What are the five specific criteria for the correct selection of test leads and pogo pins?

What are the five specific criteria for the correct selection of test leads and pogo pins?

Anyone who has ever measured and tested knows that accurate data depends on the design and measurement capabilities of the test instrument. But few people know that the design quality, manufacturing process, matching and performance specifications of test leads and connectors are just as important as test instruments. Next, follow the editor to focus on five specific criteria for the correct selection of test leads and pogo pins:
First, security:
Like the requirements of the power supply, the instrument test leads and pogo pins must meet strict safety level requirements due to their direct contact with large voltages, especially the requirements of the international IEC1010 voltage and category, i.e. CATI, CAT II, ​​CAT III or CATIV. Other requirements of IEC1010 also involve transient testing, dielectric withstand voltage, or testing to verify that the product has adequate insulation and meets requirements for current, electrical clearance, exposed metal pogo pins, and shock resistance. Good quality test needles, along with important personal protective equipment such as gloves and eye protection, form part of the personal protective measures defined in the NFPA70E standard.

Second, sturdiness and durability:
High-quality test leads and connectors won't degrade from everyday friction like pulling, pressing, and puncturing. Both ends of the test leads should have well-designed strain relief jackets. Test pogo pins should be hardened metal to withstand repeated connections and deliver accurate data every time.
Specially fabricated stranded tinned beryllium copper wire provides flexibility, long-term durability, superior conductivity and precision compared to inexpensive materials. Other factors include the quality of the soldering inside the pogo pins and headers and the temperature range of the material.

Third, design performance and indicators:
It is important to test the comfort of the design of the pogo pins and test clips. A comfortable, easy-to-grip grip surface helps keep the needle firmly in hand, and a strong spring clip ensures a secure connection. Connections should be easy and mating parts should slide together effortlessly without stress. The contacts on a quality connector should be nickel- or gold-plated machined brass connectors, not just cast brass. The use of gold-plated contacts provides accuracy and oxidation resistance for a durable, safe and reliable connection.
The design index of the test wire and pogo pin should be consistent with the matching test instrument. If the index is smaller than that of the test instrument, the real value of the instrument will be greatly reduced. For example, the bandwidth of the oscilloscope is 100M, and the bandwidth of the matching oscilloscope needle is only 50M, then the oscilloscope becomes 50M.

Fourth, high-performance applications:
From fine, lightweight tips with spring-loaded pogo pins and test tips for electronic circuits, to sharp stainless steel pogo pins and robust tips for industrial use, today's tips are designed with different applications in mind. Example: Single-point needles are the most common form of needles. Most meters provide single-point test leads that are useful for a wide range of test applications. Sharp pogo pins are the best tool for measuring very small contact points on high density circuit boards. Although they are easily damaged, pogo pins can usually be re-sharpened because there is no plating on them.
The needle with retractable pogo pin is connected to a very thin diameter stainless steel wire. Except for the very end of the needle, the entire wire is covered with an insulating layer to prevent accidental contact resulting in short circuit and damage to the chip. The hook clamp spring thimble is suitable for a stay-in-place connection for easy hands-free operation. Test clips of different sizes are available for easy testing of IC chips. IC test clips are ideal for probing multiple pins on an IC chip. They are ideal for finding one of many chip leads. SMD headers enable precise point testing on surface mount boards (SMDs) that require the use of very thin and sharp pogo pins to precisely touch points on very small boards, such as the MINIGRIP-XB/100 Mini Test Pliers . Micro SMD clips are designed to hold fine pitch pins on SMD chips. BNC patch cords (short patch cords with tiny wires) make it easier to test signals from board mounted RF headers.

Fifth, test line test line connection connector:
Test lead connectors are available in various applications and standard plugs and sockets according to standards, safety and practical needs. For example, oscilloscopes are BNC connectors, multimeters are 4mm banana connectors, spectrum analyzers are N-type connectors, etc. Different applications have different connectors. In order to match each other, there are various adapters (coupling) on ​​the market. Adapters), adapters (adapters), adapter cables, connecting cables, branch cables, etc.

To sum up, these are the five specific criteria for the correct selection of test leads and spring thimbles described for you today.