UEi Test Instruments C75OILKIT - Manual (Page 4)

Selecting Fuel
To set the fuel simply rotate the selector to “FUEL” then press the “UP”
or “DOWN” arrows to scroll through the choices. When the correct fuel
is displayed on the bottom line press “ENTER” to choose this fuel.
Symbol Legend
Setting Inlet Temperature
During the automatic calibration sequence the burner INLET (Ti)
temperature used in the NET temperature calculation is stored in the
analyzer. There are two methods of storing the INLET temperature.
A. Without the flue probe connected temperature inside the analyzer
is used (ambient temperature).
B. If the flue probe is connected the temperature of the probe tip is
used. This can be useful when the temperature of the air entering
the burner is different than the ambient temperature of the room.
NOTE: On ducted inlets, insert the probe tip into the inlet air during the
zero countdown. The analyzer will then store this temperature as the
ambient (inlet) for use in efficiency calculations. Do not sample flue gas
during the zero countdown.
WARNING!
If the INLET temperature is set incorrectly, then errors will be made in
the calculation of net temperature and efficiently.
Sampling the Flue Gas
Once the automatic calibration procedure has been completed and the
specific fuel has been selected (see menu options) the probe can be
inserted into the desired sampling point.
It is recommended that the sampling point be located at least two flue
diameters downstream of any bend, as close to the source as possible,
and that the probe tip is in the center of the flue. With balanced flues
and other domestic units the probe should be positioned far enough
into the flue so that no air can “back flush” into the probe.
Symbol Description Notes
Efficiency (gross) Calculated percentage efficiency based on
net temperature, O2 value and fuel selected.
Battery Level Battery level indication with percentage
remaining.
Excess Air Theoretical amount of air in excess of level
needed to completely burn fuel.
Losses Losses calculated from Oxygen and type of
fuels. Displays reading during a combustion
test. “- - - -” is displayed while in fresh air.
∆T Delta Temperature Net Te m p e rature of Flue and Ambient (or inlet).
TF Flue Temperature Measure of Flue Temperature.
Analyzer Connections
NOTE: Take care when inserting the temperature probes as the pins are
polarized. Insert with the smaller pin (+) to the right. A view of the
sockets is shown below.
Automatic Calibration
During this sequence the analyzer pumps fresh air into the Oxygen and
CO (C75 only) sensors to allow them to be set to 20.9% and zero
respectively. See “Setting Inlet Temperature) for information on options.
Changing the Display
The parameters on the display are selected from the following using the
rotary selector knob. Certain items are available on the AUX display by
selecting through the menu.
Selector Top Line Bottom Line
Fuel Fuel Selected Fuel Indicator
(Scroll selection with the up/down • NAT GAS Natural Gas
arrows and then press the enter key • PROPANE
“HOLD” to choose • BUTANE
• L OIL
Light Oil
• LPG Liquid
Petroleum Gas
• H OIL Heavy Oil
Aux User selectable line 1 User selectable line 2
Status Fuel selected Battery level
CO2 / X-Air CO2 in percentage Excess Air % (represented by
Greek Lambda )
Eff (Efficiency ) Flue Te m p e rature (TF) E f f i c i e n cy % (represented by
Greek eta )
T Flue TF (Flue temp) Net Te m p e rature (∆T )
T Amb (Ambient) Ambient Temp (or set inlet tempera t u r e Net Te m p e rature (∆T )
See page 7)
O 2 / CO Measured O2% Measured CO ppm
Air Fr e e Calculated value for
CO Air Free (see page 17)
Mem (Memory ) Used to view or delete stored readings
D a t e / T i m e D a t e T i m e
S e t u p Used to setup instrument Adjustment position for Time,
Date, Te m p e rature scale,
Screen Contrast, Language,
Header, Aux selector display,
or entering Service mode.
C75-MAN P. 3
Flue (Tf) temperature
socket Mains adapter socket Flue gas inlet
Water trap drain plug