Safety ohmmeter / megohmmeter on pyrotechnical elementsThis safety ohmmeter / megohmmeter was developed to carry continuity and isolation measurements on pyrotechnical elements where user safety is at stake.
This safety ohmmeter / megohmmeter was developed to carry continuity and isolation measurements on pyrotechnical elements where user safety is at stake.
Two types of conditions define the user safety:
Measurement conditions:
Safety conditions:
The ohmmeter function is based on 4 wire measurement, which makes it possible to be freed from parasitic line resistance. The principle relies on an internal device of permanent self-calibration which guarantees, over a short and long-term period of time, the high reliability of the measurements carried out by continuously correcting the drifts of gain and offset.
Measurements start with an external input signal. The result of the measurement is internally processed to supply information whether the measured value is within tolerance limits set by the operator.
All parameter settings are entered by keyboard with a locking of the parameters by key. Our units are equipped with dry contact output and S232 connection that allows process automation and implementation of traceability.
On request, our existing products can be adapted to your specific requirements: Adapted protocole RS232, other testing voltage or measuring current, integration, processing software...
Two switching units (INT 17 and INT 17 HT for high testing voltage) are also available in option to interface the devices under test (initiators, airbags…) with IND pyrotechnical ohmmeters / megohmmeters. The contact switches are usually monitored by shared automation (0 24 V) and earth bounding control (contact or transistor). Automation inputs are protected against any change of polarity.
| Range | 0 to 15 Ω |
| Resolution | 0.01 Ω |
| Accuracy | ± 0.1% |
| Measurement type | 4 wires |
| Measuring current | 10 mA |
| Number of channels | 1 or 2 |
| Range | 0 MΩ to 100 MΩ |
| Resolution | 0.1 MΩ |
| Accuracy | ± 1% from 0 to 50 MΩ ± 2% from 50 to 100 MΩ |
| Measurement type | 2 wires |
| Measuring current | 10 mA (Further current on request) |
| Test voltage | 45 V (Further voltage on request) |
| Cycle time | < 2 s |
| Parameter setup | - By keyboard with locking of parameters by key - By serial link |
| Line offset correction | By measurement of line value with validation |
| Triggers | - 24 V at 5 mA – Programmable on opening or closing - Dry contacts in option |
| Output signals | Dry contacts – NO or NC, programmable for: ohmmeter channel and megohmmeter channel measurement, end of cycle |
| Counters | - Counter: Measurement OK - Counter: Measurement out of tolerance - Counter: Measurement out of range - Counter: Measurement total |
| Size | 1 channel box: 280 x 155 x 290 mm 2-to-4 channel box: 480 x 170 x 300 mm |
| Display | Backlit LCD display, 2 lines with 20 characters each Front panel LED showing: - Flashing green: measurement underway - Fixed green: measurement OK - Fixed red: measurement out of tolerance or out of range |
| Supply | 220 VAC – 50 Hz |
| Communication ports | RS 232 or automation |
IND45 Pyrotechnical ohmmeter / megohmmeter
INT17 Switching box
INT17HT High voltage switching box
AOIP offers a complete range of services: technical assistance and advice, calibration and verification by the SOFIA laboratory, equipment repair, maintenance, assistance and metrological monitoring, equipment rental, training, installation and commissioning of your equipment. More informations
