30
Frequently Asked Questions
Item
Question
Response
Common to
every
ionizer
In what kind of situation is the a-contact (NO) and
b-contact (NC) switching function used?
What is the method for switching between the a-contact
(NO) and b-contact (NC)?
What is the method for measuring the static charge
removal time?
Are you in compliance with the RoHS directive?
Is ionizer performance related to humidity?
In the connector pin configuration, should the output
contact point be connected to #1 or #2?
Are connector pin #4 (power GND) and the ground
terminal shared?
Can nitrogen be used for ion carrying media?
Is a power cable longer than 2 m [6.56 ft.] available?
What is the operating life for the discharging needle?
What is the method for cleaning the discharging needle?
What are the foreign particles that accumulate on the tip of
the discharging needle?
If maintenance is performed on the discharging needle,
can the operating life of the ionizer be extended?
Can the ionizer be used in explosive atmospheres?
When positive ions are used to elimenate charges on a
negatively charged workpiece, what happens to the
negative ions?
Can the AC adaptor (DTRY-ELC04) be used overseas?
Can the AC adaptor (DTRY-ELC04) be used with all
ionizers?
The a-contact outputs only when an ionizer alarm occurs.
The b-contact outputs at normal times, and output is cut
off when an alarm occurs. Output is also cut off when the
power cable is disconnected. As a result, select the
contact to suit customer’s application conditions. Contact
activation modes are noted in the user’s manuals provided
for each product. See the manuals for details.
A selector switch is used to switch between the contacts.
To turn the switch, use a precision screwdriver or similar
tool. After switching, cover the switch with the protective
seal provided to prevent operators from touching it by
mistake.
The
□
150 mm [5.91 in.], 20 pF charged plate monitor is
used to measure the decay time from
±
1000V
→±
100V.
(Measured using Koganei measurement conditions. The
measuring instrument conforms to IEC61340.)
All Koganei brand products are in compliance with the
RoHS directive. There are no model changes required to
achieve RoHS compliance.
Since the blow type performance is affected by the
supplied compressed air, the environment has little effect
on it. The fan type, however, is susceptible to the effects of
the ambient environment, so environmental humidity must
be carefully maintained for its use.
Since there is no polarity, the connection may be linked to
either one. (However, caution is required for products
DTRY-ELB0
＊
models of not CE compliant, since they do
have polarity.)
They are shared, and are internally connected by circuits.
Since the nitrogen ion balance tends to tilt heavily toward
positive, the performance is unstable.
No longer-power-cable is available. Please use your own
for extension.
While it depends on the operating conditions and
environment, a rough guide for use is 10000 hours.
If black or white contamination has accumulated on the tip
of the discharging needle, use a cotton swab soaked in
alcohol or the brush provided with the fan type to wipe it
away. (See pp. 9-10.)
Discharging on the tip of the discharging needle attracts
nearby foreign particles and incinerates them, resulting in
accumulation of carbon, silica, or other substances.
Maintenance of the discharging needle and the area
around the discharging needle is performed to restore
them following deterioration of performance. It does not
serve to extend the operating life of the ionizer itself.
Corona discharges are induced when ions are generated,
and since it could ignite in a flammable gas atmosphere,
the ionizer cannot be used in such locations.
Negative ions are repelled by the negative charge in the
workpiece, and dissipate into the air. After that they are
neutralized as they link up with ions in the air.
The 100V
−
240VAC can. Be sure to have an outlet
conversion adaptor available.
The DTRY-ELC04 can be used with all ionizers other than
the air gun type (DTRY-ELG01). For the DTRY-ELG01,
Koganei has the DTRY-ELC04-140W available as an AC
adaptor.
