25
Memory and Data Output Features
Memory Features
The Model 7500FO can collect and store 70 hours of continuous SpO
2
and pulse rate information.
Data may be played back with data retrieval software (Nonin’s nVISION software is
recommended). If you wish to create your own software, contact Nonin for the data format.
The memory in the Model 7500FO functions much like an “endless loop” tape. When the memory
is full, the unit begins overwriting the oldest data with new data. Data is written in 4-minute
intervals.
Each time the Model 7500FO is turned on, the current time/date information (if the clock is set
properly) is stored in memory, starting a new recording session. Only recording sessions greater
than one minute in length are stored in memory.
Patient SpO
2
and pulse rate are sampled every second. Every 4 seconds, the extreme value of
the 4-second sample period is stored. Oxygen saturation values are stored in 1% increments in
the range of 0 to 100%.
The stored pulse rate ranges from 18 to 300 pulses per minute. The stored values are in
increments of one pulse per minute in the interval from 18 to 200 pulses per minute, and in
increments of 2 pulses per minute in the interval from 201 to 300 pulses per minute.
Patient data is retained even when both external and battery power are lost.
Clearing Patient Memory
Patient memory can be cleared using the Model 7500FO’s Setup mode. Press the Limits button
to enter Setup mode, and use the Limits button again to scroll through the device’s options until
Memory Clear is displayed. Select “Yes” or “No” using the Plus (+) or Minus (-) buttons to clear
patient memory, and then confirm your selection using the Limits button.
Playing Back Memory Data
The Model 7500FO has a Memory Playback feature, allowing stored data to be output through an
external serial connection. Playing back the data does not clear the data from memory.
1. With the unit off, connect the serial connector port of the Model 7500FO to the back of
your computer using the 7500 SC cable, which is available from Nonin.
2. Press and hold the Plus (+) button while briefly pressing the ON/STANDBY button.
3. Release the Plus (+) button. Playback mode will be shown on the SpO
2
and Pulse Rate
displays until memory playback is completed.
4. When Memory Playback is complete, the device will return to normal operation.
NOTES:
• Patient memory cannot be cleared when the Model 7500FO is in Patient Security mode.
• If using nVISION software, select the Model 7500 option for model type.
• The event marker is not stored in the 7500FO memory.
CAUTION:
If the entire memory is filled, portions of the oldest record will be
overwritten when a new record begins.
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