Digital Line Tester
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.
Features and Benefits
Full-range numeric line resistance measurement with display
Continuous and button-based measurement modes
Resistance measuring ranges
0 - 999 and
1000 - 1999, automatic range selection
0.1Ω for 0 – 999 Ω range
automatic range selection
1Ω for 1000 – 1999 Ω range
±0.5% or ±0.1 Ω, whichever is higher
Line testing current (max)
3 x 1.5V AAA batteries
–20 to +50
140 x 69 x 34