Integral XT
54
Starting up
YAWE0028 / 24/06/2016
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With this program the following parameters are automatically set:
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The pump level is set to Level 2. The pump level should only be changed when neces-
sary (
þ
•
The heater power is reduced, round about 50 % (
þ
•
The cooling unit is switched off (
þ
7.15.7.1). The outflow temperature may rise above
the setpoint due to the heat input from the pump.
•
Pressure control is not recommended (
þ
7.9.4). Take care to the selection of the pump
level with pressure sensitive loads (e.g. glass apparatus). Pay attention to a maximum
permissible operating pressure.
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As with venting, the pump switches off briefly every 45 seconds for improved degassing.
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With units up to 300 °C, after briefly switching the pump off, switching occurs between the
cooling unit and the high temperature cooler under certain operating conditions. So that it can
be ensured that both, the cooling unit and the high temperature cooler are degassed. In addi-
tion, flushing occurs every 20 K.
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To simplify the removal of low-boiling solvents during out gassing, it may be practical to open
the cover of the filling point so that the vapor can escape more easily (use air extraction if re-
quired). In this operating state, check the device continuously; it is essential to keep sources
of ignition away from the filling aperture and to protect the operating personnel from splashes
(e.g. place the cover diagonally on the filling aperture). Appropriate protective equipment and
clothing must be worn. Close the cover again at the end of degassing.
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The end of degassing is reached when the outflow temperature has approached the set tem-
perature (<10 K) and does not increase further. Similarly, the end of the degassing is reached
when the outflow temperature has exceeded the set temperature due to self-heating.
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Terminate the degassing program with the softkey Stop . The device is then in the standby
mode. All the above described parameters are reset to the previous settings.
7.6.3.2 Permanently and automatic degassing
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The device carries out the degassing permanently and automatically further on. When the de-
vice finds gas, first the heating and cooling power is reduced or sometimes completely
switched off. If the pump pressure falls significantly (clear sign of degassing), the pump speed
is limited, and the pump may switch off briefly. The device then starts up again automatically.
−
With devices up to 300 °C and after the pump switches off briefly, switchover occurs between
the cooling unit and the high temperature cooler in certain operating conditions. This ensures
that both the cooling unit and the high temperature cooler are degassed.
7.6.4
Topping up
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Topping up during operation is possible. Volume per level indication step (
þ
Summary of Contents for Integral XT 150
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