PQWT Multi-Channel Underground Water Detector Operating Procedures And Instructions

1、Wiring

Straight line wiring in the area to be measured, according to the selected number of measurement points to place the cable length and electrode rods, keep the electrode rods and cable contact is good, the electrode grounding normal. The number of measurement points = electrode rods - 4, when you need to measure 10 measurement points, you need to place 14 electrode rods. The host collects data from the center of the M and N poles, the center of M1 and N1 is the first measurement point P1, i.e. the position of the third electrode rod, the center of M2 and N2 is the second measurement point P2, i.e. the position of the fourth electrode rod, and so on. Up to 18 points can be measured synchronously at one time.

2、Parameter Setting

Power on the instrument into the operating interface, the first step, line detection, measuring line connected to the host. Long press the line detection light, observe the line indicator at the bottom of the screen, all the indicator lights indicate that the line is normal. The second step, click on the profile and then click on the measurement parameter settings, measurement line number settings; each place must be measured to replace the measurement line number, such as the first line measured, measured the next one will have to change the measurement line 1 into the measurement line 2, and then change the place to change the measurement line 3, and so on. Step 3: Points setting, according to the actual number of connected electrode rods minus 4 is the actual number of measurement points, such as only 20 electrode rods inserted, the actual number of measurement points is 20-4 = 16 points. Step 4: Depth setting, click depth, adjust to the corresponding depth you need to measure. (The increment and point number in the interface of the instrument generally do not need to be set, and the gain is normally defaulted to 0.)

3、Acquisition of data

Parameter settings are complete, click OK, and then click on the collection to start collecting data, the bottom of the screen has a blue progress bar shows that there are beeps to indicate that the collection of data is complete, respectively, click on the screen graphs, profiles, 3D graphs, and auxiliary analysis, you can view the results according to the actual situation of the results you want to see the map and analyze the results of the measurements on-site.

4、Re-measurement

After measuring a line, in order to verify the authenticity of the data and the extension and scale of the tectonic anomaly, we usually measure a parallel line 5 meters away from the original line, compare the results of the two measurements to confirm whether the measurement results are true and whether the data collection is effective, analyze the geological structure through the curve and profile combined with the measurement data, stratigraphic lithology, etc., and analyze the existence of water storage structures and conditions, so as to determine the location of the well. and conditions, so as to determine the well location.

Cautions:

1、Try to avoid measuring under high voltage lines, railroads, transformers, large machinery construction areas and other disturbing environments. Keep the line in a straight line as much as possible, and the difference between points should not be more than 1 meter.

2、Use the mountain shape, geomorphology, rock outcrops and other references to select the target area, observe the inclination direction of the rock fissure, the measurement line and faults, fissure light structure cross for wiring.

3、Pay attention to the local electromagnetic environment and electrical conditions, the ground surface is too dry, too loose, too hard, have a great impact on the grounding conditions, you can insert electrodes in the place of water and wait for a while before starting data acquisition, electrodes inserted as deep as possible, too wet and the ground is water prone to the formation of shallow barriers, not conducive to the measurement, you can wait for the drying of the measurement before doing the work.

4、The point spacing of the multi-channel instrument is set and fixed, and cannot be changed at will. And at least 9 electrode rods should be inserted and more than 5 points should be measured.