Emerson IM-106-5500 Manual Do Utilizador

IM-106-5500, Original Issue

August 2005

CCO 5500

3-16

9. Calibration 

From this option the two detector levels 
may be displayed and a basic calibration 
conducted. During Set Detectors the gas 
cells are not moved; this gives an 
immediate response for setting up the detector levels. The basic 
calibration of the instrument is set by a 'CAL FACTOR' which is 
calculated during a calibration routine. Press the ENTER key while this 
is displayed and the following options are available.
a. Set Detectors 

Both the D1 and D2 levels from the 
receiver are displayed, and saturation 
counts are also displayed. To give an 
immediate response to any alterations 
that are required, the gas cells are not moved during this operation. 

b. Span Adjust 

NOTE
The Span Factor is set at the factory by Rosemount Analytical; Do not adjust 
it unless the instrument sensitivity is suspected. It is recommended that 
before adjustments are made, the original value is recorded.

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, 
please consult Rosemount Analytical. 

The Span Factor may need adjusting if new gas cells or filters have 
been fitted. 

Refer to Span Factor Adjustment. 

c. Calibrate 

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.