INDICATION AND OUTPUT OF FLOW RATE, TOTALIZATION AND ALARM,

MIDDLE TO LARGE CONNECTION AND HIGH FLOW RATE MEASUREMENT VERSION

TF-2261T ALL-IN-ONE

MINI THERMAL MASS FLOWMETER

■ OUTLINE

The TF-2261T can handle larger flows than flowmeters with medium

to large connection sizes among the TF-2000 series mini thermal

mass flowmeters.

TF-2261T has LCD indication of flow rate and totalization. Also,

functions of scaled output pulse and DC4 to 20mA are provided.

Furthermore, two-point field adjustable alarm contacts are provided.

TF-2261T can be operated by DC24V power supply.

■ FEATURES

❏ Wide range of process connection for high flow rate

Connections of 25mm to 80mm are available. They are useful

with the extensive use in Air and Nitrogen supply lines etc.

❏ Simultaneous indication of flow rate and totalization

Large two-line LCD is provided.

❏ Output of current, pulse and alarm functions are provided.

Remote indication, batch processing and safety operations are

achieved by one unit.

❏ Mass flow measurement

Flow measurement is not influenced by the change in pressure

and temperature.

❏ Excellent in durability

Excellently durable sensor supported by old know-how is used.

❏ Whole quantity passage detection system

Pressure loss is very small.

❏ High speed response

High pressure response - 90% within one second

❏ Selection up to six scale ranges can be made.

Up to 6 scale ranges can be preset using keys.

■ STANDARD SPECIFICATION

■ FULL SCALE AND PRESSURE LOSS

Meter size

Full scale m3/h (nor)

Pressure loss (kPa) (✽)

25mm（1"）

Min.

80

32

Max.

160

32mm（1-1/4"）

Min.

150

39

Max.

300

40mm（1-1/2"）

Min.

200

38

Max.

400

50mm（2"）

Min.

300

32

Max.

600

65mm（2-1/2"）

Min.

500

33

Max.

1000

80mm（3"）

Min.

700

35

Max.

1500

✽ Pressure loss (at 1atm, 25°C) at the time of maximum full scale; The rough value

of the pressure loss is proportional to the square of flow rate and is in inverse

proportion to the pressure.

Fluid

Air, Nitrogen

Rangeability

1 : 20 (std.)

Gas press.

– 0.07 to 1.0MPa

Gas temp.

0 to 50°C

Temp. change effect

Within Span:

±0.1%F.S./°C

Press. change effect

Within

±0.1%F.S./0.1MPa

Response

1 sec. for 90%

Finish

Housing: Munsell N8.5

Stainless body not painted

Construction

Waterproof (Equiv. to IP65)

Installation

Horizontal or Vertical (✽)

Ambient temp.

0 to 50°C

Cable connection

2

× G1/2 (Terminal: M3 screw)

Power supply

DC24V (DC22V to DC27V)

Consumption

Installation & flow directions: Horizontal and Left to Right (standard)

set up at factory

Approx. 5.5W

Process connection

Screw: Rc (1" to 2")

Flange: JIS10K (25 to 80mm)

Material

Tube: SUS304 or SUS316

Sensor: Combination of SUS316, Glass, CTFE,

and PT

Seal: FKM

Housing: AC2A

Scale range

Min. 0 to 80m3/h (nor) / 25mm (1")

Max. 0 to 1500m3/h (nor) / 80mm (3")

Indication

Flow rate : 4 digits LCD Height: 13mm

Totalization: 7 digits LCD Height: 6mm

Low cut-off

Std. 5%F.S. (Adjustable)

Flow rate, Totalization, Current output, & Pulse output

Output

Current output

: Accuracy

±2%F.S.

DC4 to 20mA

(Load resistance: 450 ohms or less)

Pulse output

Output

: Open collector

Rating

: DC30V 30mA Max.

Pulse width

: (Approx.) 100ms fixed

Pulse rate

: Synchronized with pulse count

Flow rate alarm output

Output

: Open collector

Action

: “ON” when operating

(With Red LED for operating confirmation)

Rating

: DC30V 30mA Max.

Setting

: Push key at front panel

No. of points

: 2 points (H + L alarm)

Setting accuracy:

±1.0%F.S.

Setting range

: 0 to 100% of F.S.

Hysteresis

: 1%

±0.5%F.S.

Data backup

Setting of parameter and totalizing value is memorized

by EEPROM. (Retaining: For 10 years)

Accuracy

Flow rate :

±2%F.S. ±1dig.

Totalization:

±2.1%F.S.

Totalizing count: 60 to 18000c/h

TG-F1154-E00

Mar 2018

1st edition

K