IMP12-16
www.ueonline.com
1
PRIOR TO INSTALLATION, CHECK THE WETTED PARTS MATERIAL FOR
COMPATIBILITY TO THE PROCESS MEDIA.
THE DUAL SEAL DEVICE METHOD OF PRIMARY SEAL FAILURE
ANNUNCIATION IS VISIBLE LEAKAGE FROM THE ENCLOSURE.
DEPENDING UPON MEDIA SENSED, ADDITIONAL METHODS OF LEAK
DETECTION MAY BE REQUIRED.
PROOF PRESSURE* LIMITS STATED WITHIN THE LITERATURE
AND PRINTED ONTO THE PRODUCT HOUSING MUST NEVER
BE EXCEEDED, EVEN BY SURGES IN THE SYSTEM. OCCASIONAL
OPERATION OF THE PRODUCT UP TO PROOF PRESSURE IS
ACCEPTABLE (E.G., START-UP, TESTING). CONTINUOUS OPERATION SHOULD
NOT EXCEED THE DESIGNATED OVER RANGE PRESSURE** OR WORKING
PRESSURE RANGE***.
*Proof Pressure - the maximum pressure to which a pressure sensor may be
occasionally subjected, which causes no permanent damage (e.g., start-up
testing). The product may require set-point adjustment after reaching proof
pressure.
**Over Range Pressure - the pressure value to which a pressure sensor may be
continuously subjected without causing damage and while maintaining set
point repeatability.
***Working Pressure Range - the pressure range within which two opposing
sensors can be safely operated while maintaining set point repeatability.
THE EPOXY RESIN SHALL NOT BE SUBJECTED TO A TEMPERATURE
GREATER THAN 125°C.
THIS PRODUCT DOES NOT HAVE ANY FIELD REPLACEABLE
PARTS. ANY SUBSTITUTION OF COMPONENTS WILL INVALIDATE
THIRD-PARTY ISSUED APPROVALS AND CERTIFICATIONS, AND
MAY IMPAIR SUITABILITY FOR CLASS I, DIVISION 1 LOCATION.
The 12 Series switch utilizes a diaphragm or a piston sensor to
detect a pressure change. The response, at a predetermined set
point, actuates a SPDT or DPDT snap-acting switch, converting a
pressure signal into an electrical signal. Control set point may be
varied by turning the internal slotted adjustment screw according to
procedures outlined in Part II-Adjustments.
12 Series
Explosion-Proof, Pressure,
Vacuum, and Differential
Pressure Switches
U N I T E D E L E C T R I C
C O N T R O L S
Installation and Maintenance
Instructions
IMP12-16
Please read all instructional literature carefully and thoroughly before starting. Refer to the final page for the listing of Recommended
Practices, Liabilities and Warranties.
GENERAL
MISUSE OF THIS PRODUCT MAY CAUSE EXPLOSION AND PERSONAL
INJURY. THESE INSTRUCTIONS MUST BE THOROUGHLY READ AND
UNDERSTOOD BEFORE PRODUCT IS INSTALLED.
12 SERIES PRESSURE-OPERATED SWITCH FOR USE IN CLASS I, GROUPS
A, B, C AND D; CLASS II, GROUPS E, F AND G; CLASS III HAZARDOUS
LOCATIONS. ENCLOSURE TYPE 4X, IP66. AMBIENT TEMPERATURE
RANGE: -50°C (-58°F) TO 71°C (160°F).
THIS PRODUCT IS ATEX AND IECEX CERTIFIED WITH MARKINGS LISTED
BELOW:
0539 DEMKO 08 ATEX 0717128x
II 2 G Ex db IIC T6 Gb
II 2 D Ex tb IIIC T85°C Db
IP66
-50°C < Tamb. < +80°C
IECEx UL 14.0072X
Ex db IIC T6 Gb
Ex tb IIIC T85°C Db
IP66
-50°C < Tamb. < +80°C
UE declarations and third-party issued Agency certifications are available
for download at www.ueonline.com. EACH CERTIFICATE INCLUDES LIST OF
STANDARDS THAT MUST BE FOLLOWED.
ATEX CERTIFICATE SPECIFIC CONDITIONS OF USE:
THE WIRING TO THE TEMPERATURE OR PRESSURE SWITCH MUST ONLY
BE CONNECTED IN A SAFE AREA OR BY AN APPROVED TERMINAL BOX
CERTIFIED TO EN 60079-0:2018, EN 60079-1:2014, AND EN 60079-31:2014 FOR
HAZARDOUS LOCATIONS. THE EPOXY RESIN SHALL NOT BE SUBJECTED TO A
TEMPERATURE GREATER THAN 125°C. BY THE INSTALLATION THE WIRES SHALL
BE PROTECTED AGAINST MECHANICAL DAMAGE E.G. BY USE OF CONDUIT.
OPTION M515 WITH DIN CONNECTOR IS NOT COVERED BY THIS CERTIFICATE.
AN EXTERNAL EARTH SCREW IS TO BE USED (M460 OPTION) IF METAL CONDUIT
IS NOT USED. ELECTRICAL CONDUIT FITTING THREADED CONNECTION: M20 X
1.5, 7 THREADS MINIMUM ENGAGEMENT.
IEC CERTIFICATE SPECIFIC CONDITIONS OF USE:
THE WIRING TO THE TEMPERATURE OR PRESSURE SWITCH MUST ONLY
BE CONNECTED IN A SAFE AREA OR BY AN APPROVED TERMINAL
BOX CERTIFIED TO IEC 60079-0, SEVENTH EDITION, IEC 60079-1,
SEVENTH EDITION, AND IEC 60079-31, SECOND EDITION FOR HAZARDOUS
LOCATIONS. THE EPOXY RESIN SHALL NOT BE SUBJECTED TO A TEMPERATURE
GREATER THAN 125°C. BY THE INSTALLATION THE WIRES SHALL BE PROTECTED
AGAINST MECHANICAL DAMAGE E.G. BY USE OF CONDUIT. OPTION M515
WITH DIN CONNECTOR IS NOT COVERED BY THIS CERTIFICATE. AN EXTERNAL
EARTH SCREW IS TO BE USED (M460 OPTION) IF METAL CONDUIT IS NOT
USED. ELECTRICAL CONDUIT FITTING THREADED CONNECTION: M20 X 1.5, 7
THREADS MINIMUM ENGAGEMENT.
DUAL SEAL
CERTIFIED
DO NOT TURN
switch
housing
MOUNT VIA
pressure
connection
Figure 1
SIL2
Certified