Dwyer 655A Manuel d'utilisateur télécharger pdf

Bulletin P-4-655A

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 - Installation and Operating Instructions

Series 655A Wet/Wet Differential Pressure Transmitter

SPECIFICATIONS

Service: Compatible gasses or liquids.

Wetted Materials: 316L SST.

Accuracy: ±0.25% BFSL, RSS (combined effect of non-linearity,

hysteresis, and repeatability).

Stability: ≤ ±0.25% FSO/yr.

Temperature Limits: -20 to 200°F (-29 to 93°C).

Compensated Temperature Limits: 0 to 170°F (-17.8 to 76.7°C).

Pressure Limits: 1000 psi (68.95 bar) continuous; 3000 psi (206.8

bar) burst.

Thermal Effects: ≤ ±1.5% F.S. oven comp. temperature range.

Power Requirements: 8 to 38 Vdc.

Output Signal: 4 to 20 mA.

Static Pressure Effects: on zero: ≤ ±0.25% FSO per 1000 psi;

on span: ≤ ±0.5% of reading per 1000 psi.

Loop Resistance: 1500 ohms.

Electrical Connections: Cable exit with 24˝ cable; optional 6-pin

connector.

Process Connections: 1/4˝ NPT female.

Enclosure Rating: Designed to meet NEMA 4X (IP66).

Mounting Orientation: Mount in vertical position: zero shifts up to

1˝ ±H

O depending on orientation.

Response Time: < 10 mS.

Weight: 18 oz (510 g).

Agency Approval: CE.

The Series 655A Differential Pressure Transmitter converts a positive

differential pressure measurement into a standard 4-20 mA output

signal. Designed for use as a wet/wet differential pressure transmitter, it

can be used to measure gas or liquid pressure compatible with 316L

stainless steel wetted parts. With an accuracy of < ±0.25% (BFSL, RSS),

the Series 655A Pressure Transmitter can measure low differential

pressures, but can withstand working pressures to a maximum of 1000

psi (68.95 bar), 3000 psi (206.8 bar) burst.

INSTALLATION

Location

Select a location where the temperature of the transmitter will be

between -20 to 200°F (-29 to 93°C). Distance from the receiver is limited

only by total loop resistance. Tubing or piping of extended lengths will

increase response time slightly.

Position

The transmitter is not position sensitive. However, all standard models

are originally calibrated with the unit in a vertical position and with the

pressure connections at horizontal. Although they can be used at other

angles, for best accuracy it is recommended that zeroing and spanning

be done while unit is in the alternative position.

Pressure Connections

Pressure connections are 1/4˝ female NPT. Use a small amount of

plumbers thread tape or other suitable sealant to prevent leaks. Be sure

the pressure passage inside the port is not blocked.

655A-XX-P MODELS

(4-3/4) [120.65]

2 [50.80]

4 WIRE CABLE

1/4” FEMALE NPT

1-1/4 [31.75]

(2-35/64) [64 77]

P-4-655A:TEMPLATE 2/26/09 3:05 PM Page 1

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DWYER INSTRUMENTS, INC 1

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Bulletin P-4-655ADWYER INSTRUMENTS, INC.Phone: 219/879-8000 www.dwyer-inst.comP.O. BOX 373 • MICHIGAN CITY, INDIANA 46361, U.S.A. Fax: 219/872-9057 e-

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Dwyer 655A Manuel d'utilisateur

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