Specifications

PCA

4.11 Turning OFF the Analyzer & Purging

Turn OFF the analyzer by pressing the I/O button for at least 2 seconds,

or until two beeps are heard. The unit will count down 5 seconds before

shutting down, giving the operator an opportunity to keep the analyzer

turned ON by pressing the RUN/HOLD button.

If the PCA

3 was not purged with fresh air as described in Section 4.9,

then the analyzer may remain ON with its pump running and display the

message “PURGING SENSORS” as the result of combustion gases still

being present inside the analyzer. At this time the operator should ensure

that the probe is removed from the stack, allowing the analyzer to purge

itself with fresh air. The 5-second shutdown sequence will not begin until

the gas levels inside the analyzer drop below predetermined levels:

TIP: Although not recommended, the purging process can

be bypassed by pressing the I/O button a second time.

4.12 Low Battery Alarm

When the batteries are nearly depleted, an empty battery icon appears in

the upper-right corner of the display, and a short beep is sounded every

10 seconds.

After a low battery alarm occurs, the analyzer will continue to operate for

only a few minutes. The amount of operating time that remains depends

on many factors (e.g., pump and keypad backlight being ON or OFF, and

the type and condition of the batteries).

4.13 Data Logging

When the logging function is activated, up to 500 combustion test records

will be automatically stored in memory at a preset interval (1, 5, 10, 15,

30 seconds, 1, 2, 5, 10 minutes) over a predetermined duration (5, 10, 15,

30 minutes, 1, 2, 5, 10, 24, 48 hours).

The maximum duration that data can be collected is determined by

the interval. For example, if the interval is set to 10 seconds, then the

maximum selectable length of time in which data can be collected to ﬁ ll

500 memory locations would be 1 hour (500 x 10 seconds = 5000 seconds

or 83 minutes). If the operator chooses a duration that is longer than

possible for the interval chosen, then the analyzer automatically selects

the highest duration possible for the selected interval.