Huazheng HZ-5000 User Manual Download Page 3

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Contents

......................................................................................................................................... 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. Procedures of Detection

.......................................................................................................41

IX.Common Pipe Detection Techniques

....................................................................................44

X.Anti Corrosion Coating Inspection

.......................................................................................... 49

XI.Cable low resistance and broken line fault points

...............................................................52

Summary of Contents for HZ-5000

Page 1: ...HZ 5000 Underground Cable Detector User Manual Huazheng Electric Manufacturing Baoding Co Ltd...

Page 2: ...al and operate and maintain the instrument according to the manual to prolong its service life Just a light press the test will be completed automatically is the operating characteristics of this inst...

Page 3: ...ions 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 Procedures of Detection 41 IX Common Pipe Detection Techn...

Page 4: ...ion and inspection of metal pipelines pipeline management and maintenance municipal planning and construction power supply and other departments are the necessary instruments for pipeline maintenance...

Page 5: ...tioning valley mode peak mode broad peak mode peak arrow mode can verify each other to ensure the accuracy of pipeline positioning 1 Maximum value method peak mode broad peak mode and peak arrow mode...

Page 6: ...ent of the receiver sensitivity so that the measurement signal achieves the best result The mode returns to the original one after the depth measurement 6 Long continuous working time with the low cos...

Page 7: ...Turn on off 1 Press the key to start the boot or to shut down When the receiver is turned on the receiver automatically shuts down if no function key is pressed during the set auto power off time If a...

Page 8: ...ected When there is an external A frame you can also select the external signal mode 4 To increase please press To decrease please press In the adjustment the number is shown in the middle of the disp...

Page 9: ...perial from the menu Metric Units cm when the depth of the pipeline is less than 1 meter When the depth is more than 1 meter the depth display unit is m Inch unit feet Current unit When the current is...

Page 10: ...button togethrt for 3 seconds it enters the interface including frequency serial number distance depth and current etc Press and button to visit the previous and next page Press again to exit If no k...

Page 11: ...lugged into the 110V 220V power supply charger indicator light is red during charging and it will turn green after full charged Signal Strength 8 9 The bar graph above the display window indicates the...

Page 12: ...the menu settings Locating Mode 14 Press button to select modes Valley mode peak mode broad peak mode and peak arrow mode and the mode is displayed Frequency Indicator 15 Use the frequency key to sel...

Page 13: ...rrow appears the point of failure is in front of the A frame When the rear arrow appears the point of failure is behind the A frame A frame access status If A frame is connected press button to select...

Page 14: ...ast control Entry British Metric meter Speaker Volume Low English Menu 1 Menu 2 Backlight 15S Automatic Shut 10min Bluetooth Pairing Entry Search For Bluetooth Using English Menu 2 Language Setting Mo...

Page 15: ...nd press to set Footage or Metric Menu 1 Language Chinese Contrast control Entry British Metric meter Speaker Volume Low Menu 1 Language Chinese Contrast control Entry British Metric Feet Speaker Volu...

Page 16: ...et the time 5S 15S 30S 1m oftenlighting Off 5S Menu 2 Backlight 15S Automatic Shut 10min Bluetooth Pairing Entry Search For Bluetooth Using Automatic Off Setting Press to move the cursor to automatic...

Page 17: ...arching Bluetooth Pairing Press to move the cursor to HOLUX_M 1200 Press to confirm Receiver is paired with GPS Bluetooth module and the icon in the display is lighted The receiver can receive GPS dat...

Page 18: ...oth and the setting is forbidden Menu 2 Backlight 15S Automatic Shut 10min Bluetooth Pairing Entry Search For Bluetooth Using Menu 2 Backlight 15S Automatic Shut 10min Bluetooth Pairing Entry Search F...

Page 19: ...lay screen 2 1 Keyboards ON OFF To turn on off the transmitter Frequency to adjust the transmitter power Front Panel 1 2 ON OFF 3 Charging Indicator 4 Voltage Indicator 5 Working Indicator 6 7 Frequen...

Page 20: ...nd the available frequencies are 128Hz 512Hz 1KHz 2KHz 8KHz 33KHz 65KHz 83KHz Voltage The bottom line of the display shows the level of the supply voltage When the triangular indicator corresponding t...

Page 21: ...because it can work and then the power adapter is plugged into the instrument charging jack insert the other end to 110V 220V power supply When the charging is started the charging indicator should b...

Page 22: ...cessories No Item Qty 1 locato 1 2 transmitter 1 3 Direct connection signal wire 1 4 Clamps 1 5 Output wires 2 6 Grounding rod 1 7 Chargers 2 8 Connecting magnet 1 9 Power line 1 10 A frame 1 VI Check...

Page 23: ...ed to be large enough the receiver should have a signal response 4 Clamp method When the external clamp is inserted into the transmitter output interface press the button ON the transmitter will selec...

Page 24: ...and other lines being detected place an insulated cable or wire longer than 20 meters on the ground connect it to the ground bar or directly to the ground Connect the other end to the red wire black w...

Page 25: ...e reading and select the maximum or minimum method to grid search in a region back and forth search Carry the receiver to walk steadily so that the fuselage surface is aligned with the direction of mo...

Page 26: ...obing pipeline It is suitable for continuous tracking and positioning of various underground pipelines positioning and depth measuring with high precision 1 Connection Turn off the transmitter and ins...

Page 27: ...the ground point or add water at the ground to reduce the grounding resistance If the grounding resistance is too big the power of the instrument cannot be increased Note Be sure to connect the wires...

Page 28: ...uish whether there is any effect on the receiver from the transmitter source move the transmitter to one side by one or two meters and if the anomaly detected from the receiver is also moving it means...

Page 29: ...resistance pipelines e g communication cables pipes with coating and cast iron pipes use the frequency of 83KHz It must also be noted that the higher the frequency the more easily it is sensible to o...

Page 30: ...re with the positioning accuracy at any time to prevent the transmitter signal from being overlapped with the adjacent pipeline so that the detection result is deviated 1 Preparation 1 Check battery v...

Page 31: ...and 5 10 meters Radius if the inductive connectionis selected the radius need be greater than 20 meters adjust the sensitivity so that the receiver maintains a certain static signal Move the receiver...

Page 32: ...s intuitive fast but susceptible to interference and of poor accuracy This method is mainly used to quickly track the pipeline and verify the accuracy of the response received from the peak method The...

Page 33: ...l components of the target line The receiver gets the maximum value with a left and right arrow response when it is on the target line If the maximum value is in the same direction with the arrow you...

Page 34: ...e The signal completely disappears probably because it has reached the end of the pipeline or the metal pipeline has been changed into a plastic pipeline or the pipeline is crossing a metal plate or c...

Page 35: ...33 Figure a Illustration of Deeper Pipes Figure b Illustration of T Branch Pipe...

Page 36: ...34 Figure c Illustration of the Pipe that Changes Directions Figure D Illustration of Detection of Pipe Ends...

Page 37: ...35 Figure e Illustration of Detection under Steel Mesh Net Illustration of Depth Measurement...

Page 38: ...seconds the depth of the target line and the current in the tube will be displayed and then press the key to automatically restore the previous working status In depth measurement a good quality signa...

Page 39: ...surement Checking if there are interference lines with coupled signals in the 3 to 4 meters range of the target line which is the most common cause of error in depth measurements and strong signals in...

Page 40: ...ody to the ground at a 45 degree angle and move the receiver along the direction perpendicular to the pipeline When the received signal is the minimum value mark the point on the ground The distance b...

Page 41: ...interfering pipeline than on the target pipeline because it is shallower than the target pipeline In this case it is difficult to accurately distinguish the target pipeline from the interference pipe...

Page 42: ...However for one type of the pipeline the current attenuation will be steady without a sudden drop or change Sudden changes in current indicate that the pipeline or its condition has changed See figur...

Page 43: ...should be collected first Although sometimes these data are not very reliable or accurate but they can also provide some information about the pipelines in the area to be explored and the sites manho...

Page 44: ...ates the transmitter and the other operates the receiver Apply the signal to the pipeline when the transmitter passes through the pipeline and the receiver can detect the signal 20 meters upstream or...

Page 45: ...that the receiver is too close to the transmitter Another way to check whether a receiver receives a transmitter signal is to point the receiver tothe transmitter If the signal strength does not chang...

Page 46: ...of the branch pipe This signal will flow from the branch to the main line and then to both sides of the main line The receiver surface is at right angles to the main line and the signal is tracked al...

Page 47: ...n the ground Then place the transmitter flat on the ground and as far as possible in line with the underground pipeline and ensure that the pipeline is directly below the transmitter so that the signa...

Page 48: ...other access points outside the building instead of signals from the building Illustration of double ended connection Use lower frequency signals if possible to reduce the response to the adjacent pip...

Page 49: ...ake the transmitter work in inductive connection mode place it on one side of the transfer box and align it with the cable to be tracked In order for the transmitter signal to travel a sufficient dist...

Page 50: ...n poles concrete poles or lighting columns the transmitter can be placed in an inductive mode and the signal is applied by lining the pole at right angles to the ground 6 Some Problems in the Detectio...

Page 51: ...ill return through the fault point through the grounding rod HZ 5000 model can locate the fault in the underground pipeline using the A frame Specific steps are as follows 1 Frequency selection When u...

Page 52: ...current will decrease and the reading value will approach zero Adjust the gain and keep the readings at a higher value while moving the A frame Moving about 30 centimeters each time until a minimum re...

Page 53: ...urate position of the fault point can be found when the A frame is turned to be perpendicular to the cable At this time the location of the A frame is directly above the point of failure If the cable...

Page 54: ...stance fault with resistance less than 10 ohms A satisfactory result can be obtained by using the audio induction method to the two phase or three phase short circuit or combined ground fault point an...

Page 55: ...f the cable must be completely unwound and the grounding of the zero and ground wires of the low voltage cable should also be unwound to avoid interference from other signals Before the fixed point th...

Page 56: ...e increases it will continue to receive the signal of pitch change there is no need to be too concerned This is the only way to pinpoint a short circuit fault on a low voltage multiplex loaded cable B...

Page 57: ...fault phase and the ground and the end is not treated The signal from the transmitter flows through the fault phase and the interrupt at the breakdown point will not propagate forward For a pure line...

Page 58: ...be coupled to the armored cable through distributed capacitance resulting in a full length signal that cannot be distinguished between before and after faults It is recommended to use lower frequencie...

Page 59: ...needing attention Whether induction method can be used to butt the fault point on the ground mainly depends on the size of the fault resistance The larger the fault resistance is the weaker the signal...

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