User guide

1207A manual Page 31
Appendix 1 - Main Parameter:
Here are the legends used and what they mean:
O
2
: Oxygen reading in percentage (%).
O2R: Oxygen reference setting. '----' means switched off or set to 0%.
T Flue: Temperature measured by the flue gas probe in Centigrade or Fahrenheit. It
displays ‘- OC -’ if the flue probe is disconnected.
T Nett : Nett temperature calculated by deducting the AMBIENT or INLET
temperature from the measured FLUE temperature. Displays in either
Fahrenheit (°F) or Centigrade (°C) or and will display ‘- OC -’ if the flue
probe is not connected.
T inlet: Temperature measured by the inlet temperature probe in Centigrade or
Fahrenheit. It displays ‘- OC -’ if the flue probe is disconnected.
CO: Carbon Monoxide reading displayed in ppm (parts per million). ‘- - -’ is
displayed if there is a fault with the CO sensor or the instrument has not set
to zero correctly, switch off instrument and try again.
COm: Carbon Monoxide displayed in mg/m
3
.
COn: Carbon Monoxide in ppm normalized to the O2R value.
COĦ: Carbon Monoxide in mg/m
3
normalized to the O2R value.
COa Carbon Monoxide calculation as if there were 0% Oxygen present. This is
only displayed in ppm.
CO
2
: Carbon Dioxide calculation determined by fuel type. This is only displayed
when a combustion test is being carried out. ‘-O>-’ is displayed while in
fresh air.
EFF : Combustion efficiency calculation displayed in percentage either as Gross
(G) or Nett (N) or Condensing Nett (C) - Use MENU to change. The
calculation is determined by fuel type and uses the calculation in British
Standard BS845. The efficiency is displayed during a combustion test, ‘-
O>-’ is displayed while in fresh air.
X - AIR : Excess air calculated from the measured oxygen and type of fuel used.
Displays reading during a combustion test. ‘-O>-’ is displayed while in
fresh air.
Loss : Losses calculated from Oxygen and type of fuel. Displays reading during a
combustion test. ‘-O>-’ is displayed while in fresh air.