Dwyer Instruments 668B Series Manuale utente

Series 668B/D Compact Differential Pressure Transmitter

Specications - Installation and Operating Instructions

Bulletin P-668BD

Our low cost Series 668B/D Compact Differential Pressure Transmitter is capable of

sensing differential gage pressure with ±0.8% FS accuracy, and converts this pressure

difference to a proportional high level analog output for both unidirectional and bi-

directional pressure ranges. Transmitters can withstand up to 15 psig overpressure

with no damage to the unit. The compact, lightweight design makes installation

simple and easy. Units are protected against incorrect wiring, and include a protective

terminal cover.

INSTALLATION

Work on electrical installations must only be carried out by electricians who are

specically trained for this purpose.

The Series 668B/D is designed to be used with 3/16˝ I.D. push-on tubing. The high

pressure port and the low pressure port are labeled “+” and “-” respectively. For best

results (shortest response times), 3/16˝ I.D. tubing is suggested for tubing lengths up

to 80 feet (25 meters), 1/4˝ I.D. for tubing lengths up to 250 feet (75 meters) and 3/8˝

I.D. for tubing up to 720 feet (220 meters).

The table below shows the maximum wire and receiver resistances as a function of

supply voltage (See Figure 1).

Example: If the Supply Voltage is 24 VDC, RL≤50(24-12)=600 Ω, the load resistance

should not exceed 600 Ω.

SPECIFICATIONS

Service: Air and non-conductive gases.

Accuracy: ±0.8% FS.

Temperature Limits: Operating: 0 to 170°F (-18 to 77°C); Storage: -40 to 185°F

(-40 to 85°C).

Pressure Limits: 15 psig (1.0 bar).

Thermal Effects: ±0.03% FS/°F (±0.054% FS/°C).

Compensated Range: From 40 to 170°F (4.4 to 77°C).

Power Requirements: 12 to 32 VDC.

Output Signals: 4 to 20 mA (2-wire), 0 to 10 VDC (3-wire), or 0 to 5 VDC (3-wire).

Zero Adjustment: Accessible under the small terminal cover.

Electrical Connection: Terminal strip.

Process Connection: 3/16˝ OD barbed brass for 1/8˝ ID push-on tubing.

Enclosure: Stainless steel and PC+ABS alloy, UL 94 V-0 rated.

Weight: 4.0 oz (113 g).

Agency Approvals: CE.

3-15/32 [88.00]

3-5/32 [80.00]

1-57/64

[48.20]

2X 3/16

[ø4.80]

1-13/32

[35.60]

1-45/64

[43.25] 1-3/16

[30.20]

1-45/64

[43.25]

3-15/32 [88.00]

3-5/32 [80.00]

1-9/32

[32.60]

2X 3/16

[ø4.80]

1-57/64

[48.20]

1-7/32

[30.80]

3-21/32

[92.94]

668D

668B

668D

Risk of Shock: Disconnect power supply before making electrical

connections. Contact with components carrying hazardous voltage

can cause electrical shock and equipment may be damaged.

CAUTION

Vmin Vmax Rmin Rmax RL at Supply Voltage (Vs)

12 32 0 1000 RL≤50(Vs-12)

010203

040

500

1000

1500

POWER SUPPLY VOLTAGE

*Loop Resistance = Wire Res. + Receiver Res.

LOOP RESISTANCE (OHMS)*

OPERATING

REGION

MAXIMUM RESISTANCE

Figure 1

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: [email protected]

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: [email protected]

VOLTAGE OUTPUT

The 668B/D has a 0 to 5 or 0 to 10 VDC output in a 3-wire conguration, with three

terminals available for wiring. These terminals have the designation “+”, “O”, and

“-” (See Figure 2). The power supply and signal references are commoned on the

circuit (See Figure 3), and the 668B/D voltage output can operate from 12 to 32 VDC

power supply. The unit is calibrated at the factory with a 24 VDC power supply, 50 KΩ

load resistor.

Connect the “+” terminal to the positive terminal of the DC power supply.

Connect the “O” terminal to the positive terminal of the control or pressure monitor.

Connect the “-” terminal as the reference for the power supply and output signal.

CURRENT OUTPUT

The 668B/D current output is a 2-wire loop-powered 4 to 20 mA current output unit and

delivers rated current into any external load to 0 to 1000 Ω. These terminals have the

designation of “+” and “-” (See Figure 2). The current ows into the “+” terminal and

returns back to the power supply through the “-” terminal (See Figure 4). The 668B/D

current output can operate from 12 to 32 VDC power supply. The unit is calibrated at

the factory with a 24 VDC loop supply voltage and a 250 Ω load resistor.

CALIBRATION

The 668B/D transmitter is calibrated in the vertical mounting position at the factory.

The zero adjustment is accessible under the terminal cover of the unit in case there is

a zero shift when using other positions.

Zero Adjustment

While monitoring the output of the unit with both pressure ports open to atmosphere,

the zero may be adjusted by turning the zero adjustment screw.

Voltage Output:

Unidirectional Pressure Ranges: 0 VDC

Bi-directional Pressure Ranges: 2.5 VDC or 5.0 VDC

Current Output:

Unidirectional Pressure Ranges: 4 mA

Bi-directional Pressure Ranges: 12 mA

MAINTENANCE/REPAIR

Upon nal installation of the Series 668B/D transmitter no routine maintenance is

required. The Series 668B/D transmitter is not eld serviceable and should be returned

if repair is needed. Field repair should not be attempted and may void warranty.

WARRANTY/RETURN

Refer to “Terms and Conditions of Sales” in our catalog and on our website. Contact

customer service to receive a Return Goods Authorization number before shipping the

product back for repair. Be sure to include a brief description of the problem plus any

additional application notes.

+ EXC + OUT

– EXC

668B/D

READOUT

DAS

POWER

SUPPLY

+ EXC – EXC

668B/D

CURRENT

MONITORING

DEVICE

POWER

SUPPLY

Figure 2

Figure 3

Figure 4

Questo manuale è adatto per i seguenti modelli

Altri manuali Dwyer Instruments Trasmettitore

Dwyer Instruments

Dwyer Instruments 616W-2 Manuale utente

Dwyer Instruments

Dwyer Instruments Spirahelic 7000 Series Istruzioni per l'installazione e il funzionamento

Dwyer Instruments

Dwyer Instruments 641B Series Manuale utente

Dwyer Instruments

Dwyer Instruments TBU-00 Istruzioni per l'installazione e il funzionamento

Dwyer Instruments

Dwyer Instruments PMT2 Series Manuale utente

Dwyer Instruments

Dwyer Instruments CMT200 Manuale utente

Dwyer Instruments

Dwyer Instruments DPT series Istruzioni per l'installazione e il funzionamento

Dwyer Instruments

Dwyer Instruments Magnesense Pro MSX Series Istruzioni per l'installazione e il funzionamento

Dwyer Instruments

Dwyer Instruments 685 Series Manuale utente

Dwyer Instruments

Dwyer Instruments PROXIMITY Series Manuale utente

Dwyer Instruments

Dwyer Instruments CDT-2W44-LCD Manuale utente

Dwyer Instruments

Dwyer Instruments Magnesense II MS2 Istruzioni per l'installazione e il funzionamento

Dwyer Instruments

Dwyer Instruments 626 series Manuale utente

Dwyer Instruments

Dwyer Instruments DM DigiMag Series Manuale utente

Dwyer Instruments

Dwyer Instruments ProxiMity UL Series Manuale utente

Dwyer Instruments

Dwyer Instruments Magnesense MS Series Manuale utente

Dwyer Instruments

Dwyer Instruments CDX Series Supplemento

Dwyer Instruments

Dwyer Instruments AVUL Series Manuale utente

Dwyer Instruments

Dwyer Instruments Magnesense DWMS-112 Istruzioni per l'installazione e il funzionamento

Dwyer Instruments

Dwyer Instruments GSTA Series Manuale utente

Dwyer Instruments

Dwyer Instruments CDT Series Manuale utente

Dwyer Instruments

Dwyer Instruments AVLV Series Istruzioni per l'installazione e il funzionamento

Dwyer Instruments

Dwyer Instruments DM-2000 Manuale utente

Dwyer Instruments

Dwyer Instruments RHP-W series Istruzioni per l'installazione e il funzionamento

Manuali Trasmettitore popolari di altre marche

NIVELCO

NIVELCO EasyTREK SCA-300 Series Manuale del proprietario

Honeywell

Honeywell 5816WMBR Manuale utente

Kamstrup

Kamstrup READy MTU Istruzioni operative

Omega

Omega ZW Series Manuale utente

ABB

ABB Field 264H Guida

Alinco

Alinco DJ-V17T Manuale utente

Dejero

Dejero EnGo 3x Manuale utente

Rosemount

Rosemount 4600 Manuale utente

Speaka Professional

Speaka Professional 2342740 Manuale utente

trubomat

trubomat GAB 1000 Manuale utente

Teledyne Analytical Instruments

Teledyne Analytical Instruments LXT-380 Manuale utente

Rondish

Rondish UT-11 Manuale utente

MG 10JRE Manuale utente

Burkert

Burkert 8177 Manuale utente

Firetide

Firetide HotPort 3203 Manuale

Tele Radio

Tele Radio T9-02 Manuale utente

Rotronic

Rotronic HygroFlex HF3 Series Manuale utente

Jamara

Jamara FCX6 Pro Tel Manuale utente