Products > Test Equipment
LCR Tweezers test and analysis (HP-990, DT71, ST5S...)
Electro Fan:
--- Quote from: indman on February 02, 2021, 03:15:28 pm ---
--- Quote from: Shannon on February 02, 2021, 02:47:11 pm ---By the way, how much did you speed for HP-4070C, It doesn't seem to have that much stock
--- End quote ---
I do not understand what speed do you want to know? Please clarify.
--- End quote ---
That might have been meant to be “spend”.
Shannon:
--- Quote from: indman on February 02, 2021, 03:15:28 pm ---
--- Quote from: Shannon on February 02, 2021, 02:47:11 pm ---By the way, how much did you speed for HP-4070C, It doesn't seem to have that much stock
--- End quote ---
I do not understand what speed do you want to know? Please clarify.
--- End quote ---
FT... it's typing error :palm:
By the way, how much did you spend on HP-4070C, It doesn't seem to have much stock on amazon.
Shannon:
This is a good LCR tweezer, if you only spend 26 dollars, it can measure the general resistance and capacitance requirements, and it seems to be more friendly to SMT devices.
Well, it's time to say the disadvantages
1. The structural designer does spend a lot of effort on the appearance and structure, but it's hard to say that this is a beautiful tweezer, and the quality is not very good. There is a dedicated box to hold it, but the box is not so good-looking
2. This is a SMT tweezer, but it can only measure the devices that have been soldered on the PCB. Because it is very easy to clip the chip components, even 0805, which gives people a very unstable feeling to operate it carefully, and the tweezer's arm is directly soldered on the PCB. This is a convenient way to fix it, but it is not a high-strength way
3. The tip of the tweezers is not so sharp. Every time you measure the device on the PCB, you always worry about not touching it or slipping it off
4. In the natural state, the opening distance of the tip of the tweezers is too short, which is estimated to be 7mm, so it is not convenient to measure larger devices
5. The measurement speed is too slow. It takes 7 seconds to measure 10ohm resistance and 25 seconds to measure 100uF capacitance. OMG, life is short
6. PCB quality is not very good, there are many traces of manual change
7. Without the Kelvin test method, holding the tweezers arm in hand will affect the measurement results. The display value is about several picofarads, which is not so important for the accuracy of the tweezers
8. The quality of the probe is not good, the spec is 500V 10a, I dare not use it to measure high voltage, I have been shocked, I know the taste
Electro Fan:
Lots of HP-4070Cs on eBay (but don’t know about the sellers).
Another alternative on Amazon (but I haven’t compared the specs or performance vs the 4070C):
https://www.amazon.com/Mastech-MS8910-Resistance-Capacitance-tester/dp/B00F3RQCFW
indman:
--- Quote from: Shannon on February 02, 2021, 03:33:04 pm ---
--- Quote from: indman on February 02, 2021, 03:15:28 pm ---
--- Quote from: Shannon on February 02, 2021, 02:47:11 pm ---By the way, how much did you speed for HP-4070C, It doesn't seem to have that much stock
--- End quote ---
I do not understand what speed do you want to know? Please clarify.
--- End quote ---
FT... it's typing error :palm:
By the way, how much did you spend on HP-4070C, It doesn't seem to have much stock on amazon.
--- End quote ---
I spent about $14 on my HP4070C, but that was a few years ago. :) I will disappoint you a little - if you buy this model now, then 99% of you will receive exactly the same filling as the HP-990 model. HoldPeak has also started using chip caseless. But I know for sure that DM1106(upgrade DTM0660) is now installing UT-116C UNI-T into its model
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