4Sample Gas Handling
Heated Zones
48 Agilent 990 Micro GC User Manual
Heated Zones
The heated zones in the 990 Micro GC can be categorized into unit level heated zone and channel
related heated zone. Unit level heat zone is for sample inlets heating, and to keep the sample line
heated without cold spots between the column module and sample inlet. The heated zone
prevents the sample from condensing in the sample lines when analyzing condensible samples.
Channel related heated zone includes injector, column, and channel sample line. There is no
unheated injector for the 990 Micro GC. The injector heater can be disabled by the user if
necessary and made to work in unheated mode.
Table 8 Summary of 990 Micro GC heated zones
Heated zone
Temperature
set point
range (°C)
Set point
resolution
(°C)
Temperature
stability
Actual
working
temperature
range (°C)
Maximum
power/W
Injector 30-110 1 ±1 °C Ambient
temperature + 15
6-7 W
Column 30-180
*
* Maximum temperature depends on the column type.
1 ±0.2 °C Ambient
temperature + 15
8-9 W
Sample line
†
† Note: The sample line temperature is not settable by the user. It is determined by the set point of the injector temperature.
30-110 1 N/A Ambient
temperature + 15
3 W
Sample inlet 30-110 1 ±2 °C Ambient
temperature + 15
10 W
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