CP-3800 GC Operator’s Manual
129
The second adjustments page is only accessible if detector EFC is installed.
Note that a TCD can be used with two different types of EFC. The following
example is for type 14, which provides make-up flow to one channel of the
TCD and reference flow to the other channel.
ACTIVE
METHOD
EDIT
METHOD
CTRL
RUN
TIME
END
TIME
Method 1
Method 1
0.00
20.00
Make-up Flow (ml/min): 25 Ref. Flow (ml/min): 30
FRONT TCD ADJUSTMENTS, Page 2 of 2
Make-up Flow (ml/min):
25
Reference Flow (ml/min):
30
The other EFC choice for TCD is 16. Type 16 provides two channels of
Hydrogen, one for makeup and one for Reference gas.
Operation
To operate, the TCD requires only carrier gas. Helium or hydrogen are
recommended as carrier gases. You can use nitrogen as a carrier gas, but
you may lose some sensitivity and see an increase in the detector noise.
WARNING:
FIRE HAZARD
If hydrogen is used as a carrier gas, vent the hydrogen from
the TCD to a safe place. Hydrogen is very flammable.
Before
Operating
the TCD
Do not operate the TCD until you have connected carrier gas to both inlets of
the TCD. The TCD accommodates two columns (a column for the reference
cell and a column for the detector cell) or a column and a reference line. The
columns can be packed or capillary columns and you can combine a
capillary column with a packed column. To avoid contaminating the detector,
condition all packed columns before you connect them to the TCD.
For the following discussion, assume that the analytical column is attached to
the right side of the TCD and the reference column or reference gas supply
to the left side of the TCD. However, you can configure the GC with the
analytical column connected to the left side of the TCD, simply reverse the
TCD polarity.
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com
