Temperature Logging in an Explosion Risk Area.

Temperature Logging in an Explosion Risk Area.

We received an interesting enquiry from Omni Instruments a specialist supplier of data logging solutions, they needed a data logger to monitor temperature measurements at up to 30 test points on an oil platform. Sounds simple but petrochemical plants of any type are potentially hazardous environment and thus test equipment is strictly controlled and assessed for suitability, many instrumentation products have to be supplied as either intrinsically safe or within explosion proof enclosures.

In this application Omni Instruments needed a unit that could be sealed within an explosion proof enclosure and then be accessible via a USB interface, from here with the aid of a special intrinsically safe USB drive they could transfer the data to a safe area for download. The USB interface on the Hioki LR8400-20 multi-channel logger solved this problem for them.

The next problem was how to turn the Hioki LR8400-20 multi-channel logger on and off while sealed within the explosion prof enclosure. This was achieved by using a standard stop/start feature on the unit that enables it to automatically recommence recording when power is re-connected after a power failure. The clever bit here is that each time the power is switched off and then back on the unit automatically recommences logging and a new recorded data file is started with a new and consecutive filename. This enabled Omni to simply control the recording sessions by controlling the power to the unit. As soon as the power is switched back on, the recording will recommence. Omni instruments also introduced a timer into the power control circuit to allow timed logging intervals to be set.

GMCI solved a few technical problems for the Omni Instrument engineers but we also really appreciate all their effort and expertise in utilizing the Hioki LR8400-20 in such an interesting application. We now look forward to supporting Omni Instruments on future projects.

Category: Data Loggers