Thank you for that info.
By way of additional information, batteries are replaced and charged prior to testing and rates typically come out with maximum +/- 0.2ml/hr deviation from the set rate of 10ml/hr
Oh and as it's a Friday, no sandwiches, full english and a brief liquid therapy session during dinnertime

and before you ask; no, the Baxter's that I have issue with are not the ones tested on a Friday afternoon.