Ultrasonic thickness gauge standard thickness block calibration special standard circular tube

Ningbo Shenyan provides SY-C17-2Ultrasonic thickness gauge standard thickness block calibration special standard circular tube(including national metrology certificate), welcome to consult!

One Product Introduction

Ultrasonic thickness gauge standard thickness block calibration special standard circular tubeAccording to JJF/1126-2004, the standard thickness block for ultrasonic thickness gauge calibration, thickness test block for thickness gauge, and standard thickness block for measurement are the standard blocks used to test the accuracy of ultrasonic thickness gauge. The accurate measurement method is to take a standard sample that is the same as the tested material *, and the standard sample should be flat, smooth, and equal in thickness to the maximum thickness of the tested sample, in order to determine the sound velocity of the material. In order to prevent rusting of the standard thickness block, standard circular tube, ultrasonic thickness gauge probe, and randomly calibrated thickness block of the ultrasonic thickness gauge. After each calibration, the coupling agent should be wiped clean and a small amount of engine oil should be applied. After wiping the oil clean when using it again, normal calibration work can be carried out. Ultrasonic thickness gauges are calibrated using standard thickness blocks and standard cylinders. The standard circular tube is the standard device for detecting ultrasonic thickness gauges. In situations where the influence of sound velocity on the measurement results is not high, the sound velocity obtained from various sources can be used for measurement.

II Product Specifications

17 standard thickness blocks and 2 standard circular tubes are used for the calibration of SY-C17-2 ultrasonic thickness gauge, including the following:

1. Standard thickness blocks (17 pieces): 0.5, 1.0, 1.2, 1.5, 2.0, 3.3, 5.5, 7.7, 10, 15, 20, 25, 50, 75, 100, 150, 200mm

2. Standard round tubes (2 pieces): 30 * 40 * 2mm, 40 * 40 * 3mm

III Instructions for Use:

1. Insert the variable indication probe into the instrument body, apply the coupling agent to the measured end face of the 5.5mm standard thickness block, measure the standard thickness block with the probe, and adjust the sound speed fine adjustment knob to adjust the indication to 5.5mm. After the display is stable, repeat the measurement of this position for 10 consecutive times, and record the indication for each time. The difference between the Zda value and the Z small value is the variable indication, which should meet the technical requirements.

2. The indication error is first corrected by using a 5.5mm standard thickness block and an ultrasonic thickness gauge standard thickness block that is half of the upper limit of the instrument measurement as the indication correction for the high and low ends of the instrument. Measure these two thickness blocks separately using a probe. If the indicated value does not match the nominal value, adjust the starting point adjustment screw when calibrating the low end, and adjust the sound speed fine adjustment knob while calibrating. Measure and adjust repeatedly until the indicated values match the nominal value. Instruments with measurement ranges divided into several levels should have their readings calibrated separately for each level.

3. Low end calibration adopts the measurement lower limit of each level, and the calibration points are divided into: if the measurement upper limit of this level is less than 50mm, it shall be calibrated according to the measurement upper limit; For measurements larger than 50mm, calibrate at 1/2 of the upper measurement limit. After calibration, according to Table 4 of JJG403-86, the indication error of the instrument shall be verified. During calibration, the probe shall be placed at the ZX position of the standard thickness block for three consecutive measurements, and the arithmetic mean shall be taken as the indication of the instrument at that point.

4. Range and indication jump of sound speed fine adjustment: Rotate the sound speed fine adjustment knob clockwise or counterclockwise to the limit position, and use a probe to measure a standard thickness block of 5.5mm. At this time, the instrument indication should not be greater than 4.5mm (or less than 6.5mm). Then hold the probe still and only slightly move the speed adjustment knob to the reverse limit position. At the same time, observe whether the instrument can gradually increase by 4.6, 4.7, 4.8,..., 6.5 at intervals of 0.1mm. When the probe is moved to the limit position, the instrument's reading should not be less than 6.5mm (or should not be greater than 4.5mm). After the verification is completed, return the sound speed fine adjustment knob to the position where the displayed value is 5.5mm.

4 Precautions for standard thickness block of ultrasonic thickness gauge:
a. When the power supply voltage is low, a low voltage symbol is displayed on the left side of the LCD screen. In order to ensure the normal measurement and use of the instrument, please replace the battery in a timely manner.
b. When the backlight is not needed, try not to turn it on for a long time to avoid consuming battery power too quickly.
c. The surface of the sensor is made of acrylic resin, which is sensitive to rough surface scratches, so it should be lightly pressed during use.
d. After measurement, try to clean the coupling agent on the surface of the sensor and the standard thickness block of the ultrasonic thickness gauge as soon as possible, and clean the coupling agent on the surface of the measured object.
e. The surface temperature of the object being measured should not exceed 60 degrees to avoid causing the sensor to fail to measure properly.
f. When the instrument is not in use for a long time, the battery should be removed to avoid battery leakage and damage to the instrument.
g. Try to avoid oil stains, moisture, and collisions as much as possible.
h. When plugging and unplugging sensors, hold the movable cover and apply force along the axis. Do not rotate the sensor head to avoid damaging the sensor cable core.