Dwyer Instruments Series 616 Manuel utilisateur

Model Range Max. Press. Model Range Max. Press.

616-00 0-1 in. w.c. 2 psig 616-8 0-10 psid 29 psig

616-0 0-2 in. w.c. 2 psig 616-9 0-20 psid 58 psig

616-1 0-3 in. w.c. 2 psig 616-10 0-30 psid 58 psig

616-2 0-6 in. w.c. 5 psig 616-11 0-50 psid 150 psig

616-3 0-10 in. w.c. 5 psig 616-12 0-100 psid 150 psig

616-4 0-20 in. w.c. 11 psig 616-3B 1.5-0-1.5 in. w.c. 2 psig

616-5 0-40 in. w.c. 11 psig 616-6B 3-0-3 in. w.c. 5 psig

616-6 0-100 in. w.c. 29 psig 616-10B 5-0-5 in. w.c. 5 psig

616-7 0-200 in. w.c. 29 psig 616-20B 10-0-10 in. w.c. 11 psig

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]

The Series 616 Differential Pressure Transmitter senses the pressure

of air and compatible gases and sends a standard 4-20 mA output

signal. A wide range of models are available factory calibrated to specific

ranges as listed in the chart below. The span and zero controls are for

use when checking calibration. They are not intended for re-ranging to a

significantly different span. Versatile circuit design enables operation in

2, 3 or 4-wire current loops.

For applications requiring direct pressure readings or percent of full span

output, the optional Model A-701 Digital Readout makes an ideal

companion device. It provides a bright red 0.6˝ high, 3-1/2 digit LED

display while supplying power to the Series 616 transmitter. For

additional information on these and other transmitters, see the Dwyer

Instruments, Inc. Full Line catalog.

Series 616 Differential Pressure Transmitter

Bulletin E-43

Specifications – Installation and Operating Instructions

5/16

[7.950]

7/8

[22.23]

3-21/64

[84.53]

2-13/32

[61.12]

1/2

[12.70]

1/2

[12.70]

1-1/2

[38.10]

2-1/4

[57.15]

ø5/32 [3.97]

MOUNTING HOLE

TYP 2 PLACES

HI LO

SPECIFICATIONS

Service: Air and non-combustible, compatible gases.

Wetted Materials: Consult factory.

Accuracy: 616: ±0.25% F.S.; 616C: ±1.0% F.S.

Stability: ± 1% F.S./yr.

Temperature Limits: 20 to 120°F (-6.67 to 48.9°C).

Pressure Limits: See Chart.

Thermal Effect: 616: ±0.055% F.S./°F (0.099% F.S./°C); 616C:

±0.070% F.S./°F (0.125% F.S./°C).

Power Requirements: 10-35 VDC (2, 3 or 4 wire); 16-26 VAC (4 wire).

Output Signal: 4 to 20 mA.

Zero and Span Adjustments: Potentiometers for zero and span.

Loop Resistance: DC: 0-1250 ohms maximum; AC: 0-1200 ohms

maximum.

Current Consumption: DC: 38 mA maximum; AC: 76 mA maximum.

Electrical Connections: Screw-type terminal block.

Process Connections: Barbed, dual size to fit 1/8˝ and 3/16˝

(3.12 mm and 4.76 mm) I.D. rubber or vinyl tubing.

Mounting Orientation: Vertical, consult factory for other position

orientations.

Weight: 1.8 oz. (51 grams).

Series 616 Transmitter Models and Ranges*

*All models available with 0.25% F.S. Accuracy.

Models available with 1.0% F.S. Accuracy include 616-1 through 616-20B.

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Installation

1.0 Location

Select a clean, dry mounting location free from excess vibration where

the temperature will remain between 20 and 120˚F (-6.7 and 48.9˚C).

Distance from the receiver is limited only by total loop resistance. See

Electrical Connections below. The tubing supplying pressure to the

instrument can be practically any length required, but long lengths will

increase response time slightly.

2. Position

A vertical position, with pressure connections pointing down, is

recommended. That is the position in which all standard models are

spanned and zeroed at the factory. They can be used at other angles, but

final spanning and zeroing must be done while transmitter is in that

alternate position.

Pressure Connections

Two integral barbed tubing connections are provided. They are dual-

sized to fit both 1/8˝ and 3/16˝ (3.12 and 4.76 mm) I.D. tubing. Be sure

the pressure rating of the tubing exceeds that of the operating ranges.

On ranges over 20 psi, we recommend use of a suitable hose clamp to

assure the integrity of the connection.

Electrical Connections

CAUTION: Do not exceed specified supply voltage ratings.

Permanent damage not covered by warranty will result. This unit is

not designed for 120 or 240 volts AC line operation.

Electrical connections are made to the terminal block located on the top

of the transmitter. Terminals are marked 1, 2, 3 and 4 (see Fig. B below).

Determine which of the following circuit drawings applies to your

application and wire accordingly.

Figure B

Wire Length

The maximum length of wire connecting 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 size and cost of connecting leads. Where wiring

length is under 100 feet, hook-up wire as small as 22 AWG can be used.

2-Wire Operation

An external power supply delivering 10-35 VDC with minimum current

capability of 40 mA DC (per transmitter) must be used to power the

control loop. See Fig. C for connection of the power supply, transmitter

and receiver. Note the jumper between terminals 3 and 4. The range of

appropriate receiver load resistance (RL) for the DC power supply voltage

available is expressed by the formula and graph in Fig. F. Shielded two

wire cable is recommended for control loop wiring. If grounding is

required, use the negative side of the control loop after the receiver.

Otherwise, in 2-wire operation it is not necessary to observe polarity of

control loop connections.

2-Wire Connections

Figure C

3-Wire Operation

An external power supply delivering 10-35 VDC with minimum current

capability of 40 mA DC (per transmitter) is required. See Fig. D for

connection of power supply, transmitter and receiver. The range of

appropriate receiver load resistance (RL) for the DC power supply

available is expressed by the formula and graph in Fig. F. Shielded cable

is recommended for control loop wiring. Do not employ a separate

ground in 3-wire operation. Unit will not function properly and/or damage

could result. Control loop polarity must be observed in the following

respect. Although power supply terminals 1 and 2 are not polarized, the

receiver must be connected between terminal 3 of transmitter and

negative side of power supply.

3-Wire Connections

Figure D

4-Wire Operation

An external power supply delivering 10-35 VDC with a minimum current

capability of 40 mA DC (per transmitter) or 16-26 VAC with a minimum

current capability of 80 mA AC (per transmitter) is required. See Fig. E

for connection of power supply, transmitter and receiver. The range of

appropriate load resistance (RL) for the DC or AC power supply available

is expressed by the formulas and graphs in Fig’s. F and G. Shielded

cable is recommended for control loop wiring. Do not employ a separate

ground in 4-wire operation. Unit will not function properly and/or damage

could result. Control loop polarity must be observed; terminal 3 is

negative and terminal 4 is positive.

SPAN AND

ZERO ADJUST

HI LO

1 2 3 4

POWER

SUPPLY

10-35 VDC

PRESSURE

TRANSMITTER

Jumper

Wire

Receiver

PRESSURE

TRANSMITTER

Receiver

POWER

SUPPLY

10-35 VDC

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4-Wire Connections

Figure E

Power Supply Voltage – VDC (2, 3 or 4-wire)

Figure F

Power Supply Voltage – VAC (4-Wire)

Figure G

Calibration Check

Each Series 616 Transmitter is factory calibrated to the range given in

the model chart. To check calibration and adjust if necessary, the

following procedure should be used. For purposes of clarification in these

instructions, range is defined as that pressure which, applied to the

transmitter, produces 20 milliamps of current in the loop. Zero pressure

is always assumed to be 4 milliamps.

1. With the transmitter connected to the companion receiver, insert an

accurate milliameter in series with the current loop. Full scale range

should be approximately 30 mA.

2. Connect a controllable pressure source to one leg of a tee with the

other two legs connected to the high pressure port of the transmitter and

the third leg to an accurate test gage or manometer, in an appropriate

range. The low pressure port should be vented to atmosphere.

Calibration must be performed with the unit in the same position in which

it will be mounted.

3. Apply electrical power to the unit and allow it to stabilize for 10

minutes.

4. With no pressure applied to the transmitter, adjust ZERO control so

that loop current is 4 mA.

5. Apply full range pressure and adjust loop current to 20 mA using SPAN

control.

6. Relieve pressure and allow transmitter to stabilize for 2 minutes.

7. Zero and span controls are slightly interactive, so repeat steps 4

through 6 until zero and full range pressures consistently produce

currents of 4 and 20 mA respectively.

8. Remove the milliameter from the current loop and proceed with final

installation of the transmitter and receiver.

Voltage Input

Series 616 Transmitters can be easily adapted for receivers requiring 1-

5 or 2-10 VDC inputs. Insert a 249 ohm, 1/2 watt (1-5 VDC) or 499 ohm

(2-10 VDC) resistor in series with the current loop but in parallel with the

receiver input. Locate this resistor as close as possible to the input.

Because resistor accuracy directly influences output signal accuracy, we

recommend use of a precision ±0.1% tolerance resistor to minimize this

effect. See Fig. H and J below.

3-Wire Connection (1-5 or 2-10 VDC Output)

Figure H

1300

1200

1100

1000

900

800

700

600

Total Receiver Resistance (W)

Maximum Value (1200 W)

R Max. = 65 (Vps)-490

Operating

Region

0 5 10 15 16

18 20 25 26 30

1500

1400

1300

1200

1100

1000

900

800

700

600

500

400

300

200

100

Total ReceiverResistance (W)

Maximum Value (1250 W)

R Max. =

0 5 10 13 15 20 25 30 35 40

Vps–10.0

20mA DC

Operating

Region

PRESSURE

TRANSMITTER POWER

SUPPLY

10-35 VDC

VDC

PRESSURE

TRANSMITTER Receiver

POWER

SUPPLY

10-35 VDC

16-26 VAC

E-43:E-43 5/24/10 4:10 PM Page 3

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4-Wire Connection (1-5 or 2-10 VDC Output)

Figure J

Multiple Receiver Installation

An advantage of the standard 4-20 mA DC output signal produced by the

Series 616 Transmitter is that any number of receivers can be connected

in series in the current loop. Thus, an A-701 Digital Readout, an analog

panel meter, a chart recorder, process controlling equipment or any

combination of these devices can be operated simultaneously. The only

requirement is that each component be equipped for a standard 4-20 mA

input and the proper polarity of the input connections be observed when

inserting the device in the current loop. If any of the units display a

negative or downscale reading, the signal input leads are reversed.

Maintenance

Upon final installation of the Series 616 Differential Pressure Transmitter

and the companion receiver, including the A-701 Digital Readout, no

routine maintenance is required. A periodic check of the system

calibration is recommended following the procedures explained on page

3 under Calibration Check. The Series 616 Transmitter is not field

serviceable and should be returned, freight prepaid, to the factory if

repair is required. Please enclose a description of the problems

encountered plus any available application information. The A-701

should be returned directly to its manufacturer for service. See the A-701

instructions for address.

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]

POWER

SUPPLY

10-35 VDC

16-26 VAC

PRESSURE

TRANSMITTER

VDC

E-43:E-43 5/24/10 4:10 PM Page 4

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