Controller / User Interface | 4-55
ACAL Interval (hr) Enter a value (hours) that controls the
interval between Auto-Calibration se-
quences. The interval can be set from 0–999
(default = 0 hours). Enter ‘0’ to turn off the
timer, disabling a timed start of the Auto-
Calibration Zero sequence.
Display
During normal operation, displays the species being measured (top
line) and its real-time status (bottom line).
When an Auto-Setup is in progress, a message indicating the current
stage of the Auto-Setup is displayed on the top line (the concentration
value continues to be displayed on the bottom line).
During normal conditions, the text is Green; when there is a Warning
or Fault alarm present, the text is Red. If an alarm is present, refer to
the “Diagnostics and Troubleshooting” section in Chapter 6 for details
about the alarm and corrective action to take to reset the alarm.
Flow Control
The analyzer gas flow control mode can operate in one of eight “sam-
ple” modes. For normal operations, the analyzer operates in the “auto”
mode (Automatic Analyzer Control). Other Flow Control modes are
set manually.
The Flow Control modes (see Flow Control Legend) vary for differ-
ent analyzers. The analyzer will operate in the corresponding Flow
Control code that is entered in the Flow Control Mode text field. After
entering a code, click Apply (Flow Control area) to save the change
and set the analyzer into the new Flow Control mode. If the Flow
Control mode is in any mode other than ‘0’ (auto), the message “Flow
Control not in Auto” will be displayed in the Operational Message
window on the Status tab.
0 = auto
The analyzer will automatically determine and set the mode of opera-
tion (either sample or shut-in) by monitoring the state of the Fault
alarm relay contacts. Upon analyzer start-up and during Fault alarm
condition, the analyzer will automatically shut down the flow.
1 = shut-in/off
Manually shuts off the flow of sample gas from the sample system.
2 = zero
Manually forces the analyzer to continuously Zero its sample system
with Zero gas.
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