15/06/2022 08:00 CO values plummeted to negative values from 0.370ppm over a few hours. Investigation needed.

21/06/2022 On arrival, very high temperatures inside cabinet (air con reading 45C). All gas analysers showing various internal tempearture alarms. Air Con was found to be on HEAT mode not COOL mode - possible that this was distruned during the Six Month service? or possibly reset by a power blip?

Reset Aircon to Cool mode, at 20C, but decided to leave 24 Hours before attempting to calibrate to allow instruments time to cool and stabilise.

22/06/2022 LSO Service done and recalibrated.

Data during this period may be inaccurate due to the possiblity of high cabinet temperatures.