Oil in Water Analyzer | Operation 3 | |
|
|
|
|
|
|
|
|
|
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.
Themanualmodeonlyrequiresenteringthevaluesforeachcorrection 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 6600 has the option of decreasing or increasing the amount filtering on the signal. This featureenhancesthebasicfilteringdonebytheanalogcircuitsby settingtheamountofdigitalfilteringeffectedbythemicroprocessing. Toaccess thedigitalfiltersetup,youmust:
1.EntertheSystemmenu
DIG_FILT | |
PWD LOGOUT | MORE |
2.DIG_FILTwillflash, ENTER,
Weight of digital
Filter: 9
3.The number on the second row will flash and can be set by usingtheUp/Downswitch
4.Press Escape to return to the System menu.
Thesettingsgofromzero,nodigitalfiltering,to10,maximumdigitalfilter- 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. Thisresponsetimedoesnotincludethecontributionsofthebenchsampling system and the preamplifier near the detector.
Setting | 90% Response time |
|
| (seconds) |
|
0 | 4.5 |
|
|
|
|
| Teledyne Analytical Instruments | Part I |
