SVLD1 Valve Leakage Detector (AE) User Manual

Quick operation guide Firstly, connect the sensor with the detector press "start" for a long time to enter the main interface of the test, ensure that the sensor and valve are well coupled during the test。 Press “Test” button to do valve leakage detection; Press” FFT” to view the FFT spectrum of the measured signal; Press” Back” to switch to current displayed acoustic emission parameters; Press” Save” to save the current testing datum; Press” Valve” to switch to the saved valves; Press “Filter” to switch the currently selected filter to the sampling rate； When no leakage calibration is carried...

Chapter 1: Introduction Firstly, thank for purchasing our Handheld Valve Leakage Detector (AE). Set up reference number of the leakage rate through gathering fixed length AE signals, processing and calculating effective parameters like RMS, ASL, P; at the same time can demarcate the leakage rate of the detecting device in advance, through internal calculation to output parameter- the demarcated curve of leakage rate, thus can output reference values of current leakage rate of the valve while testing。 This instrument applies the principle of acoustic emission technology, easy to operate small...

1.1 Technical parameters Model No. Parameter Sampling frequency Sampling precision Response frequency Protection level Channel quantity Working temperature Working humidity Built-in preamplifier Analog filter Six kinds of filters can choose（1KHz-1MHz, 1KHz-600KHz, 20KHz-1MHz, 20KHz-600KHz, 100KHz-1MHz, 100KHz-600KHz） 3VDC (two pieces of AA alkaline battery) 280 hours (Auto backlight） Working time 100 hours (Backlit open） Screen Outside size Working temperature -10℃～﹢50℃ (high temperature probe working temperature：＜300℃） Working humidity

• Applying the principles of acoustic emission technology, it is simplified operation process and easy to be operated. Multiple shortcut keys are set to complete leak detection with one key; • Choosing AE time indicators (RMS, ASL, P) as leakage testing parameters, thus can calibrate the valve leakage rate. Once leakage rate is calibrated, the detector can display the referential values while testing; • Obtaining FFT frequency spectrum analysis function, can check FFT frequency spectrum signals of current testing data at any time; • Up to 200 kinds of different valves are available, each kind...

• In order to make sure safe operation, the person who use this instrument should know related NDT Knowledge firstly; • This instrument should be used under permissive condition, especially cannot be used in strong magnetic field and under strong corrosive environment; • During the operating process, please obey the instruction to use correctly, make sure safe operation, thus to avoid unnecessary loss; • During testing process, if the instrument indicates that the power is too low, please replace the battery in time to avoid the measurement error caused by the voltage is too low; • If the device...

Chapter 2: Brief Introduction of Host Machine, Keyboard and Display 2.1 Introduction of the host machine Picture 2-1: SVLD 1 Valve Leakage Detector (AE) host machine Picture 2-2: Sensor Sketch Map

2.2 Keyboard introduction The keyboard of the leak detector is shown in picture 2-3。 Keyboard Introduction: ：” On/off” ，press it for 2 seconds to turn the instrument on, at the same time it performs the self-inspection; once under the testing condition, press it for 2 seconds to turn off the instrument. Press this button only for short time, turn on or off the screen backlight. ：Under the test interface, press this key to quickly switch and select the gate. Press this key in the menu interface to select or change values up. ：press the key to enter the menu list, in the menu list can do setting...

：In the test interface, press the key to analyze the current test data FFT, display the FFT spectrogram, and press the key again to exit. Press this key in the menu interface to perform the left selection operation。 ：In the test interface, press the key to test, and the results are displayed on the screen. Press this key in the menu interface to perform the confirmation operation。 ：In the test interface, press the key to save the current test results, and the data is stored according to the valve number with time mark. Press this key in the menu interface to perform the operation of right selection。...

Primary and secondary alarm limits tested parameter display The reference leakage is obtaned by converting the tested parameters Sleeted filter, samplng rate quantity of calibrated samplng no Spedfic tested value - FWtMaMltitll M*kjW Picture 2-4: Test interface diagram

Chapter 3: Menu and display This chapter will introduce the menu functions and Settings Press the menu interface, including four options: valve, calibration, save and set, as shown in picture 3-1. 3.1 Valve Enter the valve option to view the valves that have been set for the current instrument, and to add or duplicate the valve number as needed (change valve number), and to delete specified valve number. Picture 3-2：Valve options related to operation

3.2 Calibration Enter the valve calibration option to select the specified valve sampling rate and filter, and at the same time, perform the calibration operation (detailed in chapter 4). According to the same valve, up to eight calibration curves can be set (namely, a total of eight sampling rates and filters be matched). And the calibration curve can be added or deleted. Picture 3-3：Calibration related operation

3.3 Save Once enter the save, user can check and see the measured data and alarm data, and check the total memory space and available space. Picture: Saving related operation

The setting options include basic setting, alarm setting and factory setting, in which the factory setting is used by the manufacturer for debugging, and the operator does not need to change it. • Enter the basic Settings option and change the following Settings: • Date and time, once the data is stored, the current time is also stored for easy looking up; • The key sound and backlight can be turned on or off • Unit can be set as the display unit of leakage amount: mL/min or L/min; • Language options can be switched between Chinese and English; The power-saving mode can be turned on or off. The...