Series 604D Indicating Pressure Transmitter
Specifications - Installation and Operating Instructions
Bulletin E-34
DWYER INSTRUMENTS, INC.
Phone: 219/879-8000
www.dwyer-inst.com
P.O. BOX 373 • MICHIGAN CITY, INDIANA 46361, U.S.A.
Fax: 219/872-9057
e-mail: [email protected]
Lit-By Fax: 888/891-4963
The Dwyer Series 604D Indicating Transmitter
simulta-
neously provides local indication on a compact, easy to
read analog scale while also converting that pressure into a
standard 2, 3 or 4 wire, 4-20 mA signal for ranges as low
as 0-0.5 in. w.c. Positive, negative or differential pressures
can be measured within ±5% of full scale (gage reading) or
±2% of full span output (transmitter signal). The basic
mechanical components of the Series 604D units are simi-
lar to those used in the popular, time-proven Minihelic
®
dif-
ferential pressure gage. However, the Series 604D models
add electrical conditioning and amplification of a resistance
change produced by a silicon strain gage cemented to the
range spring. This resistance change is the result of a slight
flexing which results from spring deflection as pressure is
applied to the diaphragm which is mechanically linked to
the spring.
PHYSICAL DATA
GENERAL
Maximum Pressure:
30 psig (207 kPa) continuous
50 psig (344 kPa) momentary surge.
Media Compatibility:
Air and non-combustible, non-cor-
rosive gases.
Materials:
Mineral and glass filled nylon housing, high
impact acrylic cover, silicone rubber diaphragm.
ELECTRICAL
Power Supply:
10-35 VDC-2,3 or 4 wire
16-26 VAC-4 wire.
Connections:
4 screw terminal block
Cable Gland:
Fits .10 - .25 in (2.5 - 6 mm) O.D. cable.
Output Signal:
4-20 mA DC (limited at 38 mA DC).
Loop Resistance:
DC; 0-1300 ohms
AC; 0-1200 ohms.
Current Consumption:
DC; 38 mA max. AC; 76 mA
max.
Warm-Up:
10 minutes.
PERFORMANCE AT 70°F (21.1°C)
Zero Output:
4 mA DC.
Full Span Output:
20 mA DC.
Accuracy, Gage:
±5% of full scale.
Accuracy, Transmitter:
±2% of full span output
(Includes linearity, hysteresis and repeatability).
Stability:
1% F.S./year.
ENVIRONMENTAL
Operating Temperature:
20-120°F (-6.7° to 49°C)
Thermal Errors:
±1%/50°F
MECHANICAL
Weight:
8 oz. (227 grams)
Span and Zero:
Internally accessible potentiometers
Pressure Connections:
Barbed, for 3/16
″
(4-5 mm) I.D.
tubing.
STANDARD ACCESSORIES
(2) #10 x 1
″
pan head sheet metal screws, (1) .050
″
hex
allen wrench.
Model
Number
604D-0
604D-1
604D-2
604D-3
604D-5
604D-10
604D-20
604D-40
604D-60
604D-100
Ranges, Inches W.C.
0-0.5
0-1.0
0-2.0
0-3.0
0-5.0
0-10
0-20
0-40
0-60
0-100
Minor Divisions
.02
.05
.10
.10
.20
.50
1.0
2.0
2.0
5.0
Series 604D Indicating Transmitter Model & Ranges
