Dosimeters and Radiation Detectors
Dosimeters and Radiation Detectors
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ROM
Remote Ohmmeter
ROM is a remote ohmmeter for safe and convenient measurement of the blasting line resistance.
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
Technical Specifications
Metric
Units
Value
Resistance measuring range
Ω
0 – 999 and 1000 – 1999 ,
automatic range selection
Measuring resolution
Ω
0.1 Ω for 0 – 999 Ω range
1 Ω for 1000 – 1999 Ω range
Measuring accuracy
%
±0.5% or ±0.1 Ω, whichever is higher
Line testing current (max)
mA
1
Power supply
Ohmmeter: 3 x 1.5V AA batteries
Receiver: 3 x 1.5V AA batteries
Battery life
Ohmmeter: 100 hours
Receiver: 100 hours
Protection level
IP67
Operating temperature
°C
–20 to +50, at 100% relative humidity
Weight
kg
Ohmmeter: 0.34 (with batteries)
Receiver: 0.34 (with batteries)
Dimensions
mm
Ohmmeter: 170 x 88 x 33
Receiver: 145 x 88 x 33