Su. Bhaskar Instrument Service

We have bring forth an optimum quality range of Pin Hole Detectors. Ideal for identification of premature corrosion of a substrate, these devices are low in maintenance and offer accurate results. More details are mentioned below:

Device Structure:

• The Instrument generates 90 V DC.
• Negative end of this supply is connected to substrate.
• Positive is connected to the moistened sponge brush.
• When the sponge is moved over a pin hole, solution penetrates the flaw and feeble electric current flows to the substrate and completes the electrical circuit.
• This generates Audible and Visual Alarm.
• Test voltage 90 Volts is generated using Inverter circuit.
• The circuit operates on rechargeable stack of cells.

Operating Instructions:

Testing the Instrument (For 90v Only).

• It is necessary to confirm that the Pin hole Detector is functioning properly
• To test 90 Volts operation, switch ON the instrument by using slide switch
• This results in some reading on digital display
• Set 90.0 volts on display by using Select Voltage push button

Now instrument is ready for 90 V operation. (Same procedure is to be followed for 67.5V & 9 V)

• Plug in Sponge Brush to BRUSH TERMINAL
• Using green wire connect Earth Terminal to substrate
• Move soap-solution soaked Sponge Brush on the coated surface
• When the brush encounters a pin hole in the coating instrument gives both Audible and Visual (Red LED) alarm
• This point is marked for repairs

Glowing green LED on instrument indicates that battery inside the instrument needs charging.

Testing The Job:

• Connect the Moist Sponge Brush to the receptacle on top side of the instrument.

• Connect the cable for return current path to terminal marked as PIPE.

• Clip the Crocodile to substrate (generally bare pipe.)

• Set the Test voltage as described above

• Now move the brush over the coated surface

• Mark the area where alarm starts, if any

Charging The Battery:

The Charger is connected through jack to the instrument.

• Insert charging cord to charging socket on the instrument.

• Connect the charger to 230V AC supply.

• Switch on the mains supply of charger. The charging is indicated by RED LED.

Important notification:

• The Battery should be charged every night

• Even when the instrument is not in use, the internal Battery should be charged at least once a week

• After complete discharge of the battery, it needs to be charged for at least 8 hours for Full Charge of the battery