Dwyer 672 - Manual

Bulletin A-30-672
The Series 672 Low Pressure Transducer is a perfect solution to any
application where a very accurate low pressure transducer is necessary.
Using variable capacitance technology, the series 672 is designed to
measure pressures as low as 10˝ w.c. up to 400˝ w.c., very low ranges for
a single pressure transducer. The 672 also features a 0.25% F.S. accuracy.
Use the Series 672 in liquid level, flood warning, waste water, clean room,
and open channel flow applications.
GENERAL WARNINGS
• Transducer should not be subjected to greater than the maximum
allowable pressure or temperature as defined in the specifications.
• Transducer should not be subjected to mechanical impact.
• In the event of fire the end user must ensure that the system pressure is
vented to a safe area.
• The effects of decomposition of unstable fluids should be considered
when placing this device in service.
• The pressure transducer has no means of draining or venting, this must
be performed by another component in the end user’s system.
• The pressure range of the transducer must be compatible with the
maximum pressure being measured.
• Pressure media must be compatible with the transducer wetted parts
which are: UNS 31803 Stainless Steel, Ceramic, and Fluoroelastomer
(FKM).
• Exposed end of cable must be kept free from moisture.
• Liquid must not be allowed to freeze in the pressure port.
• Avoid mounting the transducer near a heat source that is likely to create
a temperature gradient across the instrument. If this is unavoidable, use
a heat shield to deflect uneven radiated heat or wrap the transducer in
insulation so that even temperature is assured throughout.
• The transducer should not be removed while the measured system is at
pressure.
• Care must be taken not to touch the pressure sensitive diaphragm while
cleaning the pressure port. This may cause irreparable damage.
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]
SPECIFICATIONS
Service: Compatible liquids and gases.
Wetted Materials: 318 Duplex SS, Ceramic, Fluoroelastomer (FKM).
Housing Material: 318 Stainless Steel.
Accuracy: ±0.25% F.S. (RSS). *Includes non-linearity, hysteresis, and
non-repeatability.
Stability: 0.25% F.S./1 year.
Temperature Limits: -40 to 212°F (-40 to 100°C).
Pressure Limits: 29 PSI (2 bar) for up to 85˝ w.c. (0.2 bar) ranges; 58 PSI
(4 bar) for 85˝ to 140˝ w.c. (0.2 to 0.35 bar); 73 PSI (5 bar) for 141˝ to
400˝ w.c. (0.35 to 1 bar).
Compensated Temperature Limits: -5 to 140°F (-20 to 60°C).
Thermal Effects:
Zero: 1.0%F.S./100°F (2.0%F.S./100°C).
Span: 1.0%F.S./100°F (2.0%F.S./100°C).
Power Requirements:
4-20 mA: 9-35 VDC
0-5 VDC: 7.5-35 VDC
Output Signal: 4-20 mA (2-wire) or 0-5 VDC (3-wire).
Zero & Span Adjustment: ±10% F.S. each (by Potentiometer).
Response Time: 5 ms.
Max Loop Resistance: 1.325 kΩ.
Electrical Connections: Large DIN 43650 connector with mating plug.
Enclosure Rating: NEMA 4X (IP65).
Process Connection: 1/4”-18 NPT male.
Weight: 11.6 oz (330 g).
Agency Approval: CE.
CE STANDARDS TESTED TO:
ELECTRO MAGNETIC COMPATIBILITY
Standards Applied
EN50081-1:1992
EN61000-6-2:1999
TEST METHODS/PROCEDURES
EN50081-1:1992
EN61000-6-2:1999
EN6100-4-2:1995 + A1:1998
EN61000-4-3:1996
EN61000-4-4:1995
EN61000-4-6:1996
Specifications - Installation and Operating Instructions
Series 672 Low Pressure Transducer
3-3/4 [95.48]
ø1-1/2 [38.10]
1/4 MALE NPT CONNECTION
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