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3654 Portable H2/N2 Analyzer - Operating Instructions 25 of 66
Operator Manual
ORBISPHERE
2.5 Monitoring Measurements In Real-Time
You may wish to analyze a particular sampling point via the WIN3654 program's
Monitoring menu. To use this Monitoring chart, the analyzer must be connected to your
PC.
Choose Monitoring from the WIN3654 menu to bring up a chart display like the one
illustrated in Fig 2-4.
The Monitoring chart shows the gas concentration (in blue), temperature (in red), and
pressure (in green) as the sample is being measured by the 3654 instrument. The chart
is updated directly from instrument measurements, at a rate determined by the time
scale set in the TIMEBASE box at the lower right corner of the chart.
Click the TIMEBASE up/down pointers to change the time scale of the divisions of the
chart. Each division mark along the baseline (1, 2, ...10) can be made to represent from
30 seconds to 2½ hours, providing from 5 minutes to 25 hours of continuously displayed
samples. The chart updating rate is determined by the time scale selected, as shown in
Table 2-1, “Chart Updating Rate,” on page 25.
Fig 2-4:
Real-Time Monitoring
Table 2-1: Chart Updating Rate
Timebase Updating Rate* Maximum Samples (10 divisions)
30 Seconds/Division 5 Seconds/Sample 60
1 Minute/Division 5 Seconds/Sample 120
10 Minutes/Division 5 Seconds/Sample 1,200
30 Minutes/Division 9 Seconds/Sample 2,000
1 Hour/Division 18 Seconds/Sample 2,000
2.5 Hours/Division 45 Seconds/Sample 2,000
*This chart's updating rate is independent from the acquisition rate (see
“Automatic Data Acquisition - Setting Sampling Intervals” on page 31).