3-35
Chapter 3 Starting and Stopping this Device
3-6 Measurement Using the JTH/JTS Model
At the start of operation, make adjustments while the process is in its actual state.
3-6-1 Liquid Level and Pressure Measurement
(1) Preparing for Operation
(i) Checking the minimum liquid level (zero position) and zero point input
during input equalization
The zero position liquid level is taken to be the center of the seal diaphragm on the surface of the
process connection flange of the device (see Figures 3-8 and 3-9). As a result, the measurement range
H extends from the center of the transmitter flange to the height of the usage range. However, when
performing the zero point check, lower the liquid level to a point below the bottom of the seal diaphragm.
Figure 3-8. Minimum Liquid Level Characteristics
100% Level
0% Level
H
Zero Point
Check Level
Figure 3-9. Zero Position Determination
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