HOME | COMPANY | PRODUCTS | CONTACT US | 281.664.1209 / 281.664.1214

Directory: Home | Knowledge Base | Pulse Oximeters | Pulse Oximeter Product Support |


Choice Medical MD300I Handheld Pulse Oximeter Detailed Operation


The handheld pulse oximeter uses an LCD display for a readout. It can display the SpO2 and pulse rate (PR) value, as well as a pulse column and SpO2 waveform.

There are three display modes shown in Fig 3.1. The first figure is pulse column display mode. The second figure is filled waveform mode. The third figure is line waveform mode indicating SpO2% trend.

display modes

Fig.3.1 Three display modes

  • SpO2: Percent oxygen saturation value displayed above is 98%
  • PR: Pulse rate value displayed is 72 bpm
  • Pulse column: This is used for signal identification and quality indication during motion and low signal to noise situations. The bar rises and falls with the pulse, its height indicating signal quality. When the bar is very low, the SpO2 and pulse rate values may be suspect.
  • Signal strength: Indicates arterial pulse signal strength and may be used as a diagnostic tool during low perfusion for the accurate prediction of illness severity. The bar is highest when the quality of the perfusion state is best and low when the perfusion is poor.
  • PR tone modulation: Beeps in sync with the patient’s pulse, even under most challenging patient motion conditions.

Mode Introduction

Power On - Measurement and operation can be done normally.

There are three display modes: “Measure mode”, “Information display mode” and “Trouble display mode”.

Display modes

“Measure mode”: the sensor is plugged in correctly, and the finger is properly in the sensor, the oximeter is in the measurement mode for both SpO2 and PR.

“Information display mode”: The sensor is not plugged into the oximeter or the sensor is plugged in the oximeter but the finger is not in the sensor, “Probe off” or “Finger off” will be displayed respectively, and it will automatically power Off if either information display lasts for more than 8 seconds.

“Trouble display mode”: In the failure state, the oximeter will display error information, and will automatically power Off if the information display lasts for more than 8 seconds. For error information details and definitions, please refer to chapter 4.2.

Definition of key

There are two keys in the oximeter: “Function key (left key)” and “Setting key (right key)”.

“Function Key”: Located at the left of the oximeter, this acts as a Power On switch when the unit is in an Off condition. When the unit is On, it acts as a Function key

“Setting key”: Located at the right of the oximeter, it has no function when the power is off. When the unit is On, it acts as a Setting key.

Definition of Key Press

There are three ways to press the key:

Press: press the key quickly, the duration time should no more than 1 second.

Double press: Two-time continuous press, the time between the two press actions should be no more than 0.5 second.

Extended press: Press the key for more than 1.5 seconds.

Key Functions

Power On/Off

Press the Function key (left key) to power on.

The oximeter will power off automatically under the “information display mode” or “trouble mode” for 8 seconds.

Display Mode

The Display Mode setting can only be enabled under “Measure mode” and “Information Display mode”. Pressing the Function key (left key) or Setting key (right key), the display mode may be changed sequentially between “Filled Waveform”, “Line Waveform” and “Pulse Column Waveform”. Once you choose a certain mode, the oximeter will continually display in this mode until changed by the user.

Setting Mode

Enter the Setting Mode under the “Measure mode”, you can only set Brightness and Patient ID. Enter the Setting Mode under the “Information Display mode”, you can set Brightness, Patient ID, Date and Time. Current parameters and data will be displayed at the top right corner which is used to display the “PR”. The various parameters display title is as follows:

  • Br – Brightness (range:1-10)
  • ID - Patient ID (range:1-10)
  • Y – Year (range:0-99)
  • M - Month (range:1-12)
  • D – Day (range:1-31)
  • H – Hour (range:0-23)
  • M - Minute, (range:0-59)
  • S – Second (range:0-59)

a) Enter “Setting mode”

Press the function key (left key) for more than one second (extended press), the oximeter will enter into “Setting mode” and you will find a parameter item which include its title and value on the top right corner of the display (refer to Fig.2.6).

After entering the setting mode from “Information Display mode”, continually press “Function key (left key)”, the current parameter item will be changed sequentially in the following order:

Br(brightness) -->ID(patient’s ID) -->Y(year) -->M(month) -->D(date) -->H(hour) -->m(minute) -->S(second) --Br(brightness)-->...

Notice: When setting date and time, please don’t insert finger.

b) Save and exit from “Setting mode”

①Under the “Setting mode”, press “function key (left key)” to select the desired parameter item.

②Then press “Setting key (right key)” to adjust the value.

Each time when you press the “Setting key (right key)”, current parameter value will be added by 1 unit sequentially.

Double press the “Setting key (right key)” and the current parameter setting will be added by 10 units sequentially. All use circular logic.

③Press “function key (left key)” to select the next desired parameter item. Then redo step ② to adjust the value. You can continually redo step ① to ② until no parameter’s setting need to be changed.

④To finish setup, fleetly press both left and right keys together to confirm. Then the modifications under the “Setting mode” will be saved, at the same time, the system will exit from “Setting mode”.


  • To confirm the modification, the act of pressing both keys simultaneously must be fleet. Do not press them for long time.
  • The date and time adjustment only can be done in the “Setting mode” under “Information Display mode”.
c) Cancel and exit from “Setting mode”

Under the “Setting mode”, double-press the Function key (left key), the modification under “Setting mode” will be cancelled and simultaneously, the system will exit from “Setting mode”.

If there is no operation under “Setting mode” for more than 10 seconds, the system will exit from “Setting mode” automatically.

Data replay and transmission

The oximeter can record SpO2 and PR value for more than 24 hours, and can analyze records one by one. You can transfer the history data to a PC by using “MED VIEW” software and a special data cable. To transfer data to PC, the oximeter need to be registered. As for detailed setup and operation, please refer to the “MED VIEW” operator’s manual.

Notice: transmission software and data cable are not standard accessories. Contact your local dealer for purchase.

HOME | COMPANY | PRODUCTS | CONTACT US | 281.664.1209 / 281.664.1214  

Secure Payments

Proven Solutions. Fast Shipping. Fantastic Support.

Copyright © 2011 by Amperor, Inc., Houston, TX

AmperorDirect.com is a trademark of Amperor, Inc.