NJJ-200 Handy Search Users Guide (For FCC and CE Version)
I. Preface Thank you very much for purchasing JRC NJJ-200 Handy Search. This product nondestructively locates, detects, and displays the depths and positions of rebars in reinforced concrete structures. ●Before starting to use this product read this manual carefully to ensure correct and trouble-free operations. ●Keep this manual handy for reference. Refer to the manual when facing uncertainties or when experiencing troubles during operation.
II. 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.
III. 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 Before disposing of the used lithium ion battery, insulate the charging terminals by taping or the like. Otherwise, the battery could cause fire or explosion if short-circuited. Judge the scan result with considering the depth sensing capability of this product. Since the depth scan capability of this product is subject to the conditions of the object of investigation, judging the scan result with no consideration of the depth scan capability may cause the cutting of rebars.
CAUTION IMPORTANT NOTE: To comply with FCC & IC RF exposure compliance requirements, the antenna used for this transmitter must be installed to provide a separation distance of at least 20 cm from all persons and must not be co-located or operating in conjunction with any other antenna or transmitter.
IV.
V. Glossary of Terms A-mode B-mode BA-mode Real time auto surface wave processing Real time manual deduction processing Real time auto user surface wave processing Fixed surface wave processing User surface wave processing Displays received waveform as it is. The conditions of concrete directly underneath this product are displayed as reflected waveform in real time.
Glossary of Terms (continued) Deduction processing Manual surface wave processing Average wave processing Peak processing Original image Distance feed scan Time feed scan Relative dielectric constant Image processing to remove the stripe reflected waves throughout the entire depth, such as reflected waves from the concrete surface and from the rear surface etc. In this processing, an arbitrary line in the scan result is designated and the designated line is subtracted from the scan result data.
Contents I. Preface ........................................................................................ i II. Before Operation..................................................................... ii III. Precautions for Use .............................................................. iii IV. Appearance ............................................................................ vi V. Glossary of Terms .................................................................. vii 1. Product overview .........
4.3. [MARK] ICON ....................................................................................................... 39 4.3.1. MARKER ADDITION .......................................................................................... 39 4.3.2. MARKER DELETION ......................................................................................... 40 4.3.3. MARKER LIST ................................................................................................... 41 4.4. [FILE/PRINT] ICON ..........
4.12.1. [OPEN] MENU................................................................................................. 86 4.12.2. [SAVE/PRINT] MENU ....................................................................................... 87 4.12.3. [SELECT FOLDER] MENU............................................................................... 88 4.12.4. [DATA NUMBER SETTING] MENU ................................................................... 89 4.13. MARKER OPERATION....................................
8. Theory................................................................................... 156 8.1. APPLICABLE CONDITION................................................................................... 157 9. Maintenance and inspection ............................................... 158 9.1. 9.2. 9.3. DAILY INSPECTION ............................................................................................ 158 DAILY MAINTENANCE ......................................................................
1. Product overview To extend the life of concrete buildings, continuing the inspection and implementing renovation and repair appropriately of the buildings is essential. At the same time, the accurate and quick method for the building inspection is required to promote the building maintenance. This product is indispensable for repairing/rebuilding and maintaining reinforced concrete structures using its accurate and speedy diagnostic technology.
1.1. Functions and performances Table 1-1 shows functions and performances of this product.. Table 1-1 Functions and performances (1/2) No. 1 2 Item Search method Search object 3 Search depth 4 Depth resolution 5 Horizontal discrimination resolution 6 Horizontal distance resolution 7 Maximum scan distance 8 9 10 11 Functions and Performances Electromagnetic wave radar method Rebar, Polyvinyl-chloride pipe, Cavity, etc. 5 to 300 mm for concrete having a relative dielectric constant 6.
1.2. Features This product has the following features. This product can: (1) Detect either metallic or non-metallic object. 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 rebar. Note that polyvinyl-chloride pipes and cavities echo weakly in compared with the rebar.
(7) Perform 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 rebars. 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 configuration Table 1-2 shows the standard configuration of this product.
1.4. Overall system diagram Figure 1-1 shows the overall system diagram of this product.
1.5. Name and function of each part This section shows the name and function of each part of NJJ-200 sensor unit and handle.
Table 1-4 Name and function of each part (1/2) Ref ① Name Smartphone ② Smartphone fixing lever ③ Antenna mark button Start button Handle ④ ⑤ ⑥ Handle fixing screw ⑦ Function LED ⑧ ⑨ Power LED Handstrap mouting hole Sensor unit ⑩ ⑪ ⑰ Side LED ⑫ ⑱ Front LED Rear LED ⑭ Power switch Function Controls the sensor unit (⑩) and displays the scan data obtained by the sensor unit on its screen. Used to fix Smartphone (①) to the handle (⑤). For more details, refer to Section 2.
Table 1-4 Name and functions of each part (2/2) Ref ⑮ Name Battery cover ⑯ Smartphone release lever ⑲ Rear chalk guide ⑬ Front chalk guide Function Battery cover of the sensor unit. For more details, refer to Sections 2.6 Attachment of the battery pack and 2.7 Detachment of the battery pack. Lever used to remove Smartphone from the handle (⑤). It can release Smartphone fixing lever (②). For more details, refer to Section 2.9 Attachment and detachment of Smartphone.
2. Preparation before starting to use This section decribes the preparation before starting to use this product. This product uses a Smartphone as the control display, so that it requires the preparation of the Smartphone before starting to use. As the preparation related with Smartphone, you need to install the control software NJJ-200 application into Smartphone and to complete the communication setup between Smartphone and the sensor unit.
2.2. NJJ-200 application installation Install NJJ-200 application into Smartphone with the following procedure. (1) Copy NJJ-200 application file from PC to Smartphone with the following procedure. NJJ-200 application file is provided in the CD-R attached to this product. By connecting Smartphone and a PC by using a USB cable (or a micro USB cable), Smartphone can be recognized and mounted as a removal data drive on the PC, then the file copy operation of drag and drop become available.
(2) Install NJJ-200 application into Smartphone with the following procedure. a) b) At the security setting in Smartphone, set the setting so as to allow the installation of applications from the unknown sources. For the detailed procedure, refer to the manual attached to Smartphone. Example: Tap [Setting], [Device setting], [Lock & Security], and tap [Unknown source]. Activate the file management application (Contents manager, File commander, etc.) in Smartphone.
) ) ) ) ) ) From the previous page To the next page Figure 2-1 NJJ-200 application installation (2/4) 13
) Press the button, then release it.
) ) ) ) ) From the previous page Figure 2-1 NJJ-200 application installation (4/4) 15
(1) NJJ-200 application operational verification Make sure that NJJ-200 application is properly installed in Smartphone by the following procedures (Refer to Figure 2-2). If it displays the main screen of NJJ-200 application, the installation is completed successfully. a) b) c) Turn on Smartphone. Wait a little, then the home screen of Smartphone appears. Tap [Application] icon in the home screen of Smartphone. Tap [NJJ-200] icon shown in [Download Application] to run NJJ-200 application.
2.3. Smartphone language setup Switching the language of NJJ-200 application is made by the language setting in Smartphone. Set the language of your choice to Smartphone by referring to the Smartphone manual. NJJ-200 application supports Japanese and English. If other languages are chosen, English is selected in NJJ-200 application.. 2.4. Attachment and detachment of the handle The handle is attachable to and detachable from the sensor unit. The attachment and detachment procedure are provided below.
2.5. Attachment of the handstrap A handstrap is furnished to the sensor unit as the standard accessory to prevent the accidental dropping of the sensor unit.
2.6. Attachment of the battery pack This product supports only the battery pack as its power source. Attach the battery pack into the sensor unit in accordance with the following steps. (1) Make sure that the power switch (Figure 1-2 ⑭)is in OFF position. (2) Open the battery cover by pushing up the locking tab located on the lower part of the battery cover (Figure 1-2 ⑮). (3) Insert the battery pack pin side first until it locks into place. (You should hear a “click” when it locks into place.
2.7. Detachment of the battery pack When removing the battery pack, perform the following steps. (1) Make sure that the power switch is in OFF position. (2) Open the battery cover by pushing up the lock tab located on the lower part of the battery cover. (3) Press down the battery pack release button. Then the battery will be pushed out. Remove the battery pack from the sensor unit. Be careful so as not to drop the battery. (4) Close the battery cover.
2.8. Communication setup Use the following procedure to establish the communication between the sensor unit and Smartphone through wireless LAN. ) (8) (9) ) (6) (7) Make sure the battery pack is installed and the sensor unit is switched to ON position. Turn on Smartphone. Home screen of Smartphone will appear after a while. Set Smartphone to Airplane mode. Tap [Application] icon on the home screen. Tap [NJJ-200] icon in [Downloaded application].
Notes on wireless communication: y Some devices operate using the same frequency bands adopted by this product. Equipment such as microwave ovens and other home electronics, radios and equipment used in various types of radio stations including Amateur Radio stations, and devices that operate on industrial, scientific, or medical frequency bands may experience interference from this product. y In case any harmful radio interference occurred, immediately stop to use this product.
Note y The digits following “SENSOR-“ in the sensor unit’s ID number displayed on the sensor select screen corresponds with the last 5 digits in the serial number of the sensor unit. y Once Smart phone establishes the communication with the sensor unit, the ID of the the sensor unit is registered as the present connection destination. From the next boot up, NJJ-200 application establishes the communication with the registered sensor unit automatically.
2.9. Attachment and detachment of Smartphone Smartphone is put on the handle and fixed by Smartphone fixing lever of the handle. When attaching Smartphone on the handle, make sure first to release completely Smartphone fixing lever, then place Smartphone on the handle. For the detachment procedure of Smartphone, refer to the following (2) . (1) Attachment Procedure Place Smartphone at the front part of the handle.
3. Basic scan procedure This section describes the basic scan procedure. The following description assumes all the preparations described in Section 2 have been completed successfully. If some preparations have not been made yet, complete all the preparations in accordance with Section 2. In the following description, each icon or button displayed in NJJ-200 application is referred by using [its name]. WARNING Do not use any battery pack other than the recommended battery packs.
CAUTION Point the antenna surface in the direction of the probed object (concrete) while you are performing a probe. If it is pointed into the air or otherwise unsuitable direction, it can cause malfunction of other equipment or other such accidents. Do not place this product on an unstable place such as a wobbly table or sloping surface. Doing so may cause a personal injury or breakdown when it drops or falls.
3.1. Preparation for scanning lines Mark the start line and scanning line by using a chalk (or similar) on the concrete surface to indicate where to start scanning (starting line) and where to scan (scanning line). Make sure the start line and the scanning line are orthogonal. As necessary, in order to perform a re-scan, use the end point of the wall as the reference point for the start line and scanning line. An example for scanning line is shown in Figure 3-1. Object to be scanned (Concrete etc.
3.2. Battery capacity check Confirm that batteries attached into Smartphone and NJJ-200 sensor unit are sufficiently charged with the following procedure. (1) Smartphone battery capacity NJJ-200 application indicates the battery capacity of Smartphone on the left bottom of the main screen after the boot-up. (Refer to Figure 4-1 ⑬.) Figure 3-2 shows the remained capacity of the battery shown by each indication.
b) When starting the communication between Smartphone and the sensor unit NJJ-200 application shows the remained capacity of the sensor unit’s battery after starting the communication between Smartphone and the sensor unit. Figure 3-3 shows the remained capacity of the battery shown by each indication.
3.3. Scanning Perform the scan with the following procedure. (1) Confirm all settings of the product. The settings to be confirmed are [Display mode] (B/BA) , [Measurement mode] (Distance/Time), [Color] (Absolute /Offset), [Relative permittivity], and [Sensitivity]. For the setting procedure, refer to Section 4 NJJ-200 application functions. When the location of the embedded steel bar is known or the width of concrete is known, perform the depth calibration in accordance with Section 6.
(6) As necessary, perform the image processing of Real time manual subtraction. Waves reflected by objects to be probed (e.g., reinforcing steel) at a position near the concrete surface are difficult to identify because they are combined with waves reflected by the concrete surface (called surface waves).
(7) Stop the scan. Tap [ Start] icon (Refer to Figure 4-1 ①) of the main screen or press [Start] button on the sensor unit (Refer to Figure 1-2 ④) to stop the scan. Then a beep sounds twice and the scan is stopped. Figure 3-5 shows an example of the scan result. ([ Start] icon is displayed as [] during the scan, and after the scan stopped, its shape changes to [ ].
3.4. Interpreting the scan results Here describes the general procedure to identify position of the detected object. When the scan result shown in Figure 3-6 is obtained after the rebar detection, the image of the detected rebar would have the inverse U shape as shown in Figure 3-6. By using this description, you can determine that a rebar is located at the reverse U shape. The position of the detected object can be determined from the obtained image as described below.
3.5. Power off After completing all scan works, turn off NJJ-200 by switching the power switch to the OFF position. For Smartphone, tap Home button of Smartphone to end NJJ-200 application. Caution y When ending NJJ-200 application without saving the scan result into a file, the scan data disappear. y When turning off Smartphone display without ending NJJ-200 application, you can get the previous screen of NJJ-200 application by turning on the display.
