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Your excellent helper in measuring instruments

.

Your excellent helper in
measuring instruments.

NF-826

VER: V1

UNDERGROUND WIRE LOCATOR

UNDERGROUND WIRE LOCATOR

USER MANUAL

USER MANUAL

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Summary of Contents for NF-826

Page 1: ...Your excellent helper in measuring instruments Your excellent helper in measuring instruments NF 826 VER V1 UNDERGROUND WIRE LOCATOR UNDERGROUND WIRE LOCATOR USER MANUAL USER MANUAL ...

Page 2: ...nd metal heating pipe 3 1 5 Locating of line interruptions using two transmitters 3 1 6 Error detection for an electrical floor heating 3 1 7 Track an underground circuit 3 1 8 Detect the power supply circuit on the same floor 3 2 Dual pole applications 3 2 1 Search for the fuses 3 2 2 Search for short circuit in the circuit 3 2 3 Applications in closed circuits 3 2 4 Classify or determine the lai...

Page 3: ...is NF 826 Cable Locator developed by our company to effectively assist users to locate and detect cables you no longer need to take your chance This Cable Locator is a portable instrument consisting of a transmitter a receiver and some accessories With advanced integrated parts and digital circuit technologies it is characterized by highly stable and reliable electrical performance The transmitter...

Page 4: ... off automatically over 15 minutes of absence of keystroke The receiver s LCD screen is provided with backlight for application in poor light Both the transmitter and the receiver is provided with flash light function when working in darkness Additional transmitters are available to extend or distinguish several signals Compactness durability and portability 1 2 Characteristics of Cable Locator NF...

Page 5: ...ted to the earth may be live in the event of an error if the earth resistance does not comply with the prescriptions 2 When the transmitter is connected with live mains if the Grounding hole of the transmitter is connected with protective ground phase the current leakage if any in the power supply line may join the circuit current of the transmitter leading to tripping of the leakage circuit break...

Page 6: ... leads must also be connected to the transmitter and the same ground See Fig 2 2 Switch on the transmitter via key when the LCD screen of the transmitter will display the initial screen and the buzzer will buzz Press key of the transmitter to enter the screen for setting transmitting level and then press up key or down key to select transmitting power level Level I II or III After this level is se...

Page 7: ... should be ensured 2 The transition resistance of a line interruption must be higher than 100k Ohm 3 When tracing line interruptions in multi core cables note that all remaining leads in the shielded cable or conductor must be grounded in accordance with the regulations This is required to avoid cross coupling of the fed signals by a capacitive effect to the source terminals The tracing depth for ...

Page 8: ...must not be charged The transmitter is connected to a metal helical tube metal tube or flexible conduit and an auxiliary ground wire as shown in Fig 3 1 3 The measuring method is the same as that used in the example 1 If there is current in the pipeline cut off the power and correctly earth it when the pipeline is not charged 2 The grounding end should be properly grounded and the grounding end of...

Page 9: ... 1 5 Connect both transmitters as shown in Fig 3 1 5 Proceed as described in the application example If the transmitters are connected in accordance with Fig 3 1 5 the receiver indicates C on the left side ofthe line interruption If the receiver goes beyond the interruption position towards the right it will display F If you are directly above the interruption no line code is displayed due to the ...

Page 10: ...ting of the proper sensitivity 4 A second transmitter is not indispensable for this application For single transmitter application see Fig 3 1 6a 3 1 7 Track an underground circuit Preconditions The circuit must not be charged Connect the transmitter in a way shown in Fig 3 1 7 The grounding end of the transmitter must be properly grounded Select the automatic mode of the receiver Use the displaye...

Page 11: ...s on the socket of any residence to feed the signals from the transmitter as shown in Fig 3 2 1 and adjust the transmitting power of the transmitter to a suitable level Preconditions Turn off all the air switches in the distribution box Connect the transmitter according to Fig 3 2 1 When connecting charged circuits to the transmitter please do abide by the safety instructions 1 The identification ...

Page 12: ...osition is where the short circuit locates 3 Adjust the transmitting power of the transmitter to adapt to different radiuses of detection 4 Select the manual mode on the receiver and select suitable receiving sensitivity to precisely locate the circuit 3 2 3 Applications in closed circuits It can be applied to charged circuits and uncharged circuits In uncharged circuits the transmitter only sends...

Page 13: ...rt distance between the feeding line and the loop line causes a seriously distorted magnetic field Magnetic field with sufficient strength cannot be built up at the narrow parts If a separate loop line is used this problem would be easily solved as the separate conductor can make the magnetic field diffused more strongly The loop line may be any kind of conducting wires or cable reels The importan...

Page 14: ...mode on the receiverand select suitable receiving sensitivity to precisely locate the circuit 3 4 Identify voltage in the grid and search for breakages in the circuit Preconditions The circuit must be charged with AC voltage The measurement must be conducted according to Fig 3 4 Set the transmitter to Grid Voltage Identification mode namely the UAC mode 1 The AC signals detected by the transmitter...

Page 15: ... and standard symbols are used to distinguish AC and DC circuits see in the interface displayed on the transmitter and the upper part of the monitor shows a lightning symbol with a triangular frame see in the interface displayed on the transmitter The range of identification is 12 400V DC AC AC 50 60Hz 4 2 Flashlight function Press the flashlight button on the transmitter or flashlight button on t...

Page 16: ...ipped with clean water or neutral detergent to wipe the transmitter and then use a dry rag to wipe it again 6 2 Checking of the fuse of the transmitter The fuse of the transmitter can prevent the transmitter from being damaged by overload or wrong operations If the fuse in the transmitter has already been melted down the transmitter can only transmit weak signals If the self check of transmitter i...

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