Dwyer 19050G Serie Especificaciones Técnicas – Instrucciones De Instalación Y Operación

Set Point Adjustment
Screw
1/2˝ female
NPT
Electrical
Conduit
Connection
Vent Drain
Plug
The Model 1950G Explosion-Proof Switch combines
the best features of the popular Dwyer Series 1900
Pressure Switch with a compact explosion-proof housing.
This unit is UL, CSA, FM listed for use in Class I, Groups A*,
B, C, D, Class II, Groups E, F, & G and Class III atmos-
pheres and Directive 94/9/EC (ATEX) Compliant for
II 2G Ex d IIB + H T6. IECEx certified Ex d IIB + H
2
40°C < Ta < + 60°C) units are available. It is also totally rain-
tight for outdoor installations. Six models allow set-points
from 0.07 to 20 inches W.C. ( 1.78 mm to 508.0 mm W.C.).
Easy access to the SPDT relay for electrical hook-up is pro-
vided by removing the top plate of the aluminum housing.
A captive screw allows the cover to swing aside while
remaining attached to the unit. Adjustment to the set point
of the switch can be made without disassembly of the
housing. The unit is very compact, about half the weight
and bulk of equivalent conventional explosion-proof
switches.
Attention: Units with the "NA" and "IEC" suffixes are not Directive 94/9/EC
(ATEX) compliant. These units are not intended for use in potentially explo-
sive atmospheres in the EU. These units may be CE marked for other
Directives of the EU.
*GR. A is Only.
DWYER INSTRUMENTS, INC.
P.O. Box 373 • Michigan City, IN 46361-0373, U.S.A.
Series 1950G – Integral Explosion-Proof Pressure Switches
Specifications - Installation and Operating Instructions
External
Ground Screw
Captive
Screw
T6 (-
2
UL, CSA, FM Listed For
CL, I GR. A*, B, C, D - CL. II GR. E, F, G - CL. III
Directive 94/9/EC (ATEX) Compliant For
0344 II 2G Ex d IIB + H
EC-Type Certificate Number:
ATEX Standards:
EN60079-0: 2006
EN60079-1: 2007
IECEx Certified for:
Ex d IIB + H IP54 T6 (-40°C < Ta < +60°C)
2
IECEx Certificate of Conformity:
IECEx TSA 08.0020X
IECEx Standards:
IEC 60079-0: 2004
IEC 60079-1: 2003
Model 1950G Switches:
Operating ranges and deadbands
To order Operating
specify Model Range
Number* Inches, W.C.
1950G-00-B-__
0.07 to 0.15
1950G-0-B-__
0.15 to 0.5
1950G-1-B-__
0.4 to 1.6
1950G-5-B-__
1.4 to 5.5
1950G-10-B-__
3.0 to 11.0
1950G-20-B-__
4.0 to 20.0
* Specify either 24 for 24 VDC, 120 for 120 VAC or 240
for 240 VAC when ordering. Example: 1950G-00-B-120
* Add "NA" suffix for models with UL, CSA, and FM approvals only.
Example: 1950G-00-B-120-NA
* Add "IEC" suffix for models which are IECEx certified. Units with
"IEC" suffix feature no other approvals.
SPECIFICATIONS
Service: Air and compatible combustible gases.
Wetted Materials: Contact Factory.
Temperature Limits: 0 to 140°F (-17 to 60°C). Note: Set point drift
may occur with ambient temperature changes.
Pressure Limits: 45˝ w.c. (11.2 kPa) continuous; 10 psig (68.95
kPa) surge.
Enclosure Rating: IP54, NEMA 3, 7 and 9.
Switch Type: 1 Form C relay (SPDT).
Electrical Rating: 10A, 120/240 VAC, 28 VDC. Resistive 50mA,
125 VDC.
Power Requirements: 24 VDC ±10%. 120 or 240 VAC ±10%
optional.
Electrical Connections: Internal Terminal Block.
Process Connections: 1/8˝ female NPT.
Mounting Orientation: Diaphragm in vertical position. Consult
factory for other position orientations.
Set Point Adjustment: Screw type on top of housing.
Weight: 2 lb, 15.7 oz (1.35 kg).
Phone: 219/879-8000
Fax: 219/872-9057
Bulletin E-57G
T6
2
K
EMA 03ATEX2402 X
Approximate
Dead Band
At Min. At Max.
Set Point
Set Point
0.06
0.04
0.11
0.06
0.29
0.11
0.9
0.4
1.8
0.9
3.0
1.2
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