PRODUCT INFORMATIONDIGITAL FLOW METER

DF-R280

Digital Flow Meter

Various applications from in-line test to lab use.
Large LCD screen displays a lot of info besides flow.
Accuracy ±1% of reading supported.
* Flow range: 1 L/min or more

■ Features
Easy-to-navigate configuration with icons Each menu opens by simply
touching an icon.
Test pressure and flow can be monitored in charts.
Language selectable (English, Japanese, Chinese)
Various Hold functions
Provides desired data.
Easy data collection via USB port.
Full 4-digit display
FTP available for Ethernet. (When the Memory is selected)■ Application Examples• High-accuracy flowmeter for labs
• Flow and leak tests for auto parts• Flow test for gas equipment• Flow test for valves• Flow test for medical devices• Flow test for pumps and pipes• Others

AutomotiveEngine assembly

Muffler

Valve seatFilterGas

Air filter

Gas stove

Oil filter

Fuse gas

Gas meter

DF-R280-985B1-C

● Measurement screen can be selected from “Advanced”, “Waveform”, and “Simple”● English, Japanese, and Chinese● Large numeric keyboard pops up foreasy test parameter settings.

● Temperature, Line Pressure and AtmosphericPressure Sensors provided. Compensation
features realize higher accuracy.

● Various Hold functions• The sensors canbe calibrated.

• “Direct Hold”, “Max Value Hold”, “Min Value Hold”,
and “Peak-to-Peak”● Test parameters and results can be output
to the USB memory.

●FTP Function

Test results can be directly output in CSV format.

Share the quality data via Ethernet.

Parameters

Quality data stored

IP Address
Subnet Mask
User Name
Password
FTP Directory

FTP parameters

DF-R280-985B1-C■ Features
Color LCD
Touch-ScreenFrom the Main Menu, sub menus “MeasureScreen”,“Settings”, ”System”, ”Comp”,”Analysis”, etc. are accessible.

Language

English, Japanese, Chinese

Measure Screen

Can be selected from “Advanced”,“Waveform”, and “Simple”.

Flow Range

10 mL/min to 500 L/min

Settings

Tap the items on the touch screen.

SensorFlow Limits

Two sets of leak limits:
Upper limits (UL2/UL), Lower limits ( LL2/LL)

Conversion
Temperature

0 °C, 15 °C, 20°C, 25 °C, (70 °F)

Flow Display

Converted flow rate
(Value converted to volume at 1 atm atconversion temperature)

Digital Filter

The filter constant (1 to 50) averages thedisplay values which gives stablermeasurement.

USB Port

Provided as standard (1 port)

User Span

Adjusts to desired flow rates.

RS-232C

2 ports as standard
Compatible with DF-2820

Internal memory

16 G for Ethernet (Option)■ Specifications
Flow Sensor

Laminar Flow Sensor (Laminar Flow Tube)

Pressure Media Air
Flow Range

Up to 16 ranges for 8 Laminar Flow Tubes

Atmospheric Range: 700 to 1200 hPa
Pressure Sensor Accuracy: ± 0.5% of F.S. + 1digit
Line PressureSensor

Proof Pressure 50 kPa or less: F.S. Range x 10
100 kPa or more : F.S. Range x 2
Accuracy: ± 0.2% of F.S. + 1digit

Number ofChannels

100 channels (0 to 99)

Flow Unit

Power Source
OptionLine Pressure
Compensation

Automatic compensation with pressure sensor

Atm Pressure
Compensation

Automatic compensation with atmosphericpressure sensor

OperatingTemperature

5 to 45 °C

Humidity
Differential Pressure
Port Size
WeightDimensions (mm)mL/min, L/min, mL/s, L/s, L/h, m /h, (CFH, CFM)
The units in ( ) are not available for SI unit models.

RS-232C

kPa, MPa, (PSI, kg/cm , Bar, mbar, mmHg, cmHg,inHg, mmH2O)
The units in ( ) are not available for SI unit models.

Flow rate + Line pressure

Internal memory

16 G (For FTP)

Rc1/8Approx. 8.2 kg(W) 283 x (H) 189 x (D) 382

USBLANInterface

Data calling and writing

DF Format (Various data)
Fixed length output 28 Format
Same format as for DF-2800
Baud rate (bps)

100 to 240 VAC ±10%, 50/60 Hz,100 VA max
Select 125 V or 250 V
Analog Output

80 % RH or less / No dew condensation

Two-waycommunication

32Pressure UnitTemperature Sensor, Line Pressure Sensor
and Atmospheric Pressure Sensor provided
as standard.

1200, 9600, 19200, 38400,57600, 115200

Data storage, writing, backup, etc.
FTP installed
Phoenix Contact (DFMC 1,5/20-ST-3,5-LR)

Quick Mounting Brackets, Connectors, Inspection
record, Traceability documents, Operation manual,Standard Accessories
Power cord, Fitting/Piping for connecting
differential pressure■ Model DF-R280-A.BBʻCD-E-F (Conversion temperature, Flow range・Unit, Accuracy, Line Pressure Sensor)
Classification
ABBʼ

Number of Laminar
Flow Tubes
Laminar Flow TubeRange

See the “Flow Ranges” below for flow ranges.
For 1 L/min or above ranges:
2-range calibrations (L Range and U Range) are available.

CLine PressureSensor(The price for the calibration of L Range will be charged separately.)
Ranges of Line Pressure Sensor
10 kPa, 50 kPa, 100 kPa, 500 kPa, -100 kPa* Please contact us for other ranges.
UX3 in preparation *1

DEFOption

Unit (Mandatory)

Power Cord

Code
1 to 810ML to 500L

Function
Number of Laminar Flow Tubes
Enter all the ranges.

L01

1 to 10 kPa

L05

10 to 50 kPaL

10 to 100 kPa (Standard)M

30 to 500 kPaV-10 to -70 kPa

A

Analog output (Flow, Line pressure)

D

Memory 16 G (For FTP)

UX1

SI units (Mandatory for Japan)

UX2

All units (Only for overseas)

UX3

All units (Only for UL) *1

VA

125 V (3 m)

VE

250 V (2 m)

VK

250 V (2 m) (Only for Chinesecustomers)

DF-R280-985B1-C

Laminar Flow Sensor (Laminar Flow Tube)
Select from many ranges. F.S.10 mL/min to 500 L/min
Can measure pulsating flow such as pump discharge flow.
Same performance as the flow sensors used in the conventional DF-2820/2810.
Robust and durable with no moving parts.

■ Flow Ranges (Laminar Flow Tube are sold separately)
CodeModelLine pressure(Max.)

Ranges and number of display digits

10ML

LF-104N-10C

0.00 to 10.00 mL/min

20ML
50ML
100ML
200ML
500ML

LF-104N-20C
LF-104N-50C
LF-104N-100C
LF-104N-200C
LF-104N-500C

0.00 to 20.00 mL/min
0.00 to 50.00 mL/min
0.0 to 100.0 mL/min
0.0 to 200.0 mL/min
0.0 to 500.0 mL/min

CodeModel

1-range (F.S) accuracy
range & Display digits

L Range & D isplay
digits

990 kPa

Accuracy range (R.D.)
U Range & D isplay
digits0.300 to 1.000 L/min
0.600 to 2.000 L/min
1.500 to 5.000 L/min
3.00 to 10.00 L/min
6.00 to 20.00 L/min
9.00 to 30.00 L/min
15.00 to 50.00 L/min
30.0 to 100.0 L/min
60.0 to 200.0 L/min
150.0 to 500.0 L/min

Accuracy
At atmospheric pressure:±1.0 % of F.S.±1 digit
At Line pressure:±1.5% of F.S.±1 digit

Line pressure(Max.)

Accuracy

1L
LF-104N-1L
0.000 to 1.000 L/min
0.000 to 0.300 L/min■ 1 range (R.D) / U Range
2L
LF-104N-2L
0.000 to 2.000 L/min
0.000 to 0.600 L/min
700 kPaAt atmospheric pressure:
5L
LF-104N-5L
0.000 to 5.000 L/min
0.000 to 1.500 L/min±1.0 % of rdg. ±1 digit
0.00 to 10.00 L/min
0.000 to 3.000 L/min
10L
LF-104N-10L
At Line pressure:
500 kPa±1.5 % of rdg. ±1 digit
20L
LF-104N-20L
0.00 to 20.00 L/min
0.000 to 6.000 L/min■ 1 range (F.S.) / L Range
30L
LF-104N-30L
0.00 to 30.00 L/min
0.000 to 9.000 L/min
At atmospheric pressure:
50L
LF-105BN-50L
0.00 to 50.00 L/min
0.00 to 15.00 L/min
350 kPa±1.0 % of F.S.±1 digit
100L LF-105BN-100L
0.0 to 100.0 L/min
0.00 to 30.00 L/min
200 kPa
At Line pressure:
200L LF2-200L
0.0 to 200.0 L/min
0.00 to 60.00 L/min
50 kPa±1.5 % of F.S.±1 digit
500L LF2-500L
0.0 to 500.0 L/min
0.0 to 150.0 L/min
Note 1: The above ranges are the flow ranges at atmospheric pressure.
Note 2: For the Laminar Flow Tubes whose model name has “N” in it, new temperature sensor connectors are being used from April 2011.
Note 3: For single range (1 range) Laminar Flow Tubes of 1 L/min or above, the accuracy of “0 to full range (F.S.)” or “30% to full range (R.D)” can be selected.
Note 4: For Vacuum and High Line Pressure (101KPa or more) models, the range of Laminar Flow Tube will be different.
Note 5: When the range is 10C, the value of small flow fluctuates due to the relational equation with the pressure.
Use a smaller number of display digits in that case.

■ Option

Analog OutputDF-2820 compatible cable
CX-R241

CX-R150

Analog values of flow and Line pressure

DF-R280 => DF-2820

Internal memory 16 G (for FTP)

DF-2820 => DF-R280

Can amplify up to 10 V

Can be viewed■ External Appearance* The contents in this Product Information are as of January 2022. The specifications are subject to change without prior notice.

Cosmo Instruments Co., Ltd.

2974-23 Ishikawa, Hachioji, Tokyo 192-0032 Japan
China: Cosmo (Shanghai) Trading Co., Ltd.
+86-(0)21-6575-6880
Shanghai, Tianjin, Guangzhou, Chongqing, Changchun, and Wuhan
Korea: Cosmo Korea Co., Ltd.
+82-(0)32-623-6961
Taiwan: Taiwan Cosmo Instruments Co., Ltd.
+886-(0)2-2707-3131
Malaysia: COSMOWAVE SDN.BHD.
+60-(0)3-51626677
Thailand: Cosmowave Technology Co., Ltd.
+66-(0)2-7361667
Indonesia: Pt. Cosmowave+62-(0)21-42900043
Vietnam: Cosmowave Technology Co.,Ltd. Vietnam Representative Office+84-(0)47876085

http://www.cosmo-k.co.jp/
Phone: +81-(0)42-642-1357 Fax: +81-(0)42-646-2439
India: Cosmo Instruments India Pvt. Ltd. Head OfficeCosmo Instruments India Pvt. Ltd. South Zone Regional OfficeCosmo Instruments India Pvt. Ltd. Pune - Chakan OfficeCosmo Instruments India Pvt. Ltd. - Chennai Office
Germany: Cosmo EU Solutions Technology GmbH
USA: Cosmo Solutions Technology, Inc.
Mexico: Cosmo De Mexico
Brazil: Tex Equipamentos Eletronicos Ind. Com. Ltda.
Australia: Industrial Research Technology Pty. Ltd.

+91-(0)124-421-0946+91-(0)9663384423+91-(0)20-6933-2345+91-(0)9994364454+49-(0)212-383671-71+1-248-488-2580+52 472 748 62 94+55-(0)11-4591-2825+61-(0)412-176-674

DF-R280-985B1-C