The Series 631 Differential Pressure Transmitter monitors differential
pressure of air and compatible gases and liquids. The design employs
converting pressure changes into a standard 4-20 mA output signal for
two wire circuits. Digital push-button, zero and span adjustments are
easily accessed on the front cover. The Series 631 Differential Pressure
Transmitter is designed to meet NEMA-4X (IP66) construction.
Series 631 Differential Pressure Transmitter
Specifications - Installation and Operating Instructions
Bulletin E-114
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 gases & liquids.
Wetted Materials: Brass, silicone, 300 SS.
Accuracy: Transmitter Output: ±2% F.S. (includes linearity, hysteresis
and repeatability). Gage: ±3% of full scale at 70°F (21.1°C).
Stability: ±1% F.S./yr.
Temperature Limits: 20 to 120°F (-6.67 to 48.9°C).
Pressure Limits: -20˝ Hg to 500 psig. (-0.677 bar to 34.4 bar).
Thermal Effect: Greater than 1˝ ranges: ±0.025%/°F (±0.045%/°C); 1˝
range: ±0.045%/°F (±0.081%/°C); 0.5˝ range: ±0.09%/°F (±0.162%/°C).
Power Requirements: 10-35 VDC.
Output Signal: 4 to 20 mA.
Response Time: 50 msec.
Loop Resistance: 0-1250 ohms maximum.
Electrical Connections: M-12 circular 4 pin connector.
Process Connections: 1/4˝ female NPT high and low pressure taps,
duplicated - one pair top for air and gas, and one pair bottom for
liquids.
Enclosure Rating: Designed to meet NEMA 4X (IP66).
Mounting Orientation: Diaphragm in vertical position. Consult factory
for other position orientations.
Weight: 8 lb, 4 oz (3.74 kg).
Agency Approvals: CE.
R
5
[127.00]
DWYER INSTRUMENTS, INC. MICHIGAN CITY, IN 46360, USA.
4-45/64
[119.46]
3-13/32
[86.52]
13/32
[10.32] TYP
3/16
[4.76]
INSTALLATION
1. Location: Select a location where the temperature of the unit will be
between 20 and 120°F. Distance from the receiver is limited only by total
loop resistance (see electrical connections). The tubing feeding pressure
to the instrument can be practically any length required, but long lengths
will increase the response time slightly. Mount the instrument in a
location that will not be subject to excessive temperature, shock or
vibration.
2. Position: A vertical position is recommended (pressure connections
pointing vertically) since that is how all standard models were originally
spanned and zeroed at the factory.
3. Pressure Connection: Dual 1/4˝ female NPT pressure connections
are provided. Use pipe thread sealant tape or other suitable pipe joint
compound when making connection to the pressure source. Avoid
excess sealant which could block the pressure passage. When
monitoring liquid pressures, air trapped in the lines can cause incorrect
readings. Bleed fittings or similar mechanisms should be used to bleed
off any trapped air.
1/4 FEMALE NPT LOW
PRESSURE CONNECTION
(LIQUID)
(4) #6-32 X 3/8 [9.53] DP
HOLE ON A 4-11/32 [110.33]
BOLT CIRCLE
1/4 FEMALE NPT HIGH
PRESSURE CONNECTION
(LIQUID)
1/4 FEMALE NPT LOW
PRESSURE CONNECTION
(AIR OR GAS)
1/4 FEMALE NPT HIGH
PRESSURE CONNECTION
(AIR OR GAS)
3/4 [19.05] TYP
DWYER INST. INC
MICH CITY, IND
46360 U.S.A.
35° TYP
Series 631B
E-114:E-114 2/7/11 1:32 PM Page 1
(1 Seiten)
(4 Seiten)
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