Avant® 2120

Avant® 2120 Specifications

Print Specs

Oxygen Saturation Display Range: 0 to 100% SpO2
Pulse Rate Display Range: 18 to 300 beats per minute (BPM)
Numeric Displays: 3-digit LEDs, Tricolor (red, green, amber)
Pulse Indicator: Amber LED

Accuracy – Sensors: Declared accuracy data for compatible sensors can be found in Nonin’s Sensor Accuracy document.
Measurement Wavelengths and Output Power*:
Red: 660 nanometers @ 0.8 mW max. average
Infrared: 910 nanometers @ 1.2 mW max. average

Method of Measurement: Oscillometric
Blood Pressure Range:
Systolic: 40 mmHg to 260 mmHg
Diastolic: 25 mmHg to 200 mmHg
MAP = 1/3 Systolic + 2/3 Diastolic

Pressure Transducer Accuracy: ±3 mmHg between 0 mmHg and 300 mmHg for operating conditions between 0 °C and 50 °C. (S.D. of 8 mmHg)
Recommended Frequency of Pressure Transducer Calibration:
The Pressure Transducer calibration should be verified yearly or every 10,000 readings, whichever comes first.

Pulse Rate Range: Up to 200 pulses per minute (BPM) [displayed if there is no value from the oximeter]
Blood Pressure Altitude: -170 to 12,000 m
Operating: 32 °F to 122 °F (0 °C to 50 °C)
Storage/Transportation: -40 °F to 158 °F (-40 °C to 70 °C)

Operating: 10% to 90% noncondensing
Storage/Transportation: 10% to 95% noncondensing

Power Requirements:
Mains: 100-240 VAC 50-60 Hz
DC Input: 12 VDC 1.5A AC power supply

Internal Power:
Battery: 7.2 volt battery pack (6 cells)
Operating Life: minimum 5 hours of continuous operation
Storage Life: 18 days
Recharge Time: 4 hours with device off

Memory: 33.5 hrs (assuming continuous operation)
Alarm Volume Range: 55–81 dBA
Informational Tone Volume Range: 50–70 dBA
Operating: Up to 40,000 feet (12,192 m)
Hyperbaric Pressure: Up to 4 atmospheres

Dimensions: 4.5 x 7.5 x 5.4 in. (11.4 x 19.0 x 13.8 cm)
Weight: 45.3 oz. (1.28 kG) with batteries

Classification per IEC 60601-1 / CAN/CSA-C22.2 No. 601.1 / UL60601-1:
Type of Protection: Class II (when on AC power with MPP30 power supply) Internally powered (on battery power)
Degree of Protection: Type BF-Applied Part (pulse oximeter).
Defibrillation-Proof Type BF Applied Part (NIBP).
Enclosure Degree of Ingress Protection: IPX2

Mode of Operation: Continuous

* This information is especially useful for clinicians performing photodynamic therapy.

Avant® 2120 Troubleshooting

  • The device will not activate.
    1. Plug in the device to recharge its battery, or replace the battery
  • You are unable to obtain a green pulse display on the bar graph.
    1. Reposition the sensor or apply the sensor to a different finger, and keep the sensor motionless. b)Warm the sensor application site.
    2. c) Allow the hand to rest comfortably without squeezing or pressing the sensor on a hard surface. d)Shield the sensor from any light source.
    3. e) Reduce or eliminate any possible interference from one of the following sources:
      • arterial catheter
      • blood pressure cuff
      • electrosurgical procedure
      • infusion line
  • The Pulse Oximeter Sensor LED appears.
    1. Reposition the sensor or apply the sensor to a different finger, and keep the sensor motionless. b) Warm the sensor application site.
  • An error code appears in the display area.
    1. Turn the unit off and back on again to remove error code.
    2. If the error persists, disconnect battery & AC, and then reconnect the power and turn unit on.
    3. The device encountered an error. See “Error Codes Table” in your manual.
  • The NIBP cuff overinflates and detaches from either the device or the hose; blood pressure readings are not displayed.
    1. Ensure that the cuff is applied and positioned correctly. See “NIBP Cuff Selection” and “NIBP Cuff Placement” in your manual for more information.
    2. Ensure that the appropriate cuff size is selected.
  • The device is in Alarm mode, but no audible alarms can be heard.
    1. Press the Alarm Silence button to activate alarm volume, or wait for two minutes, the alarm tones will automatically activate.
    2. Adjust the alarm volume, or return option switch 2 to the DOWN position if audible alarms are required.
  • The device will only operate when it is plugged in.
    1. Plug in the AC Power Supply to charge the battery.
    2. Check that the battery pack is properly connected to device.

NIBP Calibration

Calibration should be performed after every 10,000 inflations or once per year, using the following procedure. Calibration should only be performed by qualified personnel.

Suggested Equipment

  • Mercury Manometer
  • Pneumatic T-Adapter
  • Pressure Bulb

With the device turned off, connect a mercury manometer and pressure bulb to the device using a T-adapter.

  1. using the tip of a screwdriver or other similar device, place DIP switch ‘n the UP position.
  2. Turn on the device A CAL message displayed in the Systolic display window, verifying that the device is In Calibration mode.
  3. Watt for a green to appear in the Diastolic LED display.
  4. Verify that the pressure on the manometer is zero, so there is no pressure difference at the pressure transducer and outside the device.
  5. Press the NIBP button. A countdown Will begin. fOllowed by “250” in the Diastolic display.
  6. Using the pressure bulb, apply exactly 250 mmHg to the device.
  7. Press the NIBP button to calibrate the device at 250 mmHg. The device is now calibrated and Will displaya ca I cine message.
  8. Press the OWSTANDBY button to turn the device off. Return DIP switch 1 to the DOWN position.

NOTE: The pulse oximeter does not require calibration_

Error Codes

Code Description
 CAN NIBP Module, User Cancelled – The NIBP module was cancelled from taking a blood pressure reading.
E00 System Error – Retry reading.  If reading is not possible, then cycle power and retry.  Calibration may be required.
E01 NIBP Module, Bad Signals – The NIBP module was unable to complete a reading.  The failure could be due to a patient’s blood pressure falling outside the module’s range.  Check the patient, the air hose connection, and application of the cuff.


NIBP Module, Overpressure – Overpressure condition occurred.
E03 NIBP Module, Air Leak – Check hose and cuff for damage or air leaks.
E04 NIBP Module, Blockage in Line – Check hose for kinks or blockage.  Also, check NIBP module for any obstructing materials.
E05 NIBP Module, Safety Timer Timeout – The allowed time expired before the reading was complete or the system remained in test mode longer than three minutes.  .
E06 NIBP Module, Gross Movement. – Check patient and reduce motion.



NIBP Module, Transducer out of range – The zero calibration has drifted beyond the range of the automatic zero circuit.  The module pressure transducer may need re-calibration.


NIBP Module, Calibration Data Invalid


NIBP Module, ADC Hardware Failure


NIBP Module, Pressure Calibration Failed – The module was unable to reset its pressure calibration data.
E17 Undefined NIBP Error
E19 NIBP Module, No Communication – There is no data from the NIBP Module.
E31 Sound Error –  Channel 1 Failure
E32 Sound Error –  Channel 2 Failure
E33 Sound Error – Channel 1 Failure, Channel 2 Failure
E34 Sound Error –  Amp Failure
E35 Sound Error – Channel 1 Failure, Amp Failure
E36 Sound Error – Channel 2 Failure, Amp Failure
E37 Sound Error – Channel 1 Failure, Channel 2 Failure, Amp Failure
E38 Sound Error – Speaker Failure
E39 Sound Error – Channel 1 Failure, Speaker Failure
E40 Sound Error – Speaker Failure, Channel 2 Failure
E41 Sound Error – Channel 1 Failure, Channel 2 Failure,  Speaker Failure
E42 Sound Error – Speaker Failure, Amp Failure
E43 Sound Error – Channel 1 Failure, Speaker Failure, Amp Failure
E44 Sound Error – Speaker Failure, Channel 2 Failure, Amp Failure
E45 Sound Error – Channel 1 Failure, Channel 2 Failure, Speaker Failure, Amp Failure


Sound Module, Communication failure – There is no SPI communication between the Sound Module to the display board microcontroller.
E52 SCI Communication Error – There is a SCI communication problem.  There were too many overrun, checksum, and/or sync errors.
E53 External Memory Failure – The external (patient data) memory failed test.

If any of these solutions do not correct the problem with your 2120, please contact NONIN Technical Service at (800) 356-8874 or (763) 553-9968.

Frequently Asked Questions

How is the cuff inflation pressure determined?

The Avant 2120 default initial inflation pressure is 160 mmg, this value can be changed by pressing the Pressure Limit button and selecting the desired pressure. Each subsequent inflation will be dynamically determined by the Avant 2120. The previous Systolic reading will be increased by 25-30 mmHg for the next inflation.

What is the maximum inflation pressure for a reading?

The Avant 2120 will inflate to a pressure of 260 mmHg; if there is a failure and the system exceeds that pressure, the system will automatically deflate the cuff or the device will shut down dependent upon the reason for the failure.

What is the maximum and minimum pressure range the Avant 2120 is able to measure?

The range is 260-10 mmHg.

What does the MAP value represent?

The mean arterial pressure (MAP) is a calculated value that is equal to one third of the Systolic pressure plus two thirds of the Diastolic pressure. It represents the mean pressure which would be required to maintain arterial patency for appropriate blood circulation.

How do you cancel a blood pressure reading?

Press any button on the front panel during a reading.

How can the pulse rate be displayed if only blood pressure is measured?

The pulse rate will be derived from the pulsations of the NIBP oscillometric waveform.

What is the overall length of the blood pressure cuff hose?

Six (6) feet (2m).

How long will the blood pressure reading remain on the display?

Five (5) minutes.

How many blood pressure readings will be saved for review during one power-up period?

Up to 300 readings will be stored in the volatile memory for review. The pressure displays will change from green to amber to indicate history review.

How do you review previous blood pressure readings?

Press the History Review button. The most recent previously measured reading will appear on the screen. The number of the reading will appear in the same field as the inflation pressure. To move through the saved readings, press the minus (-) button or (+) button as needed.

When blood pressure history is reviewed the timer shows the number saved reading; does that mean the timer has been reset?

No, the elapsed time from the most recent reading is still being timed.

Cant the blood pressure module be calibrated?


To calibrate, the blood pressure module dipswitch #1 must be in the on or up position. Follow the instruction for calibration found in the Avant 2120 Operator’s Manual. The blood pressure module should be calibrated every 10,000 inflations or once per year.

Can the Avant 2120 NIBP module be used with adult and pediatric patients?

Yes, the NIBP may be used for patiens with arm circumferences of 18-42 cm. Care should be taken to ensure the proper cuff size and appropriate inflation pressure is selected.

How do you retain the last User selected alarm settings?

While turning the unit on, continue to hold the On/Standby button while pressing and holding the Alarm Limits button for at least one second.

If the Avant 2120 was powered up without an SpO2 sensor connected, does the unit have to be restarted to use the oximetry function?

No, simply connect the sensor to the unit and it will be ready to include the pulse oximetry readings.

How many hours of pulse oximetry data can be stored in the non-volatile memory for download?

Up to 33.5 hours of pulse rate and SpO2 data may be stored. nVision software may be used to retrieve and analyze the data.

What is the longest overall oximeter cable that can be used with the Avant 2120?

The recommended overall maximum length of sensor cable including extension cable is 40 feet (12m).

Does the oximeter require calibration.

No calibration is required.

Can the Avant 2120 oximetry module be used with neonates?

The pulse oximeter function may be used for neonates through adult patients; Nonin offers a complete line of patient sensors to accommodate every application.

How many dipswitches does the Avant 2120 have and what are they used for?

There are eight (8) numbered dipswitches. Dipswitches 1, 2, and 3 are currently assigned for use.

#1 activates calibration of the blood pressure module, #2 allows the alarm volume to be set to 0 and #3 changes the date format. Please refer to the Avant 2120 Operator’s Manual for additional information.

Where are the dipswitches located on the Avant 2120?

They are underneath the green battery door cover on the rear of the unit. Use a small Phillips screwdriver to remove the battery door. Please refer to the Avant 2120 Operator’s Manual for additional information.

What is the warranty on the Avant 2120?

Blood Pressure Module and Battery Pack – 1 Year

Oximetry Module – 3 Years

How long can the Avant 2120 function on a fully charged battery?

  • Continuous SpO2 monitoring and NIBP readings every minute – 5 hours minimum
  • Continuous SpO2 monitoring and NIBP readings every 5 minutes – 6 hours minimum

How long does it take to recharge the battery pack?

Approximately four hours if they are completely discharged and the system is not in use. The battery pack continuously charges while the device is plugged into AC power, charging will be longer if the system is in use.


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