Author: thomas

OOM-4 digital line tester can be used in conjunction with the blasting machines that do not already include a built-in line tester. OOM-4 is designed for safe testing the electric detonator lines and/or the connecting cables.

​

The line tester accurately measures the line resistance over the full range between 0 and 1999 Ω and includes an LCD screen that displays the readout. Momentary and also continuous measurement modes are available.

​

The continuous mode is initiated releasing the TEST button after 10 seconds and it lasts indefinitely. This is useful in situations where the detonator line can be affected for some time prior to the actual blasting moment, such as intentional covering of blasting charges.

​

For safety reasons, the measuring current is limited to 1 mA. The digital line tester is battery powered.

The Royex Pongo initiation machine is a compact, ultra-lightweight and easy to use blasting machine that fits on the palm of the user. It comes in a plastic cylindrical shell and includes a shaft button and two binding posts.​

​The firing line is connected directly to Pongo’s two binding posts. The energy for the blast is generated by firmly pushing the shaft button of the device; an external power supply or batteries are not needed. The device includes an R-type safety pin that prevents the release of the button until the operator is ready to initiation the electrical Maxfire or detonator.

​Pongo supports blasting of up to three Maxfire igniters or two Class 1 detonators in series, with up to 120 m total line length and 1 mm² cross sectional copper cable. The total blasting line resistance should not exceed 11 Ω.

​To test the line resistance, the Royex OOM-4 digital line tester should be used.

​Royex Pongo is a multi-use device and can be used up to 1000 times or more. After each firing the device can be readied again by pulling the shaft button up to the cocked position.