Bulletin 06S - Dwyer Instruments, Inc.

Bulletin 06S - Dwyer Instruments, Inc.
Bulletin E-57G
Series 1950G – Integral Explosion-Proof Pressure Switches
Specifications - Installation and Operating Instructions
Set Point
Adjustment
Screw
External
Ground Screw
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
0518
II 2G Ex d IIB + H2 T6 Gb
EC-Type Certificate Number: KEMA 03ATEX2402 X
ATEX Standards:
EN60079-0: 2009
EN60079-1: 2007
IECEx Certified for:
Ex d IIB + H2 T6 Gb (-40°C < Ta < +60°C)
IECEx Certificate of Conformity:
IECEx DEK 11.0092X
IECEx Standards:
IEC 60079-0: 2007
IEC 60079-1: 2007
Model 1950G Switches:
Operating ranges and deadbands
Captive
Screw
The Model 1950G Explosion-Proof Switch combines the best features
of the popular Series 1900 Pressure Switch with a compact explosionproof 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 atmospheres and Directive
94/9/EC (ATEX) Compliant for
II 2G Ex d IIB + H2 T6 Gb. IECEx
and KC certified Ex d IIB + H2 T6 Gb (-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 provided 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” suffix are not Directive 94/9/EC (ATEX)
compliant. These units are not intended for use in potentially explosive
atmospheres in the EU. These units may be CE marked for other
Directives of the EU.
*GR. A is
Operating
Range
Inches, W.C.
0.07 to 0.15
0.15 to 0.5
0.4 to 1.6
1.4 to 5.5
3.0 to 11.0
4.0 to 20.0
Approximate
Dead Band
At Min.
At Max.
Set Point
Set Point
0.04
0.06
0.06
0.11
0.11
0.29
0.4
0.9
0.9
1.8
1.2
3.0
* 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
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).
Only.
DWYER INSTRUMENTS, INC.
P.O. Box 373 • Michigan City, IN 46360, U.S.A.
Phone: 219/879-8000
Fax: 219/872-9057
www.dwyer-inst.com
e-mail: [email protected]
3-1/2
[88.90]
4-7/8
[123.8]
5-7/16
[138.1]
CAPTIVE
SCREW
1/2˝ NPT
ELECTRICAL
CONDUIT
CONNECTION
1/8˝ NPT HIGH
PRESSURE PORT
1/8˝ NPT LOW
PRESSURE PORT
13/32
[10.312]
1-11/16
[42.86]
Fig. A
+
1-17/32
[38.89]
INSTALLATION
1. Select a location free from excess vibration and corrosive
atmospheres where temperatures will be within the limits noted under
Physical Data on page 1. Switch may be installed outdoors or in areas
where the hazard of explosion exists. See page 1 for specific types of
hazardous service.
Fig. B
For units supplied with both internal and external bonding terminals, the
ground screw inside the housing must be used to ground the control. The
enternal bonding screw is for supplementary bonding when allowed or
required by local code. When external bonding conductor is required,
conductor must be wrapped a minimum of 180° about the external
bonding screw. See below.
2. Mount standard switches with the diaphragm in a vertical plane and
with switch lettering and nameplate in an upright position. Some switches
are position sensitive and may not reset properly unless they are
mounted with the diaphragm vertical.
B. Pressure only (above atmospheric pressure) - connect tube from
source of pressure to high pressure port. The low pressure port is left
open to atmosphere.
C. Vacuum only (below atmospheric pressure) - connect tube from
source of vacuum to low pressure port. The high pressure port is left
open to atmosphere.
4. To make electrical connections, remove the three hex head screws
from the cover and after loosening the fourth captive screw, swing the
cover aside. Electrical connections to the standard single pole, double
throw relay and AC supply voltage connections to the unit, are provided
by means of terminals marked “COM”, “NO”, “NC”, “~” and “~” (See Fig.
A). Electrical connections to the standard single pole, double throw relay
and DC supply voltage connections to the unit, are provided by means of
terminals marked “COM”, “NO”, “NC”, “+” and “-” (See Fig. B.). The
normally open contacts close and the normally closed contacts open
when pressure increases beyond the setpoint. Switch loads for standard
models should not exceed the maximum specified current ratings as
stated on page 1. For ATEX, IECEx compliance, cables and cable glands
suitable for temperature of at least 95°C shall be used. The cable entry
device shall be of certified flameproof type, suitable for the conditions of
use and be correctly installed. Refer to Certificate No.: IECEx DEK
11.0092X for conditions of safe use for IECEx Compliant units. Switch
capabilities decrease with an increase in ambient temperature, load
inductance, or cycling rate.
DWYER INSTRUMENTS, INC.
P.O. Box 373 • Michigan City, IN 46360, U.S.A.
CONDUCTOR
SCREW
3. Connect switch to source of pressure, vacuum or differential pressure.
Metal tubing with 1/4˝ O.D. is recommended, but any tubing which will
not restrict the air flow can be used. Connect to the two 1/8˝ female NPT
pressure ports as noted below.
A. Differential pressures - connect pipes or tubes from source of
greater pressure to high pressure port marked HIGH PRESS, and
from source of lower pressure to low pressure port marked LOW
PRESS.
-
CLAMP PLATE
CLAMP
FRONT VIEW DETAIL
ADJUSTMENT
To change setpoint:
A. Remove the plastic cap and turn the slotted Adjustment Screw at
the top of the housing clockwise to raise the setpoint pressure and
counter-clockwise to lower the setpoint. After calibration, replace the
plastic cap and re-check the setpoint.
B. The recommended procedure for calibrating or checking
calibration is to use a “T” assembly with three rubber tubing leads, all
as short as possible and the entire assembly offering minimum flow
restriction. Run one lead to the pressure switch, another to a
manometer of known accuracy and appropriate range, and apply
pressure through the third tube. Make final approach to the setpoint
very slowly. Note that manometer and pressure switch will have
different response times due to different internal volumes, lengths of
tubing, fluid drainage, etc. Be certain the switch is checked in the
position it will assume in use, (i.e. with diaphragm in a vertical plane)
and switch lettering and Dwyer nameplate in an upright position.
C. For highly critical applications check the setpoint adjustment and if
necessary, reset it as noted in step A.
MAINTENANCE
The moving parts of these switches need no maintenance or lubrication.
The only adjustment is that of the setpoint. Care should be taken to keep
the switch reasonably clean. Periodically the vent drain plug should be
rotated then returned to its original position. This will dislodge deposits
which could accumulate in applications where there is excessive
condensation within the switch. Repairs to be conducted by Dwyer
Instruments, Inc. Cover bolts are Class 10.9 35 mm long.
Phone: 219/879-8000
Fax: 219/872-9057
www.dwyer-inst.com
e-mail: [email protected]
Bulletin E-57G
DWYER INSTRUMENTS, INC.
P.O. Box 373 • Michigan City, IN 46360, U.S.A.
Phone: 219/879-8000
Fax: 219/872-9057
www.dwyer-inst.com
e-mail: [email protected]
3-1/2
[88.90]
123, 8
+
9, 525
36, 51
DWYER INSTRUMENTS, INC.
P.O. Box 373 • Michigan City, IN 46360, U.S.A.
-
ABB.B
KLEMME PLATTE
KLEMME
DETAILLIERTE FRONTANSICHT
Phone: 219/879-8000
Fax: 219/872-9057
www.dwyer-inst.com
e-mail: inf[email protected]
Bulletin E-57G
Vis de masse
externe
Orifice de
purge
DWYER INSTRUMENTS, INC.
P.O. Box 373 • Michigan City, IN 46360, U.S.A.
Hystériésis approximatif
Seuil mini
0.04 in.wc
(10 Pa)
0.06 in.wc
(15 Pa)
0.11 in.wc
(28 Pa)
0.4 in.wc
(100 Pa)
0.9 in.wc
(224 Pa)
1.2 in.wc
(298 Pa)
Seuil maxi
0.06 in.wc
(15 Pa)
0.11 in.wc
(28 Pa)
0.29 in.wc
(72 Pa)
0.9 in.wc
(224 Pa)
1.8 in.wc
(447 Pa)
3.0 in.wc
(750 Pa)
Phone: 219/879-8000
Fax: 219/872-9057
www.dwyer-inst.com
e-mail: [email protected]
3-1/2
[88.90]
4-7/8
[123.8]
5-7/16
[138.1]
1/8˝ NPTf
Prise haute
Pression
Fig. A
1-11/16
[42.86]
1/8˝ NPTf
Prise basse
Pression
Orifice de purge
13/32
[10.312]
1-17/32
[38.89]
+
DWYER INSTRUMENTS, INC.
P.O. Box 373 • Michigan City, IN 46360, U.S.A.
-
Fig. B
CONDUCTEURS
VIS
PINCE PLAQUE
PINCE
VUE DE FACE DÉTAILLÉE
Phone: 219/879-8000
Fax: 219/872-9057
www.dwyer-inst.com
e-mail: [email protected]
Boletin E-57G
External
Ground Screw
Captive
Screw
solamente.
DWYER INSTRUMENTS, INC.
P.O. Box 373 • Michigan City, IN 46360, U.S.A.
Phone: 219/879-8000
Fax: 219/872-9057
www.dwyer-inst.com
e-mail: [email protected]
3-1/2
[88.90]
4-7/8
[123.8]
5-7/16
[138.1]
Fig. A
CAPTIVE
SCREW
1/2˝ NPT
ELECTRICAL
CONDUIT
CONNECTION
1/8˝ NPT HIGH
PRESSURE PORT
1/8˝ NPT LOW
PRESSURE PORT
13/32
[10.312]
1-11/16
[42.86]
1-17/32
[38.89]
+
Dimensiones del interruptor 1950G
Fig. B
DWYER INSTRUMENTS, INC.
P.O. Box 373 • Michigan City, IN 46360, U.S.A.
-
CONDUCTOR
ABRAZADERA PLACA
ABRAZADERA
DETALLE DE LA VISTA LATERAL
DETALLE DE LA VISTA FRONTAL
Printed in U.S.A. 9/14
Phone: 219/879-8000
Fax: 219/872-9057
www.dwyer-inst.com
e-mail: [email protected]
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