Surface Resistance Tester

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Introduction：
It is simply operated. The user just need place tester on the surface of tested items, and directly read the figure indicated via LED lights. The testing method follows the ASTM D-257.

Specification:

Size	137(L)76(W)30(D)mm
Weight	120g
Accuracy	±1/2 decade
Repeatability	±5%
Testing Voltage	9V
Working Temperature	0℃-50℃
Working RH	0%-90%

Q: How can a multimeter measure the quality of a transformer on a circuit board?: All the primary and secondary windings are not broken. Generally small power step-down transformer, primary coil fine and many, and therefore easy to break, secondary is coarse and less, rarely will break.

Q: The difference between DC resistance tester and loop resistance tester: Loop resistance tester: the test current is generally in the 100A and 200A, used for measuring high voltage switch and loop resistance load switches, directly reflect the contact switch contact, using 100A or 200A test current can be avoided due to effect of the oil film and the dynamic and static contacts between the oxide layer, the measured resistance too many times, the true value of loop resistance cover.

Q: Can you tell me the advantages and disadvantages of the multimeter and the direct current bridge for measuring resistance?: The bridge is accurate.Multimeter is two wire, four wire bridge should be, can eliminate the measurement of small resistance test, resistance, multimeter doesn't work. You can look at both two-wire and four wire testing methods

Q: What are the direct resistance and loop resistance? What are the differences between the two? Why should they be measured? How to distinguish between DC test and AC test?: The difference between the two is that the device object of the test is differentThey are measured to determine whether they have short circuits or open circuits and poor contactThe equipment used in the DC test and the AC test is different

Q: How can I use a resistance meter?: Resistance measuring instruments generally use the four line Kelvin test, the V+, I+, the resistance to be tested at one end, V-, I-, and then the other end, and then select the appropriate range for measurement. BFZD10 DC low resistance tester 10A, professional resistance test manufacturing

Q: How does a multimeter measure the quality of a computer motherboard? How to repair it?: A multimeter isn't everything. A simple question may be more than a test

Q: What instrument is used to measure insulation resistance?: An ohmmeter for an ohmmeter

Q: The earth resistance tester is an instrument for measuring the insulation resistance of a line, isn't it?: Because of the grounding resistance are relatively small (less than 0.1), and the insulation resistance are relatively large (minimum in 1M, can reach the maximum of 500M or even infinite), because the ground resistance tester can test the insulation resistance, insulation resistance measurement using insulation resistance meter (megameter) to measure.

Q: How to test DC resistance: Start measurement: DC resistance instrument in the press the "measure" button after the start of the measured winding charge, and display the following interface display central display area will be the emergence of a charging progress bar, progress bar above the current value of the current, generally in the measurement of inductance load, the current to stabilize to a certain period of time, the current value of the zero to the rated value rise. Note: if the charging progress of long time stagnation in a current value may not rise, winding resistance value of the current measurement range over the selected current, the current did not reach the predetermined value, please exit the measurement according to "exit" button, and then choose to try a small current, when the current reaches the rated value and the end of charging, direct resistance to the data sampling instrument to calculate. The monitor indicates that it is being measured. Please wait for a while. After the calculation, the resistance value will be displayed on the display. After the data is stable, you can press the storage key to store or press the print key to print the data.

Q: How to test the insulation resistance of the 10kV current transformer?: When measuring the non tested winding (or end screen), the shell should be grounded.

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