【Function
and Purpose】
Shengli
SL-58 digital electrical spark leakage detector is a dedicated device to test
the construction quality together with micropores and air gaps due to aging and
corrosion of coatings on such metal surfaces as oil and gas pipelines, cables,
enamels, metal tanks, and ship hulls.
【Characteristics】
1.
The all-in-one microelectronic high-voltage generator is used to avoid static
electricity;
2.
Digital display, to improve output accuracy;
3.
Automatic changeover between high voltage and supply voltage;
4.
Quick and smart charging, full stop, without manual control;
5.
Adoption of the original Japanese microswitch power supply, to improve
performance and reduce weight;
6.
Equipped with protection systems against static-electricity and high-voltage
misinput to promote reliability of the device;
7.
Specially provided with protection and automatic adjustment functions, without
the Achilles’ heel of its counterparts;
【Primary
Technical Parameters】
1.
Measuring range: type A: 0.03-3.50mm; type B: 3.50-10.0mm
2.
Output high-voltage: type A: 0.50-15.0KV (epoxy coal pitch); type B:
15.0-36.0KV (petroleum asphalt)
3.
AC supply voltage: 220V±25%
4.
Built-in DC voltage: type 58A: 6V; type 58B: 8.4V
5.
DC power consumption: ＜5W
6.
Time of automatic changeover between AC/DC: ＜0.01 second
7.
Alarm delay: 1-2 seconds
8.
Main frame volume: 228×85×180
9.
Main frame weight: 2.5kg (battery included)
【Detection
Principles and Methodology】
The
resistance and the air gap density are very small at under coating,
metal-exposed, and leakage micropores on the anti-corrosive and insulative
coating of metal pipes, so when the high voltage passes through, the gap
breakdown forms to generate spark discharge, giving out a pulse signal to the
alarm circuit, and the alarm sounds with light. That’s how the digital electrical
spark detector conducts leakage detection on the anti-corrosive coating.
