CODEL Energy Tech 401 Installation, Operation And Maintenance Manual page 64

EnergyTech 401
Operating and Maintenance Manual
4.8.1.27 Set Detectors
4.8.1.28 Span Adjust
The Span Factor will be adjusted at the factory by CODEL, do not adjust it unless the instrument sensitivity is
suspected, and it is recommended that before adjustments are made, the original value is recorded.
4.8.1.29 Calibrate
Page: 64
Both the D1 and D2 level from the receiver are displayed, saturation counts are
also displayed. – use the arrow key to toggle between the values. To give an
immediate response to any alterations that are required, the gas cells are not
moved during this operation.
Instrument sensitivity can be adjusted if a known concentration of measurement
gas exists between the transmitter and receiver units, and instrument sensitivity is
suspected. If a problem arises with this, then please consult CODEL.
NOTE
The Span Factor may need adjusting if new gas cells or filters have been fitted.
See Span Factor Adjustment.
Re-enter Mode 5 Calibrate menu and proceed to the calibrate option. The basic
calibration of the instrument can be calculated from this routine. It is preferable
to conduct this operation with the plant shut down to ensure a zero gas
concentration within the duct. If this is not possible, however, the instrument can
calibrate to a known value of the gas concentration – the calibration target.
Set the calibration target either to a known value of the gas concentration or to
zero, and set the desired number of cycles over which the calibration factor is
determined (a minimum of 30 is recommended). The calibration should now be
run and the display will show a count down during its execution. When the
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