I have acquired a couple of Fluke A55 Thermal converters, but they came without the paperwork, as usual. I would like to determine first of all if they actually work anywhere near spec. from DC to near 1MHz, they seem to be very linear and predictable, as per spec. If anybody has some examples of the calibration corrections one must apply above 1MHz I would appreciate if you share them with me, so I can get an idea about what sort of magnitude they are. Thanks in advance, Poul-Henning -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 phk@FreeBSD.ORG | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribute to malice what can adequately be explained by incompetence.