Omega DFM User guide

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SERIES DFM | DIGITAL FLOW METER

BENEFITS/FEATURES

• Quick (<20 ms) response time

• Multi-parameter functionality

• Multi-gas functionality

• Capable of storing up to 90 gases and 20 custom gas mixes

•Simpleeldconguration

•Modiableoutputs

•High,loworin-rangealarmswithpresetactiondelayformassow,temperatureandpressure

DESCRIPTIONAPPLICATIONS

• Gas ow measurement

• Operating pumps and valves

• Process equipment

• Scientic and analytical

• Bioreactors and surface depositions

• Gas sampling

• General manufacturing

The Series DFM Digital Flow Meter is the industry leader in the

measurement of mass and volumetric ow rates of process gases. Using the OLED/joystick interface, the owmeter can measure up to 30 different gases. Simultaneous displays of mass ow, volumetric ow, pressure and temperature parameters promote applications in a variety of industries.

SPECIFICATIONS

Service Clean, non-corrosive gases compatible with wetted parts.

Wetted Materials 316 SS, 416 SS, high temperature polyamide, alumina ceramic, epoxy, silicone, glass, gold. FKM O-rings.

Accuracy ±(0.5% of reading + 0.2% FS).

Repeatability ±0.15% FS.

Response Time 10 ms.

Output 0-5 VDC, 0-10 VDC and 4-20 mA.

Relay Rating Programmable solid state relay.

Max. Particulate Size 20 microns.

Temperature Limits 14 to 140°F (-10 to 60°C).

Power Supply 9-26 VDC.

Process Connections 1/8˝ compression tting for ow rates ≤ 10 L/min; 1/4˝ for ≤ 50 L/min; 3/8˝ for ≤ 100 L/min.

Display 2 x 16 character OLED (model selectable).

Pressure Limits 120 psig (8.27 bar).

Leak Integrity 1 x 10

Weight DFM-01/50: 0.85 lb (0.4 kg); DFM-51/56: 1.15 lb (0.52 kg).

Agency Approvals CE.

-9

sccs of helium.

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DIMENSIONS

TIP RX [-]

PHONEJACK

ADDRESS: FF

RS-232 SIGNAL AND GND

1-17/64

Ø0.22 2 HOLES

1-17/64

[19.05]

[20.32]

[32.26]

6-32 UNC-2B

2-3/8 [60.45]

1-27/32

[46.99]

51/64 [20.32]

17/64 [6.73]

1-3/64 [26.67]

[2 PORTS]

17/32

[13.34]

Range A B C

0.5 mL/min-50 mL/min 51 mL/min-20 L/min

4-13/32 [111.76] 4-37/64 [116.33]

4-37/64 [116.33] 4-13/32 [111.76]

WIRING DIAGRAM

17/32

[13.34]

10-32 UNF-2B 1/8-27 NPT

8-32 UNC-2B

Ø0.30 [4] HOLES

Ranges 21 L/min-100 L/min (DFM-51/56)Ranges 0.5 mL/min-20L/min (DFM-01/50)

4 [101.60]

2-1/2 [63.50]

3/16 [4.57]

3/4

4-27/32 [123.19]

1/4-18 NPT

[2 PORTS]

31/64

[12.45]

1-1/4

[31.75]

[32.26]

1-19/32

[40.64]

51/64

DIN connector wiring

PIN Function Note

Solid state SPST relay NO (normally open)

contact #1

Solid state SPST relay NO (normally open)

contact #2

RS-232 RX/RS-485 (-) communication

interface input Analog (0-5 VDC, 0-10 VDC, 4-20 mA) input/

output reference (-) RS-232 TX / RS-485(+) communication

interface input Analog (0-5 VDC, 0-10 VDC or 4-20 mA)

output (+)

Power supply, positive (+) Power input 9-26 VDC.

Power supply, common (-)

RS-232 signal ground

Do not exceed SSR maximum voltage 48 AC peak/DC and maximum load current 400 mA.

Also accessible via audio jack connector (see gures 2 and 25 in IOM). Common (return) for pin 6 (0-5 VDC or 0-10 VDC or 4-20 mA). Also accessible via audio jack connector (see gures 2 and 25 in IOM). Output. Do not apply external voltage or any current source. Be sure to observe recommended load impedance.

Power input and RS-232 communication

common.

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WIRING DIAGRAM

TIP RX [-]

PHONEJACK

ADDRESS: FF

RS-232 SIGNAL AND GND

HOST PC

WITH RS-232 INTERFACE

NOTE: CROSSOVER CONNECTION HAS TO BE ESTABLISHED.

RX [-] TX [+] GND

RS-232 SIGNAL GND

X X X

X X

SLEEVE GND

RING TX [+]

RS-232 wiring (default)

RS-232 TX

RS-232 RX

STEREO

TX [+]

RX [-]

HOST PC WITH

RS-232 INTERFACE

RX [-] TX [+] GND

WHITE

RED

PHONEJACK STEREO

SHIELD

SLEEVE GND

RS-232 RX

RS-232 TX

RS-232

RS-485

TX [+]

RX [-]

NOTES:

1. RS-232 TO RS-485 CONVERTER HAS TO BE CONFIGURED FOR 2 WIRE HALF DUPLEX SYSTEM.

2. UP TO 64 DEVICES ON ONE RS-485 SEGMENT, UP TO 2000 FEET.

GND

T [-]

T [+]

DFM #1 DFM #2 DFM #3 DFM #4 DFM #64

ADDRESS: 11 ADDRESS: 12 ADDRESS: 13 ADDRESS: 14

RING TX [+]

TIP RX [-]

RS-485 wiring (display selectable)

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HOW TO ORDER

Use the bold characters from the chart below to construct a product code.

DFM -22 010 -V

SERIES

DFM: Digital ow controller

PRESSURE RANGE*

-22: 0 to 100 mL/min

-26: 0 to 200 mL/min

-32: 0 to 500 mL/min

-37: 0 to 1000 mL/min

-39: 0 to 2 L/min

-43: 0 to 5 L/min

-48: 0 to 10 L/min

-56: 0 to 100 L/min

BODY SIZE

005: Very low ow 010: Low ow 050: Medium ow 100: High ow

*Consult factory for ranges up from 0-0.5 mL/min to 0-100 L/min.

ACCESSORIES

L 2-A A

DIGITAL INTERFACE

2: RS-232 default (RS-485 display

selectable) 3: RS-232 with Modbus® (RS-485 display selectable)

OUTPUT SIGNAL

A: 0-5 VDC default (4-20 mA, 0-10

VDC display selectable)

DISPLAY

L: LED display

FITTINGS

-A: 1/8˝ compression (very low, low)

-B: 1/4˝ compression (medium)

-D: 3/8˝ compression (high)

SEAL MATERIAL

-V: Fluoroelastomer

Model Description GFM-110P

GFM-220PE

110 V power supply 220 V power supply

Note: 1.5 ft RS-232 interface 3-wire 9-pin D connector included. For RS-485 contact factory for A-DFM-CBL-A485DP 3 ft RS-485 3.5 mm stereo-audio connection with stripped ends available for purchase.

Modbus® is a registered trademark of Schneider Automation, Inc.

DWYER INSTRUMENTS, INC.

Important Notice: Dwyer Instruments, Inc. reserves the right to make changes to or discontinue any product or service identied in this publication without notice. Dwyer advises its customers to obtain the latest version of the relevant information to verify, before placing any orders, that the information being relied upon is current.