Analog Outputs; Table 13: Analog Pinouts - Nellcor N-395 Operator's Manual

Data Porf Protocol
ANALOG OUTPUTS
The N-395 data port also provides analog voltage outputs
between pins 6, 13, 14, and ground (pins 5 or lo), which can be
used to calibrate iiistruments such as a chart recorder. The
voltage represents a specific measured parameter's current value.
The voltage differential varies proportionally froin 0 to 1 volt as
the pin's parameter varies over its full range of values, as
indicated in Table 13.
Table 13: Analog Pinouts
For example, as the current value of %SpO2 varies from 0 to
loo%, the voltage froin pin 6 to ground (pin 10) would vary from
0 to 1 volt. A voltage of .94 volts indicates a current %SpO2
value of 94.
The analog output calibration function can be accessed from the
main menu by pressing SETUP, NEXT, NEXT, ANALOG.
Selecting "0 VOLT" or "1 VOLT" causes that voltage to appear
at pins 6, 3, or 10. Selecting "STEP9' causes the voltage to
increase from 0 to 1 volt at l / l ~ ' ~ - v o l t increments, with each step
lasting at least 1 second.
Qualified service personnel using the procedure described in the
N-395 service manual can perform calibration of the analog
output and the attached device.