3-18
Chapter 3 Starting and Stopping this Device
3-2-4 Sealed Tank (Wet Leg) Liquid Level Measurement
(1) Preparing for Operation
(i) Important points
Warning
When clearing vents and drains, check the direction in which material will come out in
order to avoid any contact with the human body. There is a danger of scalding and other
harmful health effects. If the process fluid is harmful to the human body, take safety
measures such as wearing goggles or a mask so that it does not adhere to the skin or the
eyes, become inhaled, etc.
Caution
Check that the process is in manual control mode. If it is in automatic control mode, be
sure to switch it to manual control mode before starting work.
In terms of piping, before commencing operation of this device as shown below, the
master valves, drain valves, gas vent plugs, and the stop valve of the three-way manifold
valve must be closed on both the high pressure and low pressure sides. In addition, check
that the equalizer valve of the three-way manifold valve is in the open state. (See Figure 2-41)
(ii) Calculating the setting range
To find the setting range based on calculation, see section 3-10.
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