User Manual

Installation, Operating and
Maintenance Instructions for
Series 387 Analogue Transmitter
002522-387-G
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DESCRIPTION
Series 387 Transmitters/transducers employ strain gauge pressure
sensing and a precision amplifier providing a 4 to 20 mA current output
capable of being used in control and indicating loops without further
amplification.
Each instrument is coded to provide a complete description of the
facilities offered.
IMPORTANT INFORMATION
Delta Controls cannot guarantee performance, standards compliance,
or accept liability for any eventuality arising if the instrument is installed
or operated in any way contrary to the guidance contained herein.
ENCLOSURES AND CERTIFICATION
All Models are enclosed in an investment cast, 316 Stainless Steel
enclosure, giving environmental protection to IP66 (NEMA 4X).
Ensure that the Model chosen is appropriate to the environment and
that codes of practice for the installation of electrical apparatus have
been followed.
4-387 Certified Intrinsically Safe when powered via a suitable Barrier
device or Isolator. The unit is rated
Ga Ex ia IIC T4 (Tamb = -20°C to +90°C)
Ga Ex ia IIC T5
Ex iaD 20 T120 (Tamb = -20°C to +90°C)
Ex iaD 20 T90
This model is suitable for use in Zone 0 Hazardous Areas when
installed in accordance with the proper Codes of Practice.
SPECIAL CONDITIONS OF SAFE USE (4-387 only)
1. The transmitter may not be capable of withstanding the
500V insulation test required by clause 6.3.12 of EN
60079-11 and this must be taken into account when
installing the apparatus
2. A conduit/cable gland or an integral cable when fitted to
the transmitter must provide a degree of protection of
at least IP6X
R-387 Explosion-proof/Weather-proof and rated
II 2 GD Ex tD A21 IP6X T85°C
And
II 2 GD Ex tD A21 IP6X T135°C (Tamb = -20°C to +90° C)
This model is suitable for use in Zone 1/21 Hazardous Areas (Gas and
Dust) when installed in accordance with the proper Codes of Practice.
Particular attention should be given to the cable gland or conduit
attachment.
The instrument must be isolated from the power supply before the cover
is removed, and the cover must be screwed fully down (hand right) and
locked with the grub screw before power is restored.
A-387 Weather-proof only. Suitable for outdoor use in all industrial
environments, including offshore.
F-387 Listed by Factory Mutual Research as being suitable for use in
Hazardous areas as follows:
Explosionproof Class I Division 1
Groups B, C & D
Dust Ignitionproof Class II & III Division 1
Groups E, F & G
Intrinsically Safe Class I, II & III Division 1
Groups A, B, C, D, E, F & G
Non-Incendive Class I, II & III Division 2
Groups A, B, C, D, F & G
ELECTRICAL ENTRY AND CONNECTION (Fig 1)
For reasons of Explosion containment, Explosion-proof approval is
confined to ranges 0 to 10 bar (160 psi) and above. Intrinsic Safety
operation are available over the full set of pressure ranges offered.
The instrument is designed for ease of electrical connection combined
with compact overall size, even with 2 mm
2
(16 AWG) solid wire. Cable
inserted through threaded entry clears the terminal block and passes
out through the cover aperture, enabling termination and connection to
be carried out with minimum effort.
Cable to be braid, double-braid, or braid & foil screened.
Cable gland to terminate the cable screen through a 360° connection.
Ideally the gland would be made from the same material as the
instrument housing, 316 stainless steel. The instrument requires an
earth bond to the instrument enclosure.
MAINTENANCE
No maintenance is normally necessary or required on these
instruments. Should the cover be removed for adjustment, ensure that
the O-ring seal is not damaged. Light greasing is recommended.
Maintainance should only be conducted in a dry ambient environment
to prevent water ingress, which can cause damage to sensitive internal
components.
WARRANTY
This instrument is guaranteed against faulty workmanship and material
for a period of one year from the date of delivery. The company
undertakes to repair, free of charge, ex-works any instrument found to
be defective within the specified period provided the instrument has
been used within the specification in accordance with these instructions
and has not been misused in any way. Detailed notice of such defects
and satisfactory proof thereof must be given to the company
immediately after the discovery and the goods have to be returned free
of charge to the company, carefully packed and accompanied by a
detailed failure report.
To comply with health and safety requirements, the instrument must be
clean and safe to handle and accompanied by a formal statement to
that effect duly signed by an authorised officer of the user company.
Any instrument returned without certification will be quarantined and no
action will occur until cleared.
On ranges below 10 bar gauge (160 psi), it is recommended that the
cable incorporates a breather tube to permit pressure equalisation
during changing atmospheric conditions. This is not permitted with Exd
and FM Explosion-proof installations, but as these are limited to higher
pressures, any error introduced will be negligible. A suitable cable
gland must be fitted if the unit is to be wired with flexible or armoured
cable.
For Weather-proof and Intrinsically Safe units, the gland must seal to an
environmental rating not less than that of the instrument (IP66/NEMA
4X). In addition, for Exd and FM Explosion-proof units, it must be of a
type approved for the Zone/Division and Hazards applications, it must
be capable of withstanding a pull of 160 Newtons (36 pounds force).
Two optional threads are offered as standard for attachment of conduit
or gland.