Instruction Manual
Model NGA2000 NDIR
Set the NDIR Analyzer Module for desired operating range. Zero and span the module, and then supply sample gas to the SAMPLE INLET at the rear of the module. The NDIR Analyzer Module will now automatically and continuously analyze the sample stream.
As a check of instrument performance, the operator should keep a log of zero/span status.
Maximum permissible interval between calibrations depends on the analytical accuracy required. A frequency of once every 24 hours is recommended initially, and that practice should be continued unless experience indicates that some other interval is more appropriate.
Readout accuracy is directly proportional to change in barometric pressure (i.e., a change in cell pressure of 7.6mm of mercury will result in a readout error of about 1% of reading). Therefore, if barometric pressure changes significantly, a recheck of calibration against a span gas is advised. Also, an optional Pressure Compensation Board is available that electronically compensates.
The Analyzer Module will not allow the user to increase the upper limit of a range beyond the "maximum range" software setting. To change the "maximum range" value, select the following from the Main Menu: Technical Configuration Menu, Service Menu, Manufacturing Data, Analyzer Manufacturing Data. Select Maximum Range, and use the arrow keys to scroll the indicated value. The same applies for "minimum range" setting.
Startup and Operation | Rosemount Analytical Inc. A Division of Emerson Process Management |