Auto-Output Mode; Trend-Output Mode; Analog Device Communications - GE TruTrak+ 3900 User Manual

3900/3900P User's Manual

Auto-output mode

This is the default mode, which transmits monitoring data being currently
collected. It is present when the oximeter begins communication with a computer,
and is the mode the oximeter returns to when exiting from other modes.
Messages relating to SpO
on the oximeter also appear on the computer.

Trend-output mode

This mode allows up to 24 hours of trend data to be output to a computer.
NOTE: 24 hours of trend data are output in 10 minutes or less, depending on the
baud rate.
To enter trend-output mode:
Enter: <esc> CJ <enter>
To exit trend-output mode while trend data are being output:
Enter: <esc> CK <enter>
After trend data are output, auto-output mode automatically resumes. Trend data
are still in memory and can be output again without turning the oximeter off and
on again.
NOTE: No other modes can be activated through the computer interface while in
trend-output mode; only the trend output exit command is recognized.
To clear-trend data in the oximeter's memory using the computer:
Enter: <esc> CP <enter>

Analog device communications

CAUTION: To prevent improper loading, which upsets the correspondence between the measured
voltage and the intended output voltage, connect only a high impedance device (1K Ω or higher) to
the analog output.
The 3900/3900P oximeter interfaces with any analog recording device capable of
accepting the 0- to 1-volt signal outputs that represent the SpO
values.
If you want to send data directly to a serial device (e.g., a computer) and to an
analog device simultaneously, you may purchase the Datex-Ohmeda serial/analog
cable; see Parts list in chapter 6.
B-4
, pulse rate, PI , and alarm limits violations that appear
2 r
and pulse rate
2