LumaSense Technologies INNOVA 1309 - Manual (Page 26)

Chapter 3
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BE1285-15 1309 Multipoint Sampler LumaSense Technologies A/S
Page 26 of 42
tion 4.2 . The default terminator character used is the control character
“<LF>”. The terminator character can be changed, as described in sec-
tion 3.2.1 .
3.3 Using the Sampler System
Using the 1309’s sampler system, see Fig. 1.1 , to deliver a sample to
the Gas Monitor is a 3-stage process:
1. The required sample valve is opened; all other sample valves are
closed automatically.
2. The sample valve is connected to the external pump via the
1309’s internal 3-way valve, allowing the waste air to be ex-
hausted from the sample channel (via the Waste Air Outlet,
section 2.4.4 ) and drawing the new sample.
3. When the new sample has been drawn to the 1309, the internal
3-way valve is set to direct the sample to the Gas Monitor. The
Gas Monitor’s pump draws the sample for analysis.
While the Gas Monitor is analysing this sample, the next sample can
then be drawn ready for the next analysis.
Three interface jobs control the sampling process.
Examples:
OPEN_SAMP_VALVE 1<LF>
CONNECT_SAMP_VALVE
TO_SAMPLING_PUMP<LF>
CONNECT_SAMP_VALVE
TO_MONITOR<LF>
Opens sample valve 1, closes all
other sample valves. If no sam-
ple valve is specified, all sample
valves are closed.
Connects the sample valve to
the external pump, and exhausts
the waste air from the sample
channel.
Directs the new sample to the
Gas Monitor for analysis.