Start-Up - Agilent Technologies 8355 Sulfur User Manual

4
Operation

Start-up

54
How to start the detector depends on whether or not you have
created a method for the detector.
If a valid method exists: After you have used the SCD/NCD (at
least one valid method exists), start the detector by loading the
method. As soon as the method loads, the GC will turn on the
vacuum pump and oxidizer flows, and also turn on all other
parameters except hydrogen flow. The GC will monitor the
temperatures and prevent hydrogen flow until the base
temperature reaches 150 °C and the burner temperature
reaches 200 °C. Once the detector temperatures reach these
minimum limits, the GC turns on the hydrogen flow.
During initial startup, or whenever there are no method
parameters set for the SCD or NCD, start the detector as
follows:
1
Access the method parameters.
At the GC front panel, press [Front Det], [Back Det], or [Aux
•
Det #].
• In the data system, select the detector in the method
editor.
2
Turn on the vacuum pump.
3
Set the oxidizer flow rate and turn on the oxidizer flow.
4
Wait 1–2 minutes for the vacuum pump to purge the system
using the oxidizer flow.
5
Set the base temperature and turn it on.
6
Set the burner temperature and turn it on.
7
For NCD only: Set the chiller temperature and turn it on.
8
Set the hydrogen flow and turn it on.
9
Set the ozone supply gas flow and turn it on.
10
Turn on the ozone supply gas high voltage.
The GC will monitor the temperatures and prevent hydrogen
flow until the base temperature reaches 150 °C and the burner
temperature reaches 200 °C. Once the detector temperatures
reach these minimum limits, the GC turns on the hydrogen flow.
If needed, also turn on the PMT voltage. See
Detector" on page 58.
"Configure the
SCD and NCD User Manual