Bruker CryoProbe User Manual

Wiring
CryoProbe User Manual BRUKER 57 (107)
•HIGH For T
VT gas
+ 5°C < T
target
< T
limit, high
This is generally the preferred position un-
less the temperature control appears to be
unstable for temperature setpoints close to
the incoming VT gas temperature.
CAUTION: Obey the upper limit for the sample temperature and the
maximum VT heater power as given on the ‘L
IMITATIONS - WARNINGS’ sheet. This
temperature must not be exceeded - not even for a short time.
NOTE: The VT Interface Box splits the VT unit heater energy and disposes part of
it as heat at the box. When the box is in L
OW position but forced to heat the sam-
ple beyond 65°C, a safety circuit will prevent the box from overheating. A
heater
failure
will be reported by the VT unit and in the edte display.
Measurements below T
VT gas
+ 3°C 5.3.2
An optional BCU05 gas cooler is required.
Depending on the target temperature (see “Figure 5.1”) the selector switch on
the VT Interface Box has to be set accordingly to
• L
OW For T
min
< T
target
< T
min
+ 5°C
•HIGH For T
min
+ 5°C < T
target
< T
VT gas
+ 3°C
This is generally the preferred position un-
less the temperature control appears to be
unstable.
CAUTION: Obey the lower limit for the sample temperature as given on
the ‘L
IMITATIONS - WARNINGS’ sheet. This temperature must not be exceeded - not
even for a short time. Never use a liquid nitrogen evaporator to provide cold VT
gas.
CAUTION: Use a special VT adapter or a hose connection of sufficient length
such that, at the point where the hose enters the CryoProbe, there is no freezing
or condensation.
Tuning the regulation loop 5.3.3
Use the self-tune feature of the B-VT units to optimize the sample temperature
regulation loop. Write down the control parameters of the B-VT unit and also the
VT heater power required to achieve the desired temperature. Set the heater limit
accordingly.
NOTE: A B-VT2000 cannot be self-tuned with edte (although no error appears)
but must be set directly at its E
UROTHERM unit. See the B-VT2000 Operating Man-
ual (P/N W1101034) for instructions.
Wiring 5.4
0
See also the CryoProbe RF Electronics Technical Manual for details.
T
limit, high
T
limit, low

Bruker CryoProbe Specifications

General

Brand	Bruker
Model	CryoProbe
Category	Laboratory Equipment
Language	English