External clamp flowmeter

project

Performance and parameters

Measurement host (primary meter)

accuracy

1%

repeatability

0.2%

Maximum flow rate

64m/s

Measurement period

200mS (5 times per second, 128 sets of data collected per cycle)

measuring principle

Ultrasonic Time Difference Principle, 4-byte IEEE754 Floating Point Operation

display interface

Connectable2 × 10 backlit Chinese characters or 2 × 20 character LCD display

operate

External 16 key touch keyboard and PC computer parameter software

input

3-channel 4-20mA input is optional, with an accuracy of 0.1%. It can input signals such as pressure, liquid level, temperature, etc., and can also be used as a digital interface.

Two way three wire PT100 platinum resistor input circuit, capable of achieving heat metering function (enthalpy difference method)

output

Current signal (optional module): 4~20mA, impedance 600ΩFloating, with an accuracy of 0.1%.

Frequency signal (optional module): Choose between 1~9999Hz, OCT output.

Pulse signal: positive, negative, net flow and heat accumulation pulses, dual OCT output (with one pulse width programmable between 6-1000ms, default 200ms).

Alarm signal: Dual OCT output, with up to 20 selectable source signals.

Data interface: Isolated RS485 serial interface.

Communication protocol

MODBUS protocol, MBUS protocol, FUJI extension protocol (compatible with communication protocols for flow meters and water meters of Huizhong Company), it is recommended to use MODBUS-RTU protocol or MODBUS-ASCII protocol

Other functions

Automatically remember the accumulated traffic and work status of the previous 64 days, 32 months, and 2 years; Automatically remember the first 16 power on/off times and flow rate, and can achieve automatic or manual replenishment;

Programmable quantitative controller (can be started using external input signals or MODBUS commands);

One bidirectional serial interface can connect multiple external devices such as 4-20mA and data loggers;

The working parameters can be fixed in the FLASH memory inside the machine and automatically retrieved when powered on;

Users can upgrade software by sending code files via email

Fault self diagnosis function.

Fault time timer.

Working current

50mA (without connecting keyboard display and buzzer not sounding)

Stand-by current

Using CR2032, maintain 100000 hours of data without loss under 24VDC power outage conditions

ambient temperature

-10℃~70 ℃ (please contact the manufacturer if the temperature range exceeds this requirement)

working hours

continuous

VERSION

WLV12

WLV13

WLV14

WLV15

power supply

24VDC

8~30VDC

24VDC

85~264VAC/24VDC

Size (mm)

Φ84

116×62

92×36

15095

sensor

External binding type

Standard S1 type, suitable for pipe diameter DN15~100mm

Standard M1 type, suitable for pipe diameter DN50~700mm

Standard L1 type, suitable for pipe diameters ranging from DN300 to 6000mm

High temperature S1H type, suitable for pipe diameter DN15~100mm

High temperature M1H type, suitable for pipe diameter DN50~700mm

Sensors from other manufacturers

plug-in

The material of the measuring pipeline is not limited (for non-stop installation) and is suitable for pipes with a diameter of DN80 or above.

Pipe section type

πType pipe segment: suitable for pipe diameterDN25~DN40， The measurement accuracy of the whole machine is ± 0.5%

Standard pipe section: suitable for pipe diameterDN50~DN1000， The measurement accuracy of the whole machine is ± 0.5%

signal cable

Special SEYV75-2 shielded twisted pair cable, factory standard 5 meters, can be extended up to 500 meters for specific occasions (not recommended).

protection grade

IP68 (capable of working in water immersion)

Measurable pipeline

Pipe

Steel, stainless steel, cast iron PVC、 Copper, aluminum, cement pipes, and other materials with dense texture are allowed to have lining.

Lining material

Epoxy asphalt, rubber, mortar, polypropylene, polystyrene, polyester, polyethylene, hard rubber, rubberwood, polytetrafluoroethylene.

inside diameter

15mm~6000mm（πThe inner diameter of the segmented pipe can be as small as 2 millimeters）

Length of straight pipe section

Upstream ≥ 10D, downstream ≥ 5D, distance from pump outlet ≥ 30D.

Measurable pipeline

type

Uniform liquids that can propagate ultrasonic waves, such as water, seawater, acidic and alkaline liquids, food oil, gasoline, coal, diesel, crude oil, alcohol, beer, etc.

turbidity

≦20000ppm， The sewage measurement results are good, and the vast majority of sewage pipelines can be stably measured.

temperature

-40℃~160℃

flow direction

It can measure the forward and reverse flow separately and measure the net flow.

sensor

Standard S1 type

Standard M1 type

Standard L1 type

High temperature S1H type

High temperature M1H type

Applicable pipe diameter

DN15-DN100

DN50-DN700

DN300-DN6000

DN15-DN100

DN50-DN700

liquid temperature

0℃～70℃

0℃～160℃