Teledyne 4020 - Hydrocarbon analyzer - Manual (Page 73)

Total Hydrocarbon Analyzer Operation
Teledyne Analytical Instruments 57
<Enter> Press again to move to the dgtl field.
<▲▼> Use the <▲▼> keys to toggle between the Auto, Manual
and Digital modes
<Enter> Press when Dgtl is displayed on screen.
This sets the instrument in the Digital mode.
<Escape> Use Escape to move back to the Analyze Mode. Note that
the analyzer will now switch analysis ranges according to
the inputs from the remote zero and span ports.
Note: When the instrument is operating in this mode, the remote
zero and span inputs will not trigger a calibration event.
4.6.14 Digital Filter Setup
The Model 4020 analyzer has the option of decreasing or increasing
the amount of filtering on the detector signal. This feature enhances the
basic filtering done by the analog circuits by setting the amount of
digital filtering applied by the microprocessor. The digital filter setup
function is accessed from the MAIN MENU. To set the amount of
digital filtering:
<▲▼> From the MAIN MENU, scroll to the FILTER function
using the UP/DOWN keys.
<Enter> Press to activate the FILTER function.
Press again to move to the Filter index field.
<▲▼> Use the UP/DOWN keys to increment or decrement the
amount of filtering to be applied by the microprocessor.
This index can be adjusted from 0, minimum digital
filtering, to 7, maximum digital filtering. The default