LWZQ Intelligent Gas Turbine Flow Meter

A flow meter consists of two parts: a gas turbine flow meter base meter and an accumulator,The base table includes important functional components such as the body, rectifier, turbine, temperature sensor, magnetic switch sensor, pressure sensor, etc.When the fluid flows into the flowmeter, it is rectified and accelerated by an integrated two-stage rectifier, and then acts on the turbine blades at a certain angle to the flow direction. Under the action of fluid, due to the angle between the turbine blades and the fluid flow direction, the turbine generates rotational torque, which begins to rotate after overcoming the resistance torque and friction torque. When the torque reaches equilibrium, the rotational speed remains constant, and the angular velocity of the turbine is linearly related to the flow rate. By utilizing the principle of electromagnetic induction, a rotating turbine drives the top magnetic field of the signal generator to periodically change its magnetic resistance, causing a corresponding change in the magnetic field, thereby inducing a pulse signal proportional to the fluid volume flow rate. The signal is amplified by a preamplifier, shaped, and input into the flow integrator along with the pressure and temperature signals detected by the pressure sensor and temperature sensor for calculation. It is then converted into a flow value and directly displays the standard instantaneous volume flow rate and total volume.Can output pulse signals for working conditions and standard conditions4-20mA、RS485、ICMultiple signals such as card signals.The instrument adopts built-in lithium battery and external 24V DC supplyDual power supply mode,When the user does not require any output signal function, there is no need to supply the instrument with 24VDC external power. The instrument automatically switches to the built-in lithium battery power supply, and the battery can work continuously for more than 3 years. The explosion-proof rating of this flowmeter is ExdibIICT6 Gb.

1. Implement GB/T 18940-2003, JJG1037-2008, GB/T 21391-2008 and all relevant standards referenced therein

2. Nominal diameter: DN15 to DN300

3. Nominal pressure: 1.6MPa to 6.4MPa

4. Medium temperature: -30 ℃~+85 ℃, ambient temperature: -30~+65 ℃, relative humidity: 5%~95%, atmospheric pressure: 86~106KPa

5. Accuracy: ± 1.0% (Qmin~0.2Qmax ± 2.0%); 0.2Qmax～Qmax±1.0%），±1.5%（Qmin～0.2Qmax ±3.0%； 0.2Qmax～Qmax±1.5%）

6. Repeatability: better than 0.2%

7. Explosion proof rating: ExdibIICT6 Gb;

8. Shell material: aluminum alloy, stainless steel (1Cr18Ni9Ti), protection level: IP65

9. Power supply mode

a. (Internal power supply) Battery power supply: 3.6V lithium battery power supply, static current less than 45uA, allowable operating voltage range DC (2.8-6) V.

b. (External power supply 1) DC24V: two-wire power supply, allowable range DC18V~DC30V.

10. Input signal:

a. Flow signal: (0-1500) Hz; (Pulse amplitude of 3V)

b. Temperature signal: -35 ℃~+125 ℃ (PT1000 platinum resistance, accuracy: ≤± 0.5%)

c. Pressure signal: 0MPa~4MPa (accuracy: ≤± 0.5%)

11. Output signal:

a. 4-20mA standard current: analog current converted from flow rate displayed by flowmeter

b. IC card pulse signal: 1m3 or 0.1m3 corresponds to one pulse (for IC card controller)

c. Battery undervoltage alarm signal: usually high level, low level when battery undervoltage alarm occurs

d. Flow alarm signal: When the instantaneous flow rate is lower than the set value, it is low level, and normally it is high level

12. Communication interface and protocol: RS485/RS232, MODBUS-RTU protocol

13. Electrical protection

a. Dual isolation of internal power supply: The DC24V power supply terminal is isolated from the chassis and internal processing circuit, and can withstand a one minute impact of DC500V.

b. The DC24V power supply terminal is resistant to strong interference shocks of ± 500V and 10ms.

c. RS485/RS232 communication is isolated from the DC24V power supply terminal and the chassis, and can withstand a one minute impact of DC500V.

d. The DC3.6V power supply terminal can prevent misconnection of ± 24V power supply and withstand strong interference impact of ± 500V for 10ms.

e. The RS-485 communication port has transient voltage suppression function, lightning protection, and anti-static discharge impact resistance.

f. The two-wire current circuit can withstand strong interference shocks of 500V and 10ms.

After sales specialist responsibility system/Each after-sales engineer has undergone strict technical training, and we provide the following services:

1. Technical consultation: Accept phone inquiries at any time, answer customer questions and provide guidance, ensure customers choose instruments correctly before sales, and ensure smooth operation of instruments after sales.
2. Product service: The product warranty period is twelve months from the date of sale. During the warranty period (excluding human factors), our company is responsible for free repair or replacement; At the end of the warranty period, our company is responsible for repairing and collecting production costs.
3. On site debugging and maintenance: respond within 1 hour according to customer requirements; Provide on-site services within 24 hours or as agreed upon by both parties based on actual needs. For engineering supporting products, our company arranges dedicated personnel for on-site technical support as needed.
4. Regular Follow up: According to the service area division, the after-sales engineer conducts regular telephone visits every 3 months to understand the operation of the instrument, answer technical questions during product use, and record and archive the follow-up content.
5. User Profile: From the date of shipment, establish a user profile and product technical profile. Responsible by regional service engineers to ensure the normal operation of each instrument.
6. Spare parts: Service engineers recommend spare parts to users based on the on-site instrument conditions to ensure timely supply.
7. Personalized service: Our company provides personalized services based on customer needs.