Dwyer Instruments DM DigiMag Series Installation And Operating Instructions

Series DM DigiMag
Specifications - Installation and Operating Instructions
The Series DM DigiMag Differential Pressure Transmitter senses the pressure
®
of air and compatible gases and sends a standard 4-20 mA output signal. The DM
housing is specifically designed to mount in the same diameter cutout as a standard
Magnehelic gage. A wide range of models are available factory calibrated to specific
®
ranges. The polycarbonate molded housing features integral pressure connections,
which reduces installation time. Digital push-button zero and span simplify calibration
over typical turn-potentiometers. A single push-button allows field selection of 4 to 6
engineering units, depending on the range.
BENEFITS/FEATURES
• Reduced installation time through zero and span controls that provides quick and
easy calibration
• Fast and easy setup and calibration with push-button zero and span controls
• Immediate corrective action can be taken by local alerts via the easy-to-read LCD
display
• Reduces upgrade installation costs and simplifies field upgrade from a Magnehelic
gage, as both use the same diameter cutout
APPLICATIONS
• Differential pressure across filters
• Fan control
• Static pressures in ducts or buildings
• Room pressurization monitoring
INSTALLATION
Location:
Select a clean, dry mounting location free from excess vibration where the temperature
will remain between -4 to 158°F (-20 to 70°C). Distance from the receiver is limited only
by total loop resistance. See Electrical Connections on the next page. The tubing
supplying pressure to the instrument can be practically any length required, but long
lengths will increase the response time slightly.
Position:
Transmitter pressure accuracy is not affected by orientation. If choosing a non-vertical
installation, ZERO the unit to remove any offset due to gravity.
Pressure Connections:
Two integral tubing connections are provided on the side of the
NOTICE
gage. They are sized to fit 1/8˝, 3/16˝, 1/4˝, 5 mm, and 6 mm ID
flexible tubing. Be sure the pressure rating of the tubing exceeds that of the operating
ranges.
DWYER INSTRUMENTS, INC.
P.O. BOX 373 • MICHIGAN CITY, INDIANA 46360, U.S.A.
Differential Pressure Transmitter
®
HIGH PRESSURE PORT
1 [25.40]
LOW PRESSURE PORT
1/2 [12.70]
SPECIFICATIONS
Service: Air and non-combustible, compatible gases.
Wetted Materials: Consult factory.
Housing Material: Polycarbonate.
Accuracy: ±1% FSO for all ranges except 0.25 in w.c. @ ±2% FSO, and ranges at
or below ±0.1 in w.c. @ ±4% FSO.
Stability: < ±1% / year FSO.
Pressure Limits: Ranges > 1 in w.c.: 6 psi max operation, 6 psi burst; Ranges ≤ 1
in w.c.: 3.6 psi max operation, 6 psi burst.
Temperature Limits: -4 to 158°F (-20 to 70°C).
Thermal Effect: 0.036% FS/°C (0.02% FS/°F).
Power Requirements: 10-35 VDC (2-wire).
Output Signal: 4-20 mA (2-wire).
Zero and Span Adjustments: Push-button.
Loop Resistance: 0 to 1250 Ω max.
®
Current Consumption: 21 mA max.
Electrical Connections: Screw-type terminals.
Process Connections: Male ports on side for 1/8˝, 3/16˝, 1/4˝, 5 mm, 6 mm ID
flexible tubing.
Enclosure Rating: NEMA 4X (IP66).
Mounting Orientation: Not sensitive to position.
Size: 5˝ OD (127 mm) x 1.9˝ (48 mm) deep.
Weight: 7.04 oz (200 g).
Agency Approvals: CE.
Phone: 219-879-8000
Fax: 219-872-9057
Bulletin P-DMT
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e-mail: info@dwyermail.com