TQC LD8100, Руководство пользователя, Страница: 10 / 24

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3.4 Storage and Protective Measures when not in use
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of time.
4. DEVICE
The TQC Low Voltage Pinhole detector enables you to inspect various coatings on conductive
substrates for small defects such as holidays and pinholes using the ‘wet sponge technique’
The grounding clamp shall be connected to an untreated piece of the substrate(which is electri-
cally connected with the measurement area), where the wet sponge will be used to probe the
entirety of the coating with the selected voltage applied. When current flows from the sponge
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using the selected feedback method(s). (Buzzer, vibration, headphones and/or display)
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vely wet or otherwise contaminated surfaces are unreliable.
The TQC Pinhole Detector is available in two models:
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LD8100 TQC Pinhole Detector Basic 9 VDC - 90 VDC
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The number of detected pinholes is stored in memory, and remains available after power down,
even when replacing batteries. This memory can be cleared by the user.
4.1 Ground connection detection
The TQC Low Voltage Pinhole Detector uses a high frequency earth clamp
detection. This provides the user feedback if the earth clamp is connected
properly. It also prolongs the battery life because the power is turned off
when there is no earth detected, thus reducing the risk of electric shock.
As a side note to this technique it should be mentioned that the reliability of this detection
depends on the circumstances in which the TQC Low Voltage Pinhole Detector is used.
EN