Hach 3650 manual Monitoring Measurements In Real-Time

3650 Portable O2 Analyzer - Operating Information 21 of 50

2.5 Monitoring Measurements In Real-Time

You may wish to analyze a particular sampling point via the WinLog97 program's Monitoring menu. To use this Monitoring chart, the analyzer must be connected to your PC.

Choose Monitoring from the WinLog97 menu to bring up a chart display like the one illustrated in Fig 2-6.

Fig 2-6: Real-Time Monitoring

The Monitoring chart shows the gas concentration (in blue), temperature (in red), and pressure (in green) as the sample is being measured by the 3650 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 21.

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 26).

Operator Manual ORBISPHERE