I worked on that exact model during a locum at Riyadh Military Hospital in SA,they showed it me working but when they switched it on and were preparing to put a patient on there were no alarms showing behind the black plastic panel and said there never had been,I quickly took the cover off and wiggled a large relay and it lit up like a Christmas tree.
Just proved how intrinsically safe they were as they had been using it for years oblivious :-)
Another great Redy story,I was searched leaving Heathrow en-route to dialyse a patient in Guyana and they were quite concerned about the 12 adsorbent cartridges in my luggage until I pointed out I'd have to be a bit stupid to try and export cocaine or heroin back to South America :-)
We had a patient phone us from holiday on one, he was whispering down the phone and we struggled to hear him. He managed to get the point across that he was on a site public phone and didn't want to shout, as the redy had been on fire in the log cabin he was staying in.....