Automatic Data Acquisition - Hach ORBISPHERE 3654 User Manual

Operating Instructions

4.3.1 Automatic data acquisition

Note: When the instrument is used to automatically store measurement data, all buttons except the
POWER key are disabled. If enough time elapses to store all 500 values, the instrument will return to
normal measurement mode and the buttons re-enabled.
Before starting automatic measurement storage, first select the sampling rate desired using the
WIN3654 program. Refer to
Note: If you have not cleared previously stored values, the storage sequence automatically overwrites the
older values, as they are stored.
To end automatic storage, put the instrument into standby (by pressing the POWER key) while it
is in normal measurement mode and not while it is in the process of automatically storing data.
Switching ON again without holding down the STO button returns the instrument to
measurement mode.
Note: If you accidentally interrupt the automatic data storage by switching off the instrument while it is in the
process of storing a value, and you then attempt to download the stored values by the WIN3654 program,
you will get a Windows Checksum Error message, and you will not be able to view the measurement data.
If this happens, go back to the instrument and manually log one more value (refer to
acquisition on page
18
Automatic data acquisition - setting sampling intervals on page
1. Put the instrument into standby (by pressing the
POWER key)
2. Then hold down the STO button while switching the
instrument back ON. The LCD displays the message
Sto for about one second
3. Normal gas concentration measurements are
displayed for about two minutes
4. After two minutes the instrument displays the sample
number (starting at 000), then the gas concentration
measurement value followed by
the measurement is being stored.
5. This storage sequence repeats automatically, at the
rate specified by the WIN3654 program Sampling Rate
menu. Values are stored sequentially in sample
numbers 000 through 499.
19). You can then download your original set of values to your PC.
29.
[---] to indicate
Manual data