D01 controller experienced a separation event when failing to note conflicting traffic; the reporter...

Narrative:

A B190 checked in climbing to 10;000. After traffic crossed above; I climbed the B190 to 170. He climbed off the right side of a descending B737 arriving from the northwest of denver. That aircraft was a limited data block. The B737 responded to a TCAS alert and climbed. Recommendation: fix the acd radar scopes so our original preferential settings do not change from day to day. We would not be spending time trying to readjust all of our settings. It is just as important to combine positions when there is no traffic or projected traffic as it is to de-combine positions when the traffic warrants; it breeds complacency. Lack of sleep between shifts had a significant impact on the situation developing. The feeling of being on 'auto-pilot' the entire morning shift after the 'quick turn' is quite common for myself as well as many others. However; I understand that at the end of the day it is solely my responsibility to ensure separation; which I failed to do in this situation.

Original NASA ASRS Text

Title: D01 Controller experienced a separation event when failing to note conflicting traffic; the reporter listing schedule restraints and preferential setting anomalies as contributing factors.

Narrative: A B190 checked in climbing to 10;000. After traffic crossed above; I climbed the B190 to 170. He climbed off the right side of a descending B737 arriving from the northwest of Denver. That aircraft was a limited data block. The B737 responded to a TCAS alert and climbed. Recommendation: fix the ACD RADAR scopes so our original preferential settings do not change from day to day. We would not be spending time trying to readjust all of our settings. It is just as important to combine positions when there is no traffic or projected traffic as it is to de-combine positions when the traffic warrants; it breeds complacency. Lack of sleep between shifts had a significant impact on the situation developing. The feeling of being on 'auto-pilot' the entire morning shift after the 'quick turn' is quite common for myself as well as many others. However; I understand that at the end of the day it is solely my responsibility to ensure separation; which I failed to do in this situation.

Data retrieved from NASA's ASRS site as of April 2012 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.

Attributes
ACN	922507
Time
Date	201012
Local Time Of Day	0601-1200
Place
Locale Reference	DEN.Airport
State Reference	CO
Aircraft 1
Make Model Name	Beech 1900
Operating Under FAR Part	Part 135
Flight Phase	Climb
Route In Use	Vectors
Flight Plan	IFR
Person 1
Function	Departure
Qualification	Air Traffic Control Fully Certified
Events
Anomaly	ATC Issue All Types Conflict Airborne Conflict

D01 controller experienced a separation event when failing to note conflicting traffic; the reporter listing schedule restraints and preferential setting anomalies as contributing factors.