Series DM-2000 Differential Pressure Transmitter
Specifications - Installation and Operating Instructions
Bulletin E-43-DM
The
Dwyer Series DM-2000 Differential Pressure Transmitter
senses the pressure
of air and compatible gases and sends a standard 4-20 mA output signal. The DM-
2000 housing is specifically designed to mount in the same diameter cutout as a
standard Magnehelic
®
differential gage. A wide range of models are available factory
calibrated to specific ranges.
Pressure connections are inherent to the glass filled plastic molded housing making
installation quick and easy. Digital push-button zero simplifies calibration over typical
turn-potentiometers. Single push button allows field selection of 5 engineering units
(LCD models only). An optional 3.5 digit LCD shows process and engineering.
Accessories
Mounting Lugs
6-20 x 2˝ Screws - 3
6-19 x 1/2˝ Screws - 3
INSTALLATION
1. Location
Select a clean, dry mounting location free from excess vibration where the
temperature will remain between 20 and 120˚F (-6.7 and 48.9˚C). Distance from the
receiver is limited only by total loop resistance. See Electrical Connections on next
page. The tubing supplying pressure to the instrument can be practically any length
required, but long lengths will increase response time slightly.
2. Position
A vertical position required. That is the position in which all standard models are
spanned and zeroed at the factory.
Pressure Connections
Two integral tubing connections are provided on the side of the gage. They are sized
to fit 1/8˝ (3.12 mm) I.D. tubing. Be sure the pressure rating of the tubing exceeds that
of the operating ranges.
Note:
The tubing connections on the back of the gage are not to be used as process
connections.
3. Mounting
Panel - Provide a 4-9/16˝ diameter opening in panel. Insert gage and secure in place
with provided screws and adapters.
Surface - Provide three 3/16˝ diameter holes in panel on a 4-1/8˝ diameter bolt circle.
Cut opening for terminal block as shown in diagram to right.
SPECIFICATIONS
Service:
Air and non-combustible, compatible gases.
Wetted Materials:
Consult Factory.
Accuracy:
±1% F.S. at 70°F.
Stability:
±1% F.S./yr.
Temperature Limits:
20 to 120°F (-6.67 to 48.9°C).
Pressure Limits:
10 psig (0.69 bar).
Thermal Effect:
±0.055% F.S./°F (0.099% F.S./°C).
Power Requirements:
10-35 VDC (2 wire).
Output Signal:
4 to 20 mA.
Zero and Span Adjustments:
Digital push-button zero and span.
Loop Resistance:
DC: 0-1250 ohms maximum.
Current Consumption:
DC: 38 mA maximum.
Electrical Connections:
Screw-type terminal block.
Process Connections:
1/8˝ I.D. tubing.
Mounting Orientation:
Vertical.
Weight:
4.8 oz (136 g).
HIGH PRESSURE PORT
1-1/4
[31.75]
7/16
[11.11]
17/32
[13.50]
1-11/16
[42.86]
5/32
[3.97]
ø4-3/4
[120.65]
LOW PRESSURE PORT
1
(25.40)
11/16
(17.46)
65.000°
(3) HOLES FOR #6 SCREW
EQUALLY SPACED ON
4-1/8 (104.78) B.C.
1-1/2
(38.10)
1
(25.40)
11/16
(17.46)
65.000°
(3) HOLES FOR #6 SCREW
EQUALLY SPACED ON
4-1/8 (104.78) B.C.
1-1/2
(38.10)
Surface
Panel
®
DWYER INSTRUMENTS, INC.
P.O. BOX 373 • MICHIGAN CITY, INDIANA 46360, U.S.A.
Phone: 219/879-8000
Fax: 219/872-9057
www.dwyer-inst.com
e-mail: [email protected]
