Teledyne 6000B - Photometric analyzer - Manual (Page 37)

Photometric Analyzer Operation 3
Part I 3-11 Teledyne Analytical Instruments
DIG_FILT SELF-TEST
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2. DIG_FILT will flash, press the ENTER key,
Weight of digital
Filter: 9
3. The number on the second row will flash and can be set by
using the Up or Down arrow keys.
The settings go from zero, no digital filtering, to 10, maximum digital filter-
ing. The default setting is 8 and that should suffice for most applications. In
some applications where speeding the response time with some trade off in noise
is of value, the operator could decrease the number of the digital filter. In
applications where the signal is noisy, the operator could switch to a higher
number; the response time is slowed down though.
90% response time on the different settings to a step input is shown below.
This response time does not include the contributions of the bench sampling
system and the preamplifier near the detector.
Setting 90% Response time
(seconds)
0 4.5
1 4.5
2 5.0
3 5.0
4 5.5
5 7.0
6 9.0
7 14.0
8 25.0
9 46.0
10 90.0
At a setting of “zero”, the response time is purely set by the electronics to
4.5 seconds. The numbers above can and will change depending on application
and they merely serve to illustrate the effect of the digital filter.