Clinton DC-1, Инструкция по эксплуатации, Страница: 10 / 58

Models DC-1, -10, -20B DC Spark Testers
DC-1, -10, -20B Instruction Manual – Page 9
Avoid the Risk of Fire!
Every time your wire line stops, be sure that the HV in the electrode goes off. If
the HV remains ON while your wire line is stationary, the wire insulation within
the electrode will heat and there is a danger of combustion. Refer to the table in
“Installation” labelled “Terminal Block connections,” under HV Enable on how to
safely install your spark tester.
Caution: Pacemaker Warning
Clinton Instrument Company strongly advises any individual using a pacemaker
or other such medical device to avoid operating or being in the vicinity of spark
testers. Current studies indicate that such medical devices can malfunction in the
presence of electrical and magnetic fields. When a fault occurs in the electrode
of a Clinton spark tester, both high and low frequency electromagnetic fields are
generated. The strengths of these emissions are unknown, since they depend on
test voltage and other variables. The danger is greater when a customer does not
ground the inner conductors of a test product. While Clinton cautions its cus-
tomers to ground the test product for safety reasons, many times this warning is
ignored. In this situation, both the spark tester and the entire length of the wire
line will radiate these emissions. There is also a serious risk of electrical shock if
an individual comes into contact with an ungrounded test product.
Email:
support@clintoninstrument.com .
Electrical Shock Hazard from Production Line Spark Testers
By Henry H. Clinton
The commonly accepted maximum values of 60Hz. current passing through the
human adult body which permit a subject to let go of electrodes are nine
milliamperes for males and six milliamperes for females. At 3000 Hz. this value
increases to about 22 milliamperes for men and 15 milliamperes for women, DC
currents do not present the same let-go problems, but a subject can readily let go
at a level of 60 milliamperes. A continuous 60 Hz. current above 18 milliamperes
stops breathing for the duration of the shock only. Ventricular fibrillation may
occur above a level of 67 milliamperes. The reaction current level of 60 Hz. is
about .5 milliamperes. Above this level a muscular reaction can occur which can
cause a secondary accident. The DC and 3 kHz. Levels are probably considerably
higher. Capacitor discharge energy of 50 Joules (watt-seconds) is regarded as
hazardous.
Clinton DC spark testers are current limited to 5 milliamperes or less. Three
kilohertz spark testers are limited to 4 milliamperes or less, and 60 Hz. types to 7
milliamperes. Impulse spark testers can deliver a maximum charge of about .2
Joules 248 times per second. All these spark testers have current outputs above
the reaction level, but none above the let-go threshold level. Because of the