Dwyer 647 - Manual

Series 647 Wet/Wet Differential Pressure Transmitter
Specifications - Installation and Operating Instructions
Bulletin A-30-647
DWYER INSTRUMENTS, INC.
Phone: 219/879-8000 www.dwyer-inst.com
P.O. BOX 373 • MICHIGAN CITY, INDIANA 46360, U.S.A. Fax: 219/872-9057 e-mail: [email protected]
SPECIFICATIONS
Service: Compatible gases or liquids on both pressure and reference
sides.
Wetted Materials: Brass, vinyl, glass-filled polyester, silicon, and
florosilicone.
Accuracy: ±1.0% FS.
Stability: ±1.5% FS output/year.
Temperature Limits: 32 to 122°F (0 to 50°C).
Pressure Limits: Ranges 1 in w.c. to 5 psi: 20 psi, 15 psi range: 45
psi, 30 psi range: 60 psi.
Thermal Effects: Zero: ±0.05% FS/°F, Span: ±0.05% rdg/°F.
Power Requirements: 18 to 30 VDC.
Output Signal: 4 to 20 mA, 2-wire.
Zero and Span Adjustments: Adjustable, ±10%.
Loop Resistance: 400Ω @ 18 VDC, 600Ω @ 24 VDC, 1000Ω @ 30
VDC.
Electrical Connection: Screw terminals, reverse polarity protected.
Process Connections: Two 1/8˝ female NPT.
Housing: Gasketed steel epoxy painted, NEMA 4 (IP56).
Weight: 14 oz (397 g).
1-1/16 [26.97] TYP
3-5/16
[84.15]
1-1/8
[28.58] 2-7/8
[73.03]
2-15/16
[74.63]
1/8 FEMALE NPT
HIGH PRESSURE
CONNECTION
5-9/16
[141.30]
Ø7/8 [22.23]
CONDUIT
CONNECTION
1/8 FEMALE NPT
LOW PRESSURE
CONNECTION
1-17/64
[32.15]
2-1/2
[63.50]
5 [127.00]
(4) 1/4 [6.35] LONG X 7/32 [5.56]
WIDE MOUNTING HOLES 1
The Series 647 Wet/Wet Differential Pressure Transmitter is
designed for use with compatible liquids or gases and can accurately
measure differential pressure down to 1˝ H
2
O. The transmitter contains
a fast response piezoresistive sensor and a unique isolation system
ideal for HVAC systems, filter monitoring, variable speed drive control,
air/liquid flow monitoring and process control.
The Series 647 Wet/Wet Differential Pressure Transmitter features
excellent repeatability, low hysteresis and accurate operation over a
broad temperature range. Units have an adjustable zero and span and
feature reverse polarity protection.
MECHANICAL INSTALLATION
The unit can measure gauge, vacuum or differential pressure. Follow the
directions below for the appropriate port connections.
Gauge (Positive) pressure sensing: Connect media pressure port
labeled “HIGH” with port labeled “LOW” vented to atmosphere.
Vacuum (Negative) pressure sensing: Connect media pressure to port
labeled “LOW”, with port labeled “HIGH” vented to atmosphere.
Differential pressure sensing: Connect the higher of the two media
pressure to port labeled “HIGH”, and the lower of the two pressures to
port labeled “LOW”. The Series 647 Wet/Wet Differential Pressure Transmitters have 1/8˝
female NPT port connectors. ALWAYS USE A SECOND WRENCH TO
HOLD THE PORT HEX NUT, THEREBY ELIMINATING THE
POSSIBILITY OF ROTATING THE BRASS PORT FITTING. Use thread
sealant or teflon tape to insure proper sealing.
Model
647-0
647-1
647-2
647-3
647-4 Range
0 to 1˝ w.c.
0 to 3˝ w.c.
0 to 25˝ w.c.
0 to 5˝ w.c.
0 to 10˝ w.c. Model
647-5
647-6
647-7
647-8 Range
0 to 1 psid
0 to 5 psid
0 to 15 psid
0 to 30 psid
The Series 647 Wet/Wet Differential Pressure Transmitter can
be mounted in any position, however, be alert to moisture
passing through a non-waterproof electrical connector.
NOTICE