HT2000H_en_n.doc Page 55 of 167
2. Insert the power cable inside the socket (number 2 in Figure 22) This cable is connected to
an external power supply (low voltage) (see paragraph 2.1.4 “Connection panel“). Connect
the external power supply to the mains power.
3. If PC connection is needed (optional for HT2000H/HT2000HT, mandatory for HT2100H):
• in case of an Ethernet connected autosampler: insert the Ethernet cable provided with
the autosampler in the port indicated with the number 4 in Figure 22, then plug it into
any Ethernet port available.
• in case of an RS232 connected autosampler: insert the serial cable provided with the
autosampler in the port indicated with the number 4 in Figure 22, then on the PC side
to any RS232C port available.
3.3.4 Purge line connections
Warning
During headspace operation, the syringe is cleaned after each injection with inert, clean gas
(e.g. N
2
or He). Therefore a gas supply line must be available close to the autosampler. Do
not use flammable purging gases. Do not use hydrogen as a purging gas. Hydrogen
creates a potential explosion hazard due to the venting of gases.
To flush the syringe between injections, a suitable gas source (e.g. Nitrogen) must be connected to
the gas inlet 1/8” located on the rear of the autosampler (number 8 in Figure 22) The inlet gas has
to be regulated by using a pressure regulator (only provided as an optional accessory, see
paragraph 3.6.1 “External pressure regulator installation”) at 1 bar maximum (15psi or 100kPa).
The inlet gas should be at room temperature.
Purge gas must be 99.9995% pure. See the table below for the acceptable purge gas. It is
recommended that high quality traps are used in order to remove hydrocarbons, water and oxygen.
Purge gas requirements
Purity
Notes
Helium 99.9995% Hydrocarbon free
Nitrogen 99.9995%
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