Dwyer Instruments 626,628 Operating Manual

Series 626 & 628 Pressure Transmitters

LIQUID TIGHT FITTING

CORD DIAMETER RANGE

MALE FITTING

5-1/2 [139.70]

Specications - Installation and Operating Instructions

Bulletin E-111

.200 to .350 (5.08 to 8.89)

The Series 626 & 628 Pressure Transmitters converts a single positive pressure into a standard 4 to 20 mA output signal. The Series 626 and 628 can be used to accurately measure compatible gases and liquids; Series 626 full scale accuracy

is 0.25%; Series 628 full scale accuracy is 1.0% (see specications). Designed for industrial environments with a NEMA 4X (IP66) housing, this transmitter resists most

effects of shock and vibration.

Pressure Ranges

Pressure

Range

0-15 psia 15-0 psia 0-30 psia 0-50 psia 0-100 psia 0-200 psia 0-300 psia 0-5 psig 0-15 psig 0-30 psig 0-50 psig 0-100 psig 0-150 psig 0-200 psig 0-300 psig 0-500 psig 0-1000 psig 0-1500 psig 0-2000 psig 0-3000 psig 0-5000 psig 0-8000 psig

-CH Conduit Housing

1-9/32 [32.54]

1-3/32 [27.76]

1/4 NPT

Caution: Do not exceed specied supply voltage ratings. Permanent

damage not covered by warranty will result. This device is not designed

for 120 or 240 volt AC operation. Use only on 13 to 30 VDC.

Maximum

Pressure

30 psia 30 psia 60 psia 100 psia 200 psia 400 psia 600 psia 10 psig 30 psig 60 psig 100 psig 200 psig 300 psig 400 psig 600 psig 1000 psig 2000 psig 3000 psig 4000 psig 6000 psig 7500 psig 10000 psig

Over

Pressure

45 psia 45 psia 90 psia 150 psia 300 psia 600 psia 900 psia 50 psig 150 psig 300 psig 300 psig 500 psig 750 psig 1000 psig 1500 psig 2500 psig 5000 psig 5000 psig 5000 psig 7500 psig 10000 psig 12000 psig

2-15/16 [74.61]

OPTIONAL 1/4 NPT

FEMALE FITTING

3/4

[19.05]

3-1/2 [88.90]

1/4 NPT

-GH General Purpose Housing

1/4 NPT

7/8 [22.23]

HEX

SPECIFICATIONS Service: Compatible gases and liquids. Wetted Materials: Type 316 SS. Accuracy: 626: 0.25% FS, 0.20% RSS;

628: 1.0% FS, 0.5% RSS; 626 absolute ranges: 0.5% FS, 0.35% RSS. (Includes linearity, hysteresis, and repeatability).

Temperature Limit: 0 to 200°F (-18 to

93°C).

Compensation Temperature Range: 0

to 175° (-18 to 79°C).

Thermal Effect: 626: ±0.02% FS/°F. 628: ±0.04% FS/°F (includes zero and

span).

Pressure Limits: See table. Power Requirements: 10-30 VDC (for

4 to 20 mA, 0-5, 1-5, 1-6 VDC outpus); 13-30 VDC (for 0-10, 2-10 VDC outputs); 5 VDC ±0.5 VDC (for 0.5-4.5 VDC ratiometric output). Output Signal: 4 to 20 mA, 0-5 VDC,1-5 VDC, 0-10 VDC, or 0.5-4.5 VDC.

Response Time: 300 ms.

INSTALLATION

1. Location: Select a location where the temperature of the transmitter will be

between 0 and 175°F (-18 to 79°C). Distance from the receiver is limited only by

total loop resistance. The tubing or piping supplying pressure to the unit can be practically any length required but long lengths will increase response time slightly.

2. Position: The transmitter is not position sensitive. However all standard models are originally calibrated with the unit in a position with the pressure connection

downward. Although they can be used at other angles, for best accuracy it is

recommended that units be installed in the position calibrated at the factory.

3. Pressure Connection: Use a small amount of plumber’s tape or other suitable sealants to prevent leaks. Be sure the pressure passage inside the port is not blocked.

4. Electrical Connections

Wire Length - The maximum length of wire connecting the transmitter and receiver is a function of wire size and receiver resistance. Wiring should not contribute more than 10% of the receiver resistance to total loop resistance. For extremely long

runs (over 1000 feet), choose receivers with higher resistance to minimize the size and cost of connecting leads. Where wiring length is under 100 feet, wire as small

as 22 AWG can be used.

2-27/64 [61.52]

3-13/64 [81.36]

Loop Resistance: 0-1000 Ohms max.

R max = 50 (Vps-10) Ohms (4 to 20 mA output), 5K Ohms (0-5, 1-5, 1-6, 0-10, 2-10, 0.5-4.5 VDC output).

Current Consumption: 38 mA

maximum (for 4 to 20 mA output); 10 mA maximum (for 0-5, 1-5, 1-6, 0-10, 2-10,

0.5-4.5 VDC output); 140 mA maxumum

(for all 626/628/629-CH with optional

LED).

Electrical Connections: Conduit

Housing (-CH): terminal block, 1/2˝

female NPT conduit; General Purpose

Housing (-GH): cable DIN EN 175801-

803-C.

Process Connection: 1/4˝ male or

female NPT and BSPT.

Enclosure Rating: NEMA 4X (IP66). Mounting Orientation: Mount in any

position.

Weight: 10 oz (283 g). Agency Approvals: CE.

055/64 [21.83]

DWYER INSTRUMENTS, INC.

P.O. BOX 373 • MICHIGAN CITY, INDIANA 46360, U.S.A.

Phone: 219/879-8000

Fax: 219/872-9057

www.dwyer-inst.com

e-mail: info@dwyermail.com

CURRENT (4 to 20 mA) OUTPUT OPERATION

PRESS AND HOLD TO

PRESS TO

- TURN ON POWER

SO CAN RESULT IN THE GAGE DAMAGE.

PRESS AND HOLD TO

TERMINAL 4: (-)

out +]

3-5/16 [84.14]

1/4 NPT

Ø55/64

An external power supply delivering 10-30 VDC with minimum current capability of 40 mA DC (per transmitter) is required to power the control loop. See Figure A for connection of the power supply, transmitter and receiver. The range of appropriate receiver load resistance (RL) for the DC power supply voltage available is expressed

by the formula:

ZERO THE DISPLAY

SPAN

ZERO

PRESS TO

DISPLA

THE GAGE’S

PRESSURE

RANGE

1 RED

PRESSURE

TRANSMITTER

Conduit Housing with 4 to 20 mA Output (-CH) Electrical connections to the pressure

transmitters are made to the terminal block located inside the housing. Remove the screws and lift off the cover. Wire as shown in Figure A, B or C. Use Figure A for current output connection. Use Figure B for current output with optional LED display. Use Figure C for current output with optional LED display using two power supplies.

If ordering optional pre-wired cable, black wire is negative (-) and red wire is positive (+).

2 BLACK

3 (NC)

RL Max = Vps – 10 20 mA DC

RECEIVER

4 SILVER

SHIELD WIRE (NOT CASE GROUNDED)

Figure A: Current output connection

ZERO THE DISPLAY

SPAN

ZERO

POWER SUPPLY

13-30 VDC

DISPLAY

THE GAGE’S

PRESSURE

RANGE

POWER SUPPLY

(40 ma)

10-30 VDC

(100 ma)

LED SUPPLY POWER SUPPLY

TRANSMITTER CONNECTION:

- TURN OFF POWER

- CONNECT THE POWER SUPPLY AND RECEIVER TO TERM 1 AND TERM 2 OF THE GAGE AS SHOWN

- CONNECT LED POWER SUPPLY (-) TO TERMINAL 3

- CONNECT LED POWER SUPPLY (+) TO TERMINAL 4

- INSTALL THE DISPLAY’S CONNECTOR

- TURN ON POWER

Figure C: Current output with optional LED display using two power supplies

Hirschman DIN Connector with 4 to 20 mA When using cable version of -GH

General Purpose Housing, black wire is negative (-) and red wire is positive (+). When using optional Hirschman DIN Plug, remove top-center screw and lift off the terminal block assembly. Wire to terminals shown below in Figure D. For optional 4-pin M-12 connector, wire to pins as shown in Figure E.

RECEIVER

LED DISPLAY

NEGATIVE SUPPLY

LED DISPLAY

POSITIVE SUPPLY

TERM 1 (+)

TERM 2 (-)

TERM 3 (-)

TERM 4 (+)

OPTIONAL LED DISPLAY

BE SURE TO TURN OFF POWER WHEN CONNECTING OR REMOVING THE DISPLAY’S CONNECTOR. FAILURE TO DO SO CAN RESULT IN THE GAGE DAMAGE.

LED DISPLAY CONNECTOR

YELLOW

POWER

SUPPLY

10-30 VDC

(140 ma)

TRANSMITTER CONNECTION:

- TURN OFF POWER

- CONNECT THE POWER SUPPLY AND RECEIVER TO TERM 1 AND TERM 2 OF THE GAGE AS SHOWN

- CONNECT POWER SUPPLY (+) TO TERMINAL 4 (REQUIRED FOR THE OPTIONAL DISPLAY ONLY)

- INSTALL THE DISPLAY’S CONNECTOR

Figure B: Current output with optional LED display connection

RECEIVER

LED DISPLAY

POSITIVE SUPPLY

TERM 1 (+)

TERM 2 (-)

LED DISPLAY CONNECTOR

TERM 4 (+)

OPTIONAL LED DISPLAY

BE SURE TO TURN OFF POWER WHEN CONNECTING OR REMOVING THE DISPLAY’S CONNECTOR. FAILURE TO DO

YELLOW

TERMINAL 1: (+)

SECTION A-A

TERMINAL 1: (+) TERMINAL 2: (-)

Figure D Figure E

[21.83]

2-27/64 [61.52]

Figure F: Packard Connection

A; [-]

7/8

[22.23]

HEX

B; [+]

C; [GND]

A; [-]

TERMINAL 3: (GROUND)

B; [+]

C; [V

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