Teledyne 6020 - Photometric analyzer - Manual (Page 35)

Photometric Analyzer Operation 3
Part I 3-11 Teledyne Analytical Instruments
There are two ways to linearize: AUTO and MANUAL : The auto mode
requires as many calibration gases as there will be correction points along the
curve. The user decides on the number of points, based on the precision re-
quired.
The manual mode only requires entering the values for each correction
point into the microprocessor via the front panel buttons. Again, the number of
points required is determined by the user.
NOTE: If input and output are set to 0.00 for all data points, it
might be that your application is linear.
3.3.7 Digital Filter Setup
The 6020 has the option of decreasing or increasing the amount filtering on
the signal. This feature enhances the basic filtering done by the analog circuits by
setting the amount of digital filtering effected by the microprocessing. To access
the digital filter setup, you must:
1. Enter the System menu
_ - _ - _ - _ - _ -
2. DIG_FILT will flash, ENTER,
::::: 99999
3. The number on the second row will flash and can be set by
using the Up/Down switch
4. Press Escape to return to the System menu.
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