Instruction 24-9435
19
Fyrite Tech
4.10 Stack & EFF Screen
The STACK reading is the
fl ue gas temperature in either °C or °F as mea-
sured at the tip of the probe.
The EFF (Effi ciency) reading is a calculation (non Seigert) of what percent-
age of energy present in the fuel was converted into usable heat.
Front Panel Button Functions:
▲
– Displays next screen (refer to Section 4.13)
▼
– Displays previous screen (refer to Section 4.13)
ENTER
– Hold for 2 seconds to display Fuel Screen
HOLD
– Freezes display (press
ENTER
to unfreeze)
LIGHT
– Toggles backlight ON/OFF
I/O
– Turns analyzer OFF (with a 5 second delay)
4.11 Sensor Error Screen
An O
2
sensor error is displayed if the analyzer determines during the
warm-up cycle that the oxygen sensor’s output is too low for it to be usable.
However, in the extreme condition when the O
2
sensor has
no output
, a sen-
sor error will not occur. Instead, the O
2
reading will be 0.0 as displayed in
the CO
2
& O
2
Screen (refer to Section 4.5).
When the CO channel (Model 60 only) is set up for Auto Zero (refer to Sec-
tion 3.5.3), a CO sensor error will occur if the detected CO level is above
50 ppm during the warm-up cycle. Note that if the CO chan nel is set up for
manual calibration, the analyzer does not auto-zero the CO sensor during
warm-up, and thus does not generate a CO sensor error when the analyzer
is turned ON in an atmosphere containing a high back ground level of CO.
Do the following before replacing a suspected spent or defective sensor:
1. Turn OFF the analyzer and turn it back ON in an area of fresh air
(con tain ing 20.9% O
2
and no CO).
