Teledyne 3000TB, Operating Instructions Manual

Page: 39 / 107

Installation Model 3000TB
Teledyne Analytical Instruments 24
Examples:
The analog output signal has a voltage which depends on the
oxygen 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 signal output for concentration is linear over the currently selected
analysis range. For example, if the analyzer is set on a range that was
defined as 0–100 ppm O
2
, then the output would be as shown in Table 3-1.
Table 3-1: Analog Concentration Output—Example
Voltage Signal Current Signal
ppm O
2
Output (V dc) Output (mA dc)
0 0.0 4.0
10 0.1 5.6
20 0.2 7.2
30 0.3 8.8
40 0.4 10.4
50 0.5 12.0
60 0.6 13.6
70 0.7 15.2
80 0.8 16.8
90 0.9 18.4
100 1.0 20.0
To provide an indication of the range, a second pair of analog
output terminals are used. They generate a steady preset voltage (or
current when using the current outputs) to represent a particular range.
Table 3-2 gives the range ID output for each analysis range.
Table 3-2: Analog Range ID Output—Example
Range Voltage (V) Current (mA)
LO 0.25 8
MED 0.50 12
HI 0.75 16
CAL (0-25%) 1.00 20