Teledyne 9110AH - Nitrogen oxides analyzer - Manual (Page 38)

TELEDYNE Model 9110AH NO
X
Analyzer Operator Manual, 01620, Rev. F
4-6
The M9110AH can operate in any of 3 different sampling modes - NO only, NO
x
only, and
NO/NO
x
switching mode. For the NO or NO
x
only modes just the single gas being measured is
displayed. For the NO/NO
x
switching mode, the display scrolls between the NO, NO
x
, and NO
2
concentration values every 4 seconds.
4.2.5.1 Keyboard
The second line of the display contains eight fields, each field defines the key immediately
below it. By redefining the keys dynamically it is possible to simplify the instrument electronics
and user interface.
4.2.5.2 Status LED's
At the right of the display there are 3 status LED's. They can be in three states, OFF, ON, and
Blinking. The meanings of the LED's are given in Table 4-2.
Table 4-2: Front Panel Status LED's
LED State Meaning
Green Off
On Monitoring
Blinking NOT monitoring, DAS disabled
Monitoring normally, taking DAS data
Monitoring, DAS in HOLDOFF mode (1)
Yellow Off
On
Blinking AutoCal disabled
AutoCal enabled
Calibrating
Red Off
Blinking No warnings exist
Warnings exist
(1) This occurs during Calibration, DAS holdoff, after power-up and in Diagnostic mode.
4.2.5.3 Power Switch
The power switch has two functions. The rocker switch controls overall power to the
instrument, in addition it includes a circuit breaker. If attempts to power up the M9110AH result
in a circuit breaker trip, the switch automatically returns to the OFF position, and the
instrument will not power up.