IM 01C25C01-01E
7-4
7. OPERATION
7.5.3 Draining Condensate for Flushing
Connection Ring
1) Gradually open the drain screw to drain from the
flushing connection ring.
2) When the flushing connection ring is completely
drained, close the drain screw.
3) Tighten the drain screw to a torque of 10 N·m
{1 kgf·m}.
F0706.EPS
Drain screw
When you loosen the drain screw,
the accumulated liquid(or gas)
will be expelled in the direction of
the arrow.
Figure 7.3
Draining for Flushing Connection Ring
7.5.4 Venting Gas for Flushing Connec-
tion Ring
1) Gradually open the vent screw to vent gas from the
flushing connection ring.
2) When the flushing connection ring is completely
vented, close the vent screw.
3) Tighten the vent screw to a torque of 10 N·m
{1 kgf·m}.
F0707.EPS
Vent screw
When you loosen the vent screw,
the accumulated liquid(or drain)
will be expelled in the direction
of the arrow.
Figure 7.4
Venting for Flushing Connection Ring
7.6 Setting the Range Using the
Range-setting Switch
WARNING
The range setting switch must not be used in the
hazardous area.
When it is necessary to use the switch, operate
it in a non-hazardous location.
When pressure is applied to the transmitter, the low-
and high-limit values for the measurement range (LRV
and URV) can be changed (re-ranged) using the range-
setting switch (push-button) located on the optional
integral indicator plate and the external zero adjustment
screw. This procedure does not require use of the
communicator. However, changes in the scale range
and engineering unit display settings for the integral
indicator require use of the communicator.
Follow the procedure below to change the LRV and
URV settings.
[Example]
Rerange LRV to 0 and HRV to 50 kPa.
1) Connect the transmitter and apparatus as shown in
Figure 8.1 and warm it up for at least five minutes.
2) Press the range-setting push-button.
The integral indicator then displays “LRV.SET.”
3) Apply a pressure of 0 kPa (atmospheric pressure) to
the transmitter.
(Note 1)
4) Turn the external zero-adjustment screw in the
desired direction. The integral indicator displays the
output signal in %.
(Note 2)
5) Adjust the output signal to 0% (1 V DC) by
rotating the external zero-adjustment screw. Doing
so completes the LRV setting.
6) Press the range-setting push-button. The integral
indicator then displays “URV.SET.”
7) Apply a pressure of 50 kPa to the transmitter.
(Note 1)
8) Turn the external zero-adjustment screw in the
desired direction. The integral indicator displays the
output signal in %.
(Note 2)
9) Adjust the output signal to 100% (5 V DC) by
rotating the external zero-adjustment screw. Doing
so completes the URV setting.
10)Press the range-setting push-button. The transmitter
then switches back to the normal operation mode
with the measurement range of 0 to 50 kPa.
