20 of 66 Operating Instructions - 3654 Portable H2/N2 Analyzer
Operator Manual
ORBISPHERE
The analyzer will store up to 500 gas concentration and temperature measurement
values, labeled by numbers 0 through 499, along with the current date and time of each
measurement. You have the choice of acquiring this information manually or
automatically, as described below.
Note:
Do not put the instrument into standby while it is in the process of storing data,
otherwise the data values will be lost.
Before storing measurements, you should verify the date and time settings of the
instrument's internal clock, as described in “Clock Settings” on page 51.
2.3.1 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 (see “Automatic Data Acquisition - Setting Sampling
Intervals” on page 31).
Note:
If you have not cleared previously stored values, the storage sequence automatically
overwrites the older values, as they are stored.
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
[---] to indicate 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.