Teledyne 6400A Instruction Manual page 53

Sulfur dioxide analyzer
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TAI Model 6400A SO
5.3.4.3 Dual Ranges
Dual Ranges allows you to select different ranges for REC and DAS analog output channels. To set
up Dual Ranges press SETUP-RNGE-MODE-DUAL, then press ENTR. To set the values press
SETUP-RNGE-SET. The 6400A will prompt you for the range of RANGE1 (REC) and RANGE2
(DAS) outputs (refer to Figure 2-2 for corresponding analog output terminals). Key in the desired
range for each output channel, then press ENTR after each value.
If Dual Range is selected and their desired ranges are entered accordingly, the 6400A should be
calibrated for each of the range selected. See Section 7.9 for Calibration Procedure.
If user has selected either Auto Range or Dual Range, then pressing CAL button will cause to
display #1 and #2. #1 means RANGE1 calibration and #2 means RANGE2 calibration. Select
desired range number and press ENTR to continue calibration procedure of selected range. Under
each range calibration procedure, the 6400A will display separate test measurement functions
accordingly to show the Slope, Offset, Range, etc for corresponding range. However once exit this
calibration menu and return to the main menu (see Figure 2-4), then the test measurement
parameters for RANGE1 are used throughout the 6400A.
When initiating calibration remotely via the contact closures, the RS-232, or automatically via
the timer, the 6400A will calibrate RANGE #1.
5.3.4.4 Dilution Ratio
The dilution feature allows the 6400A to be used with a stack dilution probe. With the Dilution
feature you can select the range and display the concentration at the value and units of the un-diluted
gas in the stack. The dilution probe dilutes the gas by a fixed ratio so the analyzer is actually
measuring a much lower concentration than is actually present in the stack.
The software scales the diluted sample gas concentration readings so that the outputs show the actual
stack concentrations. Also, when calibrating the instrument or setting the ranges the values selected
are scaled to reflect the actual stack concentrations. The scaled readings are sent to the display,
analog outputs, and RS-232 port.
To use the Dilution feature:
SELECT UNITS
For stack measurement, select PPM units. To set units, press SETUP-RANGE-UNIT-PPM. Press
ENTR after the unit selection is made, then EXIT to return to upper level menus.
2. SET DILUTION RATIO
The dilution ratio of the probe is entered by SETUP-RANGE-DIL (if DIL menu is not shown
call factory). Accepted values are 1 to 1000. Press ENTR, and EXIT to return to upper level
menus. A value of 1 disables the dilution feature.
Analyzer Operator Manual, 02164, Rev. G
2
5-15

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