Oven Ramp Rates; Setting The Oven Parameters For Constant Temperature - Agilent Technologies 7820A Advanced User's Manual

Oven ramp rates

Setting the oven parameters for constant temperature

Advanced User Guide
Final temperature Temperature of the oven at the end of a
heating or cooling rate.
Final time Time in minutes that the oven will be held at the
final temperature of a temperature-programmed rate.
Total length of a run is determined by its oven temperature
program. The maximum allowable time for a run is
999.99 minutes. If the program is still running at that time, the
run terminates.
See also "Post Run Programming."
The highest rate that you can achieve depends on many factors,
including the room temperature, temperatures of the inlets and
detectors, the amount of material inside the oven (columns,
valves, etc.), and whether or not this is the first run of the day.
Table 8 lists typical oven ramp rates.
Table 8

Oven ramp rates

Temperature range (°C)
50 to 70
70 to 115
115 to 175
175 to 300
300 to 425
An isothermal run is one in which the oven is maintained at a
constant temperature. For an isothermal run, set Rate 1 to zero.
Press [Oven] to open the oven parameter list.
1
Enter the oven temperature for the isothermal run.
2
Enter the number of minutes (Initial time) that you want the
3
oven to stay at this temperature. This time is the duration of
the run.
If Rate 1 is not already 0, enter zero for an isothermal run.
4
100 V oven
ramp rate (°C/minute)
30
30
30
30
20
4
Columns and Oven
200/220/230/240 V
oven
ramp rate (°C/minute)
75
45
40
30
20
51