>
>
>On our AVANCE 500, we have a BVT3200 and a type T sensor for
>temperature control. We do not have a BCU05 or a N2 supply and
>so RT air is feeding our probes. We have been running all
>experiments at 300K whereas our room temperature is at 293K.
>
>Performing an edte self-tune on our probes under these conditions
>leads to a heater current which never strays too far from 0 and,
>what's worse, oscillates and sometimes goes to zero. This can
>wreak havoc on our lock signal and so I'd love to get the heater
>stabilized.
For what it's worth:
we have an AVANCE DRX-500 with a BVT3000, type T sensor and a BCU06. The
BCU06 is connected but not used routinely. RT air at 293 K is supplied at
the "270" flow rate on the temperature monitor and the probe temperature is
apparently stable at 298 K with the default edte settings. Heater power
typically between 0.8% and 1.0%. (We keep the power limiter at 5%).
Could it be that "self tune" requires a bigger temperature difference to
work properly?
Jim Bloxsidge.
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J P Bloxsidge Email: j.bloxsidge@surrey.ac.uk
Chemistry (C4),
University of Surrey Tel: +44-(0)1483-686852
GUILDFORD
Surrey GU2 7XH Fax: +44-(0)1483-686851
UK
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