Intek RheoVac 950 - Manual (Page 3)

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Figure 1 RheoVac Model 950
SECTION 1 — GENERAL INFORMATION
1.1 INTRODUCTION
For the first time, all necessary properties of the gases in the condenser exhauster line are directly
measured to provide an accurate determination of air in-leakage and condenser performance related
parameters. These properties are measured to provide the power industry with the most advantageous
and complete product for condenser system diagnostics:
the RheoVac
®
System*
*USPNs 4,255,648; 5,485,754; 5,752,411; 6,526,755
A model 950 RheoVac system consists of one, two or three probes reporting to a central signal
conditioner and processor unit. The sensing probe, consisting of multiple sensors configured in a single
probe head, is installed in the vacuum line between the condenser and the exhauster. The RheoVac
system is superior to all other methods in that it makes no assumptions about the dynamic condenser and
vacuum line environment. The sensor head employs the patented Rheotherm
® technology to provide
an accurate mass flow measurement. Additionally, temperature, pressure and water vapor relative
saturation measurements are made using a high accuracy platinum resistance temperature detector
(RTD), a strain gauge pressure sensor and a specially configured and calibrated water vapor saturation
sensor.