OUTLINE

RF2000 is a system that measures the air flow velocity to the engine

radiator. The rotation frequency of a propeller sensor is measured

by an infrared sensor attached to the propeller sensor. The signal

from the infrared sensor is transmitted via an electrical cable to

a converter for measuring the radiator air flow velocity and then

converted to air flow velocity. A single conver ter can measure

air flow velocity at 16 channels. The converter is also equipped

with functions for displaying the air flow velocity and frequency,

outputting an analog voltage, and performing RS-485 and CAN

communication.

For RS-485 communication, up to four converters can be connected

to enable simultaneous data collection on a ma ximum of 64

channels. Furthermore, the dedicated measurement software TIC

Wind-LV can be used to set the measurement interval and number

of measurements, to collect air flow velocity data, and to output an

average value for the air flow velocity. Converter settings can be

changed from a computer.

For CAN communication, up to four converters can be connected to

enable collection of air flow velocity data. Also, driving tests can be

performed by mounting the entire system in a vehicle.

FEATURES

❑ Compact sensors

A thin and light-weight sensor with thickness of only 10 mm

can be installed at a narrow space such as between a radiator

and condenser.

❑ Accurate directional measurement

The propeller sensor with its axis aligned parallel to the air flow

direction, allows accurate measurement of the flow velocity

along the perpendicular to the radiator, neglecting the flow from

the other directions. Other types of sensor such as thermal type

or pressure type tends to measure flow from all other directions.

❑ Low pressure loss

The pressure loss caused by the propeller is approximately 0.1

kPa (at the velocity of 20 m/s). This is very small when compared

to the pressure loss of the radiator.

❑ Connected to electric cables

Electric cables used to connect the propeller sensors and

converter are flexible, resistant to low temperatures, and are

easier to handle compared to optical fiber cables.

❑ More channels

One unit of the RR5000D/RR5100D is capable of measuring 16

channels.

❑ RS-485

Four converters connected in a daisy chain can simultaneously

collect data from up to 64 channels. The settings of the converters

can be changed from a PC.

❑ CAN communication

Four converters connected in a daisy chain can simultaneously

collect data from up to 64 channels. The communication data are

transformed to air flow velocity values based on the DBC file.

Radiator air flow measurement system

RF2000

RR5000D/RR5100D Converter for Infra-

red Sensors

RF2000 SYSTEM SPECIFICATIONS

(1) Converter

RR5000D/RR5100D converter for infrared sensors

Power supply 12 to 24 V DC

±10%

Display

2 lines in a LCD

Measuring channel, air flow velocity and frequency

Operation

key

CH UP, CH DOWN, SHIFT, INC., ENT., and MOVE total 6

Setting

function

Low level cut-off, Moving average, Air-flow conversion

factors, Full scale air flow velocity, Linearize setting, Start

channel setting，End channel setting，Display update cycle,

RS-485 communication unit address/ID address, CAN

communication speed

Analog

output

0 to 5 VDC, 16 channels

Load resistance 100 k

Ω or more

Accuracy

Frequency conversion accuracy:

± 1 Hz

Analog output accuracy:

±0.6% of the reading ±0.01V

(Based on display value)

Communi-

cation

RS-485 and CAN communication functions

Temperature

range

5 to 60°C

(2) Vane anemometer (propeller sensor)

RS-1050-IR/RS-1150-IR infrared sensor

Form

Dimension : Approx. 69 mm including lugs for installation,

Five vanes

Cable length : 6 m

Measuring

range

0.4 to 30 m/s

Accuracy

±(1% of reading + 0.05 m/s) at the range of 0.4 to 20 m/s

Temperature

range

-40 to 120°C Without condensation of moisture or freezing

(Maximum continuous operating temperature is 100°C)

RS-1038-IR/RS-1138-IR infrared sensor

Form

Dimension : Approx. 42 mm including lugs for installation,

Five vanes

Cable length : 6 m

Measuring

range

0.5 to 30 m/s

Accuracy

±(1.5% of reading + 0.05 m/s) at the range of 0.5 to 20 m/s

Temperature

range

-40 to 120°C Without condensation of moisture or freezing

(Maximum continuous operating temperature is 100°C)

(3) Communication and data processing software “TIC Wind-LV”

RW2000 (Dedicated for the RF2000)

System

requirement

Windows 7 SP1 or later operation systems

Communi-

cation

RS-485

Function

The air flow data for each channel is collected.

Data are measured multiple times (1 to 99999 times) at a

fixed time interval (1 to 9999 seconds) and recorded in a

CSV file. Parameter settings in the converter are changed.

TG-F1123-E04

5th edition Nov 2020 K

1st edition Jul 2015 K