PerkinElmer CLARUS 590 GC, User Manual

Page: 254 / 284

254 . Clarus 590 GC User’s Guide
5. Single Point is the default setting. When the Single Point Calibration radio button is selected, the
Offset field is active and the GC Tune drop down field is inactive. (GC Tune is only available if it is
downloaded. A successful tune must be performed in order for GC tune to be enabled. Only
those channels for which a valid tune exists will be available on the drop down list. The selection
will be made from the external GC Tune software, but the user may override this.)
The actual temperature under the single point radio button is the time-averaged actual oven
temperature.
6. Allow the oven temperature to equilibrate for at least 30 minutes by setting the time in the
Equilibrate
field. Press
OK
. The displayed temperature will approach 100.00
°
C (or the oven
temperature you entered in step 4), and the thermometer readout will approach a value close to
100.00
°
C.
Enter the Required Offset Value
1. After the temperature has stabilized, subtract the thermometer reading from the actual oven
temperature shown on the previous screen.
2. Using the plus and minus keys enter a value into the above screen, then press OK. For example,
if the the rm om e te r re a ds 101.55 C, a nd the ove n te m pe ra ture re a ds 100.10 C, type a va lue of
-
1.45 C.
Remove the Thermometer Probe
After temperature calibration is satisfactory:
1. Open the oven door and allow the oven to cool until the fan stops.
2. Remove the temperature probe.
3. Fill in any hole left by the probe in the oven insulation.
4. Replace the left-side instrument cover.