Product Specifications

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Ultrasonic Flow Meter for Fuel Gas(External Power Supply 24 VDC Type)

Ver. 5Model

1/3

UX [Nominal diameter] / 0DC /[Flow direction]

Specifications
 Nominal diameter

15 mm (UX15-0DC-L/R)
25 mm (UX25-0DC-L/R)

 Flow directionLeft to right(L),  Right to left (R)Flow-rate range
0.12 to 6 m3/h (Actual flow)(accuracy guaranteed range)
Accuracy

Flow measurement accuracy (Actual flow)± 2%RD (0.6 to 6 m3/h)± 0.5%FS (0.12 to 0.6 m3/h)
Simple NORMAL conversion accuracy ± 1.5%RD

Low flow cutoff

In case the measurement flow-rate is 0.024 ㎥/h or less, 0 ㎥/h is displayed for
instantaneous flow-rate.

Response-ability

Update interval: 0.5 second
Smoothing by moving average method (initial setting value: 4 times)

Display

Main display: The following is switched and selected using the “left button”.
Accumulated flow volume (m3)·Trip accumulated flow volume (m3)
Sub display: The following is switched and selected using the “right button”.
Instantaneous flow-rate (m3/h)·Set pressure (kPa) (gauge pressure)·Temperature (°C)

Number of digits displayed
Main display
Accumulated flow: Flow volume m3
Accumulated flow volume
Trip accumulated flow volume
Sub display

10 digits (00000000.00 m3)
9 digits (0000000.00 m3)

Instantaneous flow-rate : 5 digits m3/h
000.00 m3/h
(less than 1000 m3/h)
0000.0 m3/h
(1000 m3/h or more and less than 10000 m3/h)
00000 m3/h
(10000 m3/h or more)
Temperature: 3 digits (00.0°C)
Pressure: 5 digits (000.00 kPa)"" are selectable.

Pulse output

Open drain output 1 channelPulse unit
: 1000 L/P (Initial setting value) (Can be changed by button operation)(can be changed to 1, 10, 100, 1000 and 10000 L/P)
Maximum load
: 26.4 VDC·50 mA
Duty: 20 to 80%
Saturated voltage when ON : 1.5 V or lessCurrent when OFF : 50 A or lessMaximum frequency : 10 Hz

Product Specifications

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Alarm output

Ultrasonic Flow Meter for Fuel Gas(External Power Supply 24 VDC Type)

Ver. 5Model

2/3

UX [Nominal diameter] / 0DC /[Flow direction]

Open drain output 1 channel
Accumulated value upper limit alarm or Flow-rate upper and lower limit alarm (Either one isselected by button operation)
Accumulated value upper limit alarm
When the accumulated flow volume for 1 h becomes higher than the set accumulated
flow volume limit value, an alarm signal is output. (The accumulated flow volume upper
limit value can be set by communication.)*The 1 h measurement is started when the power supply is turned on.
Flow volume upper and lower limit alarm output
When the instantaneous flow-rate becomes higher or lower than the set flow-rate, analarm signal is output.
(The alarm output upper and lower limit flow volume and alarm judgment value
hysteresis width can be set by button operation.)
Current output
Output method: Discharge method
Output accuracy: ±0.1 mA for display value
Load resistance: 400 Ω or less
When instantaneous flow-rate is selected
Zero output current: 4 mA (reverse flow to low flow cutoff)
Output current upper limit: 22 mA (clip at 22 mA)
Full scale flow rate setting: 6 m3/h (settable)
When temperature is selected
Output method: 4 mA: -10°C, 20 mA: +60°C
Output current lower limit: 2 mA (clip at 2 mA)
Output current upper limit: 22 mA (clip at 22 mA)
Communication
Communication method : Half duplex communication method (RS485 communication)
Communication speed: 4800 bps, 9600 bps (Allowable range: ±1.0%)
Synchronization method : Asynchronous
Bit configuration: 8 bits, no parity, stop bit length 1 bit
Bit transmission order: Order from b1 to b7 (low order prioritized sending)
Error control: CRC*Register and download the detailed communication specifications from the following URL.
http://www.aichitokei.co.jp/products/14_s_sonic/ux/
Measurable fluid
City gas (13A), butane (butane 70%, propane 30%),
Propane (propane 98%, butane 2%), nitrogen
Working fluid temperature-10 to +60°C
Working pressure
0 to 100 kPa (Gauge pressure)
Working ambient temperature-10 to +60°C 90%RH or less (There must be no condensation)
Storage ambient temperature-20 to +70°C 90%RH or less (There must be no condensation)
Power supply
24 VDC (21.6 to 26.4 VDC) Power consumption: 2 W or less
Flow direction
The right to left or left to right to the display portion can be selected.. It must be determinedat the time of order placement and not able to be changed by a customer. (The direction
indicated by an arrow is the forward flow.)
Installation position
Horizontal or vertical (Cannot be installed with the position that the display portion faces
downward or the cable introduction portion faces upward)
Pressure drop
200 Pa or less (City gas 13A, standard atmospheric pressure +2.5 kPa, at maximum
flow-rate)
Protection structure
IP 64 (JIS C0920: dust-proof, splash-proof type) which can be installed outdoorsProduct Specifications

Reliability Creativity
Service

Ultrasonic Flow Meter for Fuel Gas(External Power Supply 24 VDC Type)

Ver. 5Model

3/3

UX [Nominal diameter] / 0DC /[Flow direction]

Mass

1.6 kgMaterial

 Measurement portion Engineering plastic (Such as PPS), aluminum alloy Outer casing Aluminum alloy
Display portion case Aluminum alloy* symbol indicates the gas contacting parts.

Standard working period

10 years(At ambient temperature of 20°C and ambient humidity of 65%RH)* 10 years is not the warranty period.

OthersCE marking, UKCA marking, RoHS Directive compliant2. Precautions in handling
2-1. Installation environment(1) Although the high weather-proof electronic display is adopted, in case of installation at a place subjected todirect sunlight, provide a sunshade.
(2) Do not install the flow meter at a place with much electromagnetic noise, in corrosive atmosphere, or withhigh humidity liable to cause dew condensation(3) This product is designed for outdoor installation, but avoid areas where there is a risk of water
submergence and water always splashes.
(4) The meters do not conform to ATEX (explosion-proof) directive (2014/34/EU).
2-2.

Piping conditions(1) In case large amount of dust, etc., are contained in the fluid, install the flow meter by vertical piping.
Even though the meter is installed indoor, it cannot be installed with the position that the display portion
faces downward or the cable introduction portion faces upward.