Video of IK Pendulum Impact Test Apparatus

Vedio of IPX12 waterproof testing rig

If you find any interesting, visit our website http://www.pegotester.com/IEC60529_IPX1_IPX2_drip_box.html#_jcp=3_2 and contact me sales@pegotester.com.

Introduction for Ground Continuity Test - Pego Group

1. Importance of ground continuity test

Nowadays, the manufacturers of electric and electronic equipment must try best to ensure the safety of the user, and protect the user from electric shock even any fault operation. To reach this public requirement, ground continuity tester must be applied. At the moment, most electric safety execution institutions like UL, CSA, IEC, BSI, YDE, TUV and JSI are requires the manufacturers to do the ground continuity test during the design and production periods.  

2. The AC ground continuity test

Ground continuity tester is applied to test the resistance between earth cable and enclosure according ohm law. Current flow through contact point, test the voltage values of current and contact point separately, then calculate the resistance value according to ohm law. Generally, flow through a big current, the abnormal current caused by simulator under abnormal conditions would be the test standard. If the contact resistance of ground cable can pass the test under bad conditions, the equipment should be safe in the normal conditions. The electronic equipment must do the AC ground continuity test with the following conditions:

a) Function test during the design--- To ensure the new product can reach the demand.

b) Specification test during production--- To ensure the finished product can meet the requirement.

c) Quality test during QA--- To ensure the quality can meet the standard requirements.

d) Safe test after maintenance--- To ensure the product can meet the standard requirements after maintenance

Different products have different technical specification, basically, it would requires a constant current flows through contact point, and keep for a certain time. For example, the resistance of contact point keeps in the normal range during the specify time, then the equipment would be thought as safe when operate in the normal condition. Reasonable design can protect the user from dangerous of accidental electric shock.

Although the contact resistance can be tested by ohmmeter, the ohmmeter can only output small current, which can not meet the standard requirement, and can not be accredited by inspection institutions, ground resistance meter is a must tool. For electronic equipment can often be touched, 30 amp is required by CSA to do the ground resistance test, 25 amp are required by most institutions, like UL, BSI, TUV, VDE and etc. and the resistance of contact point must be lower than 100 mΩ, current must keep for 60s and resistance must keep below 100 mΩ. For electronic equipment can be hardly touched, generally, it will requires 10 amp and resistance must keep below 100 mΩ, and still keep for 60s.

Internationally, some specification would higher than standard, the rated input current requires 5 times of the standard, and resistance of contact point should be 100 mΩ and keep for 60s. Mostly, the motor requires the more strictly test. At the moment, for special demands, ground resistance test should be the priority, the dielectric withstand voltage and insulating resistance test should be done upon pass the ground resistance test.

The ground resistance test has two types, AC and DC, although both type are allowed, but AC ground continuity test is especially recommended.

Pego is specialized in electric safety test equipment, recently, we have ground resistance tester, withstand voltage tester, insulating voltage tester, leakage current tester, LCR meter and DC electronic load.

Operation Vedio of Lightning Surge Generator

About Blue Light - Pego Group

1. What is bule light?

Blue light does not refer to blue light, but refers to high-energy short-wave blue light with a wavelength between 400nm and 480nm, which has extremely high penetrating power. The blue light in this wavelength will increase the amount of toxin in the macular area of the eye, the death of light-sensitive cells, the gradual decline of vision, and even induce blind eye disease, which seriously threatens our fundus health. Blue light can be seen everywhere in daily life, but the proportion is generally within the normal health range, and has little effect on vision. Long-term exposure will make people’s eye feels burning, and it will be difficult to recover from the eyes.

2. Where does blue light come from?

Blue light exsists in a large number of artificial light sources such as LED screens, LED lights, and fluorescent lights. For example: mobile phones, computer monitors, fluorescent lights, LCD screens, LEDs, etc.

3. How can we detetor the blue light?

OHSP350B blue light hazard tester is a special equipment to fast detect, measure, screen and compare the blue light at site. Detection: quickly detect anti-blue light effects; Measurement: LCD displays measured values in real time; Screening: screen different anti-blue light functions; Comparison: Differentiate anti-blue light levels.

Salt Spray Test

Salt spray test is a kind of environment test which adopts a salt spray chamber to simulate a salt fog conditions to evaluate the performance of corrosion resistance. The reference standards includes GB/T2423.17, IEC60068-2-11, ISO4628-3, ASTM B117, JIS-Z2371, JIS-G3141, GJB 150.1, MIL-STD-810F, MIL-STD-883E and etc.

Corrosion is a damage or metamorphism caused by environment, most of corrosion happens under the atmospheric environment, the corrosion factors includes oxygen, humidity, temperature change and pollution, salt-spray corrosion is a usual and most destructive atmospheric corrosion, the corrosion composition is Nacl, it comes from ocean and inland saline.

The salt spray test includes neutral salt spray test (NSS), acid salt spray test (ASS) and copper accelerated acetic acid salt spray test (CASS):

1. NSS test is the most widely test method, it adopts 5% salt water and the solution’s PH value is around 6 to 7.

2. ASS test is developed base on NSS, it requires to add glacial acetic acid into the 5% salt water, and the solution’s PH value is around 3, the corrosion speed is 3 times faster than NSS test.

3. CASS test is the newly fast test method, it requires to add a bit of Cucl, the corrosion speed is 8 times faster than NSS test.

The technical specification includes solution concentration, R.H., temperature, test time, storage time, test period, fog quantity and PH value.

Salt spray test chamber made by Pego has good quality, the material of the body adopts PVC plastic board with features of aging resistance and corrosion resistance; the lid adopts full transparent acrylic board with feature of shock resistance and freely to observe the test procession; Saturated air barrel adopts SUS304 board to provide humidity and temperature according to Henry law. Contact us to get the quotation.

The Function of Hand Held Spray Nozzle for IPX3 and IPX4

Spray nozzle is a kind of equipment for IPX3 and IPX4 testing, differs from oscillating tube, the water sprays from round sharp nozzle.

The main parts for the spray nozzle are nozzle and baffle. The material of the nozzle is brass for the purpose of corrosion resistance and precision. There are totally 121 holes, 1 center hole, 2 inner circles have totally 24 holes (12 holes/circle), the interval is 150, 4 outer circles have totally 96 holes (24 holes/circle), the interval is 300. The material of the baffle is aluminum, and it is mobilizable in order to control the watering area. When the nozzle is covered, it means IPX3 testing, when the nozzle is uncovered, it means IPX4 testing.  

Spray nozzle is usually applied to the samples with big enclosures, it is regarded as the auxiliary equipment for oscillating tube rain test. The oscillating tube is not enough to reach the big equipment, so a hand-held device is needed. The pressure should keep in the 50~150kpa during the test, the test time depends on the enclosure area, 1SQM/min, at least 5 min.

Application: cabinet, washing machine and etc. Pego has full sets of waterproof test equipment, please contact to get more information.