ROM consists of two blocks:

• Ohmmeter with radio transmitter

• Receiver and alarm unit

The ohmmeter with transmitter is connected to the blasting line. Ohmmeter measures the line resistance, shows the value on backlit LCD display and transmits resistance value wirelessly to the receiver. Ohmmeter unit can be used separately as digital line tester without the receiver.

Receiver shows the line resistance on its LCD display in real time. If the resistance of the blasting line changes by more than +/- 3 ohms, both a visual and an audio alarm will activate and work can be stopped immediately to check the line.

For safety reasons, the measuring current is limited to 1mA.

Features and Benefits

• Highly accurate

• Large LCD display with a backlight

• Wireless connection between ohmmeter and receiver