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EPLACING ORIFICE:
T
his can be accomplished without removing the unit from its mounting or plumbing.
1. Turn off supply pressure and unscrew the brass orifice assembly located on the side of the housing with the gauge
port.
NOTE: Small sealing o-ring may remain inside of the housing. If it does, remove it with a paper clip or some other small
probe. The replacement assembly will contain this o-ring.
2
. Install the new orifice assembly making sure the o-ring is seated on the end of the screw.
CLEANING INTERNAL SUPPLY VALVE:
1. Turn off the supply pressure.
2. Use a 9/16" socket or wrench to unscrew the brass plug in the bottom of the transducer.
NOTE: Take care not to lose the supply valve spring which is retained by the bottom plug.
3. Clean out any dirt or debris and reassemble, making sure the stem of the supply valve is nested in the supply valve
spring.
AGENCY APPROVALS, SPECIAL NOTES, AND CAUTIONS
INTRINSIC SAFETY
All 510 and 511 Series transducers are rated intrinsically safe by both FM and CSA for:
CLASS I, DIVISION 1, GROUPS A,B,C,D HAZARDOUS LOCATIONS.
Proper FM-approved intrinsically-safe wiring requires external FACTORY MUTUAL RESEARCH CORPORATION ENTITY-
APPROVED SINGLE-CHANNEL barriers to be selected, based upon MAXIMUM ENTITY PARAMETERS of 510 and 511 Series
transducers:
ENTITY PARAMETERS:
Vmax = 28 V, Imax = 150 mA, Ci = 0.22uF, Li = 0 mH.
Voc and Isc of a barrier shall not exceed Vmax and Imax of the transducer.
(Li + Lwiring) and (Ci + Cwiring) shall not exceed La and Ca of a barrier.
NOTICE: For proper FM and CSA approved intrinsically-safe wiring, request Drawing Number 990-439-000 from the
Factory.
NONINCENDIVE
All 510 and 511 Series transducers are approved as NONINCENDIVE by FM and approved as suitable by CSA for:
CLASS I, DIVISION 2, GROUP A, B, C, D HAZARDOUS LOCATIONS.
A barrier is not necessary when these transducers are in these locations.
ENCLOSURES
Compliance with NEMA 4X and CSA ENC4 enclosure ratings require that the screw-on cover has the O-ring installed. In case
of a need for replacement parts, see TABLE 3.
M
-4109/1104 IP510, EP510, IP511, EP511 SERIES
A
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