Open Easy III System Utilities
Click System Setup, click Data Map, find the Data Map that you want to add/calibrate EtCO2 on and click Edit.
Check to see if there is already an item in the Data Map for EtCO2. If there is, you can click the Edit DC Input Calibrations button and continue to Step 3.
If there is no entry for EtCO2 in the Data Map, click the drop-down arrow on the empty bottom line, scroll down and select EtCO2 (mmHg):
Click on the button labeled Edit DC Input Calibrations.
In the window labeled DC Input Calibrations, either select the channel with the ETCO2 (mmHg) data type from your list and click Calibrate or click the Add button, type EtCO2 in the Name field and use the drop down under Data Type to pick EtCO2 (mmHg).
Check that the device is set to 0 mm Hg and 100 mm Hg on the right side of the window.
If not, click on the button that is incorrect and change the Calibrated Value to the desired reading (here we had to change the default value from 50 mm Hg to 100 mm Hg).
Click on the button labeled Read voltage from attached device for each calibration value. There can be a short pause while the software connects to the amplifier after you click this button, this is normal.
Click on the button to the right that is labeled with Device Input.
Change the input jack in the drop down to the DC Input that you have EtCO2 connected to on the Easy III Amplifier (typically this will be where on the Easy III amplifier you have connected the cable with the white band from the back of the RespSense). You need to choose a DC Input not being used by anything else in your Data Map.
On the Nonin Respsense:
Turn on the Respsense by pressing the Power button in the top right-hand corner of the device.
Select Alarm Mode
Select Patient Weight
The Respsense will start by sending a 0 volt signal right at start up for 1 minute (there is no indication on the screen that it is calibrating with a 0 volt signal), so quickly return to the computer for the next steps in Easy III.
In Easy III:
Click on the button in your Device Calibrations that is labeled 0 mm Hg. A DcCalibrationManager window will appear asking you to connect and if you are ready . Click OK.
A Calibrating window will appear and a bar will move across. The Calibrated Value box should show 0. Click on the Update button when it appears.
When it has been 1 minute after starting the device up, the Respsense will switch over to sending a 1 V signal. If you miss when the signal changes, you will need to turn the Respsense off and then back on and then wait for 1 minute for the device to switch to 1 V again. You should be able to see this change in the amplifier reading box in this window:
Once that value changes to 1.0 V, click on the button in your Device Calibrations that is labeled 100 mm Hg. A DcCalibrationManager window will appear again. Click OK.
A Calibrating window will appear and a bar will move across. The Calibrated Value box should show 100. Click on the Update button when it appears.Click Update at the bottom of your Device Calibration window.
Your EtCO2 signal is now calibrated.
To Calibrate an additional signal:
In Easy III, Select the channel with the CO2 Pressure (mmHg) data type from your list and click Calibrate or click the Add button, type CO2 Waveform in the Name field and use the drop down under Data Type to pick CO2 Pressure (mmHg). Check that the device is set to 0 mm Hg and 100 mm Hg on the right side of the window.
If not, click on the button that is incorrect and change the Calibrated Value to the desired reading.
Click on the button labeled Read voltage from attached device for each calibration value. There can be a short pause while the software connects to the amplifier after you click this button, this is normal.
Click on the button to the right that is labeled with Device Input.
Change the input jack in the drop down to the DC Input that you have CO2 Waveform connected to on the Easy III Amplifier (typically this will be where on the Easy III amplifier you have connected the cable with the brown bandconnected). You need to choose a DC Input not being used by anything else in your Data Map.
On the RespSense:
Turn on the Respsense by pressing the Power button in the top right-hand corner of the device (if the device was already on from the previous step, then first turn the device off. Wait a few seconds and then turn it back on).
Select Alarm Mode
Select Patient Weight
The Respsense will start by sending a 0 volt signal right at start up for 1 minute (there is no indication on the screen that it is calibrating with a 0 volt signal), so quickly return to the computer for the next steps in Easy III.
In Easy III:
Click on the button in your Device Calibrations that is labeled 0 mm Hg. A DcCalibrationManager window will appear asking you to connect and if you are ready . Click OK.
A Calibrating window will appear and a bar will move across. The Calibrated Value box should show 0. Click on the Update button when it appears.
When it has been 1 minute after starting the device up, the Respsense will switch over to sending a 1 V signal. If you miss when the signal changes, you will need to turn the Respsense off and then back on and then wait for 1 minute for the device to switch to 1 V again. You should be able to see this change in the amplifier reading box in this window:
Once that value changes to 1.0 V, click on the button in your Device Calibrations that is labeled 100 mm Hg. A DcCalibrationManager window will appear again. Click OK.
A Calibrating window will appear and a bar will move across. The Calibrated Value box should show 100. Click on the Update button when it appears.
Click Update at the bottom of your Device Calibration window.
Your CO2 Waveform signal is now calibrated.
Click OK on the DC Input Calibrations window.
Adding your newly calibrated signal to Data Map
You should now be in the Edit Data Map window.Check to see if you have entries for ETCO2 (mmHg) and/or CO2 Pressure.
Also, check to see that they are set to the DC inputs that you calibrated above.
If they do not have associated Inputs, select the blank box in the Input column to the right of the Data Type, Click on the Device tab on the left side. Click on the DC Input that your EtCO2 is plugged into.
Choose EtCO2 from the list and click Select. It should fill with the settings for that channel. You can click the 0 to 100 button to alter the range that will display on the PSG trace (we have it set to 20-70 here).
Repeat for CO2 Wave as needed.
Click OK at the bottom of your Edit Data Map window. Click OK at the bottom of the Edit Data Maps window.
After calibration and adding to your Data Map, you will need to add the channels to any montages you would like to see them in. From within the Edit Montage, you will now find your EtCO2 and CO2 Waveform entries on the Data Type tab.