I. Overview
1.1 Main uses and scope of application
The water leak detector is a special instrument used to find and determine the location of the leak point of the water supply pipeline. It can also be used to detect leaks in other pressure pipeline systems. When the fluid in the pipeline overflows under pressure, noise can be transmitted along the pipeline or along the buried layer. The medium spreads to the ground. The leak detector can determine the location of the leak along the pipeline or above the road surface. AJL-3000 water pipe leak detector is a leak detection instrument that uses low-power microprocessors and special filters to digitally process noise. It uses a specially designed broadband high-sensitivity vibration sensor (vibrator) to connect the ground (or pipeline The noise of the port) is picked up and converted into an electrical signal, which is amplified and digitized and filtered accordingly, and displayed on the LCD screen in two display planes.
1.2 Product Features
1.2.1 Adopting dot-matrix type LCD screen with backlight, with 7 light beams in the longitudinal direction, it is convenient to observe at night.
1.2.2 Two bands of ad hoc bandwidth change, not only to take care of the richness of vibration energy distribution during audiometry, but also to be more precise in frequency analysis.
1.2.3 Specially set the storage of 9 channels, which can store the signals of 7 frequency bands and the measured values of 7 measuring points respectively.
1.2.4 The designed special engineering plastic chassis and the corresponding panel operation are very simple and clear, and can obtain clear and extensive information in a convenient and simple operation mode, making the actual work of leak detection convenient and easy.
1.3 Product technical parameters
1.3.1 Frequency analysis width: 70 ~ 4000HZ range, nearly 5 octave bands, two kinds of bandwidth.
1.3.2 Frequency bin (center frequency): a, 100HZ b: 200HZ c: 400HZ d: 800HZ e: 1000HZ f: 1500HZ g: 3000HZ
1.3.3 Bandwidth: a Narrowband: marked symbol ┃┃┃
b. Mid-Broadband: Mark symbol ┃┃┃┃┃
1.3.4 Numerical display: Corresponding on the display bar, the sampled value is displayed as a relative value between 0 and 100 as the MIN value.
1.3.5 Screen 160 × 160 pixels LCD display window
1.3.6 Power supply mode: a group of lithium batteries with charging function.
1.3.7 Power supply working time ≥35 hours after the battery is fully charged
1.3.8 Store 9 measured values, store 9 channels separately and view them separately.
1.3.9 Operating temperature: -10 ℃ ~ + 50 ℃
1.3.10 Storage temperature: -10 ℃ ~ + 70 ℃
1.3.11 Instrument size (L × W × D): 230 × 100 × 100 mm
1.3.12 Weight:
AJL-3000 main box internal parts (including battery) 1.2kg
AJL-3000 vibration pickup (with socket plug connection) 0.6kg
The total weight of the suitcase is 5.2kg
Second, the overall product structure
2.1 Shape and structure
2.2 Product accessories
2.3 LCD screen
2.3.1 All-pass / band-pass key: switch between all-pass and band-pass modes
2.3.2 Bandwidth key: used to switch bandwidth.
2.3.3 Setting key: used for setting time, date and backlight brightness.
2.3.4 Storage key: used to store data.
2.3.5 View key: used to view saved data.
2.3.6 \"
\"Key: Used for upward selection.
2.3.7 \"
\"Key: Used for downward selection.
2.3.8 Illumination key: Turn on or off the backlight.
2.3.9 Clear screen key: Used to return.
2.3.10 Volume \"+ \", \"-\" keys: used to control the volume.
3. Use and operation
3.1 Preparation before use
3.1.1 Connect the headset and the vibration pickup assembly
3.2 Operation and instructions in use
3.2.1 Put on the headset, place the vibration pickup assembly on the desktop or the ground, and enter the measurement interface after power-on. The instrument is turned on by default to enter the\"\" full pass\"\" mode to listen to environmental noise, or gently wipe the ground near the vibration pickup assembly with your feet , Listen to the friction sound and observe the dynamics of the bar on the display. If you need to increase the sensitivity, lightly press the right end of the volume key \"+ \", otherwise, lightly press \"-\" until your ear feels good.
During the actual positioning process, you must press and hold the handle switch on the remote control component to receive the data, and then release it after storing. If you need to adjust the volume, you can also press the volume key \"+ \" or \"-\" accordingly.
3.2.2 All-pass / band-pass: The instrument is in the\"all-pass state\", which means that the leak detector can now pass and amplify the sound vibrations received by the vibration pickup assembly in the range of 70 to 4000 Hz . The sound quality of the sound conveyed in the headphones is rich and can be felt from low to high frequencies, which means that the sound of a wide frequency band (through ground vibration) of the surrounding environment can be received at this time. If the environment is quiet, the leak detection is also analyzable. However, if the environment is very noisy and there will be more interference, it may be difficult for the operator who has mastered this instrument for the first time. This requires working in the \"Band Pass \" state. The \"Full Pass / Band Pass \" key is the key to switch between the two states \"Full Pass \" and \"Band Pass \".
The leak detector has seven frequency bands and two bandwidths. The center frequencies of the 7 frequency bands are 100, 200, 400, 800, 1000, 1500, and 3000 Hz, and they are respectively set to have narrow and wide bandwidths, so as to perform detailed frequency analysis on the water leakage signal.
3.2.3 Center frequency selection (only valid in \"band pass \" working state): observe the frequency jump point on the display, if you need to increase the frequency, you can press \"\"Key, can be increased step by step, if you want to reduce the frequency, you can press \"\"Key can be reduced step by step, but if it has risen to the center frequency of 3 kHz, then press \"\"Key, it will be automatically reduced to low frequency (100HZ), if it has been reduced to \" 100HZ \"center frequency, then press \"\"Key will automatically jump to high frequency (3000HZ).
3.2.4 Bandwidth selection (only valid in \"band pass \" working state): Observe the bandwidth mark at the top of the display, if it is in narrow band \"┃┃┃ \", if you need to widen, press \"bandwidth \" Switch to \"┃┃┃┃┃ \", and press \"Bandwidth \" again to switch to narrowband \"┃┃┃ \".
3.2.5 Instant freeze on the screen: In band-pass mode, when there is an underline at \"100 \" at the bottom of the screen, it means that the instrument is now receiving the acoustic vibration signal in the frequency band whose center frequency is \"100 \". When it is dynamic and stable, it means that the water leakage signal strength is this value. If you need to write down this value, you can press \"\"Key, at this time, the receiving frequency band automatically rises to \" 200 \", underline jumps to \" 200 \", and the light bar of the original \" 100 \"band is fixed, and the corresponding value is fixed at the top. When \" 200 \"When the frequency band measurement needs to be recorded, press again \"\"Key, \" 200 \"is fixed, \" 400 \"jumps, and so on.
3.2.6 Storage of volume value: In band-pass or full-pass mode, after confirming the detected value, press \"Storage \" key, the interface of \"Storage Channel: 1 \" will appear automatically on the interface, press again at this time \"Storage \" key, the data will be saved, if you want to view, press \"View \" key. If you want to store the second data, you need to press \"save \" key, then press \"The\"\" key selects the second channel for storage. One channel can only store one set of data. The instrument has 9 storage channels. After each channel is full of one set of data, the first set of data will be automatically overwritten when the second set of data is stored. If you do n’t want to save after pressing \"Save \", you can press \"Clear Screen \" to exit.
3.2.7 Charging: After a period of use, the battery of the LCD display of the AJL-3000 panel becomes low and needs to be charged. AJL-3000 is equipped with a special charger and a special charging jack on the side of the instrument. Connect the charger to the 220V mains during charging. The charging output plug is inserted into the charging hole. The red indicator light on the charger lights up to indicate the start of charging. , Turn green when charging is complete.
4. Precautions for use
4.1 The leak detector is a precision instrument. Although it is operated in the field, its tolerance has been noted, but the operator should be prepared to take care to avoid unprovoked collisions, wetness, scratches, broken wires, etc., and pay special attention to the vibration pickup Do not drop it from a high place, and the surface of the instrument should not be stressed or damaged the LCD screen and keys. The special outer packaging box is equipped with positioning pads, and the components must be placed in place when packing, and the components should be straightened to avoid heavy pressure when closing the box. Pay attention to cleanliness during storage, no corrosion and avoid excessive humidity and high temperature.
5. Packing list
|
1 |
Main controller component |
1 |
|
2 |
Wire control components |
1 |
|
3 |
Probe |
1 |
|
4 |
Probe pin |
1 |
|
5 |
Probe pin seat |
1 |
|
6 |
Vibrator assembly |
1 |
|
7 |
headset |
1 |
|
8 |
strap |
1 |
|
9 |
charger |
1 |
|
10 |
Instructions |
1 serving |
|
11 |
Certificate of conformity |
1 serving |
|
12 |
Warranty Card |
1 serving |
|
13 |
Aluminum box key |
1 |
|
Aluminum alloy portable packing box |
1 |
|
|
15 |
Desiccant |
1 bag |
