AirSense Model 310e Operator’s Manual
The type of analog output is determined by the setting of the
analog output selector shown in Figure 2.
The analog output of the Model 310e is completely isolated
from the power supply. The common outputs of multiple
units can be connected together with no interaction
regardless of power supply hook-up.
Voltage
When the outboard and middle pins of the analog output
selector are connected with the shorting block, a voltage
output appears between the two terminals marked ANALOG
OUTPUT. The output voltage increases linearly from 0
volts at the low output threshold to 10 volts at the high
output threshold. The unit is shipped from the factory with
the low output threshold at 0 ppm and the high output
threshold at 2000 ppm. See the Analog Output Range
Adjustment section on page 7to change the analog output
range limits.
Current
When the inboard and middle pins of the analog output
selector are connected with the shorting block, a current
output appears between the two terminals marked ANALOG
OUTPUT. The output current increases linearly from 4 mA
at the low output threshold to 20 mA at the high output
threshold. The unit is shipped from the factory with the low
output threshold at 0 ppm and the high output threshold at
2000 ppm. See the Analog Output Range Adjustment section
on page 7to change the analog output range limits.
If the total resistance between the two terminals exceeds the
specified maximum loop resistance, the output current may
be erroneously low at high concentrations.
Verifying Voltage or Current Output Connection
After the voltage or current output of the Model 310e is
connected to a controller or indicator, the following check
should be performed to ensure that the connection has been
properly established and the Model 310e is transmitting the
correct values:
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