Oil in Water Analyzer | Operation 3 | |
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3.8.1 The Set Range Screen
TheSetRangescreenallowsreprogrammingofthethreeanalysisranges and the calibration range (background gas, low end of range, high end of range, and % or ppm units). Original programming is usually done at the factory ac- cordingtothecustomer’sapplication.
Note: It is important to distinguish between this System program- ming subfunction and the Range button function, which is an operator control. The Set Range Screen of the System func- tion allows the user to DEFINE the upper and lower limits of a range AND the application of the range. The Range function only allows the user to select or define the limits, or to select the application, but not to define the application.
Normally the Model 6600 is factory set to default to manual range selec-
Intheautorangingmode,themicroprocessorautomaticallyrespondsto concentrationchangesbyswitchingrangesforoptimumreadoutsensitivity.Ifthe upperlimitoftheoperatingrangeisreached,theinstrumentautomaticallyshifts to the next higher range. If the concentration falls to below 85% of full scale of the next lower range, the instrument switches to the lower range. A correspond- ing shift in the DC concentration output, and in the range ID outputs, will be noticed.
The autoranging feature can be overridden so that analog output stays on a fixed range regardless of the contaminant concentration detected. If the concen- tration exceeds the upper limit of the range, the DC output will saturate at 1 V dc (20 mA at the current output).
However, the digital readout and the
To program the ranges, you must first perform the four steps indicated at the beginning of section 3.8 Programming. You will then be in the second System menu screen.
ALGORITHM | APPLICATION |
MODEL | OUTPUT: 4MA |
Use the UP/DOWN switch again to move the blinking to APPLICATION and Enter.
Teledyne Analytical Instruments | Part I |
