User`s manual

<7. Operation>
7-5
IM 01C25B01-01E
7.5 Venting or Draining
Transmitter Pressure-
detector Section
Since this transmitter is designed to be self-
draining and self-venting with vertical impulse
piping connections, neither draining nor venting
willberequirediftheimpulsepipingiscongured
appropriately for self-draining or self-venting
operation.
If condensate (or gas) collects in the transmitter
pressure-detector section, the measured pressure
maybeinerror.Ifitisnotpossibletocongurethe
piping for self-draining (or self-venting) operation,
you will need to loosen the drain (vent) screw on the
transmitter to completely drain (vent) any stagnated
liquid(gas.)
However, since draining condensate or bleeding off
gas disturbs the pressure measurement, this should
not be done when the loop is in operation.
WARNING
Sincetheaccumulatedliquid(orgas)maybe
toxic or otherwise harmful, take appropriate care
to avoid contact with the body, or inhalation of
vapors.
7.5.1 Draining Condensate
1) Gradually open the drain screw or drain plug
and drain the transmitter pressure-detector
section.(Seegure7.5.)
2) Whenallaccumulatedliquidiscompletely
removed, close the drain screw or drain plug.
3) Tightenthedrainscrewtoatorqueof10N·m,
andthedrainplugtoatorqueof34to39N·m.
When you loosen the drain screw or drain
plug, the accumulated liquid will be expelled
in the direction of the arrow.
F0706.ai
Drain screw
Drain plug
Figure 7.5 Draining the Transmitter
7.5.2 Venting Gas
1) Gradually open the vent screw to vent gas from
the transmitter pressure-detector section. (See
gure7.6.)
2) When the transmitter is completely vented,
close the vent screw.
3) Tightentheventscrewtoatorqueof10N·m.
When you loosen the vent screw, the gas
escpes in the direction of the arrow.
F0707.ai
Vent screw
Vent screw
Figure 7.6 Venting the Transmitter
7.6 Local Parameter Setting
WARNING
The local push button on the integral indicator
must not be used in a hazardous area. When it is
necessary to use the push button, operate it in a
non- hazardous location.
IMPORTANT
• Donotturnoffthepowertothetransmitter
immediately after performing parameter
setting. Powering off within 30 seconds of
performing this procedure will return the
parameter to its previous setting.
• TheparameterofExtSWmustbe“Enabled”
toperformthisconguration.Seetheuser’s
manual IM 01C25T (HART/BRAIN) for the
setting procedure.
• TheLocalParameterSettingfunction
is available with HART or BRAIN
communication type.
LCD update will be slower at low ambient
temperature, and it is recommended to use
LPS function at temperatures above -10
degrees C.