ＮＪＪ－１０５ Handy Search Users Guide
Preface Thank you very much for purchasing this JRC NJJ-105 Handy Search (hereafter called this product). The NJJ-105 Handy Search nondestructively locates, detects, and displays the depths and positions of reinforcing steel bars in reinforced concrete structures. ●Before starting to use the NJJ-105 Handy Search, read through this instruction manual carefully to learn correct operations and ensure correct and trouble-free operations. ●Keep the instruction manual handy for reference.
Before Operation Pictorial Indication Various icons are indicated in this manual and are labeled on this product to ensure your safe and correct operations and to prevent any danger to you and/or other persons and any damage to your property during operation. Such indications and their meanings are as follows. Please understand them before reading this manual.
Precautions for Use WARNING Do not use any battery pack other than the recommended battery packs. Doing so may cause fire, electric shock, or breakdown. Do not short-circuit the terminals of the battery charger or battery pack. Doing so may cause fire, explosion, or breakdown. Do not insert metallic or flammable objects into the CF memory slot. Doing so may cause injury, fire, electric shock, or breakdown. Do not disassemble, modify, heat, or place battery pack in fire.
CAUTION Judge the scan result with considering the depth sensing capability of this product. Since the depth sensing capability of this product is subject to the conditions of the object of investigation, judging the scan result with no consideration of the depth sensing capability may cause the cutting of rebar. Put your hand through the hand strap and hold this product. Dropping of this product may cause an accident such as a device breakdown or personal injury.
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Table of Contents Preface Before Operation Precautions for Use Appearance Glossary of Terms 1 Description of Equipment 1.1 Function 1.2 Features 1.3 Configuration 1.4 Overall System Diagram 1.5 Configuration 2 Parts Names and Functions 2.1 Handy Search NJJ-105 2.2 Example of the Scan Screen 2.2.1 Scan screen example (during scanning) 2.2.2 Scan screen example (during not scanning) 2.3 Parameter setting screen 2.3.1 disp. color i ii iii v ix 1 1 3 5 6 7 8 8 12 12 14 16 16 2.3.2 disp. direction 16 2.3.
2.3.20 disp.mode. setting 24 2.3.21 Amplitude. setting 24 2.3.22 X-axis. setting 24 2.3.23 depth. setting 24 2.3.24 output. setting 25 2.3.25 disp. range. setting 25 2.3.26 gain. setting 25 2.3.27 Marker 2.4 CF Control screen 3 Operating Method 3.1 Scan preparation 3.2 Scanning 3.2.1 Power-on procedure 25 26 27 29 36 36 3.2.2 Scanning 36 3.2.3 Sensitivity 38 3.2.4 Antenna Mark 38 3.2.5 Real time manual deduction processing 3.3 Operation while not Scanning 3.3.1 Mode switching 3.3.
3.7.4 Deleting all saved data under the selected folder 4 5 6 7 8 9 71 3.7.5 Deleting all saved data in the CF memory 3.8 Power-off Procedure 3.9 Clearing up this product and accessories 3.10 About the battery pack and charger 3.10.1 Battery pack BP-3007 series 73 74 74 75 76 3.10.2 Charging Device BC-3008 series Theory 4.1 Principle of Operation 4.2 Applicable Conditions Maintenance Inspection 5.1 Daily Inspection 5.2 Daily Maintenance 5.3 Troubleshooting After-sales Service Disposal 7.
Glossary of Terms A-mode Displays received waveform as it is. The conditions of concrete directly underneath this product are displayed as reflected waveform in real time. B-mode Displays the vertical cross section of a scan point by gradating the reflected waveform shown in A-mode according to reflection intensity and continuously displaying it. BA-mode Displays both B-mode and A-mode images at the same time.
Glossary of Terms (Continued) Original image Restores the image processed result to the original state and displays unprocessed raw data. Distance feed scan Scan method that performs scanning in accordance with Handy Search's traveling distance, using the distance detector mounted on the wheels of this product. Time feed scan Scan method that performs B-mode scanning at preset time intervals, regardless of movement of this product. Relative dielectric constant Object-specific coefficient.
1 Description of Equipment This product is indispensable for repairing/rebuilding and maintaining reinforced concrete structures using its accurate and speedy diagnostic technology. This product (concrete internal probe vehicle) radiates electromagnetic waves through the surface of concrete and receives reflected signals from objects found inside such as reinforcing steel bars, cavities, or other objects that have different electrical characteristics from concrete.
Table 1-1 item No. 6 7 8 Functions and Performances of NJJ-105 (Continued) Maximum search depth Maximum scan distance Display mode Functions and Performances 2.
1.2 Features This product has the following features: (1) The material of the object to be scanned can be either metallic or non-metallic Reflected electromagnetic waves are generated at an interface when the electrical property of an object is different from that of concrete. Thus, this product can probe polyvinyl-chloride pipes and cavities (dependent on the position and size) as well as the reinforcing steel bars.
(7) Performing real time automatic surface wave processing Internal fixed surface wave data is used to automatically remove the wave reflected from the concrete surface during scanning enabling the showing of the reflected wave from rebar. Furthermore, surface wave processing can be switched to processing that uses scan data surface waves during scanning (real time manual deduction) enabling highly accurate surface processing.
1.3 Configuration (1) Standard components Table 1-2 shows the standard configuration of the Product NJJ-105.
1.4 Overall System Diagram Figure 1-1 shows the overall system diagram of this product. CPU Memory Op key LCD IrDA Trans Control section CompactFlash memory Trans Receive Distance Detector Trans antenna Figure 1-1 Rec.
1.5 Configuration Figure 1-2 shows the external views of this product. 149 Top view drawing 216 4 79 147 64 Side view drawing Figure 1-2.
2 Parts Names and Functions 2.1 Handy Search NJJ-105 This section shows the operation panel of this product and explains the functions for each part.
Table 2-1 Main Functions of Parts on this product Number in Square Label 1 (None) LCD (liguid crystal display) screen 2 (None) Battery holder 3 GAIN Sets the sensitivity 4 SET Sets each of the parameters. 5 ENTER Decision key for start of image processing and various types of selection. 6 PRCS Switch to image processing mode. 7 (None) IrDA optical receptor for communicating with the printer 8 (None) CF memory slot 9 START Starts/stops the scanning.
８ １４ １５ Figure 2-2 Side View ＮＪＪ－１０５ １６ １７ １４ Figure 2-3 Rear View - 10 - １８
Table 2-2 Functions of Parts on the Side and Rear Panel Number in Square Label 14 V 15 (None) 16 POWER ON OFF 17 (None) Equipment nameplate 18 (None) Connector for AC adapter Function Mark indicating the scan position. Antenna face to radiate and receive electromagnetic waves Turns power on and off.
2.2 Example of the Scan Screen Describes each display on the scan screen. 2.2.1 Scan screen example (during scanning) An example of a scan screen (during scanning) is shown in Figure 2-4.
(3) Depth gauge Displays a depth gauge. The depth gauge changes based on the depth calibration value. (4) Fixed cursor Is a cursor fixed at the specified position that is used to designate surface waves used for real time manual deduction processing. See Section 3.2.5 Real time manual deduction processing for more details. (5) Sensitivity display Displays the scan sensitivity setting. See Section 3.2.3 Sensitivity for more details. (6) Antenna mark Displays the position of antenna marks. See Section 3.2.
2.2.2 Scan screen example (during not scanning) An example of a scan screen (not during scanning) is shown in Figure 2-5.
(5) Sensitivity display Displys the sensitivity setting. See Section 3.3.2 Sensitivity switching for the method to switch sensitivity. (6) Cursor marker Displays the position of cursor markers. See Section 3.3.3 Cursor operation for how to display and erase the cursor marker. (7) Cursor coordinates Displays the coordinates of the cross point of the cursor described in the item (4) above. The distance moved is shown in the X field and depth in the Y field.
2.3 Parameter setting screen The parameter setting screen Is used to see the current setting and to change the setting for each parameter. To access this screen, press the 4 SET key while the scan is stopped, then the parameter setting screen shown in Figure 2-6 appears. To change the setting of a parameter, move the cursor (inverse video line) on the parameter by pressing the ▲▼ cursor keys, press the cursor keys to enter into the setting field of the parameter.
while scanning to the right or to the left. The examples of the screen display for normal and invert settings are shown in Figure 2-7. Set a desired setting to this parameter in accordance with the procedure described in section 2.3. Remarks • The direction of the image data output to the printer (optional) follows the setting of the display directcion . To output image data to the printer always in the same direction, set the same setting to the display direction.
2.3.4 amplitude You can specify the zero axis of the A-mode waveform and the color gradation used in the B-mode display by this parameter. The available settings are abs and offset . The abs sets the zero axis of the A-mode waveform (absolute amplitude) at the vertical center line in the A-mode diaply, and the offset sets the zero axis of the A-mode waveform (offset amplitude) at the left edge of the A-mode display.
2.3.5 X-axis You can specify the scan mode by this parameter. The available settings are distance (distance feed) and time (time feed). When distance is selected, this product scans and displays the scan result in units of 2.5 mm in the B or BA-mode display with synchronizing the wheels' moving distance. When time is selected, this product scans and displays the scan result at 50 ms intervals in the B or BA-mode display, regardless of the wheels' moving distance.
2.3.8 data No. You can specify the data number for the external output dat by this parameter. The scan result data is recorded and numbered when being externally output. This parameter displays the current data number of the output data, and the data number (Data No.) in this parameter is incremented each time when the data is recorded and output. Set a desired data number to this parameter in accordance with the procedure described in section 2.3.
2.3.10 dist. adj. You can specify the distance correction constant by this parameter. This product determines its scanning distance using the number of rotations of the wheel. Thus, wear of the wheels causes error in determining the scanning distance. To remove erro in the scanning distance, this product compensates the detected distance by using the distance correction constant set to this parameter.
2.3.12 disp. range You can specify the display range of the search depth and distance range by this parameter. The available settings are (Deep Wide), NW (Normal Wide), D (Deep), N (Normal), S (Shallow), DW SW (Shallow Wide). Select a setting based on depth of the object to be scanned as follows.
2.3.16 Scroll.speed You can specify a scrolling speed by this parameter. The available settings are Step up and Constant . Select Step up when the scrolling speed is getting faster gradually. Select Constant when the scrolling speed is constant. Set a desired setting to this parameter in accordance with the procedure described in section 2.3. Remarks • By using the setting of Constant , you can confirm the number of rebar and the reinforced condition in the concrete by scrolling the scan screen. 2.3.
2.3.20 disp.mode. setting You can specify the initial setting for disp. mode (the display mode) at the power on by this parameter. The available settings are the last end and default . The the last end sets the previous setting at the power off to the display mode at the power on. The default sets the pre-defined display mode ( B ) to the display mode at the power on. Set a desired setting to this parameter in accordance with the procedure described in section 2.3. 2.3.21 Amplitude.
2.3.24 output. setting You can specify the initial setting for output (the external data output) at the power on by this parameter. The available settings are the last end and default . The the last end sets the previous value at the power off to the output at the power on. The default sets the pre-defined value ( printer (I) ) to the output at the power on. Set a desired setting to this parameter in accordance with the procedure described in section 2.3. 2.3.25 disp. range.
2.4 CF Control screen While scanning is in off status and the 12 CF key is pressed, the screen switches to the CF control screen and CF memory control can be performed. To return to the scan screen, press the 12 CF key once more. See Sections 3.6.2 to 3.7.4 for how to control the CF memory. The CF control screen is shown in Figure 2-9. (1) Title (2) File selection (3) Thumbnails (4) Control items Figure 2-9 CF Control Screen (1) Title Displays the folder name accessed on the CF memory.
