SANWA N-501 Rotary SW Type Ultra Sensitive Tester (175X215X100)
An ultra-sensitive tester that uses a 2 µA meter. The internal resistance is 500kΩ / V DC, which is comparable to Barbol. In AC, the input impedance is 1MΩ and does not change in any range. Adopting an integrated SW rotary plate, the measuring range is well balanced and accurate measurement (reading) of voltage from minute to high voltage is possible.
The batteries are 006p and Type C batteries, which are relatively easy to obtain.
The board that looks like a printed circuit board is a rotating SW board and the wiring of the parts is a lead wire method. It is a tester with a well-designed SW cut. Interval split is a new flow in series 3-6.
However, this tester is a little iffy when considering usability. Due to the high sensitivity meter, the meter's responsiveness is poor and takes time to measure. This lacks the characteristic of analog testers, which is that they can accurately measure slowly changing voltages. Furthermore, the subdivided measurement range (especially the current range) appears to have been over-engineered from the standpoint of how to use the tester. It can be said that it is a product that is very aware of the "highest peak of analog testers".
The function I want from a tester is "a measuring machine that can be used easily, quickly and easily".
This tester has five sibling testers that are very similar in shape.
There are 5 models, N-101, N-201, N-301, N-401 (N401F), N-501 (N501D), but I haven't seen the N-201 yet. Therefore, it is not clear whether the shapes are similar. Please take a look at the other brothers.
DC / V 60mV, 0.3.1.2,3,12,30,120,300,1.2k (500kΩ / V)
DC / mA 2μ, 0.3.1.2,3,12,30,0.12A, 0.3A, 1.2A, 12A
AC / V 3,12,30,120,300,1,2k
AC / A 1.2A, 12A R / Ω X1, X10, X100, X1k, X10k, 100k dB Magnification function Memory, polarity switching SW Battery used Single 2X1 006p / 9V
About the N-501D type
N-501 has N-501D.
The big difference is the ability to switch to a zero DC central meter. Even in the low AC voltage range, it can be read on the same scale as the uniform DC range. Along with this, the design of the meter panel has been changed.
Used batteries can also be used with AA 2X1 only.
There is little difference in other features. These are not confirmed in kind by the catalog investigation.