User`s manual

<4. Installation>
4-3
IM 01C25B01-01E
4.4 Swapping the High/Low-
pressure Side Connection
IMPORTANT
This section is applicable only for EJ110,
EJ120, and EJ130 differential
transmitters, and not applicable for gauge or
absolute pressure transmitters.
4.4.1 Rotating Pressure-detector Section
180°
This procedure can be applied only to a transmitter
with a vertical impulse piping type.
The procedure below can be used to turn the
pressure detector assembly 180°. Perform
this operation in a maintenance shop with the
necessary tools laid out and ready for use, and then
installthetransmitterintheeldaftermakingthe
change.
1) Use an Allen wrench (JIS B4648, nominal 2.5
mm) to remove the two setscrews at the joint
between the pressure-detector section and
transmitter section.
2) Leaving the transmitter section in position,
rotate the pressure-detector section 180°.
3)Tightenthetwosetscrewstoxthepressure-
detector section and transmitter section
together(atatorqueof1.5N·m).
Reposition the process connector and drain
(vent) plugs to the opposite side as described in
subsection 4.3.
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Process connector
Setscrew
Before
After rotating 180°
Figure4.5 BeforeandAfterModication
4.4.2 Using the Communicator
This method is applicable only to the Model
EJ110, EJ120, and EJ130.
With a communicator, you can change which
process connection is used as the high-pressure
side without mechanically rotating the pressure-
detector section 180 as described in subsection
4.4.1. To change, call parameter ‘D15: H/L SWAP’
for BRAIN Communication or ‘H/L swap’ for HART
Communication and select REVERSE (right side:
low pressure; left side: high pressure) or select
NORMAL to change back to normal (right side: high
pressure; left side: low pressure).
Output
Input
NORMAL
REVERSE
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Figure 4.6 Input/Output Relationship
IMPORTANT
Since the H/L label plate on the capsule
assembly will remain unchanged, use this
function only when you cannot switch the
impulse piping. If the ‘H/L SWAP’ parameter
setting is changed, the input/output relationship
isreversedasshowningure4.6;besurethisis
understood by all.