quite small. The large uncertainty of the
connecting volume will result only 0.1 part in 106 of flow uncertainty in the case of the 0.1 L/s LFS. This is because the
change in density of the fluid in the connecting volume during a flow measurement is small (the temperature profile is
quite stable) and because the connecting volume is small in size compared to the volume swept out by the piston.
Furthermore, the uncertainties related to dimensional changes of the control volume due to thermal expansion are even
smaller and are neglected.

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