Gas turbine flow meters are mainly used for measuring the flow rate of medium fluids such as air, nitrogen, oxygen, hydrogen, biogas, natural gas, steam, etc. in industrial pipelines. When measuring the volumetric flow rate under working conditions, they are almost unaffected by parameters such as fluid density, pressure, temperature, viscosity, etc. No movable mechanical parts, therefore high reliability and low maintenance. The instrument parameters can be stable for a long time.

Main Features

(1)High precision, good repeatability, small pressure loss and good seismic performance;

(2)Use high-quality bearings, with small friction resistance, good sealing performance;

(3) Integrating a microprocessor, a flow sensor, a high-precision temperature sensor and a pressure sensor, directly measuring the flow rate, the temperature and the pressure of the measured gas, and automatically performing flow tracking compensation and compression factor correction operation;

(4)The instrument has pulse signal and analog signal output, and can directly realize centralized collection and real-time management of computer data through RS485 communication interface or GPRS system.

(5)Low power consumption, internal battery power supply or external power supply;

(6)It has a real-time data storage function, which can prevent data loss during battery replacement or sudden power failure. In the power failure state, internal data can be stored permanently.

(7)It can be used with IC card prepayment system to facilitate trade settlement.

Technical Performance

Accuracy Class

Class 1.0: qmax-0.2max ±1.0% 0.2max-min ±2.0%

Class 1.5: qmax-0.2max ±1.5% 0.2max-min ±3.0%

Products that are not specially marked shall be delivered in accordance with Class 1.5 precision. For other precision, special instructions shall be required for customization when ordering.

Model, specification and basic parameters of flowmeter

product-661-784

Conditions of Use
1.Standard condition: P=101.325kPa T=293.15k
2.Conditions of use:
A.ambient temperature:-25 ~+80 ℃
B.medium temperature:-20 ~+60 ℃
C.relative humidity: 5-95%
D.atmospheric pressure: 86 kpa-106 kpa

Electrical Performance Indicators

Working power supply
A.Internal instrument power supply: 1 3.6VDC lithium battery, which can work normally when the battery voltage is 3.1 ~ 3.6 v;
B Internal GPRS power supply: a 6.6VDC lithium battery, which can work normally when the battery voltage is 5.0 ~ 6.6 v;
C.External power supply:+24 VDC 15%, ripple ≤ 5%, suitable for 4 ~ 20ma output, pulse
output, RS-485, etc.
D.External power supply (solar energy) GPRS power supply:+5vdc--+7vdc.

Pulse Output Mode
1)Base meter pulse signal: (used for calibration of instrument):
Directly outputting the original pulse signal of the base meter detected by the flow sensor through an amplifier, wherein the high level is more than or equal to ≥20V and the low level
≤1V.
2)Modified working condition pulse signal (or standard volume flow):
Set by software, the default is the volume flow pulse output of the modified working condition, with amplitude values of: high level ≥20V and low level ≤1V.
3)Equivalent Pulse Signal (for IC Card Controller Input):
A.TTL output amplitude is 0 ~ 3v, output pulse width ≥50ms. B.OC output.

Current Output:
4 ~ 20mA Standard Analog Current Output Function
It is directly proportional to the standard volume flow rate, 4mA corresponds to 0 Nm3/h, 20mA corresponds to the maximum standard volume flow rate (this value can be set).
The output form is: two-wire system

RS485 Communication
Through the internal RS485 standard interface, it can be connected with host computers such as personal computers and PLC for serial communication. It can display medium pressure, temperature, instantaneous flow rate, accumulated standard flow rate, battery voltage, etc.

Working Status

product-537-300

1.Total: Cumulative flow, the display value can retain 4 decimal places, the maximum value is 9999999999; when the display display condition accumulates, m3 will be displayed. When the display shows the accumulated condition, m3 will not be displayed.

2.oper. flow: The displayed value is kept at least 3 decimal places, and the maximum value is 9999m3/h;

3.Std. flow: The display value is a minimum of 3 decimal places, and the maximum value is 99999Nm3/h;

4.Pressure: The displayed value is a minimum of 3 decimal places. The maximum value is 9999. The unit has Kpa for selection. The pressure range is 0-20000Kpa (gauge pressure). When this range is exceeded, the pressure will flash.

5.Temperature: The displayed value range is -50 °C - 300 °C. Outside this range, the temperature (Temp) will flash;

6." Runs the power mode display, provides a battery power prompt, and displays the battery level.