Dwyer 634ES - Manual

The Series 634ES Pressure Transmitter senses a single air, compati-
ble gas or liquid pressure and converts it into a standard 4-20 mA output
signal. Ranges are available from 0-10 through 0-6000 psi. All models
are field adjustable so any range within these limits can be achieved by
recalibration using the easily accessible span and zero potentiometers.
Positive pressure can be measured within an accuracy of ±0.5% of span.
The Series 634ES uses an isolated piezoresistive pressure sensor to
produce a resistance change across a wheatstone bridge. The signal is
conditioned and converted into a 4-20 mA output signal.
For applications requiring direct pressure or percent of full span read-
ings, the optional A-701 digital readout makes an ideal companion
device, providing a bright .6” high, 3-1/2˝ digit LED and supplying power
to the Series 634ES Transmitter.
PHYSICAL DATA
GENERAL
Maximum Pressure: See chart on this page.
Wetted Parts: 316, 316L SS.
Housing: Designed to meet NEMA-4X.
ELECTRICAL
Power Supply: 12.3-35 VDC-2 wire.
Output Signal: 4-20 mA DC (limited at 38 mA DC).
Loop Resistance: 0 - 1100 ohms from 12.3 to 35 VDC.
Current Consumption: DC: 38 mA max.
MATERIALS
Housing: Cast aluminum; textured gray polyurethane finish.
Pressure Connection: Stainless Steel.
MECHANICAL
Weight: 1 lb, 12 oz (.8 kg).
Span and Zero Adjustments: Protected potentiometers, located in
auxiliary housing.
Pressure Connection: 1/4˝ female NPT x 1/2˝ male NPT.
PERFORMANCE AT 70°F (21.1°C)
Zero Output: 4 mA DC.
Full Span: 16 mA DC.
Accuracy: ±0.5% of span.
Warm-up Time: 10 minutes.
STABILITY/ENVIRONMENTAL
Operating Temperature: 20 to 120˚F (- 6.7 to 48.9˚C).
Thermal Errors: ± 0.02%/˚F typical.
Stability: 1% F.S./yr.
STANDARD ACCESSORIES
(3) “Z” mounting brackets.
(3) 10-32 x 4˝ RH machine screws.
Series 634ES Pressure Transmitter
Specifications - Installation and Operating Instructions
Bulletin E-69ES
Model
634ES-0
634ES-1
634ES-2
634ES-3
634ES-4
634ES-5
634ES-6
634ES-7
634ES-8
634ES-9 As Stocked
10 (.69)
30 (2.07)
50 (3.45)
100 (6.9)
200 (13.8)
300 (20.7)
500 (34.5)
1000 (69)
2000 (138)
4000 (276) Min. Range
10 (.69)
20 (1.38)
40 (2.76)
60 (4.14)
100 (6.9)
250 (17.2)
350 (24.1)
600 (41.4)
1250 (86)
2500 (172) Max. Range
20 (1.38)
40 (2.76)
60 (4.14)
120 (8.3)
250 (17.2)
350 (24.1)
600 (41.4)
1250 (86)
2500 (172)
6000 (414) Max. Pressure
30 (2.07)
60 (4.14)
100 (6.9)
200 (13.8)
400 (27.6)
500 (34.5)
1000 (69)
2000 (138)
4000 (276)
7500 (517)
2-1/2 [63.50]
TYP
1-11/16
[42.86]
5-5/16
[134.94]
1/4NPT
1/2NPT
2-7/8 [73.03]
1/16 [1.59]
25/32 [19.84]
03-3/8 [85.73]
3/4 NPT
1-9/16
[39.69]
(3) #10-32 x 1/4 [6.35] DP HOLES
EQUALLY SPACED ON A 2-1/2 [63.50] B.C.
Series 634ES Models and Ranges in PSI (bar)
R
L max
=
Vps - 12.3V
20 mA
DWYER INSTRUMENTS, INC. Phone: 219/879-8000 www.dwyer-inst.com
P.O. Box 373 • Michigan City, IN 46361 U.S.A. Fax: 219/872-9057 e-mail: [email protected]
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