Metrohm 875 KF Gas Analyzer - Manual (Page 27)

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4 Operation
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Partial step Condition Opened valves Stop condition
Draining of the sam-
ple that flowed into
the area upstream of
the regulator Method variable "first
sample measure-
ment?" is set to "yes" Waste gas valve 60 seconds expired
Rinsing out the waste
gas line with nitrogen Method variable "first
sample measure-
ment?" is set to "yes" Nitrogen valve
Waste gas valve
45 seconds expired
Prerinsing with nitro-
gen None Nitrogen valve
Measurement valve
Status message from
the coulometer "Con-
ditioning OK", but at
least 60 seconds
Pressure release nitro-
gen None Measurement valve 20 seconds expired
Sample introduction None Sample input valve
Measurement valve
Value entered for
minimum sample
amount (mg) in the
method variable is
achieved
Pressure release sam-
ple None Measurement valve Gas flow falls below
30 mL/min for more
than 6 seconds
Postrinsing with nitro-
gen None Nitrogen valve
Measurement valve
Stop criteria of the
coulometric KF titra-
tion are met (extrac-
tion time and relative
drift)
Relieving the sample
infeed Method variable "dis-
connect gas container
after measurement?"
is set to "yes" Sample valve
Stopcock 1