Operation of the Transmitter Yamatake Corporation
5-44 ST3000 Smart Transmitter Series 900 Electronic Differential Pressure/Pressure Transmitter
5-7 : Measurement with Model STH/STU
When starting operation, adjust the transmitter in its actual process state. The specific
gravity of the sealed-in liquid is stated in the specifications in Appendix A. Specific
gravity changes with temperature at the rate of 0.0008/°C. Use the temperature of the
capillary tube for items related to specific gravity, in this section.
5-7-1 :Pressure Measurement
5-7-1-1 Preparation for Measurement
When setting the zero point, set all the diaphragm surface area to be wet with the mea-
sured liquid for high accuracy. Even when the diaphragm surface area is not com-
pletely wet, make sure that the zero point is set at a level higher than the center of the
diaphragm.
Figure 5-4
100 % Liquid Level
0 % Liquid Level
ariable
ead
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