36 PL-GPC 220 User Manual
4 Using the Module
The Graphical User Interface
The PL-GPC 220 oven can be controlled at two temperatures:
• one programmed for the Idle mode and
• one for the Run mode.
Typically, these temperatures would be set at the same temperature, but if it
was necessary to automatically change the temperature of the oven following a
sample sequence, or if it was desirable to default the system to safer lower
temperature should a problem occur, the Idle Temperature can be programmed
at a different temperature from the Run Temperature.
Temperatures can be set by clicking and dragging the thermometers, typing
the value in the Edit box or using the up and down arrows adjacent to the Edit
box.
Heat Rate is the rate at which the oven will heat to the set temperature. To
prevent excessive over-shoot of the set temperature and prolonged
stabilization time, it is advisable to use a heat rate of ≤0.5 °C for operating
temperatures <100 °C. The minimum programmable heat rate is 0.4 °C/min
and the maximum is 2 °C/min.
The Vapour Sensor Threshold determines the relative sensitivity of the sensor to
organic solvent vapour concentration. For oven temperatures below 80 °C, a
value of 5.0 is recommended, increasing to 6.0 for temperatures between
80 °C and 120 °C, and 7.0 for operation above 120 °C or if using chlorinated
solvents at any temperature.
Disable Heaters – if this box is checked, the oven heaters will be disabled and
the instrument can be run with the oven temperature at ambient temperature.
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