tritium controller

---

The Tritium Controller Model 7000 can be configured for a variety of tritium monitoring requirements, including inputs from one or two ion chambers of different sizes and sensitivities, multiple alarm configurations, and multiple range configurations.

• Large flat panel touch screen
• Controls up to two detectors
• Dual Alarm per channel, local and remote
• One touch auto zeroing
• 4-20 mA, 0-10V or RS232 output
• Smooth auto ranging across 9 decades

The Tritium Controller carries out the signal processing for multi-range tritium detector heads (ionization chamber with preamplifier) and is operated by a touch screen mounted on the front panel.

The controller can seamlessly auto range two detectors across 9 decades. Each channel has two user settable alarms. Each alarm has a local visual and audible annunciation as well as a 30 VDC/AC 1A relay for a remote alarm or process actuation, such as valves.

The multi-range function gives the maximum sensitivity as well as a very large dynamic measurement range from 1 µCi/m³ to 1 Ci/m³ allowing it to track total tritium inventory within the loop being measured.

Using either a Voltage or Current output option, digital range indication or RS-232 output integration into a data handling system is easy.  The measured signal is also output in analog form as either 0-10V or 4-20mA. The controller may be connected to a computer through the digital RS232 for remote display.

To help compensate for any background drift in the detectors, the controller has a simple one touch auto-zeroing function. This will zero the entire system across all the measurement ranges.

The controller comes in a standard 3U (4.5”) 19” rack mountable enclosure.

The detection heads can be installed remotely up to 100m from the controller. The detector heads can be either a 1000cc or 10cc detection volume. The 1000cc volume gives the maximum amount of sensitivity to 1 µCi/m³ while the 10cc volume which has a “virtual wall” comprising two nesting cages, gives the highest range of 10,000 kCi/m³ with minimal tritium contamination due to the small metal surface area. Both detector heads have a small in-line footprint with VCR 8/VCR 4 connections, ideal for installing directly into the piping system. They are both pressure vessels that can handle up to 150 psig, can be heated to 350°C without damage, and are 1x10-9 helium leak tight to conform to current tritium handling standards. The detector heads are of stainless steel construction with a ceramic insulator and an electro-polished interior to minimize tritium surface contamination. In the event of contamination the detectors are easily flushed with air to decontaminate them.

For gamma compensation a second detector head maybe installed alongside the first head that is measuring the process loop. The compensation detector head, which has no gas flowing through it, will measure the signal from gamma sources and can be subtracted from the detector head that is measuring the gas in the process loop.

The external electronics of a detector head is inside an enclosure that can be made leak tight and can be connected to a purge gas. This will protect the detector heads in an explosive atmosphere so they may be placed in a hydrogen environment. Purging the electronics to provide cooling is also suggested if the detector head may be operated at temperatures exceeding 50°C.