Ex d IIB + H
2
T 6 (-40
º
C
≤
Ta
≤
70
º
C)Gb
Ex tb IIIC IP65
T85
º
C (-40
º
C
≤
Ta
≤
70
º
C)Db
II 2GD IP65
for Electrical input options A in combination with Electrical
Output options A, E, & H and input options B thru G in
combination with Output Option R
Ex d IIB + H
2
T 4 (-40
º
C
≤
Ta
≤
70
º
C)Gb
Ex tb IIIC IP65
T135
º
C (-40
º
C
≤
Ta
≤
70
º
C)Db
II 2GD IP65
for Electrical input option H in combination with Electrical
Output option R
Installation
Tools Required: 8mm deep metric socket.
Torque wrench
Adjustable or 1.125” wrench (process
connections)
CAUTION: Do not exceed the maximum rated working
pressure stated on the ratings plate.
CAUTION: Always use a wrench (1.125”) on the
switch’s process connections to keep them
in place while loosening and tightening
customer supplied process fittings.
WARNING: Verify media compatibility with all wetted
parts. Range spring is manufactured from
316SS. Media incompatibility with the
spring or the body of the gauge can result in
an ignition hazard due to corrosion.
WARNING: Use pressure limiting devices to limit
pressure spikes below the proof pressure of
the gauge / switch.
Locate unit where temperatures will be within the limits of the
device hazardous’ locations ratings.
On liquid service the instrument should be mounted
below
the process connections to facilitate self bleeding. On
gas service it should be located
above
the process
connections to promote self-draining. If the process contains
particulates, a “pigtail” loop or drop leg (manometer “U-tube”
configuration) in the tubing will minimize the possibility of it
migrating into the instrument. An optional pipe mounting kit is
available for mounting the gauge to a 2” vertical or horizontal
pipe.
A provision for special mounting is provided on the back of
the gauge.
Connect process piping or tubing to the pressure ports
stamped High and Low on the gauge body. Connections are
either ¼” FNPT or ½” FNPT dependent upon the option
selected when the order was placed.
Reverse pressure will not damage the instrument, however
the switch and indicator (if supplied) will not function properly.
CAUTION: Use cable suitable for the specified
temperature class. Maximum internal cable
entry temperature rise is 15
º
C – Cabling to
be suitable.
WARNING: Electrical connection shall be made with a
cable entry or stopping box certified for use
for the desired hazardous location, certified
for condition of use, and correctly installed.
The cable entry device and any thread
adaptor shall be suitable for the equipment,
the cable, and the conditions of use, and
shall be certified as equipment (Not an EC
component) under the EC Type Examination
Certificate to directive 94/9/EC.
WARNING: When used in an explosive dust
atmosphere, the cable entry device and
thread adaptor shall maintain the ingress
protection of the enclosure.
WARNING: During maintenance do not disconnect from
external earth conductor until all power
generation systems have been turned off.
WARNING: In Hazardous Locations remove power from
the unit before removing the cover.
WARNING: Do not touch the surface of the printed
circuit board if the unit is powered. High
Voltage may be present.
Remove the cover by using an 8mm hex driver to loosen the
bolts from the underside of the gauge body. (see previous
cautions and warnings). The bolts are captive in the body of
the gauge. A deep metric socket is recommended in order to
clear an interference near the bezel of the gauge. (0.48
diameter min 1” long).
Connections to the terminal strip are identified in the following
sections. The terminal strip is compatible for wire ranges
from 12-22 AWG ( 3.3 - .32 mm
2
). Optionally, each
connection can be field wired with multiple wires connected
to one contact. You may connect two (2) 22 – 16 AWG (0.33
-1.3 mm
2
) wires into one connection. Recommended screw
torque is 6 in. lbs. (0.113 newton-meter) to tighten the
terminal strip screw.
Each Assembly is provided with strain relief clamps. Use
these clamps to provide strain relief when field wiring the
instrument.
For the non-gasketed assembly, clean both mating metal
surfaces prior to re-assembly (see previous cautions and
warnings). A small application of a suitable, non-hardening
grease may be applied to the mating metal surfaces.
Replace cover making sure there are no wires pinched
between the cover and the gauge body. Re-tighten the
screws within the range of 60 to 75 in-lbs.
