Teledyne BDS-3000 - Oxygen analyzer - Manual (Page 62)

Operation BDS 3000
Teledyne Analytical Instruments 48
Reading on 0 to 1 VDC 4-20 mA DC
Display Output Output
0 % of FS 0.0 4.0
100 % of FS 1.0 20.0
If the value is set to 10% of FS:
Reading on 0 to 1 VDC 4-20 mA DC
Display Output Output
-10 % of FS 0.00 4.0
0 % of FS 0.91 5.45
100 % of FS 1.00 20.0
4.3.13 Zero Baseline Temperature Compensation
The BDS Sensor is temperature compensated when not on zero gas.
The “Span” temperature coefficient from sensor to sensor is not very
different. The software will do this temperature compensation without
the need to enter a coefficient. The BDS Sensor baseline exhibits
temperature dependency too and it is different from sensor to sensor. A
temperature coefficient must be entered into the analyzer in order to
compensate for diurnal temperature drifts. The coefficient ranges from
0.50 to 1.75 ppb/°C.
To access this function, press the SYSTEM key to enter it’s menu. Select
the More function to move on to the second screen of the system menu.
Select More one more time to go on to the third screen of the system menu.
GasBKgnd TempComp
Trbsht Temp: 24.3 C
Select TempComp and press ENTER to get to the temperature
coeficient setup menu:
Set BDS sensor temp