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Summary of Contents for Huazheng HZ-5000C
- Page 1 HZ-5000 Underground Cable Fault Detector User Manual Huazheng Electric Manufacturing (Baoding) Co., Ltd...
- Page 2 (0312) 6775656 to tell you to ser ve you at all times- Baoding Huazheng Elect ric Manufact uring Co. , Lt d. , our company will def initely make you satisf ied !
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Page 3: Table Of Contents
Contents I.Overview ............................2 II.Features ofHZ-5000 Cable Fault Detector ................2 III.Components and structural functions ofHZ-5000 cable fault detector ......4 IV. Specifications ........................... 19 V. Parts and Accessories ......................20 VI. Check before use ........................20 VII. Ways of Pipe locating: ......................23 VIII. -
Page 4: I.overview
I.Overview TheHZ-5000 underground cable fault detector can accurately locate and measure the buried depth of underground pipelines, cables, and optical cables without excavation, and accurately find the location of the damaged point of the outer anti-corrosion layer of the underground pipeline and the fault point of the buried cable. The instrument integrates the most advanced technologies such as ultra-narrowband filter, Bluetooth wireless communication, GPS positioning, professional data analysis software automatic mapping, automatic generation of test reports, etc. - Page 5 7) Specific functions ofHZ-5000 receiver: Used for locating faults (pipeline faults refer to damage of outer anticorruption layer, cable faults refer to damage of outer sheath) and detecting insulation damage of underground pipelines. 8) Measuring the current of the pipeline and cable applied by the transmitter. 9) Multimeter function: measure the output voltage, line voltage, line current, impedance and power;...
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Page 6: Iii.components And Structural Functions Ofhz-5000 Cable Fault Detector
3) Multiple Working Frequency: Transmitter frequency: 128Hz, 512Hz, 1KHz, 2KHz, 8KHz, 33KHz, 65KHz, 83KHz. Receiver frequency: radio, 50Hz, 100Hz, 128Hz, 512Hz, 1KHz, 2KHz, 8KHz, 33KHz, 65KHz, 83KHz. According to the target pipeline features (material, structure, depth, length, etc.) and the environment to select the appropriate operating frequency. - Page 7 The receiver is used for the measurement of underground pipelines, cable positioning, buried depth of underground pipelines, and tube current measurements. A variety of frequency and mode of operation to meet a variety of environments and a variety of pipeline detection needs. 1.1 Functions：...
- Page 8 Mode(3) The mode key is used to select the receiver's operating mode for precise positioning of the pipeline. The positioning process is usually measured by the peak method. Including: Valley mode Peak mode Wide mode Peak arrow mode Power mode: 50Hz power cable can be detected When there is an external A-frame, you can also select the external signal mode.
- Page 9 bar graph(8) above the display window and the number(9) below the graph. Depth/Current（5） key is used to measure the depth of the buried pipeline, meanwhile it could measurethe current value in the target line. In the current measurement process, regardless of the original use of which positioning mode, the system automatically switches to the peak mode.
- Page 10 Backlight（6） Press the backlight key, the backlight of display will turn on and keep a preset time, and then press the backlight button, backlight is off. The backlight time can be set via the backlight menu. Data Storage： Measured current and depth data storage method: After measuring the current value, the depth and current value are indicated in the middle of display.
- Page 11 Battery Indicators (7) The upper right corner of the display has a battery symbol that indicates how much battery power is. When a flashing battery symbol is displayed indicating that the built-in battery of the instrument is not enough for work and needs to be recharged.
- Page 12 Point distance indication（11） When the GPS is successfully connected and the satellite signal is received, the detection data saves the distance between the two measuring points and displays it in real time. If the GPS module is not configured and poi nt distance will display 0m. Data Storage Log（12）...
- Page 13 deviates from the right side of the pipeline, the left arrow appears. Coating Leaking Point Indicator When testing damage points or cable failure points, the arrows will help to indicate the location of the position on coating (as shown below). When the forward arrow appears, the point of failure is in front of the A-frame.
- Page 14 1.3 Receiver Setting Press key for 3 seconds to enter the main menu. Press to move the cursor. Press to enter the submenu or change the setting. Press to return the main menu. Menu Language Chinese Contrast control Entry British—Metric meter Speaker Volume English Menu 1...
- Page 15 Contrast Control Measurement Unit Setting：Press to move the cursor to British-Metric setting and press to set Footage or Metric. Menu Language Chinese Contrast control Entry British—Metric meter Speaker Volume Menu Language Chinese Contrast control Entry British—Metric Feet Speaker Volume Speaker Setting：Press to move the cursor to Speaker volume setting.
- Page 16 Menu Language Chinese Contrast control Entry British—Metric Feet Speaker Volume Backlighting Setting：Press to move the cursor to the backlight time setting. Press to set the time ：5S→15S→30S→1m→oftenlighting→Off→5S。 Menu Backlight Automatic Shut 10min Bluetooth Pairing Entry Search For Bluetooth Using Automatic Off Setting：Press to move the cursor to automatic off setting.
- Page 17 Bluetooth： Press to move the cursor to set the Bluetooth paring. Press enter the Bluetooth pairing. Menu Backlight Automatic Shut 10min Bluetooth Pairing Entry Search For Bluetooth Using Bluetooth Pairing Searching…… Bluetooth Pairing：Press to move the cursor to “HOLUX_M-1200”， Press to confirm.
- Page 18 Bluetooth Pairing Without Bluetooth equipment available Bluetooth ON：Press to move the cursor to Search for Bluetooth menu. Press to turn on/off the Bluetooth. （HZ-4000B is not equipped with GPS Bluetooth and the setting is forbidden.） Menu Backlight Automatic Shut 10min Bluetooth Pairing Entry Search For Bluetooth...
- Page 19 method and the inductive method. Transmitter with power, measuring distance, automatic impedance matching, automatic measurement of pipeline grounding resistance and so on Front Panel：7 touch keys, 2 indicator lights and a LED display screen. 2.1 Keyboards： ON/OFF: To turn on/off the transmitter Frequency: to adjust the transmitter power.
- Page 20 83KHz. Measurement (i): Press the measurement key to select the output parameters of the instrument:output power percentage, output power, output voltage, output current, output impedance. Enter (OK): When you set the frequency to be applied, press the OK key again to change the transmitter output frequency immediately.
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Page 21: Specifications
Display：The display has eight digits, the firstfour digits are used to display the measured value, that is, the transmitter output parameters (output power, output voltage, output current and output impedance), the seventh and eighthdigits display the output level (from 0 to 10). When the output level is from 0 to 9, only the seventh digit shows the relevant value. -
Page 22: Parts And Accessories
Output power: 10W Operating frequency: 128Hz, 512Hz, 1KHz, 2KHz, 8KHz, 33KHz, 65KHz, 83KHz (different operating frequencies according to different product models) Working modes: automatic conversion of three modes - direct connection, inductive connection and clamp connection Battery: 14.8V built-in lithium battery pack Working temperature: -20 ℃... - Page 23 the battery symbol has only one line, the battery symbol will flash indicating that the battery is low and it needs to be fully charged. Full battery Almost run out and please recharge 2) Operating frequency check: press the frequency key to select50Hz and adjust the sensitivity.
- Page 24 Three frequency output power corresponding percentage Level 33KHz 83KHz 65KHz Notes 65KHZ: 7 levels; 33KHz&83KHz: 9 levels 100% — 100% 100% — （1）Transmitter check: To check the battery power: turn on the transmitter and observe the monitor battery power indicator light; if the battery voltage indicator is less than 11V, you need to fully charge the battery before use.
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Page 25: Ways Of Pipe Locating
VII. Ways of Pipe locating: 1.Applying signal Underground pipeline detector field source has two kinds: passive and active source. The passive mode is used to search for an unknown power cable or an underground pipe to which a cathodic protection signal is applied and a metal line that is capable of sensing a radio frequency in a zone. - Page 26 1.3 Radio frequency detection mode: It is mainly used to detect the metal pipeline that is sensitive to the radio frequency. 2.Active mode The active source operates by applying a signal of the specific frequency from the transmitter to the pipeline, and then positioning and tracking the pipeline with the receiver. Using the active mode can not only locate the pipelineaccurately, track the pipeline and measure the depth, but also detect the coating damage pointson the underground pipeline accurately and determine the size of the damage point of the coating.
- Page 27 2) Parameter Setting Turn on the transmitter and the display shows the selected frequency, transmitter power and output parameters. According to the frequency required for measurement, select the option with the frequency key. Press the frequency key, the frequency triangle shape is lighted in the circle of 128Hz, 512Hz, 1KHz, 2KHZ, 8KHz, 33KHz, 65KHz and 83KHz.
- Page 28 reinforced concrete pavement because the signal will be shielded by metal covers or steel bars. The inductive connection method cannot be used to apply signals to well-insulated pipelines unless both ends of the pipeline are connected to ground well. Illustration of inductive connection 1）Distance between Transmitter and Receiver The transmitter will send signals to its upper space and the lower part of the pipeline at the same time, so the receiverwill receive the signal from transmitter if it...
- Page 29 Illustration of Placing Transmitter Place the transmitter on the "positive" side of the target line,and in the same pipeline directionto get better sensing signals. Illustration of Placing Transmitter 1）Transmitter Frequency Selection High-frequency signals are most susceptible to other pipelines. Please use high-frequency in the inductive connection.
- Page 30 the target pipeline and waste the battery power so the transmitter power selection should be appropriate. （3）Clamp connection The biggest difference between the clamp connection and the inductiveconnection is clamp connection uses an external clamp to apply the transmitter signal to the target line without the need for an inductive coil inside the transmitter.
- Page 31 is wide but the positioning accuracy is lower than other methods. The double horizontal antennas peak mode has a steeper peak response than the single horizontal antenna wide-peak mode, the measurement position is relatively accurate but the signal strength is weaker. When the receiver is above the positioning pipeline, the signal strength reaches its peak.
- Page 32 the pipeline and adjust the sensitivity so that the strength bar is between 60-80% of the entire range. Walk away from the transmitter, while moving the receiver to sides. When it shows that the middle is the peak with both sides diminishing, it means that the person who is locating is walking above the pipeline and he can make the long-distance tracking.
- Page 33 When using the valley (Minimum) mode to detect the target pipeline, it should periodically switch to the peak mode in order to verify the exact location of the target pipeline. Using the peak mode for fixed positioning and marking, and then switch to the valley (minimum) mode, mark the location of the pipeline valley (minimum) value.
- Page 34 Possible reasons: Pipeline is suddenly deepened. You can increase the sensitivity to continue the detecting. There may be a "T" -shaped branch, and the pipeline may also change direction. Check whether more than one tube carries the signal in the circle. If the pipeline is more than one, measure the response of each pipeline from the distance away from the intersection of 4-5 meters.
- Page 35 Figure a Illustration of Deeper Pipes Figure b Illustration of T Branch Pipe...
- Page 36 Figure c Illustration of the Pipe that Changes Directions Figure D Illustration of Detection of Pipe Ends...
- Page 37 Figure e Illustration of Detection under Steel Mesh Net Illustration of Depth Measurement...
- Page 38 2、Depth Measurement This multi frequency locator can measure the depth of the target pipeline. Most commonly used methods are direct reading, 80% and 45 degrees methods. (1) Direct reading method: to measure the depth of the range: 4.5cm-6m. When the range is exceeded or the signal is not normal, the receiver display shows an error message.Before depth detecting, the target pipeline should be accurately located by the receiver peak mode and the valley mode.
- Page 39 when the target pipeline diameter is large. If there is any doubt about the depth measurement, the result can be verified by putting the receiver 0.5 m above the ground and measuring again. If the measured value is increased by 0.5 m, the depth measurement is correct. Depth measurement accuracy can reach up to 5% of pipeline depth if conditions permit, but operators do not know if bathymetric conditions are always appropriate.
- Page 40 Illustration of 80% Depth Measurement （1）45 Degree Depth Measurement Illustration of 45 Degree Depth Measurement First of all, measure theaccurate location and direction of the target pipeline and switch the receiver mode of operation to valley mode, put the bottom of the receiver on the ground above the pipeline, adjust the receiver body to the ground at a 45-degree angle and move the receiver along the direction perpendicular to the pipeline.
- Page 41 commonly used and it is relatively accurate especially in complicated pipe network. The 45 degree measurement needs to master the receiver body Angle with the ground. Direct reading depth method used in complex environments often comes with big deviation. It is more suitable for long-distance single buried pipeline depth measurement.
- Page 42 Figure g: Tee and elbow at the current measurement diagram Principle of Current measurement: the transmitter applies a current signal to the target pipeline. As the distance from the transmitter increases, the current intensity will gradually reduce and the degree of attenuation depends on the pipeline type and soil.
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Page 43: Procedures Of Detection
accuracy. If the measured value is suspicious, search the nearby areas and check the nearby lines for other radiated signals. Depth / current measurements should be taken to other points of the pipeline if other signals cause interference. VIII. Procedures of Detection 1.Material Preparation and On the Spot Research This underground pipeline detector can locate all buried metal pipes and cables in one area. - Page 44 is at right angles to the measured pipeline. When the receiver response increases, it means that there is a pipeline. Stop and position the pipeline accurately. Mark the location of the pipeline and trace the pipeline until it leaves the detected area. Then return to the area and continue network scanning.
- Page 45 Illustration of Induction Search By means of induction search, you can detect the missed pipeline of the passive search and other pipelines that do not sense the 50Hz signal. Technique: Keep the distance between the receiver and the transmitter. In the inductive connection mode, the transmitter emits signals to the target pipeline and also sends signals into the air, which may cause interference in the detection work near the transmitter.
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Page 46: Ix.common Pipe Detection Techniques
street lights and fire hydrants, etc. on the ground. Then apply the transmitter signals on them and trace it from this position back. Position and Measure the depth of key points and feature points of various pipelines in the area, mark at each detection point, record relevant pipeline data and detection results, and then sort the data recorded and draw the pipeline map. - Page 47 the deviation. In general, the response of the receiver to the target pipeline should be greater than to the nearby pipeline. The target pipeline can be identified and tracked by the receiver's response. However, if the adjacent pipeline is closer to the surface, the receiver's response to the nearby pipeline may exceed the target pipeline.
- Page 48 in pipeline detection, which may result in inaccurate position or depth measurement of the target pipeline or detection of an incorrect pipeline. In many cases, a certain degree of induction is unavoidable, but by using on-site inspection experience, some methods can be used to reduce the degree of induction, thus improving the reliability of detection.
- Page 49 transmitter's ground is connected to another access point in the target pipeline through a long wire. This eliminates the need for grounding to form a complete circuit. The long pipeline should be far from the possible direction ofthe target pipeline. Illustration of Cable Detection of the Fence 5.Some Problems in Power Cable Detection Before applying the transmitter signal, it is necessary to disassemble the common...
- Page 50 The cable is usually buried directly under the road outside the metal fence on the road, and the signal will be coupled to the metal fence. Because the metal fence is close to the antenna at the bottom of the receiver, tracking becomes difficult.
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Page 51: X.anti Corrosion Coating Inspection
If you want to locate the pipeline on or near the road, you can use a single-ended connection method to connect the transmitter to the valve, and connect the ground cable to the metal frame of the valve box. Make sure the connecting magnets are in good contact with the pipes. - Page 52 cable). When using the A-frame to detect along the pipeline, insert the A-frame every three or four steps. As you gradually approach the point of failure, the receiver signal will increase and the gain will need to be adjusted to reduce the sensitivity of the receiver. If the signal starts to increase, the detection speed should be slowed down, and each small segment of the ground should be carefully checked to prevent ignoring the point of failure.
- Page 53 It can be seen from the above figure that when the A-frame approaches the fault point, the receiver's horizontal signal will gradually increase (the readings in the figure are only diagrams, indicating that the signal size changes with the detection position). When it is necessary to accurately locate the fault point, the accurate position of the fault point can be found when the A-frame is turned to be perpendicular to the cable.
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Page 54: Xi.cable Low Resistance And Broken Line Fault Points
XI.Cable low resistance and broken line fault points This chapter is an auxiliary chapter, please choose to read as necessary. When the cable fault resistance is low, if the legal point of high-voltage impact discharge is adopted, the discharge sound at the fault point is weak, especially if there is no discharge sound in the fault of gold property dead earth, and the accurate fixed point of acoustic measurement method fails, audio induction method should be changed. - Page 55 2) Fixed-point method Due to the cable core along the cable twisting path forward, therefore, when on the point of failure front the cable path forward, signal amplitude has the rule changes, according to cable torque, when located above the failure point, generally will be the strongest signal amplitude, and continue to move forward from the point of failure, the signal is reduced to a stable and very small amplitude.
- Page 56 value can usually be measured above the fault point. After the fault point, the signal drops to a stable and small amplitude. Since the cable path is clearly marked, just go at a normal pace, not at a slow pace. ...
- Page 57 Relative armoured low resistance grounding fault of fixed point method and the alternate with basically the same, but note that: before disabled points, the signal amplitude stable but is very small, after the point of failure, a nodal distance changes, fault point located above the first peak.
- Page 58 The point of a broken line is basically the same as the normal line tracking. Keep the receiver perpendicular to the cable, using the peak method, starting near the transmitter and gradually moving the probe to the far end. The signal is strong before the fault point, and then weakens rapidly. The point at which the signal begins to weaken is the point of failure.
- Page 59 As shown in the figure above, the ground at both ends of the zero line and ground line of the low-voltage cable are all unwound, and the output of the transmitter is connected directly between the fault phase and the ground. The signal flows from the transmitter to the fault phase, flows to the ground at the ...
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