Instrument Name: Comprehensive Testing System for Water Pump Performance

Instrument model: VG-3X

Characteristics: 1. Parameters and Requirements

IIequipment

1. Test power supply: Voltage regulators, variable frequency power supplies, delta star autotransformer step-down starters, thyristor soft starters, etc. can be selected.

2. Special distribution panel for testing: It contains three-phase precision current transformers (0.2 level) and multi speed electric control switching for current division.

requirement:

1) Display table for main power supply current and voltage of water pump;

2) Emergency stop button;

3) Experimental grade precision current transformer;

4) Reliable brand contactors and other electrical components.

3. Test bench, which can be embedded with secondary instruments, computers and other equipment

1) Control panel function buttons

•Main pump start and stop buttons;

•Start and stop buttons for vacuum pumps or booster pumps;

•Emergency stop button;

•Selection switch for forward and reverse rotation of water pump;

•Multi level current transformer switching knob.

2) Status signal light

•The normal operation signal light (green) and stop signal light (red) of the water pump;

•Vacuum pump or booster pump start/stop signal light;

•Signal light for forward and reverse rotation of water pump (green light for forward rotation and red light for reverse rotation);

•Current transformer gear display light.

3) Monitor

•Multi functional pump parameter measuring instrument (can be divided into several instruments);

•Industrial computers and 17 inch LCD displays.

4) Intelligent speed and flow measuring instrument (model: SFT-A)

•Two windows display simultaneous measurement of motor speed and pump flow rate. Window 1 has a speed measurement display function, while Window 2, in conjunction with flow sensors equipped with frequency outputs such as turbines, electromagnetic flow, etc., measures flow frequency differences, liter/second flow rates, ton/hour flow rates, and converted rated speed flow rates.

•Speed measurement accuracy ± 0.1%

•Equipped with RS232C interface

5) Intelligent Pressure Head Tester (P-H)

•The instrument is equipped with a 4-20mA output pressure transformer, which can measure and display the pressure of both the inlet and outlet channels. The unit can be switched between Mpa, kPa, kgf, and M (meters of water column) for display. Instrument measurement accuracy ± 0.1%

•Equipped with RS232C interface

6) Single and Three Phase Electrical Parameter Measuring Instrument (GDW3001A)

•Measurement range: voltage (500V), current (40A), power, power factor, frequency

•Function: Three window conversion display, locking, printing, communication, voltage and current change settings

•Features: Designed with powerful dedicated chips, especially suitable for situations with poor input waveform

IIIsystem software

1. Pump testing types: submersible pump testing, pump performance testing, pump turbidity testing, submersible pump testing, positive displacement pump testing, well submersible pump testing, positive displacement pump turbidity testing.

2. Testing method:

•Electrical measurement method for measuring unit efficiency

•Measurement of pump efficiency using actual measurement method

•Calculate efficiency from motor curve

3. Rich parameter setting functions:

1) Product design parameters: including design point flow rate, design point head, design point efficiency, large flow point flow rate, large flow point head, large flow point efficiency, small flow point flow rate, small flow point head, small flow point efficiency, ideal point flow rate, full pressure of positive displacement pump, rated speed, speed transmission ratio, and setting of steam turbidity margin parameters.

2) State parameter settings: including inlet pipe diameter, outlet pipe diameter, inlet gauge difference, outlet gauge difference, atmospheric pressure, room temperature, pump stage, and sampling frequency parameter settings.

3) Test method setting:

•Flow sensor selection: (electromagnetic flowmeter, eddy current flowmeter, orifice plate differential press), range, turbine coefficient, orifice plate coefficient.

•Pressure sensor selection: (positive and negative gauges for differential pressure gauge, differential pressure sensor, outlet pressure sensor, positive and negative gauges for outlet pressure gauge, positive and negative gauges for differential pressure gauge), inlet pressure range, outlet pressure range.

•Power testing methods: (electrical measurement method, torque method), (single-phase motor, three-phase motor), current rate, motor curve, sensor calibration temperature.

•Speed testing method: (automatic measurement, manual measurement)

4. Humanized testing interface: including key functions such as parameter screen display, stop, sampling, insertion sampling, resampling, deletion, calculation, data display, motor power calculation, and data processing.

5. Data processing interface: Basic information settings include manufacturing unit, report number, test time, pump model, pump number, room temperature, water temperature, atmospheric pressure, gauge difference, inlet pipe diameter, outlet pipe diameter, pressure range, current rate, rated power, rated speed, flowmeter coefficient, etc.

6. Error analysis function of the test bench: including average value, percentage error (%), random error (%), systematic error (%), and total error (%).

7. Enter the "Curve Fitting" function

•Curve types: performance curve, turbidity curve, two curves.

•Discrimination type: Cross line discrimination, non discrimination, etc.

•Level: (Level 1, Level 2, Custom, Level B, Level C).

•Open data and import the data to be fitted.

•Open the data file and search separately by product number, product model, and testing date.

8. Perform curve fitting on the exported data and draw pump performance curves (H-Q, H-Q, P-Q) or cavitation curves (NASH-Q).

9. Print curve reports, accuracy analysis reports, and print English curves.

10. Draw current curves and compare graphs.