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Teledyne 6000B - Photometric analyzer User Manual

Page 19

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Photometric Analyzer

Part I: Control Unit

Part I: 2-5

Teledyne Analytical Instruments

4–20 mA dc % Range: (-M Option) Current increases linearly with increas-

ing sample concentration, from 4 mA at 0% to 20
mA at full scale 100%. (Full scale = 100% of
programmed range.)

4–20 mA dc Range ID: (-M Option) 8 mA = Low Range, 12 mA = Me-

dium Range, 16 mA = High Range, 20 mA = Cal
Range.

Figure 2-5: Analog Output Connections

Examples:

The analog output signal has a voltage which depends on the sample

concentration AND the currently activated analysis range. To relate the
signal output to the actual concentration, it is necessary to know what range
the instrument is currently on, especially when the analyzer is in the
autoranging mode.

The signaloutput for concentration is linear over currently selected

analysis range. For example, if the analyzer is set on a range that was
defined as 0-10 %, then the output would be as shown in Table 2-1.