Resource Conservation - Agilent Technologies 8355 Sulfur User Manual

Resource Conservation

SCD and NCD User Manual
To conserve resources during periods of inactivity, for example,
overnight or over a weekend, use the 7890B GC's resource
conservation features to load a sleep method. (See the GC
Operation Manual for details on using sleep and wake
methods.)
A sleep method for an SCD or NCD should do the following:
• Turn off all hydrogen flows
• Maintain base temperature of 125 °C to prevent
condensation
• Maintain burner temperature of at least 200 °C to prevent
condensation
• Set an oven temperature of 30°C to minimize column bleed
In addition, a sleep method can also:
• Turn on gas saver mode to reduce column flow
• Turn off the ozone generator and ozone supply gas flow
• Turn off the chiller (NCD only)
• Turn off the vacuum pump if carrier gas and the oven are
turned off. (If the carrier gas flow is on, do not turn off the
vacuum pump. With the vacuum pump off, any carrier gas
flow will eventually cause a flow shutdown.)
It is good practice to leave on the oxidizer flow if the vacuum
pump is on.
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Operation
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