Antec Scientific DECADE II 171, User Manual, Page: 49 / 87

CHAPTER 6 Events and time files 49
C H A P T E R 6
Events and time files
Introduction
Running an Events table (time file) enables a time-based, automated and full
parametric control of electrochemical detection (ECD). This is particularly
useful when during a run or between runs settings have to be changed such
as the sensitivity, auto zero or control of external equipment (i.e. trigger to
start integration software etc.). A time file contains a series of data lines
(maximum of 50) in which the settings of the DECADE II can be changed
with 0.01 min (0.6 s) time resolution.
Fig. 29. Programming a time file using the 'PROG' screen.
The time file is made using the ‘PROG’ screen. Programmable parameters
comprise cell potential, range, auto zero, offset, filter, board id, electrically
actuated injector (if present) and the DECADE II output contacts to control
the status of external equipment.
Table IV. A time file used for offset programming at 5.00 min.
time range filt valve auto
zero output offset E cell id
00.00 1 nA 0.5 Hz load not 0000 00% 0.80 V 00001
00.02 1 nA 0.5 Hz load set 0000 00% 0.80 V 00001
05.00 1 nA 0.5 Hz load not 0000 -30% 0.80 V 00001
05.02 1 nA 0.5 Hz load set 0000 -30% 0.80 V 00001
14.96 1 nA 0.5 Hz load not 0000 00% 0.80 V 00001
14.98 1 nA 0.5 Hz load set 0000 00% 0.80 V 00001
15.00 EndCycleTime (end of run)
Step by step example
In this step-by-step guide the example from Table IV will be programmed.
The data acquisition software controls the detector, and the autosampler.
There is no external valve connected to the ‘C’ or ‘B’ on the rear panel of the
detector. For some reason, a user wants to give an
–30% offset after t=5.00
min.
T i m e = 1 1 2 3 3 i d = 0 0 0 0 1 P R O G
8
R a n g e = 5 0 n A E c = + 0 . 8 0 V A z e r o = N O T 4 9
F i l t = . 0 0 2 H z O u t p = 0 1 1 0 O f f s = + 1 0 %
P R E V A D D D E L S C R O L L E N D C Y C L E