Hioki 3550 - Leads

3550 Battery HiTESTER Series
7
Q2. Can maximum allowable input
voltage be increased?
A2. This is a frequently expressed request for the
3550 and 3551. However, for reasons of
safety and because extensive parts
modifications would be required, it is not
possible to increase the rated maximum input
voltage of the 3550 series models. The 3551
has passed overload tests up to 400 V DC.
When a voltage of about 330 V or more is
applied, an intermittent warning tone will be
heard. However, when high voltage is
applied, sparks are produced when the input
coupling capacitor is charged, which can be
dangerous. The rated maximum input
voltage therefore is 60 V DC.
Q3. What type of damage will occur
for various types of mis-
operation?
A3. If AC voltage is input, depending on the
amount of voltage, the surge absorber will be
damaged, and the fuse will be damaged (once
the design change for adding the fuse is
implemented).In some cases, the A/D
converter will also be damaged. If
overvoltage is input, the capacitor and surge
absorber will be damaged. If a battery is
inserted with reversed polarity, the battery will
leak and the power supply circuitry will be
damaged.
5
Leads……...…………...……………………………………………
Q1. Will the spring pressure of the
9460 be increased
?
A1. Compared to when the product was initially
released, the diameter of the spring has been
increased, resulting in greater strength.
Q2. Will the tip of the 9461 pin be
made rounder? A
nd will the
spring pressure of the pin tip be
reduced?
A2. The pin tip has been made rounder, and the
spring pressure has been reduced. As a
result, the tip will be less likely to damage ba
ttery terminals.
Q3. Will the tip of the 9461 pin be
made thinner?
A3. The 9174- 02 semi- standard product can be
used with the 3550 and 3555. However,
because the probes are not red and black, the
user must mark them by wrapping them with
red or black tape, as appropriate. In addition,
the 9461 can be modified for special orders.
However, because pin tip 1172 is a four-
terminal probe that was developed for in-
circuit testing, it offers extremely high
accuracy, but is susceptible to damage when
used manually.