IM540 is a vacuum gauge controller that reads IE414 and IE514 hot cathode gauges. Pirani and capacitance diaphragm gauges can be connected as well, so one unit handles up to 4 measuring principles from atmosphere to ultra-high vacuum.
| Measuring Channels | 3 |
| Measuring Range (IE414) | 1×10⁻¹¹ … 1×10⁻² mbar |
| Measuring Range (IE514) | 1×10⁻¹² … 1×10⁻⁴ mbar |
| Supply Voltage | 90…264 V (ac), 47…63 Hz |
| Interface | RS232C, Profibus (with IF540P) |
| Operating Temperature | +5…+40 °C |
| Storage Temperature | -20…+60 °C |
| Weight | approx. 3.0 kg |
| Recorder Output | Log 0…10 V (1 V/dec) or linear 0…10 V |
| Switching Thresholds | 2 (floating changeover contacts) |