Yokogawa EJX430B - Manual (Page 33)

<7. Operation>
7-1
IM 01C27B01-01EN
7. Operation
7.1 Preparation for Starting
Operation
This section describes the operation procedure
for the EJX110B as shown in figure 7.1 (vertical
impulse piping type, high-pressure connection:
right side) when measuring the liquid flow rate, and
EJX430B as shown in figure 7.2 when measuring
pressure.
NOTE
It is required to set security and network
information to enable the transmitter to be
connected to the Field Wireless Network. For
more details, refer to section 7.4 “Connecting to
the Field Wireless Network”.
NOTE
Check that the process pressure tap valves,
drain valves, and 3-valve manifold stop valves
on both the low pressure and high pressure
sides are closed, and that the 3-valve manifold
equalizing valve is opened.
(a) Follow the procedures below to introduce
process pressure into the impulse piping and
transmitter.
■ Differential Pressure Transmitters
1) Open the low pressure and high pressure tap
valves to fill the impulse piping with process
liquid.
2) Slowly open the high pressure stop valve to fill
the transmitter pressure-detector section with
process liquid.
3) Close the high pressure stop valve.
4) Gradually open the low pressure stop valve and
completely fill the transmitter pressure-detector
section with process liquid.
5) Close the low pressure stop valve.
6) Gradually open the high pressure stop valve. At
this time, equal pressure is applied to the low
and high pressure sides of the transmitter.
7) Check that there are no liquid leaks in the
impulse piping, 3-valve manifold, transmitter, or
other components.
■ Gauge/Absolute Pressure Transmitters
1) Open the tap valve (main valve) to fill the
impulse piping with process fluid.
2) Gradually open the stop valve to introduce
process fluid into the transmitter pressure-
detector section.
3) Confirm that there is no pressure leak in
the impulse piping, transmitter, or other
components.
(b) Venting Gas from the Transmitter Pressure-
detector Section
Since the piping in the example of figure 7.1
is constructed to be self-venting, no venting
operation is required. If it is not possible to
make the piping self-venting, refer to subsection
7.5 for instructions. Leave the equalizing valve
open even after venting gas.
(c) Insert batteries into the battery case, and install
to the transmitter. To insert batteries into the
battery case, be careful to polarity of batteries
and battery case. For details of Installation of
battery, refer to section 9.4.6 and 9.4.7.
Battery case is installed in the transmitter when
shipped from the factory, however, batteries are
sold separately and not included.
(d) Using the device configuration tool, confirm
that the transmitter is operating properly. Check
parameter values or change the setpoints as
necessary.
Integral Indicator’s indication can be used
to confirm that the transmitter is operating
properly. For details on how to confirm, refer to
subsection 8.4 “Self-Diagnostics.”
ISA100 devices display self-diagnostic
information in an easy-to-understand manner
using four categories (Check function,
Maintenance required, Failure, and Off-
specification) according to NAMUR NE107*.
* NAMUR NE107 “Self-Monitoring and Diagnosis of Field
Devices”