After Use And Storage - Hach ORBISPHERE 3658 Manuel D'utilisation Simplifié

4.5 Monitoring measurements in real-time
You may wish to analyze a particular sampling point via the Hach 3658 program's Monitoring menu.
To use this Monitoring chart, the instrument must be connected to your PC. Choose Monitoring from
the Hach 3658 menu to bring up a chart display.
The Monitoring chart shows the gas concentration (in blue), temperature (in red), and pressure (in
green) as the sample is being measured by the 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.
Timebase
30 Seconds/Division
1 Minute/Division
10 Minutes/Division
30 Minutes/Division
1 Hour/Division
2.5 Hours/Division
*This chart's updating rate is independent from the acquisition rate. Refer to
acquisition - Setting sampling intervals
Click on the Continuous box, in the lower right corner, to enable or disable continuous charting.
When this box is checked, the chart scrolls continuously after reaching the 10 division, and the oldest
samples are lost off the left of the chart. When Continuous is not checked, the chart stops displaying
new results after reaching the 10 division, and all subsequent measurements are lost.
Click the up/down pointers for each measurement variable (GAS, TEMPERATURE and
PRESSURE) at the right of the chart to change the scaling of that value on the chart. The display of
each measurement variable may be turned on or off by choosing the appropriate On or Off switch at
the right of the chart.
If your measurements do not chart properly, try using a higher or lower value scale or time base than
the one displayed. Adjust these scale factors before starting the monitoring operation. A running
display of latest sample Gas, Temperature and Pressure is also shown in the bottom-right corner of
the chart.
Use the buttons at the bottom of the chart to control real-time monitoring. Choose Go to clear the
chart and start real-time monitoring display, Stop to stop real-time monitoring and Copy to copy the
data from the chart as text information to the Windows Clipboard. This information can be pasted
from the clipboard into any Windows application, such as a spreadsheet or word processor. Finally,
choose Close to close the Monitoring window.

4.6 After use and storage

You can power off the instrument without losing setup or calibration parameters.
If measuring in a liquid sample, run clean warm water through the flow chamber after each series of
measurements to prevent passages from clogging, and to keep the membrane clean.
The sensor must be continuously purged to prevent any damage to the thermal conductivity sensing
element. The instrument handles this automatically, even if switched off during short periods (for
example overnight), provided it has a power supply (fully charged batteries or an external power
supply).
14 English
Updating rate*
5 Seconds/Sample
5 Seconds/Sample
5 Seconds/Sample
9 Seconds/Sample
18 Seconds/Sample
45 Seconds/Sample
on page 16.
Maximum samples
(10 divisions)
60
120
1,200
2,000
2,000
2,000
Automatic data