Analog Outputs - Teledyne 2000A-EU Operating Instructions Manual

Thermal Conductivity Analyzer
Figure 3-4: Equipment Interface Connector Pin Arrangement
There are four DC output signal pins—two pins per output. For
polarity, see Table 3-1. The outputs are:
0–1 V dc % of Range: Voltage rises linearly with increasing concentra-
0–1 V dc Range ID:
4–20 mA dc % Range: Current rises linearly with concentration, from 4
4–20 mA dc Range ID: 8 mA = Range 1, 12 mA = Range 2, 16 mA =
The analog output signal has a voltage which depends on gas concen-
tration relative to the full scale of the 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.
3.3.3.1

Analog Outputs

tion, from 0 V at 0 concentration to 1 V at full
scale. (Full scale = 100% of programmable range.)
0.25 V = Range 1, 0.5 V = Range 2, 0.75 V =
Range 3, 1 V = Cal Range.
mA at 0 concentration to 20 mA at full scale. (Full
scale = 100% of programmable range.)
Range 3, 20 mA = Range 4.
Table 3-1: Analog Output Connections
Pin Function
3 + Range ID, 4-20 mA, floating
4 – Range ID, 4-20 mA, floating
5 + % Range, 4-20 mA, floating
6 – % Range, 4-20 mA, floating
8 + Range ID, 0-1 V dc
23 – Range ID, 0-1 V dc, negative ground
24 + % Range, 0-1 V dc
7 – % Range, 0-1 V dc, negative ground
Examples:
Teledyne Analytical Instruments
Installation 3
3-5