Shimadzu GC-2014 Instruction Manual

13 Detector
13.2 Thermal Conductivity Detector (TCD)
169
GC-2014
13.2.3 TCD Zero Point Adjustment
Press [Zero Adj] (PF menu) on the [MONIT] key main screen to automatically start zero point
adjustment. When the TCD is used, the balance between sample and reference sides
becomes off after a column is replaced so the baseline may go off-scale. In this case, carry
out a zero-coarse-adjustment following the procedures described below.
TCD zero-coarse-adjustment is usually unnecessary when starting the unit after stopping it to leave the
lab on the previous day. It takes a while for the TCD baseline to stabilize. Even if the baseline is off-
scale when starting the unit, it goes close to zero when it stabilizes in many cases. Wait until the
baseline stabilizes.
1. Press [Zero Free] (PF menu) on the [MONIT] key main screen.
2. Turn the TCD zero-coarse-adjustment control shown on Fig. 13.2.4 to make the baseline close to
zero. It takes a while for the baseline to move after the control is turned. Turn the control slowly.
3. Press [Zero Adj] (PF menu) on the [MONIT] key main screen.
Fig. 13.2.4
NOTE
TCD zero -coarse
-adjustment control

Shimadzu GC-2014 Specifications

General

Type	Gas Chromatograph
Display	LCD
Maximum Heating Rate	120°C/min
Data Acquisition	Digital
Maximum Number of Detectors	4
Weight	Approx. 45 kg
Carrier Gas	Helium, Nitrogen, Hydrogen
Detector Options	FID, TCD, ECD, FPD
Injection Port	Split/Splitless, On-column
Gas Control	Electronic Flow Control (EFC)
Temperature Programming Rate	0.1 to 120 °C/min
Power Requirements	230 V AC, 50/60 Hz
Detector Temperature Range	Up to 400°C (depending on detector type)